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Installation Manual
IM 1083
Group: Unit Ventilator
Part Number: 106506250
Date: October 2013
Daikin Self-Contained Water Source Heat Pump Unit Ventilator
Model ARQ - Standard Range
Model ERQ - Extended Range
Model GRQ - Geothermal Range
R-410A Refrigerant, MicroTech II™ (“F” Vintage)
C
IMPORTANT!
Before beginning installation, please read this publication in its entirety.
Develop a thorough understanding before starting the installation procedure.
This manual is to be used as a guide. Each installation is unique, so only general topics are covered.
The order in which topics are covered may not be those required for the actual installation.
©2013 Daikin Applied • www.DaikinApplied.com • (800) 432-1342
Table of Contents
Nomenclature.........................................................................4
Data Plate - Specific Information......................................................4
Data Plate Location..........................................................................5
Models ARQ, ERQ & GRQ Self-Contained Floor Unit
Ventilator Installation ............................................................5
Water System Cleaning........................................................21
Make Piping Connections....................................................22
Water Coil Connections.............................................................22-23
System Balancing...........................................................................23
Receiving & Handling.......................................................................5
Visible Loss or Damage....................................................................5
Concealed Loss or Damage.............................................................5
Storage.............................................................................................5
Lifting Unit........................................................................................5
General Unit Data.............................................................................5
Making Control Connections...............................................24
MicroTech II Unit-Mounted DDC Control Components..............24-26
Safety.......................................................................................6
Electical Data........................................................................28
Size 024.........................................................................................28
Pre-Installation Considerations............................................6
Uncrate and Inspect the Unit Ventilator(s)........................................6
Typical Floor Unit Installation...........................................................7
Typical VentiMatic Shutter Installation..............................................7
Meeting IBC Seismic Requirements.................................................8
Wall Openings, Louvers & VenitMatic Shutter.....................9
Louver Installations with Typical Unit Arrangements..............10-12
16-5/8" Unit Depth..........................................................................10
21-7/8" Unit Depth..................................................................... 11-12
Typical Wiring Diagram........................................................27
DX Cooling with Electric Heat, Valve Control 460V, 3 Phase.........27
Size 040.........................................................................................28
Size 048.........................................................................................29
MicroTech II Unit Electical Connections...................... 30-31
MicroTech II Remote Wall-Mounted Sensor..............................32-35
ElectroMechanical Unit Wire Connections........................36
Installing (Optional) End Panel..................................... 37-38
Installing Louvers........................................................... 12-13
Piping Stub-up Details, 6' End Panel..............................................38
End Panel Assembly, 1" and 6" End Panel.....................................38
Installing the VentiMatic Shutter Assembly................. 14-15
Prepare Unit Ventilator for Start-up....................................39
Preparing to Move the Unit..................................................16
Post Installtion Checklist................................................................39
Oiling..............................................................................................39
Filters..............................................................................................39
Unit Ventilator Installation...................................................16
Before Sliding the Unit into Place...................................................16
Prepare for Start-up....................................................... 39-40
Removing Unit from Skid................................................................16
Installing Casters............................................................................16
Reversing Condensate Drain End..................................................17
Mounting Hole Locations & Dimensions....................................17-18
Operating Limits...................................................................19
Piping Considerations.........................................................20
IM 1083
Complete Check, Test and Start Procedure...................................40
Troubleshooting............................................................. 41-42
