Download IM 1072-3 Daikin Water to Water Source Heat

Installation
and Maintenance Manual
IM 1072-3
Group: WSHP
Part Number: 910163742
Date: February 2015
Daikin Water to Water Source Heat Pumps
3 to 35 Tons with R-410A
WRA - Heating and Cooling Models
WHA - Heating Only Models
WCA - Cooling Only Models
People and ideas you can trust.™
Contents
Compressor Control Module Functional Operation –
208-230/60/3, Unit Sizes 036, 048, 060 and 072 . . . 22
Product Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safe Operation Rules . . . . . . . . . . . . . . . . . . . . . . . . . 4
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
208-230/60/3, Unit Sizes 120, 150, 180, 240
and 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
WRA, WHA, WCA 036 – 420 . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
(Continued) 208-230/60/3, Unit Sizes 120, 150, 180,
240 and 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Pre-Installation and Code Requirements . . . . . . . . . . 6
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mounting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Piping the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Optional Low Temperature Control Board "LTC" – 3
Phase, Unit Sizes 120, 150, 180, 240 and 300 . . . . 27
Domestic Hot Water Heat Recovery . . . . . . . . . . . . . 6
Compressor Control Module Functional Operation –
208-230/60/3, Unit Sizes 120, 150, 180, 240
and 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . 8
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
208/230-60-3, Unit Sizes 360, 420 . . . . . . . . . . . . . . 30
WRA, WCA, WHA – Size 036-072 . . . . . . . . . . . . . . . 9
WRA, WCA, WHA – Size 120-180 . . . . . . . . . . . . . . 10
WRA, WCA, WHA – Size 240-420 . . . . . . . . . . . . . . . 11
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Optional Low Temperature Control Board "LTC" –
208/230-60-3, Unit Sizes 360, 420 . . . . . . . . . . . . . . 33
Engineering Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operating Pressures (PSIG) . . . . . . . . . . . . . . . . . . 12
Compressor Control Module Functional Operation –
208/230-60-3, Unit Sizes 360, 420 . . . . . . . . . . . . . . 34
Antifreeze Correction . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Waterflow Correction . . . . . . . . . . . . . . . . . . . . . . . . 13
460-60-3, 575-60-3, Unit Sizes 360, 420 . . . . . . . . . 36
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
208-230/60/1, Unit Sizes 036, 048, 060 . . . . . . . . . . 14
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Optional Low Temperature Control Board "LTC" –
460-60-3, 575-60-3, Unit Sizes 360, 420 . . . . . . . . . 39
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Optional Low Temperature Control Board "LTC" –
208-230/60/1, Unit Sizes 036, 048, 060 . . . . . . . . . . 16
Compressor Control Module Functional Operation
208-230/60/1, Unit Sizes 036, 048, 060 . . . . . . . . . . 17
Compressor Control Module Functional Operation –
460-60-3, 575-60-3, Unit Sizes 360, 420 . . . . . . . . . 40
Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Model WHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Model WRA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
208-230/60/3, Unit Sizes 036, 048, 060 and 072 . . . 19
Model WCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Check, Test and Start Form . . . . . . . . . . . . . . . . . . . 45
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
General Service Guide . . . . . . . . . . . . . . . . . . . . . . . 46
Optional Low Temperature Control Board "LTC" – 208230/60/3, Unit Sizes 036, 048, 060 and 072 . . . . . . 21
Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . 47
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
2
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Product Nomenclature
Category
Product Category
Code Item
Code Option
1
1
Code Designation & Description
W = Water Source Heat Pump
Product Identifier
2
2-4
WCA = Base Cooling Only Unit with Copper Coaxial Water Coils
WHA = Base Heating Only Unit with Copper Coaxial Water Coils
WRA = Base Cooling and Heating Only Unit with Copper Coaxial Water Coils
Design Series
3
5
1
2
3
4
Nominal Capacity 4
6-8
036=
048 =
060 =
072 =
120 =
150 =
180 =
240 =
300 =
360 =
420 =
36,000 Btuh Nominal Cooling
48,000 Btuh Nominal Cooling
60,000 Btuh Nominal Cooling
72,000 Btuh Nominal Cooling
120,000 Btuh Nominal Cooling
150,000 Btuh Nominal Cooling
180,000 Btuh Nominal Cooling
240,000 Btuh Nominal Cooling
300,000 Btuh Nominal Cooling
360,000 Btuh Nominal Cooling
420,000 Btuh Nominal Cooling
Unit Control
5
9
A
L
D
T
ALC control for standard Sequence of Operations (See Note)
ALC control w/ Lonworks card
Terminal strips for field-mounted DDC controls
Terminal strips for aquastat control
Note:
=
=
=
=
=
=
=
=
1st Design
2nd Design
3rd Design
4th Design
ALC controls include built-in communication card for BACnet®, Modbus and N2 protocols. For use with Lonworks® protocol, the accessory Lonworks Card
must also be selected. It is required that at least one BACview6 handheld be purchased per jobsite unless other means of communicating with the controller is
being used. If an ALC control with a non-standard sequence of operations is required, contact factory for pricing.
Voltage 6
10
E
F
K
L
=
=
=
=
208-230/60/1
208-230/60/3
460/60/3
575/60/3
Head Pressure Control
7
11
Y = None
A selection must be made from
this section for units only if unit will
operate as decribed below:
Units operating in cooling mode with an entering water temperature of 75°F (23.9°C) or higher do not require water regulating valves.
Units operating AT ANY TIME in cooling mode with an entering water temperature less than 75°F (23.9°C) require water regulating valves.
Includes valves, bypass refrigeration circuit and check valve. Water Piping Location
8
12
F
T
L
R
=
=
=
=
Front
Top
Left Hand Side
Right Hand Side
Control Box Location
913
F = Front
L = Left Side Control Box
R = Right Side Control Box
Status Lights
1014-15
YY = None
SL = Three Lights-Compressor-1,
Compressor-2, Compressor fault
Freezestat
1116-17
YY = None
FS = Adjustable for Geothermal and Boiler/Tower Application
Construction Type
1218
A
= Standard
Source Water to Refrigerant 13
19
Heat Exchanger Construction
C
L
S
B
Desuperheater 14
20
Y = None
D = Waste Heat Recovery Water Heater
Refrigerant
1521
A
Cabinet Electrical 22
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=
=
=
=
Copper Coax
Load Side Cupro Nickel Coax
Source Side Cupro Nickel Coax
Load & Source Side Cupro Nickel Coax
= R-410A
YYY= Reserved for future use
3
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Safety Information
Safe Operation Rules
Installation and maintenance are to be performed only
by qualified personnel who are familiar with and in compliance with state, local and national codes and regulations, and experienced with this type of equipment.
Please take a few minutes to read the instructions before
you install the heat pump. This will help you obtain the
full value from this unit. It will also help you avoid needless costs that result from incorrect installation and are
not covered in the warranty.
Follow these instructions carefully. Failure to do so could
cause a malfunction of the heat pump, resulting in injury,
death and/or property damage.
Tubing and compressor contain high pressure refrigerant
and they must not be exposed to high temperature or be
punctured.
Electric Shock Hazard.
Turn Off All Power
Before Servicing.
Warning Label
White lettering on a black background except the word
WARNING which is white with an orange background.
WARNING
Fire Hazard.
To prevent electrical shock, disconnect electric power to
system at main fuse or circuit breaker box until installation is complete.
Use copper wire only.
Failure to observe
could result in property
damage, bodily injury
or death
CAUTION
Sharp edges can cause personal injury. Avoid contact with
them.
Safety and Signal Words
The signal words DANGER, WARNING and CAUTION
are used to identify levels of hazard seriousness. The
signal word DANGER is only used on product labels to
signify an immediate hazard. The signal words WARNING and CAUTION will be used on product labels and
throughout this manual and other manuals that may apply to the product.
Caution Label
White lettering on a black background except the word
CAUTION which is white with a yellow background.
Cuts and Abrasion
Hazard.
DANGER
Wear gloves and handle
with care.
Immediate hazards which WILL result in severe personal
injury or death.
Failure to observe could
result in bodily injury.
WARNING
Hazards or unsafe practices which COULD result in
severe personal injury or death.
WARNING
CAUTION
Hazards or unsafe practices which COULD result in
minor personal injury or product or property damage.
This unit contains HFC-(R-410A), a azeotropic mixture of
R-32 (Difluoromethane) and R-125 (Pentafluoroethane).
Do Not Vent HFC-(R-410A) to the atmoshpere. The U.S.
Clean Air Act requires the recovery of any residual refrigerant. Do not use R-22 service equipment or components on R-410A systems.
Danger Label
White lettering on a black background except the word
DANGER which is white with a red background.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
4
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Electrical Data
WRA, WHA, WCA 036 – 420
Table 1: Electrical data
Total Unit FLA
Voltage
Min./Max.
Minimum Circuit
Ampacity
Max. Circuit
Breaker
Maximum
Fuse HACR
Breaker
Compressor
Unit Size
Voltage/Hz/Ph
Quantity
036
048
060
072
RLA (each)
LRA (each)
208-230/60/1
16.7
79.0
33.4
197/253
20.9
35
35
208-230/60/3
10.4
73.0
20.8
187/253
13.0
20
20
1
5.8
38.0
11.6
414/506
7.3
15
15
575/60/3
3.8
36.5
7.6
517/632
4.8
15
15
208-230/60/1
19.9
109.0
39.8
197/253
24.9
40
40
208-230/60/3
13.6
83.1
27.2
187/253
17.0
30
30
460/60/3
1
6.1
41.0
12.2
414/506
7.6
15
15
575/60/3
4.2
33.0
8.4
517/632
5.3
15
15
208-230/60/1
23.1
134.0
46.2
197/253
28.9
50
50
208-230/60/3
16.1
91.0
32.2
187/253
20.1
35
35
460/60/3
1
7.1
46.0
14.2
414/506
8.9
15
15
575/60/3
5.6
37.0
11.2
517/632
7.0
15
15
208-230/60/3
20.6
155.0
41.2
187/253
25.8
45
45
9.7
75.0
19.4
414/506
12.1
20
20
7.7
54.0
15.4
517/632
9.6
15
15
16.1
91.0
32.2
187/253
36.2
50
50
7.1
46.0
14.2
414/506
16.0
20
20
460/60/3
460/60/3
1
575/60/3
208-230/60/3
120
150
460/60/3
2
575/60/3
5.6
37.0
11.2
517/632
12.6
15
15
208-230/60/3
20.6
155.0
41.2
187/253
46.4
60
60
9.7
75.0
19.4
414/506
21.8
30
30
7.7
54.0
15.4
517/632
17.3
25
25
25.0
164.0
50.0
187/253
56.3
80
80
12.2
100.0
24.4
414/506
27.5
35
35
460/60/3
2
575/60/3
208-230/60/3
180
240
300
460/60/3
2
575/60/3
9.0
78.0
18.0
517/632
20.3
25
25
208-230/60/3
30.2
225.0
60.4
187/253
68.0
90
90
16.7
114.0
33.4
414/506
37.6
50
50
460/60/3
2
575/60/3
12.2
80.0
24.4
517/632
27.5
35
35
208-230/60/3
33.4
239.0
66.8
187/253
75.2
100
100
18.0
125.0
36.0
414/506
40.5
50
50
12.9
80.0
25.8
517/632
29.0
40
40
51.3
300.0
102.6
187/253
115.4
150
150
23.1
150.0
46.2
414/506
52.0
70
70
575/60/3
19.9
109.0
39.8
517/632
44.8
60
60
208-230/60/3
55.8
340.0
111.6
187/253
125.6
175
175
27.0
173.0
54.0
414/506
60.8
80
80
23.8
132.0
47.6
517/632
53.6
70
70
460/60/3
2
575/60/3
208-230/60/3
360
420
460/60/3
460/60/3
575/60/3
2
2
Legend:
FLA = Full Load Amps
HACR = Heating, Air Conditioning and Refrigeration Breaker
LRA = Lock Rotor Amps
RLA = Rated Load Amps
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5
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Installation
Pre-Installation and Code
Requirements
Piping the Unit
After removing the unit from the carton, immediately
remove the panels and inspect for any damage that
might have occurred during shipment. Report concealed
damage immediately to the transportation company and
request inspection.
The electric power source must be the same voltage and
phase as shown on the serial plate. Line and low voltage
wiring must be done in accordance with local codes or
the national electric code.
Make a survey of the final location for the unit before setting
it in place. The unit should be centrally located with respect
to the distribution system. Install the unit within a heated
area. Exposure to inclement weather conditions may cause
freeze damage that is not covered by the warranty.
Table 2: Capacity data
Model
Heating (Btuh)
Cooling (Btuh)
036
48,200
34,300
048
58,200
42,100
060
67,200
46,000
072
85,500
62,200
120
129,000
94,500
150
170,400
122,140
180
237,000
157,000
240
290,900
202,400
300
339,720
221,800
360
416,900
284,700
420
493,200
358,600
Notes: At standard rating conditions of:
Heating - 100°F entering load water, 70°F entering source water.
Cooling - 55°F entering load water, 85°F entering source water.
Mounting the Unit
The unit should be mounted level on a vibration absorbing pad slightly larger than the base to provide isolation
between the unit and the floor. It is not necessary to
anchor the unit to the floor.
The electrical connections are accessible from the front.
The compressor can be accessed from either side. A
minimum of 24" clearance in front and sides of the unit
should be provided to allow sufficient room to make
water and electrical connections. If the unit is located in
a confined space such as a closet, provisions must be
made for unit servicing. Unit sizes 036 thru 072 may be
stacked vertically (2 high) in tight mechanical rooms.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
Both source and load connections must be at least as
large as the connections on the unit. The unit may be
furnished with either copper or optional cupronickel coil
on either source or load coaxial heat exchanger. Cupronickel should always be used when chlorinated water or
ground water which is high in mineral content is the load
or source load fluid. Never use flexible hoses that are
smaller (inside diameter) than that of the water connection on the unit. Make sure hoses and pipes are suitable
for system water pressure and sized for proper flow rate.
The supply and the discharge pipes should be insulated
to prevent condensation damage caused by low water
temperature in the pipes.
If water hammer should occur during start-up or shut
down, slow closing diaphragm type solenoid valves
should be used. Placing the solenoid valve on the outlet
side of the system helps relieve this situation. Due to
high pressure drop or poor throttling characteristics,
globe and gate valves should not be used, all flow valves
should be ball type.
Domestic Hot Water Heat Recovery
The unit may have an optional factory installed waste
heat recovery feature. The heat recovery device is factory piped to the refrigerant circuit of the unit. The plumbing to the water tank and the power to the recovery
pump are to be completed in the field as required.
Care should be exercised in plumbing water lines to and
from the water heater.
Note: It is important that both water lines be insulated. For run
less than 50 feet one way, use 1/2" O.D. water lines on
models sizes 036 thru 072. A run over 50 feet should be
avoided. On models 120 thru 420 specific system data
must be matched to industry standard pipe sizing charts.
To make a connection to Hot Water Heat Recovery:
1. Turn off power or gas valves to the water heater.
2. Turn off water supply to the water heater.
3. Open hot water faucet and drain tank.
4. Connect tubing to “Heat Recovery Water Out” on
the unit and extend this line to the hot water heater.
Attach to hot water heater with fittings.
CAUTION
Improper water flow in the system due to piping, valving or improper pump operating will void the warranty.
5. Connect tubing to “Heat Recovery Water In” on the
unit and extend this line to the water heater. Attach
to cold water supply. Place pump in this line.
6. Set water heater thermostat as follows:
6
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Applications
7. Electric, Double element - Upper 125°F, Lower
minimum Gas, Oil or Single element - 125°F
8. Wire according to single phase diagram ( on page
14) and three phase diagram ( on page 19 and
on page 24).
9. The piping and wiring are now complete. Turn on
water supply to water heater. With an open hot
water faucet, allow tank to fill. Bleed air from water
lines. Check for water leaks. Do not restore power
to water heater until after you have verified that
the heat recovery unit is working and you have hot
water circulating back to the water heater. Restore
power to the water heater.
10. On start up of the unit, make the following operation
checks:
• Pump runs only when the compressor is on
• Pump is turned on by thermostat on compressor discharge line
• All air is purged from water lines
• Verify water circulation to and from water heater
Cooling Tower/ Boiler Application
Closed Loop
Cooling Tower and Boiler Loop System temperature is
usually maintained between 55°F and 90°F. In the cooling mode, heat is rejected from the unit into the source
water loop. To reject excess heat from the water loop,
the use of a closed circuit evaporative cooler or an open
type cooling tower with a secondary heat exchanger
between the tower and the water loop is recommended.
When utilizing open cooling towers chemical water treatment is mandatory so that the water is free from corrosive minerals. It is imperative that all air be removed
from the source closed loop side of the heat exchanger
to protect against fouling.
In the heating mode, heat is absorbed from the source
water loop. A boiler can be utilized to maintain the loop
at the desired temperature. In milder climates a “flooded
tower” concept is often used. This concept involves adding makeup water to the cooling tower sump to maintain
the desired loop temperature.
When making water connections to unit sizes 036 thru
072, a Teflon taped thread sealant is recommended to
minimize fouling of the pipes. Sweat connections are
used for unit sizes 120 thru 420. The water lines should
be routed so as not to interfere with access to the unit.
The use of short lengths on high pressure hose with a
swivel type fitting may simplify the connections and prevent vibration transmission to the building.
Before final connection to the unit, the supply and return
hose kits must be connected together and the system
flushed to remove dirt, piping chips and foreign material.
Ball valves should be installed in the supply and return
lines for unit isolation and unit water flow rate balancing.
The return valve can be adjusted to obtain the proper
flow rate whenever the unit heats or cools.
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7
CAUTION
Water piping exposed to outside may freeze.
Pressure/temperature ports recommended both supply and
return lines adjacent to the unit for system flow balancing.
Flow can be accurately set by measuring the refrigerant-towater heat exchangers water side pressure drop.
Well Water Application Open Loop
Water pressure must be maintained in the heat exchanger by placing water control valves at the outlet of
the unit. A bladder type expansion tank may be used to
maintain pressure on the system. Pressure/temperature
ports should be used to set flow rates by checking pressure drop across the heat exchanger. Avoid using low
voltage (24 volt) solenoids, using them may overload
the unit transformer or interfere with the lockout impedance circuit. Line voltage solenoids across the load side
of compressor contactor are recommended. Normally
residential systems require about 2-gpm of flow rate per
ton of cooling capacity is needed in open loop systems.
Discharge water from a heat pump is not contaminated
in any manner and can be disposed of in various ways
depending on local building codes.
Disposal methods may be by recharge well, storm sewer, drain field, adjacent stream or pond. Most local codes
forbid the use of sanitary sewer for disposal. Consult
the local building and zoning department to determine
compliance in your area.