The in and outs of R-410A..............................................................41
Lubrication......................................................................................41
Charging.........................................................................................41
General Maintenance.....................................................................41
Troubleshooting Refrigeration Circuit.............................................42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 3 of 42
Table 1: Models ARQ, ERQ, GRQ Self-Contained Unit Ventilator (Floor Type) Data Plate - Specific Information
Field
1
Model
U
2
ARQ
3
4
5
6
7
8
9
10
11
12
13
14
15
6
024
H
G
12
Z
B1
AL
22
G
B
B
1
1. Product Category
U = Unit Ventilator
2. Product Identifier*
ARQ = SC - Standard Range WSHP 60°F EWT, Ultra Quiet
ERQ = SC - Extended Range WSHP 50°F EWT, Ultra Quiet
GRQ = SC - Geothermal Range WSHP 20°F EWT Ground Source,
Ultra Quiet
* End panels not included; Ordered as accessory, shipped separately boxed
3. Design Series
6 = F Design
4. Nominal Capacity, cubic feet per minute (cfm)
024 = 24,000 Btuh
040 = 40,000 Btuh
048 = 48,000 Btuh
5. Voltage, volts, phase, Hertz (v-Hz-ph)
C =208-60-1
D =208-60-3
G = 230-60-1
H = 230-60-3
K = 460-60-3
6. Cooling Options
G = Direct Expansion (DX)
H = Direct Expansion (DX) with refrigerant relief valve
7. Heating Options
8. Hand Orientation [Right (RH) Left (LH)]
Z = Not applicable
9. Controls (TC = Time Clock, CO2 = CO2 Sensor)
Basic Stand-Alone w/o TC
Basic Stand-Alone Master w/o TC
Basic Stand-Alone Slave w/o TC
Basic BACnet MS/TP w/o TC
Basic LonMark SCC w/o TC
Basic Metasys N2 Open w/o TC
Basic Stand-Alone w/ TC
Basic Stand-Alone Master w/ TC
Basic Stand-Alone w/o TC w/CO2
Basic Stand-Alone Master w/o TC w/CO2
Basic Stand-Alone Slave w/o TC w/CO2
Basic BACnet MS/TP w/o TC w/CO2
Basic LonMark SCC w/o TC w/CO2
Basic Metasys N2 Open w/o TC w/CO2
Basic Stand-Alone w/ TC w/CO2
Basic Stand-Alone Master w/ TC w/CO2
Expanded Stand-Alone w/o TC
Expanded Stand-Alone Master w/o TC
Expanded Stand-Alone Slave w/o TC
Expanded BACnet MS/TP w/o TC
Expanded LonMark SCC w/o TC
Expanded Metasys N2 Open w/o TC
Expanded Stand-Alone w/ TC
Expanded Stand-Alone Master w/ TC
Page 4 of 42
Expanded Stand-Alone w/o TC w/CO2
Expanded Stand-Alone Master w/o TC w/CO2
Expanded Stand-Alone Slave w/o TC w/CO2
Expanded BACnet MS/TP w/o TC w/CO2
Expanded LonMark SCC w/o TC w/CO2
Expanded Metasys N2 Open w/o TC w/CO2
Expanded Stand-Alone w/ TC w/CO2
Expanded Stand-Alone Master w/ TC w/CO2
Leading Stand-Alone w/o TC
Leading Stand-Alone Master w/o TC
Leading Stand-Alone Slave w/o TC
Leading BACnet MS/TP w/o TC
Leading LonMark SCC w/o TC
Leading Metasys N2 Open w/o TC
Leading Stand-Alone w/ TC
Leading Stand-Alone Master w/ TC
Leading Stand-Alone w/o TC w/CO2
Leading Stand-Alone Master w/o TC w/CO2
Leading Stand-Alone Slave w/o TC w/CO2
Leading BACnet MS/TP w/o TC w/CO2
Leading LonMark SCC w/o TC w/CO2
Leading Metasys N2 Open w/o TC w/CO2
Leading Stand-Alone w/ TC w/CO2
Leading Stand-Alone Master w/ TC w/CO2
Electromech w/2-Pos Damper for Remote T'Stat
Electromech w/2-Pos Damper w/Unit Mtd. ACO
Electromech w/2-Pos Damper w/Unit Mtd. MCO
10. Discharge
00 = None
12 = Low Electric Heat, 3-element
13 = High Electric Heat, 6-element
B1 =
B2 =
B3 =
B4 =
B5 =
B6 =
B7 =
B8 =
B9 =
BA =
BB =
BC =
BD=
BE =
BF =
BG=
E1 =
E2 =
E3 =
E4 =
E5 =
E6 =
E7 =
E8 =
E9 =
EA =
EB =
EC =
ED =
EE =
EF =
EG =
L1 =
L2 =
L3 =
L4 =
L5 =
L6 =
L7 =
L8 =
L9 =
LA =
LB =
LC =
LD =
LE =
LF =
LG =
44 =
45 =
46 =
AK= 21-7/8" Unit, Top Bar Grille Discharge
AL = 16-5/8" Unit, Top Bar Grille Discharge
AM= 21-7/8" Unit, Top Bar Grille Discharge, 2" Step
AN= 21-7/8" Unit, Top Bar Grille Discharge
AP = 21-7/8" Unit, Top Bar Grille, Full Adapter Back
11. Return Air (RA) / Outside Air (OA)
22 = RA Bottom Front / OA Rear Duct Collar
24 = Recircl RA Bottom Front - no RA/OA Dampers
12. Power Connection
G = Box w/Switch
13. Color
B = Putty Beige
G = Soft Gray
I = Antique Ivory
W = Off White
14. SKU
B = Standard Delivery
15. Product Style
1
Field-Installed Accessories may accompany Unit Ventilator(s), or may be
shipped separately. These may include: Aluminum Louvers; Aluminum
Grilles; Caster Kit; End Panels; Spare Filters; MicroTech II Remote
Wall Sensors (temperature); End of Cycle DDC Valve. See instructions
shipped with accessories and install according to these and the plans.
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Models ARQ, ERQ, GRQ SelfContained Floor Unit Ventilator
Installation
Figure 1: Data Plate Location
Lifting Unit
A forklift or other lifting device is needed to install this product.
WARNING
Make sure lifting equipment can handle the weight of the unit
safely. Personal injury may result if improper lifting and moving
methods are used. (See table 2 for approximate shipping weights)
CAUTION
Use 72" length forklift tines, short tines will damage the unit
bottom. Improper handling can damage internal components.
Do not stand the unit on end or stack (see figure 2 & 3)
Figure 2: Stack Units Maximum 2 High as Shown
Receiving & Handling
This product was carefully packed and thoroughly inspected
before leaving the factory. Responsibility for its safe delivery was
assumed by the carrier upon acceptance of the shipment. Claims
for loss or damage sustained in transit must therefore be made
upon the carrier, as follows:
2 high
Visible Loss or Damage
Any external evidence of loss or damage must be noted on the
freight bill or carrier’s receipt, and signed by the carrier’s agent.
Failure to adequately describe such external evidence of loss or
damage may result in the carrier’s refusing to honor a damage
claim. The form required to file such a claim will be supplied by the
carrier.
Correct
Lifting Points
Incorrect
Figure 3: Forklift Lifting Requirements
Concealed Loss or Damage
Concealed loss or damage means loss or damage which does not
become apparent until the product has been unpacked. The
contents may be damaged in transit due to rough handling even
though the carton may not show external damages. When the
damage is discovered upon unpacking, make a written request for
inspection by the carrier’s agent within fifteen (15) days of the
delivery date. File a claim with the carrier since such damage is the
carrier’s responsibility.
Storage
If equipment is stored for any length of time before installation, it should
remain in its shipping packaging in a clean, dry, climate controlled area.
4'
6'
Unit Overall Dimensions (without end panels)
024 = 86"w × 30"h × 16⅝"d or (21⅞"d w/Adapter Back)
040 = 98"w × 30"h × 16⅝"d or (21⅞"d w/Adapter Back)
048 = 110"w × 30"h × 16⅝"d or (21⅞"d w/Adapter Back)
Table
2: General Unit Data
Models ARQ, ERQ, GRQ
024
040048
Nominal Airflow – CFM (L/S)
1000 (472)
1250 (590)
1500 (708)
No. of Fans3
4
4
Room
Dia. – In. (MM)
8.12 (206)
8.12 (206)
8.12 (206)
Fan Data
Width - In. (MM)
8.25 (210)
8.25 (210)
8.25 (210)
Room Fan Motor Horse Power1/4
1/4
1/4
Nom. Size – In. (MM)
10 × 48½ × 1 (254 × 1232 × 25) 10 x 60½ × 1 (254 × 1537 × 25)
10 × 36½ × 1 (254 × 927 × 25)
Filter Data
Area – FT2 (M2)
3.37 (0.31)
4.20 (0.39)
5.08 (0.47)
Quantity1 1 2
Approx. Ship Weight – Lbs. (KG)
Refrigerant Charge – Oz.
IM 1083
690 (310)
84
720 (325)
130
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ 760 (340)
100
Page 5 of 42
Safety
Follow all safety codes. Wear safety glasses and work gloves.
Use a quenching cloth for brazing operations. Have a fire
extinguisher available. Follow all warnings and cautions in these
instructions and attached to the unit. Consult applicable local
building codes and National Electrical Codes (NEC) for special
requirements.
Recognize safety information. When you see a safety symbol on
the unit or in these instructions, be alert to the potential for
personal injury. Understand the meanings of the words DANGER,
WARNING, and CAUTION. DANGER identifies the most serious
hazards that will result in death or severe personal injury;
WARNING means the hazards can result in death or severe
personal injury; CAUTION identifies unsafe practices that can
result in personal injury or product and property damage.
Improper installation, adjustment, service, maintenance, or use
can cause explosion, fire, electrical shock, or other conditions
which may result in personal injury or property damage. This
product must be installed only by personnel with the training,
experience, skills, and applicable licensing that makes him/her “a
qualified professional HVACR installer.”
DANGER
Disconnect all electrical power before servicing unit.
Electrical shock will cause severe injury or death.
WARNING
Hazardous Voltage!
Use copper conductors only. Unit terminals are not designed to
accept other types of conductors. Failure to do so may cause
damage to the equipment.
CAUTION
Personal injury hazard. Wear protective gloves to avoid possible
cuts and abrasions from exposed edges. Avoid contact with sharp
edges.
WARNING
Cleaning agents may cause serious damage to internal
components, such as aluminum coils and electronic controls,
etc. Do not operate unit ventilator while building maintenance
cleaning agents are in use.
Pre-Installation Considerations
■ Before beginning installation, please read this publication in its
entirety.
■ Directions given in this bulletin for right and left sides assume a
position facing the indoor side of the unit ventilator.
■ Before beginning installation, if provided, remove the protective
plastic film covering the unit painted panels.
WARNING
Plastic packaging is a suffocation hazard, dispose of properly. Keep
away from children.
To be sure the correct unit ventilator(s) is/are installed in the
correct location(s), the installer must check the packing list and unit
identification/tagging number(s) against the plans. Further, the unit data
plate, (see figure 1) located on the lower right end of the unit ventilator,
contains specific information of standard components as listed in Table 1.
Unit comes with an allen wrench and four (4) lagging washers in the
envelope placed in the end compartment of the unit (figure 2).
Install this product in accordance with good engineering practices
and workmanship, following these general instructions, plus the jobspecific AAF®-HermanNelson® submittal drawings provided for specific
dimensions, unit arrangements, controls and electrical details, pipe stub-up
locations, etc. Applicable tools for lifting, hook-up of piping, electrical
and insulation are required.