Earth Coupled Application Closed Loop
Earth coupled closed loop systems should follow the
same International Ground Source Heat Pump Association guidelines used for closed loop heat pump applications. Once piping is completed between the loop pump
kit and the earth loop, final purging and charging of the
loop is required. A flush/purge assembly capable of
obtaining a velocity of 2 fps throughout the entire system
is required. Usually a pump of at least 1.5 hp will be
adequate to purge air and dirt particles from the loop
itself for most residential systems. Commercial systems
must be sized carefully using pump manufacturer pump
curves and system specific data. Flush the system adequately to remove as much air as possible then pressurize the loop to a static pressure of 20 to 30 psi. This
is normally adequate for proper system operation. Check
for proper flow through the unit by checking pressure
drop across the heat exchanger and compare it to the
cooling and heating operating pressure tables on page
12. In order to achieve proper cooling capacity in a
earth coupled close loop application, a rate of 3 gpm per
ton is required. Antifreeze solutions are required when
low evaporating conditions are anticipated. Always use
pressure/temperature ports to provide proper fluid flow
rates.
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Applications
Typical Load Side Applications
There are many load side applications for which the fluid
to fluid liquid chiller heat pumps can be used. The most
popular used would include: Hydronic baseboard heating,
hydronic in-slab floor heating, forced air fan coil heating
or cooling, ice and snow removal, heating potable water,
heating swimming pools and spas, and process fluid heating and cooling. When specifying load side heat transfer
surface it is important to consider the heat pump output
capacities and fluid flow rates. Insufficient load side heat
transfer surface may cause unstable heat pump operating. Pressure/temperature ports should always be used to
determine load side flow rates. Avoid contact of dissimilar
metals in the load side piping system.
The units can provide heating or cooling for pools and
spas without the use of a secondary heat exchanger.
This application would however require a cupronickel
load side heat exchanger. Automatic chemical feeders
must never be installed upstream of the heat pump. An
external bypass should be installed to avoid over flowing
the heat exchanger which could cause erosion. Proper
pool PH levels and chemical balances must be maintained to avoid possible heat exchanger damage.
Start Up
Check before powering the unit
• Avoid starting any electrical equipment for the first
time alone, always have another person a safe distance from the unit that can turn off the main power in
the event of an accident
• High voltage supply matches the nameplate rating
• Field wire size, breakers and fuses are the correct size
• Low voltage control circuit is correct
• Water piping is complete and correct
• Closed loop system is flushed and purged
• Isolation valves are open
• Loop pumps are correctly wired
• Access panels are in place and secured
• Thermostat is in “off” position
Electric Shock Hazard.
Turn Off All Power
Before Servicing.
4. Check the cooling refrigerant pressures against
valves with the tables.
5. Turn thermostat switch to the “off” position. The unit will
stop running and the reversing valve should de-energize.
6. Leave unit “off” for approximately five minutes to allow pressure to equalize.
7. Adjust thermostat to lowest setting.
8. Set thermostat switch to “heat” position.
9. Slowly adjust thermostat to higher temperature until
compressor energizes.
10. Compare the heating refrigerant pressure with
valves with the tables.
11. Check for vibrations, noise, water leaks, etc.
12. Adjust thermostat to correct mode and set to maintain desired temperature.
13. Instruct the equipment owner/operator of correct
thermostat and system operation.
14. Be certain to complete and forward the warranty
papers to Daikin.
Maintenance Procedures
Proper maintenance is important to provide the most efficient operation and longest life for your equipment. The
following points are to serve as a general guide. Always
consult with your maintenance contractor with regard to
the specific requirements of your own installation.
Paint Finish
The electrodeposition paint finish may be polished if
desired. Spray paint is available in case of accidental
scratching or chipping.
The following should be checked only by a
competent contractor
Contactor Points
Check contactor points twice a year to see that they are
not burned or pitted as a result of low voltage, lightning
strikes, or other electrical difficulties.
Water System
The water circulating pump should be checked and
cleaned, so that it is operating normally. Clogged coils
lead to high head pressures and inefficient operation. If
coil is limed, a cleaning treatment may be necessary. Water coils should be checked yearly for liming or clogging.
Improper Unit Functioning
Check, Test and Start (Form on page 44)
1. Set thermostat to highest position.
2. Set thermostat switch to “cool”. Compressor should
not operate. The source water pump should energize.
3. Slowly lower the thermostat setting until the compressor is energized. Regulate the water flow utilizing the
P/T plugs and compare to the performance tables.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
If unit is not performing properly, several readings of
temperature, pressure and electrical characteristics
need to be taken. The normal required troubleshooting
information is listed on the Check, Test and Start Form
on page 44.
Notes:DO NOT place refrigeration gauges on system for
Check, Test and Start procedure. (To be used for major
service only.) To Installer: Fill out Check, Test and Start
Form on page 44 and leave copy with the customer.
8
www.DaikinApplied.com
Dimensional Data
WRA, WCA, WHA – Size 036-072
Dimensions - Size 036
Dimensions (in.)
Pipe Size (FPT)
Connection Size
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Control
Electric
Auxiliary
Electric
Load
Source
Domestic
Hot Water
28⅛
28⅛
19
1¾
6⅜
3⅞
2
11⅞
17⅛
4
1½
14⅞
10⅝
8⅝
1/2" KO
3/4" KO
1/2" KO
3/4" FPT
1/2" FPT
Dimensions - Size 048–060
Dimensions (in.)
Pipe Size (FPT)
Connection Size
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Control
Electric
Auxiliary
Electric
Load
Source
Domestic
Hot Water
28⅛
28⅛
21
2¼
7½
3⅞
2
13¾
19
4
1½
14⅞
10⅝
8⅝
1/2" KO
3/4" KO
1/2" KO
1" FPT
1/2" FPT
Dimensions - Size 072
Dimensions (in.)
Pipe Size (FPT)
Connection Size
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Control
Electric
Auxiliary
Electric
Load
Source
Domestic
Hot Water
35⅛
28⅛
21
911/16
10⅝
10⅝
2
12¼
19
4
1½
14⅞
10⅝
8⅝
1/2" KO
3/4" KO
1/2" KO
1" FPT
1/2" FPT
www.DaikinApplied.com
9
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Dimensional Data
WRA, WCA, WHA – Size 120-180
Dimensions - Size 120 – 150
Dimensions (in.)
A
26¼
B
19½
C
12¼
D
E
4½
8⅜
F
G
22¼
4⅜
H
18¾
Water Connection Size
K
L
41
22⅛
M
34
N
1
P
13
1 /16
Q
R
S
Load Source FPT
37
29¾
42
1½"
Dimensions - Size 180
Dimensions (in.)
Water Connection Size
A
B
C
D
E
F
G
H
K
L
M
N
P
Q
R
S
Load Source FPT
29
19½
14
4½
8⅜
21½
4⅜
18¾
41
22⅛
34
1
113/16
37
29¾
42
2"
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP10
www.DaikinApplied.com
Dimensional Data
WRA, WCA, WHA – Size 240-420
Dimensions - Size 240 – 420
Dimensions (in.)
A
B
C
D
31⅜
19⅜
14⅜
2⅜
www.DaikinApplied.com
E
24
F
K
L
24
63⅛
22⅛
Water Connection Size
M
34
N
1
11
P
13
1 /16
Q
R
S
Load Source FPT
52⅛
44⅛
50
2"
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Engineering Data
Physical Data
Table 3: WRA, WHA, WCA 036 – 420
Cabinet Dimensions (in.)
Unit Weight (lb.)
Width
Depth
Height
Operating
Shipping
Factory Refrigerant
Charge Per Cicuit (lb.)
28.125
28.125
28.125
35.125
34.00
34.00
34.00
34.00
34.00
34.00
34.00
28.125
28.125
28.125
28.125
42.00
42.00
42.00
50.00
50.00
50.00
50.00
19.00
21.00
21.00
21.00
41.00
41.00
41.00
63.125
63.125
63.125
63.125
250
297
302
320
570
735
900
1040
1130
1420
1620
259
300
505
370
610
770
950
1140
1230
1540
1750
2.80
3.50
4.40
5.00
2.75/2.75
4.25/4.25
8.00/8.00
10.0/10.0
16.0/16.0
17.5/17.5
20.0/20.0
Unit Size
036
048
060
072
120
150
180
240
300
360
420
Water Connections (in.)
0.75
1.00
1.00
1.00
1.50
1.50
2.00
2.00
2.00
2.00
2.00
FPT
Operating Pressures (PSIG)
Cooling Mode
Table 4: Models WRA and WCA
Entering Source Temperature °F
Leaving Load °F
50
70
90
Suction
Discharge
Suction
Discharge
Suction
Discharge
90-109
210-250
95-110
270-310
98-115
355-395
50
97-114
215-255
100-115
280-315
105-123
365-410
55
106-123
220-265
110-125
285-320
118-135
385-420
45
Heating Mode
Table 5: Models WRA and WHA
Entering Source Temperature °F
Entering
Load °F
30
50
70
90
Suction
Discharge
Suction
Discharge
Suction
Discharge
Suction
Discharge
80
63-87
275-318
85-110
295-332
115-138
325-365
138-162
365-400
100
66-90
375-410
90-114
398-435
120-143
420-455
145-170
445-490
120
66-90
503-542
92-115
515-556
123-145
530-570
153-175
555-600
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP12
www.DaikinApplied.com
Engineering Data
Antifreeze Correction
Heating Capacity
Cooling Capacity
Antifreeze
Pessure Drop
Load
Source
Load
Source
Type
Percent
90°F EWT
30°F EWT
45°F EWT
90°F EWT
30°F EWT
Water
0
1.000
1.000
1.000
1.000
1.000
10
0.991
0.973
0.975
0.991
1.075
20
0.979
0.943
0.946
0.979
1.163
30
0.965
0.917
0.920
0.965
1.225
40
0.955
0.890
0.895
0.955
1.324
50
0.943
0.865
0.870
0.943
1.419
10
0.981
0.958
0.959
0.981
1.130
20
0.969
0.913
0.919
0.969
1.270
30
0.950
0.854
0.866
0.950
1.433
40
0.937
0.813
0.829
0.937
1.614
50
0.922
0.770
0.789
0.922
1.816
Ethylene Glycol
Propylene Glycol
Methanol
Ethanol
10
0.986
0.957
0.961
0.986
1.127
20
0.970
0.924
0.928
0.970
1.197
30
0.951
0.895
0.897
0.951
1.235
40
0.936
0.863
0.865
0.936
1.323
50
0.920
0.833
0.835
0.920
1.399
10
0.991
0.927
0.941
0.991
1.242
20
0.972
0.887
0.901
0.972
1.343
30
0.947
0.856
0.866
0.947
1.383
40
0.930
0.815
0.826
0.930
1.523
50
0.911
0.779
0.791
0.911
1.639
= Operation in the shaded areas should be avoided as antifreeze solutions greater than 35% will result in extreme
perrformance reductions.
Waterflow Correction
Flow
Load
Source
www.DaikinApplied.com
Heating
Cooling
GPM/Ton
Tons
kW
Tons
kW
1.2
0.982
1.040
0.970
1.044
1.8
0.990
1.022
0.983
1.024
2.4
1.000
1.000
1.000
1.000
1.5
0.973
1.042
0.984
1.038
2.3
0.987
1.021
0.993
1.019
3.0
1.000
1.000
1.000
1.000
13
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
208-230/60/1, Unit Sizes 036, 048, 060
Note: See wiring diagram legend on page 15.
2
CC
L2
1
L2
1
3
L1
4
GR
T2
CC
L1
R-14
EGL
7
8
9
10
11
F2
BK-
HRPR
R
4
WIRE SIZE TABLE
* COMPRESSOR
UNIT
WIRE SIZE (AWG)
MODEL
036
048
060
072
R
PM
5
R
4
8
1
Y
Y
24V
CHR
Y
4
CC-A
Y
2
SPLICE
20
25
PCT
TS-H
TB1
S
(WHEN USED)
PK
10
JUMPER
(WWR ONLY)
OFF
Y
COOL
C
NO
STG2
HRPR
1
C
NO
G
CCH
BR
4
BR
SENSOR 2
TC
24
COM
BR
(OPTIONAL)
JUMPER (WWR ONLY)
(OPTIONAL)
TB3
LP2
PR
(OPTIONAL)
HP
BK
FS-S
(OPTIONAL)
15 LTC
COM1 NO1
BL
(OPTIONAL)
31
O
Y
PK
BK
BL
Y
CC
LPS
W
R
35
PR
T
C
R
1,3,17
DOM
6 SEC
3 SEC
W
34
T1
R
P7
P8
P9
33
HPS
CCM
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
Y
32
LP1
O
LPR-AL1701
29
7
P10
P11
P12
FS-L
12
TB3
BR
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
BR
ASC
6
14
Y
30
3
LTC
24 VAC
5 MIN
10 SEC
TB1
Y
28
PM
(OPTIONAL)
(WHEN USED)
(OPTIONAL)
R
13
27
X
36
FL
SPLICE
R
37
(WHEN REQ’D)
BR
(OPTIONAL)
38
Y
39
40
41
16
42
TB1
O
17
BK
1
BR
BL
G-14
18
IR
CHR
3
3
TB2
A1
PR
A2
PR
BR
BR
46
BR
SPLICE
15
(WHEN REQ’D)
SPLICE
44
45
1
(WHEN USED)
TB1
C
43
47
G
BK
SEN 1 SEN 2
SENSOR 1
11
STG1
TC
7
R
(WHEN REQ’D)
26
46
PR
(WHEN USED)
HEAT
3 (L1)
CL
(WHEN REQ’D)
19
COOL
4 (L2)
BK
(WHEN USED)
SPLICE
BK
TS-C
R-14
BK-14
BL
RVS
6
BK
18
9
GR
(OPTIONAL)
SPLICE
75 VA
CLASS 2
50/60 HZ
TR
3
SPLICE
17
OFF
WHR
T1
SPLICE when necessary
16
24
5
SPLICE when necessary
R
HEAT
T2
2
R-14
TB1
8
REMOTE SWITCH
T1
4
BK-14
15
23
TB4
R
BK
LINE
VOLTAGE
14
22
*
TB4
BK-14
CM
T2
R-14
12
12
10
8
13
T3
(WHEN USED)
12
21
WTL
R
2
F1
BK-14
*
BL-14
(WHEN USED)
5
6
T1
R-
RC
BL-14
IR
4
2
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP14
WIRING DIAGRAM # 0962I-2631B, REV.B
WW* 036, 048, 060, 072
SINGLE PHASE
www.DaikinApplied.com
Wiring Diagram
Legend
208-230/60/1, Unit Sizes 036, 048, 060
LEGEND
FUNCTIONAL
LINE
DESCRIPTION
DESIGNATION NUMBER
CL
17
OPTIONAL INDICATOR LIGHT - COMPRESSOR ON
CC
32
COMPRESSOR CONTACTOR
CCH
10
CRANKCASE HEATER
CCM
26
COMPRESSOR CONTROL MODULE
CHR
41
CHANGEOVER RELAY (WHEN USED)
CM
2
COMPRESSOR
EGL
4
EQUIPMENT GROUNDING LUG(S)
F1,F2
6,4
FUSING (WHEN USED) - SEE FUSE TABLE
FL
37
OPTIONAL INDICATOR LIGHT - FAULT
FS-L
28
OPTIONAL FLOW PROVING SWITCH – LOAD COIL
FS-S
28
OPTIONAL FLOW PROVING SWITCH – SOURCE COIL
HP
30
HIGH DISCHARGE PRESSURE CUTOUT SWITCH
HRPR
18
HEAT RECOVERY PUMP RELAY (WHEN USED)
IR
39
INTERLOCK RELAY
LP1
30
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 1
LP2
26
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 2
LTC
20,30
LOW FLUID TEMPERATURE CUTOUT MODULE
PCT
18
WASTE HEAT RECOVERY PUMP CONTROL THERMOSTAT (WHEN USED)
PM
8,14
OPTIONAL POWER MONITOR
RC
2
MOTOR RUN CAPACITOR
RVS
15
REVERSING VALVE SOLENOID (WHEN USED)
TB1
+
TERMINAL BOARD NO. 1
TB2
46,47
TERMINAL BOARD NO. 2
TB3
26
TERMINAL BOARD NO. 3
TB4
4,6
TERMINAL BOARD NO. 4 (WHEN USED)
TR
13
CONTROL TRANSFORMER
TC
23
TEMPERATURE CONTROLLER (OPTIONAL)
TS-C
23
AQUASTAT – COOLING (WHEN USED)
TS-H
22
AQUASTAT – HEATING (WHEN USED)
WHR
5
OPTIONAL WASTE HEAT RECOVERY PUMP
WTL
4
WATER TEMPERATURE LIMIT THERMOSTAT (WHEN USED)
# SEE LINE NUMBER TO THE RIGHT OF CONTACTOR COIL ON WIRING DIAGRAM.
+ MULTIPLE LINE NUMBERS.
FUSE NO.
F1,F2
CLASS
CC
FUSE TABLE
VOLTS AC AMPERES
1.5
600
WIRE COLOR LEGEND
BK: BLACK
PK: PINK
BL: BLUE
PR: PURPLE
BR: BROWN
R:
RED
G:
GREEN
W: WHITE
O:
ORANGE
Y:
YELLOW
NOTES:
NUMBER PLACED AFTER DASH FOLLOWING
COLOR CODE INDICATES WIRE GAGE. FOR
EXAMPLE> BK-12 IS A BLACK, 12 AWG WIRE.
NO NUMBER AFTER COLOR CODE
INDICATES 18 AWG WIRE. FOR EXAMPLE>
BK IS A BLACK 18 AWG WIRE.
ASTERISK AFTER DASH FOLLOWING COLOR
CODE INDICATES REFERRAL TO
COMPRESSOR WIRE SIZE TABLE.
SYMBOL LEGEND
FACTORY WIRING
OPTIONAL FACTORY WIRING
FIELD WIRING
OPTIONAL FIELD WIRING
EARTH GROUND
CHASSIS (PANEL) GROUND
TERMINAL BOARD NO. 1 (TB1)
TERMINAL BOARD NO. 2 (TB2)
TERMINAL BOARD NO. 3 (TB3)
TERMINAL BOARD NO. 4 (TB4)
TIME DELAY
YES
COIL
NORMALLY OPEN CONTACTS
NORMALLY CLOSED CONTACTS
IDENTIFIABLE TERMINAL
NON-IDENTIFIABLE TERMINAL,
OTHER WIRE JUNCTIONS,
INCLUDING SCHEMATIC
1
FIELD POWER SUPPLY PER UNIT RATING PLATE. MINIMUM CIRCUIT AMPACITY AND
MAXIMUM SIZE OF TIME-DELAY FUSE OR HACR-TYPE CIRCUIT BREAKER PER UNIT
RATING PLATE. PROVIDE DISCONNECTING MEANS AND EQUIPMENT GROUNDING AS
REQUIRED.