Uncrate and Inspect the Unit Ventilator(s)
Carefully remove the packaging, remaining alert to any signs of shipping
damage. Be careful not to discard components that may be included with
the packaging. (You may want to retain some or all of the packaging
to provide jobsite unit location information and temporary protection
for the unit ventilator after installation.) Be sure to dispose of plastic
packaging and protective cardboard properly, in accordance with local
recycling rules and guidelines.
If unit is damaged, file a claim with the carrier. Notify the local AAF®HermanNelson Unit Ventilator representative immediately.
Prior to unit installation, be sure that the exterior wall openings and
louvers, as applicable, are ready and in accordance with the job
plans.
Figure 4: Shipping Envelope Contents - Located in right
end compartment of unit
WARNING
“Polyolester Oil, commonly known as POE oil, is synthetic oil
used in many refrigeration systems. POE oil, if ever in contact
with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe
causing environmental stress fractures.
Although there is no PVC/CPVC piping in this product, please
keep this in mind when selecting piping materials for your
application, as system failure and property damage could result.”
Page 6 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Pre-Installation Considerations – Typical Floor Unit Installation
Figure 5: Typical Unit Ventilator Installation and Louver Details (see installation section for typical warnings and cautions)
Internal Column For
Wall Bracing (By Others)
Screws or Bolts (by others)
Refrigerant Pipe Tunnel
Unit Gasket
1" End Panel w/Cut Out
Lintel (by others)
Weep Holes
Unit Gasket
Caulk Top And
Two Sides Of Louver
Unit Insulating Blanket
Caulk
Bird Screen
Back Of Unit
Unit Outside Air Opening
Weep
Holes
Unit Bottom Gasket
Seal Under Unit
Sealed Mortar Bed
Floor
Typical VentiMatic™ Shutter Installation
Figure 6: Typical VentiMatic Shutter Assembly Installation (see installation section for typical warnings and cautions)
VentiMatic Shutter Assembly
Building Wall
Louver
Outside
Unit Ventilator
Outdoor Air Opening
Outside
Roomside
Roomside
Typical VentiMatic louver installation with shelving.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 7 of 42
Pre-Installation Considerations
Meeting IBC Seismic Requirements
Daikin unit ventilators can be specified, as follows, to meet International
Building Code seismic requirements:
In addition to all seismic requirements for IBC Certification listed
elsewhere in the project specification, submittals for these units
include:
• All components included in these unit ventilators are designed,
manufactured and independently tested, rated and certified to meet
the seismic compliance standards of the International Building
Code.
1. A Certificate of Compliance from the Independent Certifying
Agency clearly indicating that components supplied on this
project are included in the component manufacturer’s Certificate
of Compliance.
• Components designated for use in systems that are life safety,
toxic, high hazard, combustible or flammable meet the on line,
anchorage and load path requirements for life safety as defined in
IBC sections 1621.1.6, 1621.3.3,1707.7.2. and IBC Commentary,
Volume II, section 1621.1.6, IBC notes pertaining to the release of
hazardous material.
2. Clear installation instructions including all accessory components
that are part of the overall component installation.
DETAIL
Y
• All components used as part of a system other than the above meet
as a minimum, all load path and anchorage standards for components
as outlined in IBC section 1621.3.3 & 1707.7.2.
1-1/2" O.D.
galvanized
steel pipe
• All completed component assemblies are clearly labeled for field
inspection. Seismic Compliance Labels include the manufacturer’s
identification, designation of certified models, definitive information
describing the product’s compliance characteristics, and the
Independent Certifying Agency’s name and report identification.
X
Top mounting hole
on unit frame
Gasket on back of unit
Building structure or
support column
*
Note: Dimensions “X” and “Y” to be determined by installing
contractor based on fit-up requirements of job.
Figure 7: Typical IBC Seismic Installation
*A Molly or Toggle bolt may be necessary if voids in the building
structure or support columns are present.
(4) - 3/8" galvanized nut with
washer (by others), attach from
inside unit end compartments.
Tighten nut until steel pipe is
compressed between unit and
building structure or column.
Lintel
(by others)
(4) - 1-1/2" O.D. x (dimension “X”),
galvanized steel pipe (by others),
gives rigidity to the unit in relation
with the building structure (see detail).
(4) - 3/8" diam. x (dimension “Y”) galvanized
threaded rod (by others) - align with unit
mounting holes, and set into building structure
mortar or structural support column (see detail).
Page 8 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Wall Openings, Louvers, and VentiMatic
Shutter
Figure 9: Horizontal and Vertical Blade Louvers, Without
Flanges With Grille or With Flange Without Grille
Vertical Louver with Flange, without Grille
Self-Contained Floor Models ARQ, ERQ, GRQ are typically installed
in front of a wall opening containing a properly sized louver that is
designed to let in outside air while preventing water (such as rain) from
getting past the louver and into the unit itself. A weather-tight seal
keeps unwanted air and moisture from entering the occupied space. See
Figures 8 through 23, and table 1 for various louver details.
Figure 8: Horizontal and Vertical Blade Louvers, Without
Flange, (see Caution below for louver blade orientation
and drainage)
Bird Screen On Side Toward Unit
Flange
Outside Air
Horizontal Louver
without Flange,
with Grille
Flange
Louver drain lip
Outside Air
Grille/Louver with weep hole
Bottom
Horizontal Blade Louver
Rear of Horizontal Blade Louver with Birdscreens and Flange
Bird Screen On Side Toward Unit
VentiMatic™ Shutter Assembly
Outside Air
Vertical Blade Louver
CAUTION
Locate Drain Lip at bottom of vertical louver to allow proper
drainage. For horizontal louvers, the louver blades should face
down for proper drainage. Bird screen should always be on
side toward unit.
In many installations, an AAF®-HermanNelson® VentiMatic Shutter
Assembly is specified. See figure 10. This one-way shutter is a
continuously variable, gravity actuated, room exhaust vent that operates
in direct response to positive static pressure. It opposes any airflow into
the room and allows a slight positive pressure.
It is important that the VentiMatic shutter and unit ventilator louvers
are mounted on the same wall. This neutralizes the effect of the wind.
Forcing excess air into the room through the unit ventilator louver
overcomes the same wind pressure that works to keep the VentiMatic
shutter closed. This prevents room air exhausting from the room through
the VentiMatic shutter.
Figure 10: VentiMatic Shutter Assembly
VentiMatic Shutter
Outside
Louver
Roomside
Relief Air
Note: Birdscreen and louver are shipped in one (1) piece.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 9 of 42
Louver Installation With Typical Unit Arrangements – 16⅝" Unit Depth
Figure 11: The 16⅝˝ (422mm) Deep Unit with Open
Refrigerant Pipe Chase and Floor Level Outdoor Intake
Louver Location
Unit Refrigerant Piping
Figure 13: Above Floor Level Outdoor Air Intake with
Accessory Closed Refrigerant Pipe Chase
Lintel (By Others)
Insulated Closure
Plate Accessory
Unit Refrigerant Piping
Intake Louver
Lintel
(By Others)
Not Less Than 3"
Not More
Than 28"
Louver
1"
(25mm)
Floor Line
Sealed Cement
Mortar; Pitch
Away From Unit
Sealed Cement
Mortar; Pitch Away
From Unit
Provide
Drainage
Important: Gasket sealing
surface is required.
Figure 12: 16⅝" (422mm) Deep Unit with Open Refrigerant
Pipe Chase & Above-Floor-Level Outdoor Intake Louver
Application with Chased Wall
Lintel
(By Others)
1"
(25mm)
Floor Line
Important: Gasket sealing
surface is required.
Figure 14: Floor Level Outdoor Air Intake With Window
Below Unit Top and 9˝ “Finished” (Painted) Accessory
(Insulated) Closed Refrigerant Pipe Chase
Painted Insulated Closure Plate Accessory
Unit Refrigerant Piping
Sash
Unit Refrigerant Piping
Lintel (By Others)
Louver
Not Less
Than 3" (76mm)
Not More
Than
21" (533mm)
Sealed
Cement Mortar;
Pitch Away
From Unit
Provide Drainage
Intake Louver
1"
(25mm)
Floor Line
Important: Gasket sealing
surface is required.
Sealed Cement
Mortar;Pitch Away
From Unit
1"
(25mm)
Floor Line
Important: Gasket sealing
surface is required.
CAUTION
Accumulated moisture can cause property damage if not properly
drained. Installing contractor must provide such drainage.
Page 10 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Louver Installation With Typical Unit Arrangements – 21⅞" Unit Depth
Figure 15: 21⅞" (556mm) Deep Full Adapter Back Unit and
Floor Level Outdoor Intake Louver Location
Figure 17: 21⅞" (556mm) Partial Adapter Back Unit with
Window Below Unit Top (2" Step-Down) and Floor Level
Outdoor Intake Louver Location
Unit Refrigerant Piping
2" Finished Step-Down Top
Sash
Lintel
Unit Refrigerant Piping
(By Others)
Lintel
Louver
Field Supplied
Water Piping
1"
(25mm)
(By Others)
Floor Line
Intake Louver
Sealed Cement
Mortar;Pitch
Away From Unit
Not More
Than 28"
Important: Gasket sealing
surface is required.
Figure 16: 21⅞" (556mm) Deep Full Adapter Back Unit
with High Louver Application
Lintel (By Others)
Sealed Cement
Mortar;Pitch Away
From Unit
Floor Line
Important: Gasket sealing
surface is required.
Figure 18: 21⅞" (556mm) Deep Partial Adapter Back Unit
with Open Refrigerant Pipe Chase and Floor Level
Outdoor Intake Louver Location
Unit Refrigerant Piping
Louver
Gasket Seal
Sealed Cement
Mortar;
Pitch Away From Unit
Not More
Than 28"(711mm)
Unit Refrigerant Piping
Field Supplied
Water Piping
Lintel
(By Others)
Floor Line
Field Supplied
Water Piping
Intake Louver
Important: Gasket sealing
surface is required.
Not More
Than 12"
Sealed Cement
Mortar;Pitch Away
From Unit
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ 1"
(25mm)
Floor Line
Important: Gasket sealing
surface is required.