2
HEAT RECOVERY OPTION:
FIELD INSTALLED WASTE HEAT RECOVERY PUMP WIRING. USE 14 AWG, 75C
CONDUCTORS MINIMUM . COMPLY WITH LOCAL CODES WHICH MAY REQUIRE
LARGER SIZE WIRING. INSTALL ADDITIONAL DISCONNECTING MEANS WHERE
REQUIRED TO COMPLY WITH ELECTRICAL CODE. THIS EQUIPMENT MUST BE
PERMANENTLY GROUNDED IN ACCORDANCE WITH ELECTRICAL CODE. TERMINAL
BOARD “TB4” IS RATED FOR BOTH 14 AND 12 AWG WIRE SIZES.
THE FOLLOWING COMPONENTS ARE USED ONLY WHEN WASTE HEAT RECOVERY
(DESUPERHEATER) OPTION IS FURNISHED: “F1”, “F2”, “HRPR”, “PCT”, “TB4”, “WHR”,
AND “WTL”. “WHR” IS ORDERED SEPARATELY FOR FIELD INSTALLATION.
3
9
AQUASTATS “TS-H” AND “TS-C” ARE NOT USED WHEN OPTIONAL FACTORY INSTALLED
TEMPERATURE CONTROLLER “TC” IS FURNISHED. TYPICAL AQUASTATS SHOWN.
AQUASTATS MAY BE SUPPLIED BY OTHERS OR ARE AVAILABLE AS AN OPTIONAL
ACCESSORY FROM THE FACTORY. MINIMUM PILOT DUTY RATING OF EACH POLE OF
AQUASTAT IS 24 VOLT-AMPERES @ 24 VOLTS AC WHEN CONNECTED AS SHOWN.
10 THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S TO TERMINAL Y ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
11 WHEN OPTIONAL TEMPERATURE CONTROLLER “TC” IS FURNISHED, INSTALLER MUST
PROGRAM CONTROLLER. REFER TO TEMPERATURE CONTROL INSTALLATION
INSTRUCTIONS.
WITH REVERSE-CYCLE WWR UNITS, PROGRAM CONTROLLER AS ONE STAGE
COOLING AND ONE STAGE HEATING. STAGE 1 IS THE COOLING STAGE AND STAGE 2 IS
THE HEATING STAGE.
INSTALL SENSOR @ WATER INLET PIPE (LOAD).
TRANSFORMER MAY HAVE TAPS FOR 120V, 208V, 240V, OR 480V SYSTEM POWER
SUPPLY. BEFORE APPLYING POWER TO THE UNIT, ENSURE TRANSFORMER IS WIRED
FOR APPROPRIATE SYSTEM POWER SUPPLY. INSULATE SEPARATELY ANY UNUSED
LEADS. POLARITY IS NOT INDICATED. TYPICAL TRANSFORMER SHOWN. SEE
TRANSFORMER LABEL FOR LEAD COLOR CODING.
12 SEE FIGURE 2 ON SHEET 3 OF THIS DRAWING FOR COMPRESSOR CONTROL MODULE
OPERATION.
13
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 6 TO TERMINAL 7 ON "TB3".
4
WHEN “PM” IS NOT USED, THIS WIRE CONNECTS DIRECTLY TO TERMINAL R ON “TB1”.
14
5
IF POWER MONITOR OUTPUT CONTACTS DO NOT TRANSFER WHEN POWER IS APPLIED
TO UNIT (BICOLOR LED GLOWS GREEN UNDER NORMAL CONDITIONS AND RED
DURING FAULT CONDITIONS):
1. VERIFY THAT ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT
VOLTAGE. IF ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT VOLTAGE,
PHASE ROTATION MAY BE INCORRECT. PERFORM STEP 2.
2. DISCONNECT POWER TO THE WW* UNIT. VERIFY THAT POWER IS IN FACT
DISCONNECTED. SWAP ANY TWO OF THE THREE UNIT POWER SUPPLY WIRES. WHEN
POWER IS REAPPLIED, OUTPUT CONTACTS SHOULD NOW TRANSFER.
WHEN “FS-L” AND “FS-S” ARE NOT USED, THIS WIRE CONNECTS DIRECTLY TO
TERMINAL Y OF “CCM”.
6
“RVS” IS USED ONLY WITH WWR MODELS AND IS ENERGIZED IN COOLING MODE (LOAD
COIL IS HEAT SOURCE, SOURCE COIL IS HEAT SINK).
“RVS” IS NOT USED WITH WWC AND WWH MODELS.
7
SEE FIGURE 1 ON SHEET 3 OF THIS DRAWING FOR BOARD LAYOUT, SENSOR
LOCATIONS, TEMPERATURE SETTING NOTE, AND SENSOR RESISTANCE VERSUS
TEMPERATURE GRAPH.
8
TYPICAL FIELD CONTROL WIRING SHOWN. ACTUAL FIELD WIRING MAY DIFFER FROM
WIRING SHOWN HERE. USE 18 AWG MINIMUM FOR FIELD 24 VOLT CONTROL WIRING.
TYPICAL REMOTE SWITCH SHOWN. REMOTE SWITCH MAY BE SUPPLIED BY OTHERS
OR IS AVAILABLE AS AN OPTIONAL ACCESSORY FROM THE FACTORY. MINIMUM PILOT
DUTY RATING OF EACH POLE OF REMOTE SWITCH IS 24 VOLT-AMPERES @ 24 VOLTS
AC WHEN CONNECTED AS SHOWN.
www.DaikinApplied.com
15
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
16
CONDUCTOR “O” REQUIRED WITH WWR REVERSE CYCLE UNITS.
CONDUCTOR “O” NOT USED WITH WWC COOLING AND WWR HEATING UNITS.
17
“CHR” IS USED ONLY WITH “WWR” UNITS.
“CHR” IS NOT USED WITH “WWC” AND “WWH” UNITS.
18
INTERLOCK RELAY CONTACTS ARE PROVIDED TO OPERATE AN EXTERNAL PILOT DUTY
LOAD (SUCH AS A PUMP RELAY COIL) WITH A CALL FOR COMPRESSOR.
AN EXTERNAL LOAD POWERED BY TRANSFORMER “TR” IN THE WW* UNIT MUST
NOT EXCEED 12 VA SEALED (96 VA INRUSH) @ 24 VOLTS AC.
EXTERNAL LOADS POWERED FROM AN EXTERNAL SOURCE ARE LIMITED TO
CLASS 2 CIRCUITS ONLY (30 VOLTS AC MAXIMUM). EXTERNAL LOAD
CHARACTERISTICS MUST NOT EXCEED 10 AMPS MAKE, 1 AMP BREAK. MAINTAIN
SEPARATION BETWEEN CLASS 2 CIRCUITS OF DIFFERENT SOURCES.
PROVIDE DISCONNECTING MEANS, EQUIPMENT GROUNDING, AND
OVERCURRENT PROTECTION AS REQUIRED.
WIRING DIAGRAM # 0962I-2631B, REV.B
WW* 036, 048, 060, 072
SINGLE PHASE
15
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Control
relays until the temperature of the sensor is 2.5 degrees
above the selected temperature. For example, you set
the temperature to 20°F. The output relays will de-energize when the sensor temperature drops below 20°F.
The control will re-energize the output relays when the
sensor temperature rises above 22.5°F. Additionally, the
control will monitor each individual sensor to make sure
it isn't broken or shorted. If either Sensor 1 or Sensor 2
fails short or open before or during operation, the control
will de-energize both output relays until the sensor is
repaired or replaced.
Optional Low Temperature Control
Board "LTC" – 208-230/60/1, Unit
Sizes 036, 048, 060
The control board is powered by 24 volts AC, 50/60 hertz
which is applied to the 24 VAC terminals. The control will
energize the output relays (COM 1 makes connection
with NO 1 and COM 2 makes connection with NO 2), only
if the temperatures of both Sensor 1 and Sensor 2 are
above the selected temperature which is 20°F or 35°F.
Note: Always disconnect power to WW* unit before moving
jumpers.
Table 6: LTC board sensor locations
While the output relays are energized, the control keeps
monitoring Sensor 1 and Sensor 2 to make sure that the
temperature of the sensors is always above the selected
temperture, the control will de-energize both ouput
Model
Sensor 1
Sensor 2
WCA
Liquid Out - Load Coil
Liquid Out - Source Coil
WHA
Liquid Out - Load Coil
Liquid Out - Source Coil
WRA
Liquid Out - Load Coil
Liquid Out - Source Coil
Figure 1: "LTC" board jumper settings
AL7815
NO 2
DISCONNECT POWER TO
WW* UNIT BEFORE MOVING
JUMPERS
COM 2
NO 1
COM 1
35F
20F
24 VAC
35F
20F
S2
SEN 1
The 20˚F settings are used only on
closed loop systems with antifreeze
solution.
S1
Jumper “S1” selects cutout temperature
setpoint for Sensor “SEN 1”.
Jumper “S2” selects cutout temperature
setpoint for Sensor “SEN 2”.
SEN 2
Figure 2: Thermistor temperature vs. resistance graph
Thermistor Temperature Vs. Resistance
Resistance (OHMS)
70000
60000
50000
40000
30000
20000
10000
0
10
20
30
40
50
60
70
80
90
100
110
Temperature (ºF)
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
16
www.DaikinApplied.com
Control
Operation Of The LPS Terminals
Compressor Control Module
Functional Operation
208-230/60/1, Unit Sizes 036, 048,
060
Power:
For proper operation there must always be 18 to 30 volts
AC present at the R and C terminals.
Time Delays:
1. Anti-short cycle: provides the compressor with short
cycle protection for a selectable time of 10 seconds
(for servicing only) or 5 minutes (normal operationalsetting). This feature is enabled upon power loss to
the circuit board, loss of the Y signal, or the opening
of a switch connected to the HPS or LPS terminals. If
the selecto shunt is not in place, the circuit will default
to a 5 minute anti short-cycle delay.
2. Delay on make: Delays the turning on of the
compressor contactor for a selectable time of 3 or 6
seconds every time the Y signal coalls. If the selector shunit is not in place, the circuit will default to a 6
second delay on make.
3. Low Pressure Bypass: Allows time for the low side
pressure to build up enough pressure at start up for
the 60 psig low pressure switch to close. The circuit
will offer a selectable timing range of 90, 120, 180,
or 300 seconds. This time delay will start upon a
Y call from the thermostat. Should the 60 psig low
pressure switch still be open after the selected delay
expires, the compressor will de-energize and the
alarm will energize. This will be defined as an LPS
fault, (factory set for 90 seconds). If necessary to
increase the delay, select the smallest amount of bypass time delay that allows the compressor to start
and operate.
Note: The 60 psig low pressure switch is jumpered out in low
temperature closed loop system applications using
antifreeze solution.
Also note tht the 35 psig low pressure switch is connected in series with the high pressure switch to the
HPS terminals and is never bypassed.
The 60 psig low pressure switch (brown leads) is connected to the LPS terminals in series with the Y signal
through the circuit board. The 60 psig low pressure
switch is connected in series with the Y signal to the processor only. This will allow the control to monitor the low
pressure switch status and initiate the bypass delay. If
the 60 psig low pressure switch should open, the status
LED will blink twice.
Normal Cycle
A normal cycle will begin with 24 VAC applied to the R
and C terminals on the circuit board. Once the control
is powered up, the processor will read the Y signal to
determine if it is calling. If it is calling and the switches
connected to the HPS terminals are closed, the delay on
make and low pressure bypass timers will initiate.
If a switch connected to the HPS terminals is open, the
control will enter the lockout mode. After the delay on
make time expires, the compressor contactor will energize. It will remain energized as the low pressure bypass
timer counts down.
If the 60 psig low pressure switch is closed after the
timer expires, the compressor will remain energized. If it
is still open, the control will enter the lockout mode.
If power is lost, or the Y signal is removed, or an HPS or
LPS terminal switch fault is detected while the compressor contactor is energized, the unit will initiate the anti
short-cycle delay.
Alarm/Lockout
The alarm terminal will output the R signal and will only
be energized as a result of an HPS or LPS fault. An HPS
fault is defined as the opening of a switch connected to
the HPS terminals for any amount of time. An LPS fault
is defined as the 60 psig low pressure switch open after
the bypass time. If any of these conditions are true, the
unit will de-energize the compressor and energize the
alarm. This will be defined as a lockout condition. To
reset a lockout condition, the pressure fault must be
corrected and the Y signal from the thermostat must be
cycled.
Operation Of The HPS Terminals
Switches connected to the HPS terminals are connected
in series with the Y signal through the circuit board.
These switches are also connected in series witht the
T1 output in order to provide an immediate response if
a switch were to open. If a switch conncecte to the HPS
terminal should open, the status LED will blink once.
www.DaikinApplied.com
17
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Control
Figure 3: Compressor control module functional operation
10 SEC jumper is for servicing unit only.
Do not operate unit unattended with
jumper in the 10 second position!
R
LPR-AL1701
T1
T
Disconnect power to
WW* unit before moving
jumpers!
DOM
6 SEC
3 SEC
X
Status LED
P7
P8
P9
R
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
C
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
P10
P11
P12
Y
HPS
ASC
5 MIN
10 SEC
LPS
The delay on make timer is
factory set to 3 seconds
Use lowest LPS bypass time
setting which allow unit to start and
operate. Do not set the jumper any
higher than necessary.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP18
www.DaikinApplied.com
Wiring Diagram
208-230/60/3, Unit Sizes 036, 048, 060 and 072
Note: See wiring diagram legend on page 20.
2
CC
L3
1
L2
1
3
L1
4
GR
EGL
L3
T3
L2
T2
L1
R-14
T1
7
8
9
10
11
F2
*
R
PM
5
R
4
8
1
SPLICE
Y
Y
4
CC-A
BK
2
SPLICE
20
25
TS-H
S
COOL
HEAT
(WHEN USED)
PK
JUMPER
(WWR ONLY)
OFF
Y
COOL
C
NO
STG2
PCT
PR
G
BK
HRPR
C
NO
1
SENSOR 2
TC
(OPTIONAL)
24
COM
BR
LP2
FS-L
PR
(OPTIONAL)
HP
BK
FS-S
(OPTIONAL)
15 LTC
COM1 NO1
BL
(OPTIONAL)
31
LP1
O
O
Y
PK
BK
BL
Y
CC
LPS
W
R
35
PR
T
C
R
1,2,3,17
DOM
6 SEC
3 SEC
34
T1
R
P7
P8
P9
33
W
HPS
CCM
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
Y
32
7
LPR-AL1701
29
12
TB3
BR
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
Y
BR
ASC
6
14
30
BR
P10
P11
P12
Y
4
LTC
5 MIN
10 SEC
TB1
28
BR
JUMPER (WWR ONLY)
TB3
13
27
3
(OPTIONAL)
(OPTIONAL)
26
BL
(WHEN USED)
SEN 1 SEN 2
R
CCH
BK
24 VAC
SENSOR 1
11
STG1
TC
7
R
(WHEN REQ’D)
10
PM
(OPTIONAL)
G
SPLICE
(WHEN USED)
(WHEN USED)
TB1
3 (L1)
CL
(WHEN REQ’D)
19
TS-C
T1
5 (L3)
RVS
6
SPLICE
BK
9
G-14
CLASS 2
50/60 HZ
24V
CHR
Y
18
OFF
(OPTIONAL)
WHR
2
4 (L2)
TR
3
Y
HEAT
TB4
5
T2
R-14
17
24
(WHEN USED)
BK-14
16
8
REMOTE SWITCH
CM
T1
R
Splice when PM is used
BK-14
R
15
4
BL-14
TB1
14
23
R
2
T2
Splice when PM is used
LINE
VOLTAGE
13
22
4
BK
R-14
COMPRESSOR WIRE SIZE TABLE
UNIT
WIRE SIZE (AWG)
MODEL
208-230
380/460 VOLT
VOLT
036
14
14
048
14
14
060
12
14
072
10
14
12
21
HRPR
R
F1
BK-14
6
T3
BL-
(WHEN USED)
5
*
*
BK*TB4
WTL
R-
X
36
FL
SPLICE
R
37
(WHEN REQ’D)
BR
(OPTIONAL)
38
Y
39
40
41
16
42
TB1
O
17
BK
1
IR
CHR
3
3
BR
BR
(WHEN USED)
TB1
C
43
1
BR
BL
G-14
46
BR
SPLICE
15
(WHEN REQ’D)
SPLICE
44
45
46
47
18
www.DaikinApplied.com
TB2
A1
PR
A2
PR
WIRING DIAGRAM
WW* 036, 048, 060, 072
THREE PHASE
0962I-2632, REV.B
IR
4
2
19
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
Legend
208-230/60/3, Unit Sizes 036, 048, 060 and 072
LEGEND
FUNCTIONAL
LINE
DESCRIPTION
DESIGNATION NUMBER
CL
17
OPTIONAL INDICATOR LIGHT - COMPRESSOR ON
CC
32
COMPRESSOR CONTACTOR
CCH
10
CRANKCASE HEATER
CCM
26
COMPRESSOR CONTROL MODULE
CHR
41
CHANGEOVER RELAY (WHEN USED)
CM
2
COMPRESSOR
EGL
4
EQUIPMENT GROUNDING LUG(S)
F1,F2
6,4
FUSING (WHEN USED) - SEE FUSE TABLE
FL
37
OPTIONAL INDICATOR LIGHT - FAULT
FS-L
28
OPTIONAL FLOW PROVING SWITCH – LOAD COIL
FS-S
28
OPTIONAL FLOW PROVING SWITCH – SOURCE COIL
HP
30
HIGH DISCHARGE PRESSURE CUTOUT SWITCH
HRPR
18
HEAT RECOVERY PUMP RELAY (WHEN USED)
IR
39
INTERLOCK RELAY
LP1
30
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 1
LP2
26
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 2
LTC
20,30
LOW FLUID TEMPERATURE CUTOUT MODULE
PCT
18
WASTE HEAT RECOVERY PUMP CONTROL THERMOSTAT (WHEN USED)
PM
8,14
OPTIONAL POWER MONITOR
RVS
15
REVERSING VALVE SOLENOID (WHEN USED)
TB1
+
TERMINAL BOARD NO. 1
TB2
46,47
TERMINAL BOARD NO. 2
TB3
26
TERMINAL BOARD NO. 3
TB4
4,6
TERMINAL BOARD NO. 4
TR
13
CONTROL TRANSFORMER
TC
23
TEMPERATURE CONTROLLER (OPTIONAL)
TS-C
23
AQUASTAT – COOLING (WHEN USED)
TS-H
22
AQUASTAT – HEATING (WHEN USED)
WHR
5
OPTIONAL WASTE HEAT RECOVERY PUMP
WTL
4
WATER TEMPERATURE LIMIT THERMOSTAT (WHEN USED)
# SEE LINE NUMBER TO THE RIGHT OF CONTACTOR COIL ON WIRING DIAGRAM.
+ MULTIPLE LINE NUMBERS.
FUSE TABLE
FUSE NO.
CLASS VOLTS AC AMPERES TIME DELAY
1
F1,F2
+
250
NO
+ SUPPLEMENTARY TYPE; USE FERRAZ SHAWMUT
CATALOG NO. OTM 1.