Page 11 of 42
Louver Installation With Typical Unit
Arrangements – 21⅞" Unit Depth
Figure 19: The 21⅞” (556mm) Deep Full Adapter Back
Unit with Closed Refrigerant Pipe Chase, Ducted with Top
Intake
Window Sash
“Goose Neck”
Insulated Duct (By Others)
Intake Louver
Duct Collar (By AAF)
Unit Refrigerant Piping
Field Supplied
Water Piping
Floor Line
Important: Gasket sealing surface is required.
Installing Louvers
Typical Installation Methods
If the fresh air opening has not yet been made, see figures 9 through 16
for the recommended locations and the job-specific plans for the exact
location. Follow local codes.
Cut the wall opening so that it is slightly larger than the louver being
installed. For dimensions, see Table 3. If the opening is already there,
measure to be sure there is a minimum of 3/8" (9mm) clearance around
all sides. For masonry installations, a lintel must be installed above
all louvers.
In thick wall applications, the portion of the wall between the louver
and the unit is the outside air plenum. Line this plenum area with 3/8"
(9 mm) mortar or other suitable material. In some applications, the job
specifications require a metal sleeve connection between the louver and
the unit. If using such a sleeve, properly caulk it to ensure a weathertight seal. This is critical in preventing freeze-ups, cold drafts, and air
infiltration. Be sure the wall is smooth, square, and provides a suitable
mating surface.
Table 3: Recommended Wall Openings For Wall Louvers
Maximum Number of
VentiMatic
Recommended
VentiMatic Shutters
Shutter(s)
Wall Openings
B C
Which Can Be Mounted Air Capacity
For Wall Louvers
On Standard Louver
Maximum
L/s
Length Height 24" Shutter 36" Shutter cfm
48"
51"
485⁄8"
107⁄8"
2
0
1000472
(1219) (1295) (1222) (267)
60"
63"
(1524) (1600)
72"
75"
(1829) (1905)
605⁄8"
107⁄8"
(1527) (267)
725⁄8"
197⁄8"
(1832)(495)
1
1
1250590
0
2
1500
708
Before setting the louver, construct a sloping, sealed cement mortar base
to drain unwanted moisture to the outside, (see figure 20). Be sure the
mortar base is 1" (25mm) thick at the unit and tapers toward the louver.
The mortar at the unit also acts as a backing against which the open
cell gasket of the unit itself can seal. This is critical in preventing water
leaks and air leaks under the unit. Be sure the sealed cement mortar
base is smooth and flush with the interior wall.
If it is not possible to construct a sloping mortar base, then field-supplied
flashing is required. See figure 21. The flashing should terminate flush
with the exterior of the building. Place a bead of caulk under the flashing
to prevent moisture from wicking back to the unit. Do not caulk the
joint between the louver and the flashing. This joint is designed to let
unwanted moisture escape.
Figure 20: Typical Louver Installation with Sloping Sealed
Cement Mortar Base
Wall
Louver
Sealed Cement
Mortar;
Pitch Away
From Unit
No
Caulk
Unit
Unit Gasket
1" (25mm)
Floor
Page 12 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Figure 21: Typical Louver Installation with Flashing
Louver
Wall
Figure 22: Suggested method for fastening louver
(without flange) inside wall opening
Unit
Louver
(Bird Screen Not Shown)
Flashing
(By Others)
Unit Gasket
Exterior
No
Caulk
1" (25mm)
Caulk
(By
Others)
Floor
Angle Iron
(by others)
Room Side
Wall Opening
CAUTION
Personal injury hazard. Wear protective gloves to avoid possible
cuts and abrasions from exposed edges. Avoid contact with sharp
edges.
See figures 8 through 24. Before setting the louver, be sure the drain
lip (vertical louver) are at the bottom, horizontal louver blades face
down and the bird screen is towards the unit. See figures 23 and 24.
Place a heavy bead of caulk along the top and the two vertical sides of
the louver, leaving the bottom uncaulked so that if moisture gets into
the area between the louver and the unit, it can drain to the outside,
unrestricted.
If the louver is supplied with flanges, (see figure 23) place an additional
bead of caulk on the inside of the top and side flanges that come in
contact with the building facade. Do not caulk the bottom flange. Place
the louver in the opening and push it tight against the supplied building,
fastening it to the exterior of the building using fasteners (by others)
appropriate to the installation. Seal the top and sides with a waterproof
caulk to make it weather-tight. Do not caulk the bottom of the louver;
doing so might trap unwanted moisture behind the flange. (See figure 23)
If the louver is supplied with no flanges, (see figure 24) place the louver
in the opening so that it is recessed a minimum 1/16" (2mm) beyond
the building facade or as directed in the architectural plans. If specified
in the plans, secure the louver in the wall using mechanical fasteners
(supplied by others) appropriate to the installation. (See figure 22 for
suggested fastening). With the louver solidly in place, run a bead of
caulk around the perimeter of the louver to seal it weather-tight. Do
not plug the weep holes (horizontal louver) or the drip line (vertical
louver). This might restrict the flow of unwanted moisture to the outside
(see figure 24)
See figure 21. If flashing was used instead of the sloping mortar base,
caulk the flashing where it meets the inside of the opening between the
louver and the unit. This helps prevent moisture from getting under the
flashing and into the room.