1
FIELD POWER SUPPLY PER UNIT RATING PLATE. MINIMUM CIRCUIT AMPACITY AND
MAXIMUM SIZE OF TIME-DELAY FUSE OR HACR-TYPE CIRCUIT BREAKER PER UNIT
RATING PLATE. PROVIDE DISCONNECTING MEANS AND EQUIPMENT GROUNDING AS
REQUIRED.
2
THE FOLLOWING COMPONENTS ARE USED ONLY WHEN WASTE HEAT RECOVERY
(DESUPERHEATER) OPTION IS FURNISHED: “F1”, “F2”, “HRPR”, “PCT”, “WHR”, AND “WTL”.
3
TRANSFORMER MAY HAVE TAPS FOR 120V, 208V, 240V, OR 480V SYSTEM POWER
SUPPLY. BEFORE APPLYING POWER TO THE UNIT, ENSURE TRANSFORMER IS WIRED
FOR APPROPRIATE SYSTEM POWER SUPPLY. INSULATE SEPARATELY ANY UNUSED
LEADS. POLARITY IS NOT INDICATED. TYPICAL TRANSFORMER SHOWN. SEE
TRANSFORMER LABEL FOR LEAD COLOR CODING.
4
WHEN “PM” IS NOT USED, THIS WIRE CONNECTS DIRECTLY TO TERMINAL R ON “TB1”.
5
IF POWER MONITOR OUTPUT CONTACTS DO NOT TRANSFER WHEN POWER IS APPLIED
TO UNIT (BICOLOR LED GLOWS GREEN UNDER NORMAL CONDITIONS AND RED
DURING FAULT CONDITIONS):
1. VERIFY THAT ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT
VOLTAGE. IF ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT VOLTAGE,
PHASE ROTATION MAY BE INCORRECT. PERFORM STEP 2.
2. DISCONNECT POWER TO THE WW* UNIT. VERIFY THAT POWER IS IN FACT
DISCONNECTED. SWAP ANY TWO OF THE THREE UNIT POWER SUPPLY WIRES. WHEN
POWER IS REAPPLIED, OUTPUT CONTACTS SHOULD NOW TRANSFER.
6
“RVS” IS USED ONLY WITH WWR MODELS AND IS ENERGIZED IN COOLING MODE (LOAD
COIL IS HEAT SOURCE, SOURCE COIL IS HEAT SINK).
“RVS” IS NOT USED WITH WWC AND WWH MODELS.
7
SEE FIGURE 1 ON SHEET 2 OF THIS DRAWING FOR BOARD LAYOUT, SENSOR
LOCATIONS, TEMPERATURE SETTING NOTE, AND SENSOR RESISTANCE VERSUS
TEMPERATURE GRAPH.
8
TYPICAL FIELD CONTROL WIRING SHOWN. ACTUAL FIELD WIRING MAY DIFFER FROM
WIRING SHOWN HERE. USE 18 AWG MINIMUM FOR FIELD 24 VOLT CONTROL WIRING.
TYPICAL REMOTE SWITCH SHOWN. REMOTE SWITCH MAY BE SUPPLIED BY OTHERS
OR IS AVAILABLE AS AN OPTIONAL ACCESSORY FROM THE FACTORY. MINIMUM PILOT
DUTY RATING OF EACH POLE OF REMOTE SWITCH IS 24 VOLT-AMPERES @ 24 VOLTS
AC WHEN CONNECTED AS SHOWN.
9
AQUASTATS “TS-H” AND “TS-C” ARE NOT USED WHEN OPTIONAL FACTORY INSTALLED
TEMPERATURE CONTROLLER “TC” IS FURNISHED. TYPICAL AQUASTATS SHOWN.
AQUASTATS MAY BE SUPPLIED BY OTHERS OR ARE AVAILABLE AS AN OPTIONAL
ACCESSORY FROM THE FACTORY. MINIMUM PILOT DUTY RATING OF EACH POLE OF
AQUASTAT IS 24 VOLT-AMPERES @ 24 VOLTS AC WHEN CONNECTED AS SHOWN.
WIRE COLOR LEGEND
BK: BLACK
PK: PINK
BL: BLUE
PR: PURPLE
BR: BROWN
R:
RED
G:
GREEN
W: WHITE
O:
ORANGE
Y:
YELLOW
NOTES:
NUMBER PLACED AFTER DASH FOLLOWING
COLOR CODE INDICATES WIRE GAGE. FOR
EXAMPLE> BK-12 IS A BLACK, 12 AWG WIRE.
NO NUMBER AFTER COLOR CODE
INDICATES 18 AWG WIRE. FOR EXAMPLE>
BK IS A BLACK 18 AWG WIRE.
ASTERISK AFTER DASH FOLLOWING COLOR
CODE INDICATES REFERRAL TO
COMPRESSOR WIRE SIZE TABLE.
SYMBOL LEGEND
FACTORY WIRING
OPTIONAL FACTORY WIRING
FIELD WIRING
OPTIONAL FIELD WIRING
EARTH GROUND
CHASSIS (PANEL) GROUND
TERMINAL BOARD NO. 1 (TB1)
TERMINAL BOARD NO. 2 (TB2)
TERMINAL BOARD NO. 3 (TB3)
COIL
NORMALLY OPEN CONTACTS
NORMALLY CLOSED CONTACTS
IDENTIFIABLE TERMINAL
NON-IDENTIFIABLE TERMINAL,
OTHER WIRE JUNCTIONS,
INCLUDING SCHEMATIC
10 THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S TO TERMINAL Y ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
11 WHEN OPTIONAL TEMPERATURE CONTROLLER “TC” IS FURNISHED, INSTALLER MUST
PROGRAM CONTROLLER. REFER TO TEMPERATURE CONTROL INSTALLATION
INSTRUCTIONS.
WITH REVERSE-CYCLE WWR UNITS, PROGRAM CONTROLLER AS ONE STAGE
COOLING AND ONE STAGE HEATING. STAGE 1 IS THE COOLING STAGE AND STAGE 2 IS
THE HEATING STAGE.
INSTALL SENSOR @ WATER INLET PIPE (LOAD COIL).
12 SEE FIGURE 2 ON SHEET 3 OF THIS DRAWING FOR COMPRESSOR CONTROL MODULE
OPERATION.
13
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 6 TO TERMINAL 7 ON "TB3".
14
WHEN “FS-L” AND “FS-S” ARE NOT USED, THIS WIRE CONNECTS DIRECTLY TO
TERMINAL Y OF “CCM”.
15
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
16
CONDUCTOR “O” REQUIRED WITH WWR REVERSE CYCLE UNITS.
CONDUCTOR “O” NOT USED WITH WWC COOLING AND WWR HEATING UNITS.
17
“CHR” IS USED ONLY WITH “WWR” UNITS.
“CHR” IS NOT USED WITH “WWC” AND “WWH” UNITS.
18
INTERLOCK RELAY CONTACTS ARE PROVIDED TO OPERATE AN EXTERNAL PILOT DUTY
LOAD (SUCH AS A PUMP RELAY COIL) WITH THE COMPRESSORS.
AN EXTERNAL LOAD POWERED BY TRANSFORMER “TR” IN THE WW* UNIT MUST
NOT EXCEED 12 VA SEALED (96 VA INRUSH) @ 24 VOLTS AC.
EXTERNAL LOADS POWERED FROM AN EXTERNAL SOURCE ARE LIMITED TO
CLASS 2 CIRCUITS ONLY (30 VOLTS AC MAXIMUM). EXTERNAL LOAD
CHARACTERISTICS MUST NOT EXCEED 10 AMPS MAKE, 1 AMP BREAK. MAINTAIN
SEPARATION BETWEEN CLASS 2 CIRCUITS OF DIFFERENT SOURCES.
PROVIDE DISCONNECTING MEANS, EQUIPMENT GROUNDING, AND
OVERCURRENT PROTECTION AS REQUIRED.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP20
WIRING DIAGRAM
WW* 036, 048, 060, 072
THREE PHASE
0962I-2632, REV.B
www.DaikinApplied.com
Control
relays until the temperature of the sensor is 2.5 degrees
above the selected temperature. For example, you set
the temperature to 20°F. The output relays will de-energize when the sensor temperature drops below 20°F.
The control will re-energize the output relays when the
sensor temperature rises above 22.5°F. Additionally, the
control will monitor each individual sensor to make sure
it isn't broken or shorted. If either Sensor 1 or Sensor 2
fails short or open before or during operation, the control
will de-energize both output relays until the sensor is
repaired or replaced.
Optional Low Temperature Control
Board "LTC" – 208-230/60/3, Unit
Sizes 036, 048, 060 and 072
The control board is powered by 24 volts AC, 50/60 hertz
which is applied to the 24 VAC terminals. The control will
energize the output relays (COM 1 makes connection
with NO 1 and COM 2 makes connection with NO 2), only
if the temperatures of both Sensor 1 and Sensor 2 are
above the selected temperature which is 20°F or 35°F.
Note: Always disconnect power to WW* unit before moving
jumpers.
Table 7: LTC board sensor locations
While the output relays are energized, the control keeps
monitoring Sensor 1 and Sensor 2 to make sure that the
temperature of the sensors is always above the selected
temperture, the control will de-energize both ouput
Model
Sensor 1
Sensor 2
WCA
Liquid Out - Load Coil
Liquid Out - Source Coil
WHA
Liquid Out - Load Coil
Liquid Out - Source Coil
WRA
Liquid Out - Load Coil
Liquid Out - Source Coil
Figure 4: "LTC" board jumper settings
AL7815
NO 2
DISCONNECT POWER TO
WW* UNIT BEFORE MOVING
JUMPERS
COM 2
NO 1
COM 1
35F
20F
24 VAC
35F
20F
S2
SEN 1
The 20˚F settings are used only on
closed loop systems with antifreeze
solution.
S1
Jumper “S1” selects cutout temperature
setpoint for Sensor “SEN 1”.
Jumper “S2” selects cutout temperature
setpoint for Sensor “SEN 2”.
SEN 2
Figure 5: Thermistor temperature vs. resistance graph
Thermistor Temperature Vs. Resistance
Resistance (OHMS)
70000
60000
50000
40000
30000
20000
10000
0
10
20
30
40
50
60
70
80
90
100
110
Temperature (ºF)
www.DaikinApplied.com
21
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Control
Compressor Control Module
Functional Operation –
208-230/60/3, Unit Sizes 036, 048,
060 and 072
Power:
For proper operation there must always be 18 to 30 volts
AC present at the R and C terminals.
Time Delays:
1. Anti-short cycle: provides the compressor with
short cycle protection for a selectable time of 10
seconds (for servicing only) or 5 minutes (normal
operationalsetting). This feature is enabled upon
power loss to the circuit board, loss of the Y signal,
or the opening of a switch connected to the HPS or
LPS terminals. If the selecto shunt is not in place,
the circuit will default to a 5 minute anti short-cycle
delay.
2. Delay on make: Delays the turning on of the
compressor contactor for a selectable time of 3 or 6
seconds every time the Y signal coalls. If the selector shunit is not in place, the circuit will default to a 6
second delay on make.
3. Low Pressure Bypass: Allows time for the low side
pressure to build up enough pressure at start up for
the 60 psig low pressure switch to close. The circuit
will offer a selectable timing range of 90, 120, 180,
or 300 seconds. This time delay will start upon a
Y call from the thermostat. Should the 60 psig low
pressure switch still be open after the selected delay
expires, the compressor will de-energize and the
alarm will energize. This will be defined as an LPS
fault, (factory set for 90 seconds). If necessary to
increase the delay, select the smallest amount of bypass time delay that allows the compressor to start
and operate.
Note: The 60 psig low pressure switch is jumpered out in low
temperature closed loop system applications using
antifreeze solution.
Also note tht the 35 psig low pressure switch is connected in series with the high pressure switch to the
HPS terminals and is never bypassed.
Operation Of The HPS Terminals
Switches connected to the HPS terminals are connected
in series with the Y signal through the circuit board.
These switches are also connected in series witht the
T1 output in order to provide an immediate response if
a switch were to open. If a switch conncecte to the HPS
terminal should open, the status LED will blink once.
Operation Of The LPS Terminals
The 60 psig low pressure switch (brown leads) is connected to the LPS terminals in series with the Y signal
through the circuit board. The 60 psig low pressure
switch is connected in series with the Y signal to the processor only. This will allow the control to monitor the low
pressure switch status and initiate the bypass delay. If
the 60 psig low pressure switch should open, the status
LED will blink twice.
Normal Cycle
A normal cycle will begin with 24 VAC applied to the R
and C terminals on the circuit board. Once the control
is powered up, the processor will read the Y signal to
determine if it is calling. If it is calling and the switches
connected to the HPS terminals are closed, the delay on
make and low pressure bypass timers will initiate.
If a switch connected to the HPS terminals is open, the
control will enter the lockout mode. After the delay on
make time expires, the compressor contactor will energize. It will remain energized as the low pressure bypass
timer counts down.
If the 60 psig low pressure switch is closed after the
timer expires, the compressor will remain energized. If it
is still open, the control will enter the lockout mode.
If power is lost, or the Y signal is removed, or an HPS or
LPS terminal switch fault is detected while the compressor contactor is energized, the unit will initiate the anti
short-cycle delay.
Alarm/Lockout
The alarm terminal will output the R signal and will only
be energized as a result of an HPS or LPS fault. An HPS
fault is defined as the opening of a switch connected to
the HPS terminals for any amount of time. An LPS fault
is defined as the 60 psig low pressure switch open after
the bypass time. If any of these conditions are true, the
unit will de-energize the compressor and energize the
alarm. This will be defined as a lockout condition. To
reset a lockout condition, the pressure fault must be
corrected and the Y signal from the thermostat must be
cycled.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP22
www.DaikinApplied.com
Control
Figure 6: Compressor control module functional operation
10 SEC jumper is for servicing unit only.
Do not operate unit unattended with
jumper in the 10 second position!
R
LPR-AL1701
T1
T
Disconnect power to
WW* unit before moving
jumpers!
DOM
6 SEC
3 SEC
X
Status LED
P7
P8
P9
R
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
C
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
P10
P11
P12
Y
HPS
ASC
5 MIN
10 SEC
LPS
The delay on make timer is
factory set to 3 seconds
Use lowest LPS bypass time
setting which allow unit to start and
operate. Do not set the jumper any
higher than necessary.
www.DaikinApplied.com
23
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
208-230/60/3, Unit Sizes 120, 150, 180, 240 and 300
1
L3
2
L2
1
PDB
3
L1
4
GR
EGB
R-14
BL-14
BK-14
5
6
7
8
9
10
*
COMPRESSOR WIRE SIZE TABLE
UNIT
WIRE SIZE (AWG)
MODEL
208/230 VOLT 460 & 575 VOLT
120
12
14
150
10
14
180
8
12
240
8
12
300
6
10
F1
TB6
11
F2
L1
F3
L2
2
15
*
*
BK*
R*
BL*
BK*
L3
T3
L2
T2
L1
T1
SPLICE
LTC
T2
CM2
T1
5 (L3)
4 (L2)
BK
3 (L1)
CCH1
G
CCH2
G
PM
(OPTIONAL)
BK-14
SPLICE
BK-14
R
Y
O
O
5
25
8
BK
BK
LTC
LP1
BL
COM1 NO1
7
BK
(WHEN USED)
BL
Y
W
W
28
PR
31
O
CC1-A1
BK
CR2
BK
11 LTC
COM2 NO2
BK
BL
10
LP2
37
BK
(WHEN USED)
BL
O
CC2
W
40
R
41
PR
T
C
R
X
4,5,6,45
DOM
6 SEC
3 SEC
W
T1
R
P7
P8
P9
39
HPS
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
O
38
Y
PK
1
3
HDT2
(OPTIONAL)
LPS
W
CCM2
LPR-AL1701
HP2
O
1,2,3,34,44
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
9
4
35
36
TB5
BR
P10
P11
P12
O
34
LP4
BR
8
X
ASC
7
33
TB5
R
5 MIN
10 SEC
9
ALTERNATE
CR2
32
R
T
C
4
DOM
6 SEC
3 SEC
R
T1
42
FL
43
TB3
4
R
R
C1L
CC1-A2
C2L
CC2-A
G
(WHEN USED)
G-14
P7
P8
P9
TB3
4
HPS
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
CC1
Y
27
Y
PK
1
3
HDT1
(OPTIONAL)
26
LPS
CCM1
LPR-AL1701
HP1
O
CR1
4
(OPTIONAL)
O
7
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
PR
BR
ASC
Y
(OPTIONAL)
TB4
TB3
10
SENSOR 2
P10
P11
P12
R
(OPTIONAL)
24
7
BR
6
ALTERNATE
CR1
TB3
FS-S
LP3
5 MIN
10 SEC
5
23
TB4
6
W
SEN 1 SEN 2
SENSOR 1
FS-L
3
24 VAC
R
22
45
T1
T3
BL
(OPTIONAL)
BL-14
CM1
T2
R
BL-14
R
20
44
T3
BL-
L1 CC2 T1
24V
TB3
4
19
30
T2
CLASS 2
60 HZ
TR2
16
29
L2
R-
LINE
VOLTAGE
14
21
T3
BK-14
13
18
L3
BL-14
L3
12
17
CC1
*
BL*
BK*
R*
BL*
BK*
R-
G
R
(OPTIONAL)
W
TB3
10
TB3
10
(OPTIONAL)
(OPTIONAL)
46
WIRING DIAGRAM # 0962I-2633B, REV. B
WW* 120, 150, 180, 240, 300
THREE PHASE
Note: See continuation of wiring diagram on page 25
Note: See wiring diagram legend on page 26.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP24
www.DaikinApplied.com
Wiring Diagram
(Continued) 208-230/60/3, Unit Sizes 120, 150, 180, 240 and 300
Note: Continuation of wiring diagram from page 24
47
48
LINE
VOLTAGE
49
50
TB1
51
13
EMR
2
R
4
PM
TS-H
HEAT
16 TS-C
OFF
COOL
TB1
S1
PK
S2
BL
(WHEN USED)
HEAT
56
2
CLASS 2
60 HZ
TR1
R
24V
CHR
4
2
BK RVS1
17
18
TC
STG1
C
NO
19
STG2
C
NO
R
(WHEN USED)
BK RVS2
15
TC
24
COM
BK
BK
SPLICE
(WHEN REQ’D)
BR
(OPTIONAL)
(OPTIONAL)
OFF
57
COOL
TB1
58
PK
Y1
59
BL
Y2
60
O
20
61
C
ALTERNATE
Y
CR1
JUMPER
O
21
BK
BR
1
63
64
TB2
A1
22
65
66
A2
23
A3
BK
A4
BK
1
EMR
3
CR2
BR
CHR
BR
3
A
A
CR1
CR2
B
B
23,63
34,64
52
G-14
PR
PR
ALTERNATE
CR1
CR1
4 CR2 6
9
4
9
6
CR2
6
6
PR
PR
TB7
BR
(WHEN USED)
62
69
1
12
(WHEN REQ’D)
(WHEN USED)
REMOTE SWITCH
55
68
R
14
54
67
SPLICE
(OPTIONAL)
8
(OPTIONAL)
52
53
R
R
WIRING DIAGRAM # 0962I-2633B, REV. B
WW* 120, 150, 180, 240, 300
THREE PHASE
51
(OPTIONAL)
(WHEN USED)
Note: See wiring diagram legend on page 26.
www.DaikinApplied.com
25
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
Legend
208-230/60/3, Unit Sizes 120, 150, 180, 240 and 300
LEGEND
FUNCTIONAL
LINE
DESCRIPTION
DESIGNATION NUMBER
C1L
44
OPTIONAL INDICATOR LIGHT - COMPRESSOR 1 ON
C2L
45
OPTIONAL INDICATOR LIGHT - COMPRESSOR 2 ON
CC1
27
COMPRESSOR NO. 1 CONTACTOR
CC1-A1
#
"CC1" AUXILIARY CONTACT NO. 1
CC1-A2
#
"CC1" AUXILIARY CONTACT NO. 2 (WHEN USED)
CC2
38
COMPRESSOR NO. 2 CONTACTOR
CC2-A
#
"CC" AUXILIARY CONTACT (WHEN USED)
CCH,CCH2
11,12
CRANKCASE HEATER NO. 1 & NO. 2
CCM1
21
COMPRESSOR CONTROL MODULE NO. 1
CCM2
32
COMPRESSOR CONTROL MODULE NO. 2
CHR
60
CHANGEOVER RELAY (WHEN USED)
CM1
2
COMPRESSOR NO. 1
CM2
5
COMPRESSOR NO. 2
CR1
58
COMPRESSOR NO. 1 PILOT RELAY
CR2
59
COMPRESSOR NO. 2 PILOT RELAY
EGB
4
EQUIPMENT GROUNDING BAR
EMR
67
OPTIONAL ENERGY MANAGEMENT RELAY
F1,F2,F3
7
FUSING - SEE FUSE TABLE
FL
43
OPTIONAL INDICATOR LIGHT - FAULT
FS-L
23
OPTIONAL FLOW PROVING SWITCH – LOAD COIL
FS-S
23
OPTIONAL FLOW PROVING SWITCH – SOURCE COIL
HDT1
24
HIGH DISCHARGE TEMPERATURE CUTOUT NO. 1
HDT2
35
HIGH DISCHARGE TEMPERATURE CUTOUT NO. 2
HP1
25
HIGH DISCHARGE PRESSURE CUTOUT SWITCH NO. 1
HP2
36
HIGH DISCHARGE PRESSURE CUTOUT SWITCH NO. 2
LP1
25
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 1 (CKT 1)
LP2
36
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 2 (CKT 2)
LP3
21
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 3 (CKT 1)
LP4
32
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 4 (CKT 2)
LTC
17,25,36 LOW FLUID TEMPERATURE CUTOUT MODULE
PDB
1,2,3
POWER DISTRIBUTION BLOCK
PM
9,51
OPTIONAL POWER MONITOR
RVS1
52
REVERSING VALVE SOLENOID CKT 1 (WHEN USED)
RVS2
53
REVERSING VALVE SOLENOID CKT 2 (WHEN USED)
TB1
+
TERMINAL BOARD NO. 1
TB2
64,65
TERMINAL BOARD NO. 2
TB3
+
TERMINAL BOARD NO. 3
TB4
21
TERMINAL BOARD NO. 4
TB5
32
TERMINAL BOARD NO. 5
TB6
11
TERMINAL BOARD NO. 6
TB7
67,68
TERMINAL BOARD NO. 7 (WHEN USED)
TR1
50
CONTROL TRANSFORMER NO. 1
TR2
15
CONTROL TRANSFORMER NO. 2
TC
54,54
TEMPERATURE CONTROLLER (OPTIONAL)
TS-C
55
AQUASTAT – COOLING (WHEN USED)
TS-H
54
AQUASTAT – HEATING (WHEN USED)
# SEE LINE NUMBER TO THE RIGHT OF CONTACTOR COIL ON WIRING DIAGRAM.
+ MULTIPLE LINE NUMBERS.
FUSE NO.
F1,F2,F3†
CLASS
CC
FUSE TABLE
VOLTS AC
AMPERES
600
+
WIRE COLOR LEGEND
BK: BLACK
PK:
PINK
BL: BLUE
PR (V): PURPLE (VIOLET)
BR: BROWN
R:
RED
G:
GREEN
W:
WHITE
GY: GRAY
Y:
YELLOW
O:
ORANGE
NOTES:
NUMBER PLACED AFTER DASH FOLLOWING COLOR
CODE INDICATES WIRE GAGE. FOR EXAMPLE> BK-12 IS
A BLACK, 12 AWG WIRE.
NO NUMBER AFTER COLOR CODE INDICATES 18 AWG
WIRE. FOR EXAMPLE> BK IS A BLACK 18 AWG WIRE.
WHEN COLOR COMBINATIONS ARE USED, THE COLORS
ARE SEPARATED BY A SLASH (/). FOR EXAMPLE:
ORANGE/WHITE (O/W). THE PRIMARY COLOR CODE OF
THE WIRE IS SHOWN FIRST, TRACER OR STRIPE SHOWN
LAST.
BONDING CONDUCTORS INDICATED AS GREEN MAY
ALSO BE GREEN WITH ONE OR MORE YELLOW STRIPES.
SYMBOL LEGEND
FACTORY WIRING
OPTIONAL FACTORY WIRING
FIELD WIRING
OPTIONAL FIELD WIRING
EARTH GROUND
CHASSIS (PANEL) GROUND
TERMINAL BOARD NO. 1 (TB1)
TERMINAL BOARD NO. 2 (TB2)
TERMINAL BOARD NO. 3 (TB3)
TERMINAL BOARD NO. 4 (TB4)
TERMINAL BOARD NO. 5 (TB5)
TERMINAL BOARD NO. 6 (TB6)
TERMINAL BOARD NO. 7 (TB7)
COIL
NORMALLY OPEN CONTACTS
NORMALLY CLOSED CONTACTS
TIME DELAY
YES
IDENTIFIABLE TERMINAL
† F3 IS USED ONLY WHEN OPTIONAL POWER MONITOR IS FURNISHED.
NON-IDENTIFIABLE TERMINAL,
OTHER WIRE JUNCTIONS,
INCLUDING SCHEMATIC
+ 208/230 VOLT UNITS USE 2 AMPERES.
460 VOLT UNITS USE 1 AMPERES.
1
THREE PHASE FIELD POWER SUPPLY PER UNIT RATING PLATE. MINIMUM CIRCUIT
AMPACITY AND MAXIMUM SIZE OF TIME-DELAY FUSE OR HACR-TYPE CIRCUIT BREAKER
PER UNIT RATING PLATE. PROVIDE DISCONNECTING MEANS AND EQUIPMENT
GROUNDING AS REQUIRED.
14
2
TRANSFORMER MAY HAVE TAPS FOR MULTIPLE SYSTEM POWER SUPPLY VOLTAGES.
BEFORE APPLYING POWER TO THE UNIT, ENSURE TRANSFORMER IS WIRED FOR
APPROPRIATE SYSTEM POWER SUPPLY. INSULATE SEPARATELY ANY UNUSED LEADS.
15
POLARITY IS NOT INDICATED. TYPICAL TRANSFORMER SHOWN. SEE TRANSFORMER LABEL
FOR LEAD COLOR CODING. A PUSH TO RESET FUSEHOLDER-TYPE THERMAL CIRCUIT
BREAKER IS MOUNTED ON THE TRANSFORMER. THE CIRCUIT BREAKER IS WIRED IN SERIES
16
WITH ONE SIDE OF THE TRANSFORMER SECONDARY WINDING.
TYPICAL FIELD CONTROL WIRING SHOWN. ACTUAL FIELD WIRING MAY DIFFER FROM
WIRING SHOWN HERE. USE 18 AWG MINIMUM FOR FIELD 24 VOLT CONTROL WIRING.
TYPICAL REMOTE SWITCH SHOWN. REMOTE SWITCH MAY BE SUPPLIED BY OTHERS
OR IS AVAILABLE AS AN OPTIONAL ACCESSORY FROM THE FACTORY. MINIMUM PILOT
DUTY RATING OF EACH POLE OF REMOTE SWITCH IS 24 VOLT-AMPERES @ 24 VOLTS
AC WHEN CONNECTED AS SHOWN.
“RVS1” AND “RVS2” ARE USED ONLY WITH WWR MODELS AND ARE ENERGIZED IN
COOLING MODE.
“RVS1” AND “RVS2” ARE NOT USED WITH WWC AND WWH MODELS.
AQUASTATS “TS-H” AND “TS-C” ARE NOT USED WHEN OPTIONAL FACTORY INSTALLED
TEMPERATURE CONTROLLER “TC” IS FURNISHED. TYPICAL AQUASTATS SHOWN.
AQUASTATS MAY BE SUPPLIED BY OTHERS OR ARE AVAILABLE AS AN OPTIONAL
ACCESSORY FROM THE FACTORY. MINIMUM PILOT DUTY RATING OF EACH POLE OF
AQUASTAT IS 24 VOLT-AMPERES @ 24 VOLTS AC WHEN CONNECTED AS SHOWN.
3
SEE FIGURE 1 ON SHEET 3 OF THIS DRAWING FOR BOARD LAYOUT, SENSOR
LOCATIONS, TEMPERATURE SETTING NOTE, AND SENSOR RESISTANCE VERSUS
TEMPERATURE GRAPH.
4
SEE FIGURE 2 ON SHEET 3 OF THIS DRAWING FOR COMPRESSOR CONTROL MODULE
OPERATION.
17
THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S1 TO TERMINAL Y1 ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
5
WHEN “FS-L” AND “FS-S” ARE NOT USED, THIS WIRE CONNECTS DIRECTLY TO
TERMINAL 5 OF “TB3”.
18
THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S2 TO TERMINAL Y2 ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
6
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 6 TO TERMINAL 7 ON "TB4".
19
7
WHEN “LTC” IS NOT USED, THIS WIRE CONNECTS DIRECTLY FROM “HPS1” TO EITHER
“HDT1” WHEN USED OR TO HPS TERMINAL OF “CCM1” (“HDT1” NOT USED).
WHEN OPTIONAL TEMPERATURE CONTROLLER “TC” IS FURNISHED, INSTALLER MUST
PROGRAM CONTROLLER. REFER TO TEMPERATURE CONTROL INSTALLATION
INSTRUCTIONS.
WITH REVERSE-CYCLE WWR UNITS, PROGRAM CONTROLLER AS ONE STAGE
COOLING AND ONE STAGE HEATING. STAGE 1 IS THE COOLING STAGE AND STAGE 2 IS
THE HEATING STAGE.
INSTALL SENSOR ON THE WATER INLET PIPE (LOAD COIL).
8
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
9
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 8 TO TERMINAL 9 ON "TB5".
20
CONDUCTOR “O” REQUIRED WITH WWR REVERSE CYCLE UNITS.
CONDUCTOR “O” NOT USED WITH WWC COOLING AND WWR HEATING UNITS.
21
“CHR” IS USED ONLY WITH “WWR” UNITS.
“CHR” IS NOT USED WITH “WWC” AND “WWH” UNITS.
22
COMPRESSOR RELAY CONTACTS ARE PROVIDED TO OPERATE AN EXTERNAL PILOT
DUTY LOAD (SUCH AS A PUMP RELAY COIL) WITH THE COMPRESSORS.
AN EXTERNAL LOAD POWERED BY TRANSFORMER “TR1” IN THE WW* UNIT MUST
NOT EXCEED 12 VA SEALED (96 VA INRUSH) @ 24 VOLTS AC.
EXTERNAL LOADS POWERED FROM AN EXTERNAL SOURCE ARE LIMITED TO
CLASS 2 CIRCUITS ONLY (30 VOLTS AC MAXIMUM). EXTERNAL LOAD
CHARACTERISTICS MUST NOT EXCEED 10 AMPS MAKE, 1 AMP BREAK. MAINTAIN
SEPARATION BETWEEN CLASS 2 CIRCUITS OF DIFFERENT SOURCES.
PROVIDE DISCONNECTING MEANS, EQUIPMENT GROUNDING, AND
OVERCURRENT PROTECTION AS REQUIRED.
10 WHEN “LTC” IS NOT USED, THIS WIRE CONNECTS DIRECTLY FROM “HPS2” TO EITHER
“HDT2” WHEN USED OR TO HPS TERMINAL OF “CCM2” (“HDT2” NOT USED).
11 WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
12 WHEN “CHR” IS NOT USED, THIS WIRE CONNECTS DIRECTLY TO TERMINAL 1 ON “PM” -OR-- WHEN “PM” IS NOT USED, TO TERMINAL 4 ON “EMR” --OR-- WHEN “EMR” IS NOT
USED,TO TERMINAL R ON “TB1”.
13 IF POWER MONITOR OUTPUT CONTACTS DO NOT TRANSFER WHEN POWER IS APPLIED
TO UNIT (BICOLOR LED GLOWS GREEN UNDER NORMAL CONDITIONS AND RED
DURING FAULT CONDITIONS):
1. VERIFY THAT ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT
VOLTAGE. IF ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT VOLTAGE,
PHASE ROTATION MAY BE INCORRECT. PERFORM STEP 2.
2. DISCONNECT POWER TO THE WW* UNIT. VERIFY THAT POWER IS IN FACT
DISCONNECTED. SWAP ANY TWO OF THE THREE UNIT POWER SUPPLY WIRES. WHEN
POWER IS REAPPLIED, OUTPUT CONTACTS SHOULD NOW TRANSFER.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
WIRING DIAGRAM # 0962I-2633B, REV. B
WW* 120, 150, 180, 240, 300
26
www.DaikinApplied.com
Control
relays until the temperature of the sensor is 2.5 degrees
above the selected temperature. For example, you set
the temperature to 20°F. The output relays will de-energize when the sensor temperature drops below 20°F.
The control will re-energize the output relays when the
sensor temperature rises above 22.5°F. Additionally, the
control will monitor each individual sensor to make sure
it isn't broken or shorted. If either Sensor 1 or Sensor 2
fails short or open before or during operation, the control
will de-energize both output relays until the sensor is
repaired or replaced.
Optional Low Temperature Control
Board "LTC" – 3 Phase, Unit Sizes
120, 150, 180, 240 and 300
The control board is powered by 24 volts AC, 50/60 hertz
which is applied to the 24 VAC terminals. The control
will energize the output relays (COM 1 makes connection with NO 1 and COM 2 makes connection with NO
2), only if the temperatures of both Sensor 1 and Sensor
2 are above the selected temperature which is 20°F or
35°F.
Table 8: LTC board sensor locations
Note: Always disconnect power to WW* unit before moving
jumpers.
While the output relays are energized, the control keeps
monitoring Sensor 1 and Sensor 2 to make sure that the
temperature of the sensors is always above the selected
temperture, the control will de-energize both ouput
Model
Sensor 1
Sensor 2
WCA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
WHA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
WRA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
Figure 7: "LTC" board jumper settings
AL7815
NO 2
DISCONNECT POWER TO
WW* UNIT BEFORE MOVING
JUMPERS
COM 2
NO 1
COM 1
35F
20F
24 VAC
35F
20F
S2
SEN 1
The 20˚F settings are used only on
closed loop systems with antifreeze
solution.
S1
Jumper “S1” selects cutout temperature
setpoint for Sensor “SEN 1”.
Jumper “S2” selects cutout temperature
setpoint for Sensor “SEN 2”.
SEN 2
Figure 8: Thermistor temperature vs. resistance graph
Thermistor Temperature Vs. Resistance
Resistance (OHMS)
70000
60000
50000
40000
30000
20000
10000
0
10
20
30
40
50
60
70
80
90
100
110
Temperature (ºF)
www.DaikinApplied.com
27
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Control
Compressor Control Module
Functional Operation –
208-230/60/3, Unit Sizes 120, 150,
180, 240 and 300
Power:
For proper operation there must always be 18 to 30 volts
AC present at the R and C terminals.
Time Delays:
1. Anti-short cycle: provides the compressor with
short cycle protection for a selectable time of 10
seconds (for servicing only) or 5 minutes (normal
operationalsetting). This feature is enabled upon
power loss to the circuit board, loss of the Y signal,
or the opening of a switch connected to the HPS or
LPS terminals. If the selecto shunt is not in place,
the circuit will default to a 5 minute anti short-cycle
delay.
2. Delay on make: Delays the turning on of the
compressor contactor for a selectable time of 3 or 6
seconds every time the Y signal coalls. If the selector shunit is not in place, the circuit will default to a 6
second delay on make.
3. Low Pressure Bypass: Allows time for the low side
pressure to build up enough pressure at start up for
the 60 psig low pressure switch to close. The circuit
will offer a selectable timing range of 90, 120, 180,
or 300 seconds. This time delay will start upon a
Y call from the thermostat. Should the 60 psig low
pressure switch still be open after the selected delay
expires, the compressor will de-energize and the
alarm will energize. This will be defined as an LPS
fault, (factory set for 90 seconds). If necessary to
increase the delay, select the smallest amount of bypass time delay that allows the compressor to start
and operate.
Note: The 60 psig low pressure switch is jumpered out in low
temperature closed loop system applications using
antifreeze solution.
Also note tht the 35 psig low pressure switch is connected in series with the high pressure switch to the
HPS terminals and is never bypassed.
Operation Of The HPS Terminals
Switches connected to the HPS terminals are connected
in series with the Y signal through the circuit board.
These switches are also connected in series witht the
T1 output in order to provide an immediate response if
a switch were to open. If a switch conncecte to the HPS
terminal should open, the status LED will blink once.
Operation Of The LPS Terminals
The 60 psig low pressure switch (brown leads) is connected to the LPS terminals in series with the Y signal
through the circuit board. The 60 psig low pressure
switch is connected in series with the Y signal to the processor only. This will allow the control to monitor the low
pressure switch status and initiate the bypass delay. If
the 60 psig low pressure switch should open, the status
LED will blink twice.
Normal Cycle
A normal cycle will begin with 24 VAC applied to the R
and C terminals on the circuit board. Once the control
is powered up, the processor will read the Y signal to
determine if it is calling. If it is calling and the switches
connected to the HPS terminals are closed, the delay on
make and low pressure bypass timers will initiate.
If a switch connected to the HPS terminals is open, the
control will enter the lockout mode. After the delay on
make time expires, the compressor contactor will energize. It will remain energized as the low pressure bypass
timer counts down.
If the 60 psig low pressure switch is closed after the
timer expires, the compressor will remain energized. If it
is still open, the control will enter the lockout mode.
If power is lost, or the Y signal is removed, or an HPS or
LPS terminal switch fault is detected while the compressor contactor is energized, the unit will initiate the anti
short-cycle delay.