IM 1083
Figure 23: Vertical or Horizontal Blade Wall Intake Louver
(Flanged) (Vertical Blade Shown)
Caulk
(top and 2 Sides)
Lintels (By Others)
Louvers
Bird Screen
Sealed Cement Mortar
Pitched Away from Unit
Toward Louver
Drain Holes
(Do Not Block)
1" Minimum
Flange
(4 Sides)
Figure 24: Vertical or Horizontal Blade Wall Intake Louver
(Recessed Without Flange) (Horizontal Blade Shown)
Lintels (By Others)
Louvers
Bird Screen
Sealed Cement Mortar
Pitched Away from
Unit Toward Louver
Drain Holes (Do Not
Block With Mortar or
Caulking Materials
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ 1" Minimum
Page 13 of 42
Installing the VentiMatic Shutter
Assembly
Figure 26: Single VentiMatic Shutter & Wall Louver
The AAF®-HermanNelson® VentiMatic Shutter Assembly is a one-way
shutter. It is a continuously variable, gravity-actuated, room exhaust
vent that operates in direct response to positive static pressure, opposing
any airflow into the room resulting in a slight positive pressure.
The VentiMatic Shutter Assembly is mounted on an installed wall louver.
For larger units with 100% ventilation air dampers, two VentiMatic
Shutters may be mounted side by side on the same louver. See figure 27.
41⁄8"
(105mm)
Outside
When installing VentiMatic Shutter(s) on the wall louver, make sure
all moving parts are free to operate unobstructed and placed level
and plumb for proper operation. If optional steel interior wall grille is
furnished, install as shown in Figure 25.
Figure 25: Louver , VentiMatic Shutter, Interior Wall Grille
Details, Dimensions
237⁄8" (606mm)
or
357⁄8" (911mm)
2" (51mm)
Decorative Exterior Grille Also Available (See Note 2, above)
(Bird Screen not shown)
Figure 27: Two VentiMatic Shutters & Wall Louver
Aluminum Wall Louver
Assembly with Bird Screen
(See Note 1)
Cement Mortar
7"
(178mm)
3
3'' (76mm)
Outside
⁄4" (19mm) Approx.
B
see table 4
Steel Interior Wall Grille
(Optional) See Note 3
Bird
Screen
Steel
VentiMatic
Shutter
Assembly
B
see table 4
103⁄8"
(264mm)
The size and appearance of the wall louvers with or without optional
grilles used with the unit ventilator, and the VentiMatic Shutter, are
identical.
As Directed
By Architect
Aluminum Wall Louver
Assembly With Bird Screen
(See Note 1)
3" (76mm)
Not
Less
Than 9"
(229mm)
VentiMatic
Shutter
Assembly
C
see table 4
125⁄8"
(314mm)
103⁄8"
(264mm)
Center Cover
Decorative Exterior Grille Also Available (See Note 2)
(Bird Screen not shown)
3
Do Not Block Drain
Holes With Caulk or
Mortar
⁄4" (19mm) Approx.
Cement Mortar
Figure 28: Louver, VentiMatic Shutter, Interior Wall Grille
Details, Dimensions
Notes:
1. Horizontal blade wall louver shown. Vertical blade wall louver also
available with Ventimatic shutter.
2. Optional exterior grille matches unit ventilator wall louver in material
and design. Mounted on wall louvers.
3. Optional steel interior wall grille should be used to conceal the
interior wall opening whenever the Ventimatic shutter is not located
behind shelf cabinets. Hardware to mount the interior wall grille is
not included.
CAUTION
For proper operation, the VentiMatic shutter assembly must
be mounted on the same wall as the unit ventilator louvers to
neutralize wind effect.
Table 4: Recommended Wall Openings For Wall Louvers
Maximum Number of
VentiMatic
Recommended
VentiMatic Shutters
Wall Openings
B C
Which Can Be Mounted
For Wall Louvers
On Standard Louver
Length Height 24" Shutter 36" Shutter
48"
51"
485⁄8"
107⁄8"
2
0
(1219) (1295) (1222) (267)
60"
63"
605⁄8"
107⁄8"
1
1
(1524) (1600) (1527) (267)
5
7
72"
75"
72 ⁄8"
19 ⁄8"
0
2
(1829) (1905) (1832)(495)
Page 14 of 42
Shutter(s)
Air Capacity
Maximum
cfm
L/s
1000472
1250590
1500
708
As Directed
By Architect
Cement Mortar
7"
(178mm)
3/4" (19mm) Approx.
Steel Interior Wall Grille
(Optional) See Note 3
Bird
Screen
Not
Less
Than 9"
(229mm)
12⅝"
(314mm)
C
see table 4
3/4" (19mm) Approx.
Cement Mortar
Do Not Block Drain Holes
With Caulk or Mortar
Note:
1. Horizontal blade wall louver shown. Vertical blade wall louver
also available.
2. The optional exterior grille shown mounted on the wall louver.
3. The optional steel interior wall grille is used to conceal the
interior wall opening whenever the Ventimatic shutter is not
located behind shelf cabinets. Hardware to mount the interior
wall grille is not included.