Alarm/Lockout
The alarm terminal will output the R signal and will only
be energized as a result of an HPS or LPS fault. An HPS
fault is defined as the opening of a switch connected to
the HPS terminals for any amount of time. An LPS fault
is defined as the 60 psig low pressure switch open after
the bypass time. If any of these conditions are true, the
unit will de-energize the compressor and energize the
alarm. This will be defined as a lockout condition. To
reset a lockout condition, the pressure fault must be
corrected and the Y signal from the thermostat must be
cycled.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP28
www.DaikinApplied.com
Control
Figure 9: Compressor control module functional operation
10 SEC jumper is for servicing unit only.
Do not operate unit unattended with
jumper in the 10 second position!
T
DOM
6 SEC
3 SEC
X
Disconnect power to
WW* unit before moving
jumpers!
P7
P8
P9
R
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
C
Status LED
R
LPR-AL1701
T1
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
P10
P11
P12
Y
HPS
ASC
5 MIN
10 SEC
LPS
To prevent both compressors from
starting at the same time (resulting in
extremely high inrush current): The
delay on make timer for CCM1 is factory
set to 3 seconds. The delay on make timer
for CCM2 is factory set to 6 seconds.
Use lowest LPS bypass time
setting which allow unit to start and
operate. Do not set the jumper any
higher than necessary.
www.DaikinApplied.com
29
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
208/230-60-3, Unit Sizes 360, 420
Note: See wiring diagram legend on page 32.
PDB
L3
1
L2
1
2
3
L1
4
GR
EGB
R-14
BL-14
BK-14
5
6
COMPRESSOR WIRE SIZE TABLE
*UNIT
MODEL
WIRE SIZE
7
360
420
CC1
*
BL*
BK*
R*
BL*
BK*
R-
F1
6 AWG
4 AWG
F2
F3
L3
T3
L2
T2
*
*
BK*
R*
BL*
BK*
R-
L1 CC2 T1
L3
T3
L2
T2
L1
T1
T3
BL-
T2
CM1
T1
T3
T2
CM2
T1
R
5 (L3)
9
BL
4 (L2)
10
BK
3 (L1)
8
TB6
11
L1
L1
L2
L2
SPLICE
R-14
L3
BL-14
12
R-14
(OPTIONAL)
CCH1
G
CCH2
R-14
G
PM
(OPTIONAL)
BL-14
SPLICE
BL-14
13
14
15
208/230V
16
20
4.0A
Y
18
19
TR2
2
17
TB3
4
24V
96 VA
CLASS 2
60 HZ
BL
(OPTIONAL)
PR
TB3
O
(OPTIONAL)
HP1
27
7
BK
1
3
COM1 NO1
BL
LP1
BL
(OPTIONAL)
28
Y
COPM1
M1
M2
CC1
Y
W
W
30
R
R
PR
R
33
COPM1
Y
39
T1
COM2 NO2
COPM2
M1
SPLICE
O
T1
T2
LP2
M2
O
CC2
W
W
SPLICE
R
PR
T1
R
T
C
R
X
44
45
46
TB3
4
47
4,5,6,47
DOM
6 SEC
3 SEC
R
COPM2
43
BL
O
HPS
FL
R
R
CC1-A2
C1L
CC2-A
C2L
(WHEN USED)
TB3
10
P7
P8
P9
42
W
BL
Y
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
40
41
BK
LTC
LPS
PK
3
(OPTIONAL)
W
T2
BK
1
O
O
CR2
BK
9
9
W
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
HP2
BR
1,2,3,36,46
CCM2
ASC
38
O
CC1-A1
TB5
LPR-AL1701
37
BR
8
X
P10
P11
P12
36
NOTE: USE THIS WIRING
CONNECTION WHEN T1 & T2 OF
“COPM” CALLS FOR 24V. CHECK THE
COMPRESSOR OVERLOAD
PROTECTION MODULE FOR
CORRECT MODULE VOLTAGE FOR
T1 & T2 BEFORE WIRING.
LP4
R
5 MIN
10 SEC
34
35
TB5
8
R
T
C
4
DOM
6 SEC
3 SEC
32
TB3
4
T1
G-14
P7
P8
P9
31
HPS
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
29
Y
PK
BK
LTC
LPS
CCM1
LPR-AL1701
26
O
CR1
O
5
O
7
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
25
FS-S
TB4
BR
ASC
FS-L
LP3
P10
P11
P12
5
BR
6
TB3
10
SENSOR 2
(OPTIONAL)
5 MIN
10 SEC
TB4
6
23
W
SEN 1 SEN 2
SENSOR 1
22
24
3
24 VAC
R
21
LTC
R
G
G
(OPTIONAL)
W
W
R
W
(OPTIONAL)
W
W
TB3
10
10
(OPTIONAL)
WIRING DIAGRAM # 0962I-2634 REV. C
WW* 360, 420
208/230-3-60
Note: See continuation of wiring diagram on page 31
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP30
www.DaikinApplied.com
Wiring Diagram
(Continued) 208/230-60-3, Unit Sizes 360, 420
Note: Continuation of wiring diagram from page 30
48
208/230V
49
50
TB1
R
51
52
53
54
55
56
57
R
SPLICE
PM
11
8
R
1
(WHEN REQ’D)
(OPTIONAL)
TS-H
HEAT
OFF
14 TS-C
COOL
HEAT
TB1
S1
PK
S2
BL
(WHEN USED)
15
16
TC
2
Y
R
12
REMOTE SWITCH
10
STG1
C
NO
17
STG2
C
NO
R
TR1
4.0A
CHR
4
2
24V
96 VA
CLASS 2
60 HZ
BL
BK RVS1
(WHEN USED)
BK RVS2
13
TC
24
COM
BK
BK
SPLICE
(WHEN REQ’D)
BR
(OPTIONAL)
(OPTIONAL)
OFF
COOL
TB1
58
PK
Y1
59
BL
Y2
60
18
61
O
C
Y
JUMPER
O
19
BK
BR
BL
G-14
1
64
65
66
20
TB2
A1
A2
PR
PR
BR
25,63
CR2
BR
36,64
CHR
BR
52
3
(WHEN USED)
62
63
CR1
CR1
4 CR2 6
4
6
PR
WIRING DIAGRAM # 0962I-2634 REV. C
WW* 360, 420
208/230-3-60
PR
Note: See wiring diagram legend on page 32.
www.DaikinApplied.com
31
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
Legend
208/230-60-3, Unit Sizes 360, 420
LEGEND
FUNCTIONAL
LINE
DESCRIPTION
DESIGNATION NUMBER
C1L
46
OPTIONAL INDICATOR LIGHT - COMPRESSOR 1 ON
C2L
47
OPTIONAL INDICATOR LIGHT - COMPRESSOR 2 ON
CC1
29
COMPRESSOR NO. 1 CONTACTOR
CC1-A1
#
"CC1" AUXILIARY CONTACT NO. 1
CC1-A2
#
"CC1" AUXILIARY CONTACT NO. 2 (WHEN USED)
CC2
40
COMPRESSOR NO. 2 CONTACTOR
CC2-A
#
"CC" AUXILIARY CONTACT (WHEN USED)
CCH1,CCH2
11,12
CRANKCASE HEATER NO. 1 & NO. 2
CCM1
22
COMPRESSOR CONTROL MODULE NO. 1
CCM2
33
COMPRESSOR CONTROL MODULE NO. 2
CHR
60
CHANGEOVER RELAY (WHEN USED)
CM1
2
COMPRESSOR NO. 1
CM2
5
COMPRESSOR NO. 2
COPM1
12,29
COMPRESSOR NO. 1 OVERLOAD PROTECTION MODULE
COPM2
14,40
COMPRESSOR NO. 2 OVERLOAD PROTECTION MODULE
CR1
58
COMPRESSOR NO. 1 PILOT RELAY
CR2
59
COMPRESSOR NO. 2 PILOT RELAY
EGB
4
EQUIPMENT GROUNDING BAR
F1,F2,F3
7
FUSING - SEE FUSE TABLE
FL
45
OPTIONAL INDICATOR LIGHT - FAULT
FS-L
25
OPTIONAL FLOW PROVING SWITCH – LOAD COIL
FS-S
25
OPTIONAL FLOW PROVING SWITCH – SOURCE COIL
HP1
27
HIGH DISCHARGE PRESSURE CUTOUT SWITCH NO. 1
HP2
38
HIGH DISCHARGE PRESSURE CUTOUT SWITCH NO. 2
LP1
27
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 1 (CKT 1)
LP2
38
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 2 (CKT 2)
LP3
23
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 3 (CKT 1)
LP4
34
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 4 (CKT 2)
LTC
19,27,38 LOW FLUID TEMPERATURE CUTOUT MODULE
PDB
1,2,3
POWER DISTRIBUTION BLOCK
PM
9,51
OPTIONAL POWER MONITOR
RVS1
52
REVERSING VALVE SOLENOID CKT 1 (WHEN USED)
RVS2
53
REVERSING VALVE SOLENOID CKT 2 (WHEN USED)
TB1
+
TERMINAL BOARD NO. 1
TB2
64,65
TERMINAL BOARD NO. 2
TB3
+
TERMINAL BOARD NO. 3
TB4
23
TERMINAL BOARD NO. 4
TB5
34
TERMINAL BOARD NO. 5
TB6
11
TERMINAL BOARD NO. 6
TR1
50
CONTROL TRANSFORMER NO. 1
TR2
17
CONTROL TRANSFORMER NO. 2
TC
54
TEMPERATURE CONTROLLER (OPTIONAL)
TS-C
55
AQUASTAT – COOLING (WHEN USED)
TS-H
54
AQUASTAT – HEATING (WHEN USED)
# SEE LINE NUMBER TO THE RIGHT OF CONTACTOR COIL ON WIRING DIAGRAM.
+ MULTIPLE LINE NUMBERS.
FUSE TABLE
FUSE NO.
CLASS
VOLTS AC
AMPERES
F1,F2,F3†
CC
600
3
† F3 IS USED ONLY WHEN OPTIONAL POWER
MONITOR IS FURNISHED.
1
2
3
WIRE COLOR LEGEND
BK: BLACK
PK:
PINK
BL: BLUE
PR (V): PURPLE (VIOLET)
BR: BROWN
R:
RED
G:
GREEN
W:
WHITE
GY: GRAY
Y:
YELLOW
O:
ORANGE
NOTES:
NUMBER PLACED AFTER DASH FOLLOWING
COLOR CODE INDICATES WIRE GAGE. FOR
EXAMPLE> BK-12 IS A BLACK, 12 AWG WIRE.
NO NUMBER AFTER COLOR CODE INDICATES 18
AWG WIRE. FOR EXAMPLE> BK IS A BLACK 18
AWG WIRE.
BONDING CONDUCTORS INDICATED AS GREEN
MAY ALSO BE GREEN WITH ONE OR MORE
YELLOW STRIPES.
ASTERISK AFTER DASH FOLLOWING COLOR
CODE INDICATES REFERRAL TO COMPRESSOR
WIRE SIZE TABLE.
SYMBOL LEGEND
FACTORY WIRING
OPTIONAL FACTORY WIRING
FIELD WIRING
OPTIONAL FIELD WIRING
EARTH GROUND
CHASSIS (PANEL) GROUND
TERMINAL BOARD NO. 1 (TB1)
TERMINAL BOARD NO. 2 (TB2)
TERMINAL BOARD NO. 3 (TB3)
TERMINAL BOARD NO. 4 (TB4)
TERMINAL BOARD NO. 5 (TB5)
TERMINAL BOARD NO. 6 (TB6)
COIL
NORMALLY OPEN CONTACTS
NORMALLY CLOSED CONTACTS
TIME DELAY
YES
THREE PHASE FIELD POWER SUPPLY PER UNIT RATING PLATE. MINIMUM CIRCUIT
AMPACITY AND MAXIMUM SIZE OF TIME-DELAY FUSE OR HACR-TYPE CIRCUIT BREAKER
PER UNIT RATING PLATE. PROVIDE DISCONNECTING MEANS AND EQUIPMENT
GROUNDING AS REQUIRED.
IDENTIFIABLE TERMINAL
NON-IDENTIFIABLE TERMINAL,
OTHER WIRE JUNCTIONS,
INCLUDING SCHEMATIC
13
14
TRANSFORMER MAY HAVE TAPS FOR 120V, 208V, 240V, OR 480V SYSTEM POWER SUPPLY.
BEFORE APPLYING POWER TO THE UNIT, ENSURE TRANSFORMER IS WIRED FOR
APPROPRIATE SYSTEM POWER SUPPLY. INSULATE SEPARATELY ANY UNUSED LEADS.
POLARITY IS NOT INDICATED. TYPICAL TRANSFORMER SHOWN. SEE TRANSFORMER LABEL
FOR LEAD COLOR CODING. A 4.0 AMP POTTER & BRUMFIELD PUSH TO RESET
FUSEHOLDER-TYPE THERMAL CIRCUIT BREAKER, P&B PART NO. W28XQ1A-4, IS MOUNTED 15
ON THE TRANSFORMER. THE W28-X IS WIRED IN SERIES WITH ONE SIDE OF THE
TRANSFORMER SECONDARY WINDING.
16
SEE FIGURE 1 ON SHEET 3 OF THIS DRAWING FOR BOARD LAYOUT FOR SENSOR
LOCATIONS, TEMPERATURE SETTING NOTE, AND SENSOR RESISTANCE VERSUS
TEMPERATURE GRAPH.
17
“RVS1” AND “RVS2” ARE USED ONLY WITH WWR MODELS AND ARE ENERGIZED IN
COOLING MODE.
“RVS1” AND “RVS2” ARE NOT USED WITH WWC AND WWH MODELS.
AQUASTATS “TS-H” AND “TS-C” ARE NOT USED WHEN OPTIONAL FACTORY INSTALLED
TEMPERATURE CONTROLLER “TC” IS FURNISHED. TYPICAL AQUASTATS SHOWN.
AQUASTATS MAY BE SUPPLIED BY OTHERS OR ARE AVAILABLE AS AN OPTIONAL
ACCESSORY FROM THE FACTORY. MINIMUM PILOT DUTY RATING OF EACH POLE OF
AQUASTAT IS 24 VOLT-AMPERES @ 24 VOLTS AC WHEN CONNECTED AS SHOWN.
THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S1 TO TERMINAL Y1 ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S2 TO TERMINAL Y2 ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
WHEN OPTIONAL TEMPERATURE CONTROLLER “TC” IS FURNISHED, INSTALLER MUST
PROGRAM CONTROLLER. REFER TO TEMPERATURE CONTROL INSTALLATION
INSTRUCTIONS.
WITH REVERSE-CYCLE WWR UNITS, PROGRAM CONTROLLER AS ONE STAGE
COOLING AND ONE STAGE HEATING. STAGE 1 IS THE COOLING STAGE AND STAGE 2 IS
THE HEATING STAGE.
INSTALL SENSOR @ WATER INLET PIPE (LOAD COIL).
4
SEE FIGURE 2 ON SHEET 3 OF THIS DRAWING FOR COMPRESSOR CONTROL MODULE
OPERATION.
5
WHEN “FS-L” AND “FS-S” ARE NOT USED, THIS WIRE CONNECTS DIRECTLY TO
TERMINAL 6 OF “TB3”.
6
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 6 TO TERMINAL 7 ON "TB4".
18
CONDUCTOR “O” REQUIRED WITH WWR REVERSE CYCLE UNITS.
CONDUCTOR “O” NOT USED WITH WWC COOLING AND WWR HEATING UNITS.
7
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
19
“CHR” IS USED ONLY WITH “WWR” UNITS.
“CHR” IS NOT USED WITH “WWC” AND “WWH” UNITS.
8
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 8 TO TERMINAL 9 ON "TB5".
20
9
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
COMPRESSOR RELAY CONTACTS ARE PROVIDED TO OPERATE AN EXTERNAL PILOT
DUTY LOAD (SUCH AS A PUMP RELAY COIL) WITH THE COMPRESSORS.
AN EXTERNAL LOAD POWERED BY TRANSFORMER “TR1” IN THE WW* UNIT MUST
NOT EXCEED 12 VA SEALED (96 VA INRUSH) @ 24 VOLTS AC.
EXTERNAL LOADS POWERED FROM AN EXTERNAL SOURCE ARE LIMITED TO
CLASS 2 CIRCUITS ONLY (30 VOLTS AC MAXIMUM). EXTERNAL LOAD
CHARACTERISTICS MUST NOT EXCEED 10 AMPS MAKE, 1 AMP BREAK. MAINTAIN
SEPARATION BETWEEN CLASS 2 CIRCUITS OF DIFFERENT SOURCES.
PROVIDE DISCONNECTING MEANS, EQUIPMENT GROUNDING, AND
OVERCURRENT PROTECTION AS REQUIRED.
10 WHEN “CHR” IS NOT USED, THIS WIRE CONNECTS DIRECTLY TO EITHER TERMINAL 1
ON “PM” --OR-- WHEN “PM” IS NOT USED, TO TERMINAL R ON “TB1”.
11 IF POWER MONITOR OUTPUT CONTACTS DO NOT TRANSFER WHEN POWER IS APPLIED
TO UNIT (BICOLOR LED GLOWS GREEN UNDER NORMAL CONDITIONS AND RED
DURING FAULT CONDITIONS):
1. VERIFY THAT ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT
VOLTAGE. IF ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT VOLTAGE,
PHASE ROTATION MAY BE INCORRECT. PERFORM STEP 2.
2. DISCONNECT POWER TO THE WW* UNIT. VERIFY THAT POWER IS IN FACT
DISCONNECTED. SWAP ANY TWO OF THE THREE UNIT POWER SUPPLY WIRES. WHEN
POWER IS REAPPLIED, OUTPUT CONTACTS SHOULD NOW TRANSFER.
12 TYPICAL FIELD CONTROL WIRING SHOWN. ACTUAL FIELD WIRING MAY DIFFER FROM
WIRING SHOWN HERE. USE 18 AWG MINIMUM FOR FIELD 24 VOLT CONTROL WIRING.
TYPICAL REMOTE SWITCH SHOWN. REMOTE SWITCH MAY BE SUPPLIED BY OTHERS
OR IS AVAILABLE AS AN OPTIONAL ACCESSORY FROM THE FACTORY. MINIMUM PILOT
DUTY RATING OF EACH POLE OF REMOTE SWITCH IS 24 VOLT-AMPERES @ 24 VOLTS
AC WHEN CONNECTED AS SHOWN.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP32
WIRING DIAGRAM # 0962I-2634 REV. C
WW* 360, 420
208/230-3-60
www.DaikinApplied.com
Control
relays until the temperature of the sensor is 2.5 degrees
above the selected temperature. For example, you set
the temperature to 20°F. The output relays will de-energize when the sensor temperature drops below 20°F.
The control will re-energize the output relays when the
sensor temperature rises above 22.5°F. Additionally, the
control will monitor each individual sensor to make sure
it isn't broken or shorted. If either Sensor 1 or Sensor 2
fails short or open before or during operation, the control
will de-energize both output relays until the sensor is
repaired or replaced.
Optional Low Temperature Control
Board "LTC" – 208/230-60-3, Unit
Sizes 360, 420
The control board is powered by 24 volts AC, 50/60 hertz
which is applied to the 24 VAC terminals. The control will
energize the output relays (COM 1 makes connection
with NO 1 and COM 2 makes connection with NO 2), only
if the temperatures of both Sensor 1 and Sensor 2 are
above the selected temperature which is 20°F or 35°F.
Note: Always disconnect power to WW* unit before moving
jumpers.
Table 9: LTC board sensor locations
While the output relays are energized, the control keeps
monitoring Sensor 1 and Sensor 2 to make sure that the
temperature of the sensors is always above the selected
temperture, the control will de-energize both ouput
Model
Sensor 1
Sensor 2
WCA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
WHA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
WRA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
Figure 10: "LTC" board jumper settings
AL7815
NO 2
DISCONNECT POWER TO
WW* UNIT BEFORE MOVING
JUMPERS
COM 2
NO 1
COM 1
35F
20F
24 VAC
35F
20F
S2
SEN 1
The 20˚F settings are used only on
closed loop systems with antifreeze
solution.
S1
Jumper “S1” selects cutout temperature
setpoint for Sensor “SEN 1”.
Jumper “S2” selects cutout temperature
setpoint for Sensor “SEN 2”.
SEN 2
Figure 11: Thermistor temperature vs. resistance graph
Thermistor Temperature Vs. Resistance
Resistance (OHMS)
70000
60000
50000
40000
30000
20000
10000
0
10
20
30
40
50
60
70
80
90
100
110
Temperature (ºF)
www.DaikinApplied.com
33
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Control
Compressor Control Module
Functional Operation – 208/230-603, Unit Sizes 360, 420
Power:
For proper operation there must always be 18 to 30 volts
AC present at the R and C terminals.
Time Delays:
1. Anti-short cycle: provides the compressor with
short cycle protection for a selectable time of 10
seconds (for servicing only) or 5 minutes (normal
operationalsetting). This feature is enabled upon
power loss to the circuit board, loss of the Y signal,
or the opening of a switch connected to the HPS or
LPS terminals. If the selecto shunt is not in place,
the circuit will default to a 5 minute anti short-cycle
delay.
2. Delay on make: Delays the turning on of the
compressor contactor for a selectable time of 3 or 6
seconds every time the Y signal coalls. If the selector shunit is not in place, the circuit will default to a 6
second delay on make.
3. Low Pressure Bypass: Allows time for the low side
pressure to build up enough pressure at start up for
the 60 psig low pressure switch to close. The circuit
will offer a selectable timing range of 90, 120, 180,
or 300 seconds. This time delay will start upon a
Y call from the thermostat. Should the 60 psig low
pressure switch still be open after the selected delay
expires, the compressor will de-energize and the
alarm will energize. This will be defined as an LPS
fault, (factory set for 90 seconds). If necessary to
increase the delay, select the smallest amount of bypass time delay that allows the compressor to start
and operate.
Note: The 60 psig low pressure switch is jumpered out in low
temperature closed loop system applications using
antifreeze solution.
Also note tht the 35 psig low pressure switch is connected in series with the high pressure switch to the
HPS terminals and is never bypassed.
Operation Of The HPS Terminals
Switches connected to the HPS terminals are connected
in series with the Y signal through the circuit board.
These switches are also connected in series witht the
T1 output in order to provide an immediate response if
a switch were to open. If a switch conncecte to the HPS
terminal should open, the status LED will blink once.
Operation Of The LPS Terminals
The 60 psig low pressure switch (brown leads) is connected to the LPS terminals in series with the Y signal
through the circuit board. The 60 psig low pressure
switch is connected in series with the Y signal to the processor only. This will allow the control to monitor the low
pressure switch status and initiate the bypass delay. If
the 60 psig low pressure switch should open, the status
LED will blink twice.
Normal Cycle
A normal cycle will begin with 24 VAC applied to the R
and C terminals on the circuit board. Once the control
is powered up, the processor will read the Y signal to
determine if it is calling. If it is calling and the switches
connected to the HPS terminals are closed, the delay on
make and low pressure bypass timers will initiate.
If a switch connected to the HPS terminals is open, the
control will enter the lockout mode. After the delay on
make time expires, the compressor contactor will energize. It will remain energized as the low pressure bypass
timer counts down.
If the 60 psig low pressure switch is closed after the
timer expires, the compressor will remain energized. If it
is still open, the control will enter the lockout mode.
If power is lost, or the Y signal is removed, or an HPS or
LPS terminal switch fault is detected while the compressor contactor is energized, the unit will initiate the anti
short-cycle delay.
Alarm/Lockout
The alarm terminal will output the R signal and will only
be energized as a result of an HPS or LPS fault. An HPS
fault is defined as the opening of a switch connected to
the HPS terminals for any amount of time. An LPS fault
is defined as the 60 psig low pressure switch open after
the bypass time. If any of these conditions are true, the
unit will de-energize the compressor and energize the
alarm. This will be defined as a lockout condition. To
reset a lockout condition, the pressure fault must be
corrected and the Y signal from the thermostat must be
cycled.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP34
www.DaikinApplied.com
Control
Figure 12: Compressor control module functional operation
10 SEC jumper is for servicing unit only.
Do not operate unit unattended with
jumper in the 10 second position!
T
DOM
6 SEC
3 SEC
X
Disconnect power to
WW* unit before moving
jumpers!
P7
P8
P9
R
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
C
Status LED
R
LPR-AL1701
T1
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
P10
P11
P12
Y
HPS
ASC
5 MIN
10 SEC
LPS
To prevent both compressors from
starting at the same time (resulting in
extremely high inrush current): The
delay on make timer for CCM1 is factory
set to 3 seconds. The delay on make timer
for CCM2 is factory set to 6 seconds.
Use lowest LPS bypass time
setting which allow unit to start and
operate. Do not set the jumper any
higher than necessary.
www.DaikinApplied.com
35
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
460-60-3, 575-60-3, Unit Sizes 360, 420
Note: See wiring diagram legend on "Legend" on page 38.
PDB
L3
1
L2
1
2
3
L1
4
GR
EGB
R-14
BL-14
BK-14
5
6
COMPRESSOR WIRE SIZE TABLE
*UNIT
MODEL
WIRE SIZE
7
360
420
8
CC1
*
BL*
BK*
R*
BL*
BK*
R-
F1
10 AWG
8 AWG
F2
F3
9
4 (L2)
10
BK
3 (L1)
L1
L2
L2
T2
L3
T3
L2
T2
L1
T1
5 (L3)
BL
TB6
T3
*
*
BK*
R*
BL*
BK*
R-
SPLICE
BK-14
(OPTIONAL)
T1
T3
CM2
T2
T1
SPLICE
G
CCH1
SPLICE
R-14
(OPTIONAL)
SPLICE
BK-14
G
CCH2
SPLICE
R-14
L3
CM1
T2
BK-14
SPLICE
R-14
PM
T3
BL-
L1 CC2 T1
R
11
L3
12
13
LINE
VOLTAGE
14
2
15
CLASS 2
60 HZ
TR2
24V
16
17
18
TB3
4
LTC
R
24 VAC
20
PR
Y
O
O
5
1
(OPTIONAL)
HP1
25
7
BK
O
CR1
COM1 NO1
BL
LP1
BL
(OPTIONAL)
26
Y
COPM1
M1
CC1
Y
M2
W
R
R
X
PR
31
CC1-A1
36
9
BK
1
COM2 NO2
BL
LP2
BL
(OPTIONAL)
37
COPM2
M1
M2
O
O
CC2
HPS
T1
T
W
R
41
PR
R
4,5,6,45
DOM
6 SEC
3 SEC
40
C
P7
P8
P9
39
W
R
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
38
Y
PK
3
BK
LTC
LPS
W
CCM2
LPR-AL1701
HP2
O
CR2
BK
35
O
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
O
34
4
9
ASC
7
TB5
BR
P10
P11
P12
33
LP4
BR
8
ALTERNATE
CR2
5 MIN
10 SEC
TB5
8
32
1,2,3,34,44
DOM
6 SEC
3 SEC
TB3
4
4
R
T
C
X
42
FL
43
44
45
46
47
TB3
4
TB3
4
R
R
C1L
CC1-A2
C2L
CC2-A
(WHEN USED)
G
R
R
COPM1
COPM2
T1
T1
G-14
P7
P8
P9
30
T1
W
28
29
HPS
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
27
Y
PK
3
BK
LTC
LPS
CCM1
LPR-AL1701
24
R
4
O
7
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
Y
7
BR
ASC
R
(OPTIONAL)
TB3
FS-S
(OPTIONAL)
TB4
TB3
10
SENSOR 2
P10
P11
P12
23
FS-L
5
BR
6
ALTERNATE
CR1
LP3
5 MIN
10 SEC
21
22
TB4
6
W
SEN 1 SEN 2
SENSOR 1
R
19
3
24V
24V
(OPTIONAL)
T2
T2
G
W
TB3
10
TB3
10
R
(OPTIONAL)
(OPTIONAL)
W
TB3
10
W
WIRING DIAGRAM # 0962I-2635A, REV. B
WW* 360, 420
460-3-60, 575-3-60
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
Note: See continuation of wiring diagram on page 37
36
www.DaikinApplied.com
Wiring Diagram
(Continued) 460-60-3, 575-60-3, Unit Sizes 360, 420
Note: Continuation of wiring diagram from page 36
48
50
53
54
55
56
57
11
TB1
R
51
52
LINE
VOLTAGE
2
49
R
PM
8
10
SPLICE
(OPTIONAL)
R
1
R
12
REMOTE SWITCH
TS-H
HEAT
OFF
14 TS-C
COOL
HEAT
TB1
S1
PK
S2
BL
(WHEN USED)
15
16
Y
TC
STG1
C
NO
17
STG2
C
NO
R
24V
CHR
4
CLASS 2
60 HZ
TR1
(WHEN REQ’D)
2
BK RVS1
(WHEN USED)
BK RVS2
13
TC
24
COM
BK
BK
SPLICE
(WHEN REQ’D)
BR
(OPTIONAL)
OFF
COOL
TB1
PK
58
BL
59
60
18
61
Y1
Y2
O
C
ALTERNATE
Y
CR1
JUMPER
O
CR2
19
BK
BR
1
64
65
66
www.DaikinApplied.com
20
TB2
A1
A2
CHR
BR
3
BR
A
A
CR1
CR2
B
B
23,63
34,64
52
(WHEN USED)
G-14
62
63
BR
PR
PR
ALTERNATE
CR1
CR1
4 CR2 6
9
4
9
6
6
CR2
6
WIRING DIAGRAM # 0962I-2635A, REV. B
WW* 360, 420
460-3-60, 575-3-60
PR
PR
37
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Wiring Diagram
Legend
460-60-3, 575-60-3, Unit Sizes 360, 420
LEGEND
FUNCTIONAL
LINE
DESCRIPTION
DESIGNATION NUMBER
C1L
44
OPTIONAL INDICATOR LIGHT - COMPRESSOR 1 ON
C2L
45
OPTIONAL INDICATOR LIGHT - COMPRESSOR 2 ON
CC1
27
COMPRESSOR NO. 1 CONTACTOR
CC1-A1
#
"CC1" AUXILIARY CONTACT NO. 1
CC1-A2
#
"CC1" AUXILIARY CONTACT NO. 2 (WHEN USED)
CC2
38
COMPRESSOR NO. 2 CONTACTOR
CC2-A
#
"CC" AUXILIARY CONTACT (WHEN USED)
CCM1
21
COMPRESSOR CONTROL MODULE NO. 1
CCM2
32
COMPRESSOR CONTROL MODULE NO. 2
CHR
60
CHANGEOVER RELAY (WHEN USED)
CCH1, CCH2
8,10
CRANKCASE HEATER # 1 , # 2
CM1
2
COMPRESSOR NO. 1
CM2
5
COMPRESSOR NO. 2
COPM1
27,46
COMPRESSOR NO. 1 OVERLOAD PROTECTION MODULE
COPM2
38,47
COMPRESSOR NO. 2 OVERLOAD PROTECTION MODULE
CR1
58
COMPRESSOR NO. 1 PILOT RELAY
CR2
59
COMPRESSOR NO. 2 PILOT RELAY
EGB
4
EQUIPMENT GROUNDING BAR
F1,F2,F3
7
FUSING - SEE FUSE TABLE
FL
43
OPTIONAL INDICATOR LIGHT - FAULT
FS-L
23
OPTIONAL FLOW PROVING SWITCH – LOAD COIL
FS-S
23
OPTIONAL FLOW PROVING SWITCH – SOURCE COIL
HP1
25
HIGH DISCHARGE PRESSURE CUTOUT SWITCH NO. 1
HP2
36
HIGH DISCHARGE PRESSURE CUTOUT SWITCH NO. 2
LP1
25
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 1 (CKT 1)
LP2
36
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 2 (CKT 2)
LP3
21
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 3 (CKT 1)
LP4
32
LOW SUCTION PRESSURE CUTOUT SWITCH NO. 4 (CKT 2)
LTC
17,25,36 LOW FLUID TEMPERATURE CUTOUT MODULE
PDB
1,2,3
POWER DISTRIBUTION BLOCK
PM
9,51
OPTIONAL POWER MONITOR
RVS1
52
REVERSING VALVE SOLENOID CKT 1 (WHEN USED)
RVS2
53
REVERSING VALVE SOLENOID CKT 2 (WHEN USED)
TB1
+
TERMINAL BOARD NO. 1
TB2
64,65
TERMINAL BOARD NO. 2
TB3
+
TERMINAL BOARD NO. 3
TB4
21
TERMINAL BOARD NO. 4
TB5
32
TERMINAL BOARD NO. 5
TB6
11
TERMINAL BOARD NO. 6
TR1
50
CONTROL TRANSFORMER NO. 1
TR2
15
CONTROL TRANSFORMER NO. 2
TC
54,54
TEMPERATURE CONTROLLER (OPTIONAL)
TS-C
55
AQUASTAT – COOLING (WHEN USED)
TS-H
54
AQUASTAT – HEATING (WHEN USED)
# SEE LINE NUMBER TO THE RIGHT OF CONTACTOR COIL ON WIRING DIAGRAM.
+ MULTIPLE LINE NUMBERS.
FUSE TABLE
FUSE NO.
VOLTS AC
AMPERES
CLASS
F1,F2,F3†
CC
600
+
† F3 IS USED ONLY WHEN OPTIONAL POWER
MONITOR IS FURNISHED.
+ 208/230 VOLT UNITS USE 2 AMPERES.
460 VOLT UNITS USE 1 AMPERES.
WIRE COLOR LEGEND
BK: BLACK
PK: PINK
BL: BLUE
PR: PURPLE
BR: BROWN
R:
RED
G:
GREEN
W: WHITE
O:
ORANGE
Y:
YELLOW
NOTES:
NUMBER PLACED AFTER DASH
FOLLOWING COLOR CODE INDICATES
WIRE GAGE. FOR EXAMPLE> BK-12 IS A
BLACK, 12 AWG WIRE.
NO NUMBER AFTER COLOR CODE
INDICATES 18 AWG WIRE. FOR
EXAMPLE> BK IS A BLACK 18 AWG
WIRE.
ASTERISK AFTER DASH FOLLOWING
COLOR CODE INDICATES REFERRAL TO
COMPRESSOR WIRE SIZE TABLE.
SYMBOL LEGEND
FACTORY WIRING
OPTIONAL FACTORY WIRING
FIELD WIRING
OPTIONAL FIELD WIRING
EARTH GROUND
CHASSIS (PANEL) GROUND
TERMINAL BOARD NO. 1 (TB1)
TERMINAL BOARD NO. 2 (TB2)
TERMINAL BOARD NO. 3 (TB3)
TERMINAL BOARD NO. 4 (TB4)
TERMINAL BOARD NO. 5 (TB5)
TERMINAL BOARD NO. 6 (TB6)
COIL
NORMALLY OPEN CONTACTS
NORMALLY CLOSED CONTACTS
IDENTIFIABLE TERMINAL
TIME DELAY
YES
1
THREE PHASE FIELD POWER SUPPLY PER UNIT RATING PLATE. MINIMUM CIRCUIT
AMPACITY AND MAXIMUM SIZE OF TIME-DELAY FUSE OR HACR-TYPE CIRCUIT BREAKER
PER UNIT RATING PLATE. PROVIDE DISCONNECTING MEANS AND EQUIPMENT
GROUNDING AS REQUIRED.
2
TRANSFORMER MAY HAVE TAPS FOR MULTIPLE SYSTEM POWER SUPPLY VOLTAGES.
BEFORE APPLYING POWER TO THE UNIT, ENSURE TRANSFORMER IS WIRED FOR
APPROPRIATE SYSTEM POWER SUPPLY. INSULATE SEPARATELY ANY UNUSED LEADS.
POLARITY IS NOT INDICATED. TYPICAL TRANSFORMER SHOWN. SEE TRANSFORMER
LABEL FOR LEAD COLOR CODING. A PUSH TO RESET FUSEHOLDER-TYPE THERMAL
CIRCUIT BREAKER IS MOUNTED ON THE TRANSFORMER. THE CIRCUIT BREAKER IS
WIRED IN SERIES WITH ONE SIDE OF THE TRANSFORMER SECONDARY WINDING.
NON-IDENTIFIABLE TERMINAL,
OTHER WIRE JUNCTIONS,
INCLUDING SCHEMATIC
13
“RVS1” AND “RVS2” ARE USED ONLY WITH WWR MODELS AND ARE ENERGIZED IN
COOLING MODE.
“RVS1” AND “RVS2” ARE NOT USED WITH WWC AND WWH MODELS.
14
AQUASTATS “TS-H” AND “TS-C” ARE NOT USED WHEN OPTIONAL FACTORY INSTALLED
TEMPERATURE CONTROLLER “TC” IS FURNISHED. TYPICAL AQUASTATS SHOWN.
AQUASTATS MAY BE SUPPLIED BY OTHERS OR ARE AVAILABLE AS AN OPTIONAL
ACCESSORY FROM THE FACTORY. MINIMUM PILOT DUTY RATING OF EACH POLE OF
AQUASTAT IS 24 VOLT-AMPERES @ 24 VOLTS AC WHEN CONNECTED AS SHOWN.
15
THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S1 TO TERMINAL Y1 ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
16
THIS WIRE CONNECTS DIRECTLY FROM TERMINAL S2 TO TERMINAL Y2 ON “TB1” WHEN
OPTIONAL TEMPERATURE CONTROLLER “TC” IS NOT FURNISHED.
17
WHEN OPTIONAL TEMPERATURE CONTROLLER “TC” IS FURNISHED, INSTALLER MUST
PROGRAM CONTROLLER. REFER TO TEMPERATURE CONTROL INSTALLATION
INSTRUCTIONS.
WITH REVERSE-CYCLE WWR UNITS, PROGRAM CONTROLLER AS ONE STAGE
COOLING AND ONE STAGE HEATING. STAGE 1 IS THE COOLING STAGE AND STAGE 2 IS
THE HEATING STAGE.
INSTALL SENSOR ON THE WATER INLET PIPE (LOAD COIL).
18
CONDUCTOR “O” REQUIRED WITH WWR REVERSE CYCLE UNITS.
CONDUCTOR “O” NOT USED WITH WWC COOLING AND WWR HEATING UNITS.
3
SEE FIGURE 1 ON SHEET 3 OF THIS DRAWING FOR BOARD LAYOUT FOR SENSOR
LOCATIONS, TEMPERATURE SETTING NOTE, AND SENSOR RESISTANCE VERSUS
TEMPERATURE GRAPH.
4
SEE FIGURE 2 ON SHEET 3 OF THIS DRAWING FOR COMPRESSOR CONTROL MODULE
OPERATION.
5
WHEN “FS-L” AND “FS-S” ARE NOT USED, THIS WIRE CONNECTS DIRECTLY TO
TERMINAL 5 OF “TB3”.
6
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 6 TO TERMINAL 7 ON "TB4".
7
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
19
“CHR” IS USED ONLY WITH “WWR” UNITS.
“CHR” IS NOT USED WITH “WWC” AND “WWH” UNITS.
8
WIRED AS SHOWN FOR OPEN LOOP OR HIGH TEMPERATURE CLOSED LOOP
APPLICATIONS. FOR LOW TEMPERATURE CLOSED LOOP APPLICATIONS, MOVE THIS
WIRE FROM TERMINAL 8 TO TERMINAL 9 ON "TB5".
20
9
WHEN OPTIONAL “LTC” IS NOT USED, THESE TWO WIRES ARE SPLICED TOGETHER.
COMPRESSOR RELAY CONTACTS ARE PROVIDED TO OPERATE AN EXTERNAL PILOT
DUTY LOAD (SUCH AS A PUMP RELAY COIL) WITH THE COMPRESSORS.
AN EXTERNAL LOAD POWERED BY TRANSFORMER “TR1” IN THE WW* UNIT MUST
NOT EXCEED 12 VA SEALED (96 VA INRUSH) @ 24 VOLTS AC.
EXTERNAL LOADS POWERED FROM AN EXTERNAL SOURCE ARE LIMITED TO
CLASS 2 CIRCUITS ONLY (30 VOLTS AC MAXIMUM). EXTERNAL LOAD
CHARACTERISTICS MUST NOT EXCEED 10 AMPS MAKE, 1 AMP BREAK. MAINTAIN
SEPARATION BETWEEN CLASS 2 CIRCUITS OF DIFFERENT SOURCES.
PROVIDE DISCONNECTING MEANS, EQUIPMENT GROUNDING, AND
OVERCURRENT PROTECTION AS REQUIRED.
10 WHEN “CHR” IS NOT USED, THIS WIRE CONNECTS DIRECTLY TO EITHER TERMINAL 1
OR Y-OUT ON “PM” --OR-- WHEN “PM” IS NOT USED, TO TERMINAL R ON “TB1”.
11 IF POWER MONITOR OUTPUT CONTACTS DO NOT TRANSFER WHEN POWER IS APPLIED
TO UNIT (BICOLOR LED GLOWS GREEN UNDER NORMAL CONDITIONS AND RED
DURING FAULT CONDITIONS):
1. VERIFY THAT ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT
VOLTAGE. IF ALL THREE PHASES ARE PRESENT AND ARE OF THE CORRECT VOLTAGE,
PHASE ROTATION MAY BE INCORRECT. PERFORM STEP 2.
2. DISCONNECT POWER TO THE WW* UNIT. VERIFY THAT POWER IS IN FACT
DISCONNECTED. SWAP ANY TWO OF THE THREE UNIT POWER SUPPLY WIRES. WHEN
POWER IS REAPPLIED, OUTPUT CONTACTS SHOULD NOW TRANSFER.
12 TYPICAL FIELD CONTROL WIRING SHOWN. ACTUAL FIELD WIRING MAY DIFFER FROM
WIRING SHOWN HERE. USE 18 AWG MINIMUM FOR FIELD 24 VOLT CONTROL WIRING.
TYPICAL REMOTE SWITCH SHOWN. REMOTE SWITCH MAY BE SUPPLIED BY OTHERS
OR IS AVAILABLE AS AN OPTIONAL ACCESSORY FROM THE FACTORY. MINIMUM PILOT
DUTY RATING OF EACH POLE OF REMOTE SWITCH IS 24 VOLT-AMPERES @ 24 VOLTS
AC WHEN CONNECTED AS SHOWN.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP38
WIRING DIAGRAM # 0962I-2635A, REV. B
WW* 360, 420
460-3-60, 575-3-60
www.DaikinApplied.com
Control
relays until the temperature of the sensor is 2.5 degrees
above the selected temperature. For example, you set
the temperature to 20°F. The output relays will de-energize when the sensor temperature drops below 20°F.
The control will re-energize the output relays when the
sensor temperature rises above 22.5°F. Additionally, the
control will monitor each individual sensor to make sure
it isn't broken or shorted. If either Sensor 1 or Sensor 2
fails short or open before or during operation, the control
will de-energize both output relays until the sensor is
repaired or replaced.
Optional Low Temperature Control
Board "LTC" – 460-60-3, 575-60-3,
Unit Sizes 360, 420
The control board is powered by 24 volts AC, 50/60 hertz
which is applied to the 24 VAC terminals. The control will
energize the output relays (COM 1 makes connection
with NO 1 and COM 2 makes connection with NO 2), only
if the temperatures of both Sensor 1 and Sensor 2 are
above the selected temperature which is 20°F or 35°F.
Note: Always disconnect power to WW* unit before moving
jumpers.
Table 10: LTC board sensor locations
While the output relays are energized, the control keeps
monitoring Sensor 1 and Sensor 2 to make sure that the
temperature of the sensors is always above the selected
temperture, the control will de-energize both ouput
Model
Sensor 1
Sensor 2
WCA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
WHA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
WRA
Liquid Out - Load Coil 1
Liquid Out - Source Coil 1
Figure 13: "LTC" board jumper settings
AL7815
NO 2
DISCONNECT POWER TO
WW* UNIT BEFORE MOVING
JUMPERS
COM 2
NO 1
COM 1
35F
20F
24 VAC
35F
20F
S2
SEN 1
The 20˚F settings are used only on
closed loop systems with antifreeze
solution.
S1
Jumper “S1” selects cutout temperature
setpoint for Sensor “SEN 1”.
Jumper “S2” selects cutout temperature
setpoint for Sensor “SEN 2”.
SEN 2
Figure 14: Thermistor temperature vs. resistance graph
Thermistor Temperature Vs. Resistance
Resistance (OHMS)
70000
60000
50000
40000
30000
20000
10000
0
10
20
30
40
50
60
70
80
90
100
110
Temperature (ºF)
www.DaikinApplied.com
39
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Control
Compressor Control Module
Functional Operation – 460-60-3,
575-60-3, Unit Sizes 360, 420
Power:
For proper operation there must always be 18 to 30 volts
AC present at the R and C terminals.
Time Delays:
1. Anti-short cycle: provides the compressor with
short cycle protection for a selectable time of 10
seconds (for servicing only) or 5 minutes (normal
operationalsetting). This feature is enabled upon
power loss to the circuit board, loss of the Y signal,
or the opening of a switch connected to the HPS or
LPS terminals. If the selecto shunt is not in place,
the circuit will default to a 5 minute anti short-cycle
delay.
2. Delay on make: Delays the turning on of the
compressor contactor for a selectable time of 3 or 6
seconds every time the Y signal coalls. If the selector shunit is not in place, the circuit will default to a 6
second delay on make.
3. Low Pressure Bypass: Allows time for the low side
pressure to build up enough pressure at start up for
the 60 psig low pressure switch to close. The circuit
will offer a selectable timing range of 90, 120, 180,
or 300 seconds. This time delay will start upon a
Y call from the thermostat. Should the 60 psig low
pressure switch still be open after the selected delay
expires, the compressor will de-energize and the
alarm will energize. This will be defined as an LPS
fault, (factory set for 90 seconds). If necessary to
increase the delay, select the smallest amount of bypass time delay that allows the compressor to start
and operate.
Note: The 60 psig low pressure switch is jumpered out in low
temperature closed loop system applications using
antifreeze solution.
Also note tht the 35 psig low pressure switch is connected in series with the high pressure switch to the
HPS terminals and is never bypassed.
Operation Of The HPS Terminals
Switches connected to the HPS terminals are connected
in series with the Y signal through the circuit board.
These switches are also connected in series witht the
T1 output in order to provide an immediate response if
a switch were to open. If a switch conncecte to the HPS
terminal should open, the status LED will blink once.
Operation Of The LPS Terminals
The 60 psig low pressure switch (brown leads) is connected to the LPS terminals in series with the Y signal
through the circuit board. The 60 psig low pressure
switch is connected in series with the Y signal to the processor only. This will allow the control to monitor the low
pressure switch status and initiate the bypass delay. If
the 60 psig low pressure switch should open, the status
LED will blink twice.
Normal Cycle
A normal cycle will begin with 24 VAC applied to the R
and C terminals on the circuit board. Once the control
is powered up, the processor will read the Y signal to
determine if it is calling. If it is calling and the switches
connected to the HPS terminals are closed, the delay on
make and low pressure bypass timers will initiate.
If a switch connected to the HPS terminals is open, the
control will enter the lockout mode. After the delay on
make time expires, the compressor contactor will energize. It will remain energized as the low pressure bypass
timer counts down.
If the 60 psig low pressure switch is closed after the
timer expires, the compressor will remain energized. If it
is still open, the control will enter the lockout mode.
If power is lost, or the Y signal is removed, or an HPS or
LPS terminal switch fault is detected while the compressor contactor is energized, the unit will initiate the anti
short-cycle delay.
Alarm/Lockout
The alarm terminal will output the R signal and will only
be energized as a result of an HPS or LPS fault. An HPS
fault is defined as the opening of a switch connected to
the HPS terminals for any amount of time. An LPS fault
is defined as the 60 psig low pressure switch open after
the bypass time. If any of these conditions are true, the
unit will de-energize the compressor and energize the
alarm. This will be defined as a lockout condition. To
reset a lockout condition, the pressure fault must be
corrected and the Y signal from the thermostat must be
cycled.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP40
www.DaikinApplied.com
Control
Figure 15: Compressor control module functional operation
10 SEC jumper is for servicing unit only.
Do not operate unit unattended with
jumper in the 10 second position!
T
DOM
6 SEC
3 SEC
X
Disconnect power to
WW* unit before moving
jumpers!
P7
P8
P9
R
300 P5
180 P4
120 P3
P2
90
P1
LPS BYPASS
SECONDS
C
Status LED
R
LPR-AL1701
T1
LED:
OFF = NO Y SIGNAL PRESENT
ON = Y SIGNAL PRESENT
1 BLINK = FAULT ON HPS TERMINALS
2 BLINKS = FAULT ON LPS TERMINALS
P10
P11
P12
Y
HPS
ASC
5 MIN
10 SEC
LPS
To prevent both compressors from
starting at the same time (resulting in
extremely high inrush current): The
delay on make timer for CCM1 is factory
set to 3 seconds. The delay on make timer
for CCM2 is factory set to 6 seconds.
Use lowest LPS bypass time
setting which allow unit to start and
operate. Do not set the jumper any
higher than necessary.
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41
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Circuit Diagrams
Model WHA
Load Coil = Heater-Condenser, Source Coil = Evaporator
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP42
www.DaikinApplied.com
Circuit Diagrams
Model WRA
Reverse Cycle, No Domestic Hot Water
Reverse Cycle, With Domestic Hot Water H.R. Coil
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43
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Circuit Diagrams
Model WCA
Load Coil = Chiller-Evaporator, Source Coil = Condenser, No Domestic Hot Water
Load Coil = Chiller-Evaporator, Source Coil = Condenser With Domestic Hot Water
H.R. Coil
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP44
www.DaikinApplied.com
Check, Test and Start Form
General Information
Customer Name_____________________________________ Dealer Name_______________________________________
Address____________________________________________ Address___________________________________________
__________________________________________________ __________________________________________________
__________________________________________________ __________________________________________________
Phone #____________________________________________ Phone #___________________________________________
Product Information
Unit Model #_____________________________________________________________
Unit Serial #______________________________________________________________
Source Coil Application
Ground Source
Open Well
Other__________________
Load Coil Application
Fan Coil Unit
Other______________________________________________
Radiant Htg/Clg Coils
Baseboard Radiation
Voltage______________ Amperage_________________ Phase_________________ Transformer Volts________________
Unit Function
Heating (WRA & WHA)
Entering
Load Liquid Temperature, °F
From fan coil unit, radiant coils,
baseboard radiation, etc.
Source Liquid Temperature, °F
From well, geothermal closed loop,
plate heat exchanger, etc.
Leaving
Diff (TD)
__________________
__________________ _________________
__________________
__________________ _________________
__________________
__________________ _________________
__________________
__________________ _________________
__________________
_________________ __________________
__________________
_________________ __________________
Cooling (WRA & WCA)
Load Liquid Temperature, °F
To fan coil unit, radiant coils,
baseboard radiation, etc.
Source Liquid Temperature, °F
From well, geothermal closed loop,
plate heat exchanger, etc.
Load Fluid Pressure FT. HD or PSIG
[Note 1 PSIG = 2.31 FT. HD]
Source Fluid Pressure
Load GPM_____________________ Source GPM___________________
Source Fluid
HA or HR = 500 x TD x GPM
Calculation __________ x
(Load) 500 or 485
Water
Anti-freeze
For Anti-Freeze solution = 485 x TD x GPM
__________ x __________ = ________________
TD
GPM
HA or HR
Check product performance table "Antifreeze Correction" on page 13 to determine if calculation is within 10% of table value.
www.DaikinApplied.com
45
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
General Service Guide
All models employ an electromechanical control system for maximum reliability.
Symptom
Possible Trouble
1. Noisy Operation.
a. Chattering contactor noise.
a.
2. Compressor will a. Lock Out Relay Open. a.
not start.
b. Loose electrical connections. b.
c. Refrigerant charge lost, low pressure
c.
cutout open. d. No control voltage to the compressor d.
contactor. e. Contactor pulled in, but compressor still
e.
won’t start.
3. Compressor starts but a. Run capacitor could be bad.
a.
hums and trips out on overload.
b. Voltage may be low.
b.
4. Compressor starts but
cuts out on low pressure control.
Turn thermostat off, then on.
Check all connections at contactor and compressor
terminal box for loose or burned connection on terminal.
Check for R-410A pressure.
Check for 24 volts across contactor coil.
If no voltage, check for thermostat circuit trouble
or for compressor safety controls open.
Check compressor overload circuit, contactor points, etc.
Check capacitor.
Check it.
c. Seized bearings on compressor.
c. Replace compressor.
a. Low liquid flow (heating cycle).
a. Check liquid flow.
b. Low refrigerant charge.
b. Remove refrigerant, repair leak and recharge.
c. Restriction in liquid refrigerant line.
c.
d. Low airflow (cooling cycle).
d.
e. Low pressure cutout may have incorrect e.
pressure function.
5. Compressor starts a. Condenser coils limed or restricted.
a.
but cuts out on high
pressure control.
b. Malfunctioning high pressure control.
b.
c. Reduced or lack of liquid flow.
c.
d. Reduced evaporator air flow
(heating cycle).
6. Compressor runs on a. Reversing valve may be defective.
heating cycle,
but does not heat.
Method of Finding
Check contactor points, check for adequate control voltage from transformer, and check control circuit for shorts or breaks, check thermostat.
Check and correct.
Check low pressure cutout for correct pressure.
Check it. (Open systems)
Check that the control is cutting out at the correct
pressure.
Check liquid.
d. Check air flow.
a. See that it has shifted.
b. Thermostat may be defective.
IM 1072-3 • WRA, WHA, WCA WATER TO WATER WSHP
Check pressures and look for frosting across
the restriction.
b. Check wiring diagram.
46
www.DaikinApplied.com
Replacement Parts List
#
Description
036
048
060
072
120
150
180
240
300
360
420
1
Expansion Valve*
564-672
564-672
564-670
546-671
564-670
564-671
561-664
564-673
564-676
564-676
564-676
Contactor
(Compressor)
841-040
841-040
841-040
841-040
841-039
841-039
841-072
841-072
841-072
841-155
2
841-162
841-039
841-039
841-039
841-039
841-021
841-021
841-039
841-039
841-039
841-072
841-065
3
Reversing Valve
564-677
564-508
564-609
564-508
564-508
564-608
564-608
564-574
564-574
564-589
564-589
4
Microprocessor
Board (comp ctrl)
872-089
(1)
872-089
(1)
872-089
(1)
872-089
(1)
872-089
(2)
872-089
(2)
872-089
(2)
872-089
(2)
872-089
(2)
872-089
(2)
872-089
(2)
5
Capacitor
(Compressor)
6
High Pressure
Switch (HP)
844-142
844-142
844-142
844-142
844-142
844-142
844-142
844-142
844-142
844-142
844-142
7
Low Pressure
Switch (LP1)
844-151
844-151
844-151
844-151
844-151
844-151
844-151
844-151
844-151
844-151
844-151
8
Fluid/Refrigerant
Coil S/W Copper
512-200
512-201
512-201
512-259
512-201
512-202
512-200
512-201
512-202
512-201
512-202
8
Fluid/Refrigerant
Coil S/W CU-NI
512-200
512-201
512-201
512-259
512-201
512-202
512-200
512-201
512-202
512-201
512-202
9
Transformer
846-056
846-056
846-056
846-056
846-129
846-129
846-129
846-129
846-129
846-129
846-129
10
Low pressure
switch (LP2)
844-150
844-150
844-150
844-150
844-150
844-150
844-150
844-150
844-150
844-150
844-150
11
230/3
Compressor
800-840
800-805
800-820
800-803
800-821
800-804
800-800
800-812
800-1014
800-814
800-914
12
Reversing Valve
Coil
874-209
(1)
874-209
(1)
874-209
(1)
874-209
(1)
874-209
(2)
874-209
(2)
874-209
(2)
874-209
(2)
874-209
(2)
874-209
(2)
874-209
(2)
13
Refrigerant
Charge R-410A lb.
2.8
3.5
4.4
5
5.5
8.5
16
20
32
35
40
* Where same valve is used in two or more units superheat settings may differ. Consult factory for valve with correct setting.
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47
WRA, WHA, WCA WATER TO WATER WSHP • IM 1072-3
Daikin Applied Training and Development
Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high
priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com
and click on Training, or call 540-248-9646 and ask for the Training Department.
Warranty
All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local Daikin Applied representative for warranty details. Refer to Form
933-430285Y. To find your local Daikin Applied representative, go to www.DaikinApplied.com.
Aftermarket Services
To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787).
To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.DaikinApplied.com.
Products manufactured in an ISO Certified Facility.
IM 1072-3
©2015 Daikin Applied (02/15) | (800) 432–1342 | www.DaikinApplied.com