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Installing VentiMatic™ Shutter
Figure 29: Typical VentiMatic™ Shutter Assembly Installation
Louver
VentiMatic Shutter Assembly
Building Wall
The VentiMatic shutter assembly mounts
on the same wall as the unit ventilator
louver, to neutralize wind effect.
Outside
Closed Shelf Storage Cabinet
with Slotted Kickplate
Cabinet
Slotted Kickplate
Outside
Roomside
Roomside
Typical VentiMatic louver installation with shelving.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 15 of 42
Preparing to Move the Unit
Move the unit ventilator to the correct location. See Table 2, page 5
for approximate shipping weights.
Carefully remove unit ventilator from wood skid. Be sure to properly
dispose of the skid in accordance with local recycling rules and
guidelines.
Removing Unit from the Skid
Remove fasteners at each end which hold the unit to the skid and
carefully slide the front of the unit off the skid (1). Tip unit forward
until the bottom of the slotted front kickplate is resting on the floor (2).
Lift rear of unit off of the skid by tipping unit forward while supporting
the unit from the front, until it is possible to slide skid out from under
the unit. GENTLY LOWER the rear of the unit to the floor (3).
Unit Ventilator Installation
Before setting the unit ventilator in position, be sure that field-supplied
electrical connections are in place, de-energized and in accordance
with the plans.
Before Sliding the Unit into Place
Sliding of this unit to the wall can be made easier with the assistance
of Caster Kit P/N 105629001 (Figures 31). A piece of cardboard placed
under the unit will make this job easier and reduce marring the floor.
(Do not leave cardboard under unit after installation.)
Be certain that the field-supplied electrical connections are in place,
de-energized and in accordance with the plans.
Installing Casters
If the unit was ordered with the optional caster wheels, install them
as follows:
Figure 30: Removing Unit from Skid
1. Carefully slide the front of the unit off the front of the skid.
1.
2.
3.
4.
Approx. 10"
5.
6.
7.
2. While supporting unit from the front, slowly tip unit forward until
bottom of kickplate is resting on floor. Lift skid slightly and GENTLY lower the rear of the unit to the floor while pulling skid back
(DO NOT LET THE UNIT DROP).
Remove the left and right front access panels.
With the one caster (left end), ensure the caster is fully up (turn
bolt clockwise to raise, counterclockwise to lower).
Locate in the left end compartment the slots and bolt location.
Insert the tines of the caster channel into the slots. Securely bolt
the front to the unit front rail.
Repeat for the right caster wheels (2).
Slowly engage the casters by lowering the bolt. Make all caster
adjustments equally before raising the unit.
When full engaged, the unit will roll forward up to the wall.
When the unit is in position, reverse the procedure and remove
the caster kit. Save the caster kit for future unit servicing or
replacement.
Figure 31: (Optional) Indoor Section Caster Installation
Raises and lowers casters (two
on compressor
end of unit)
Raises and
lowers caster
Kickplate
Tip forward until kickplate
rests on floor
Caster mounting cut-out
Counter-clockwise to lower
Clockwise to raise
Left Caster
Right Caster
Page 16 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Reversing Condensate Drain End
CAUTION
Personal injury hazard. Wear protective gloves to avoid possible
cuts and abrasions from exposed edges. Avoid contact with
sharp edges.
NOTICE
The drain pan has two (2) connections on each end; a standard
drain connection and an overflow connection.
Models ARQ, ERQ and GRQ condensate drain connection is on the
left end (with static equalizer cover). If the job dictates that the drain
connection be made at the right end, perform the following procedure
to change the drain connection from left to right end:
1. Remove the two screws holding the static equalizer cover in place
(Figure 32). It will be necessary to cut the seal between the static
equalizer cover and the drain pan.
2. Remove the upper plate and lower bracket from each end of the
unit, as shown in figure 32. This is done by removing the screws
in each with a 1/4 inch nut driver.
Figure 32: Condensate Drain Pan Connection Located on
Left End
3. Reinstall the brackets on the opposite end of the unit.
4. Reinstall the static equalizer cover into the right end drain pan
and secure to the upper plate. Use silicone sealer and seal all gaps
between the equalizer cover where it meets the drain pan
5. Verify the drain connection is open on the low (drain) right end
only. The open drain connection stub-outs at the high end of the
drain pan (left end), must be sealed water tight with silicone sealer
or similar.
To Clean the Drain Pan
1. Remove the shallow and deep upper plates from the unit (see figures
32 and 33).
2. Spray water into the drain pan on the high end to wash debris to
the low end (drain end).
3. Remove any debris, making sure that the drain holes are not
obstructed.
4. Wipe the drain pan with a cloth.
5. Reinstall the upper plates.
Mounting Hole Locations & Dimensions
Move the unit ventilator into position against the wall surface. Check
to see that the unit ventilator is level from end to end and back to front.
Using a 4' level is recommended.
Figure 34: Setting The Unit Ventilator In Place
Deep Upper Plate
1/4" Hex Head
Screws
Remove
moldings
behind unit
Static Equalizer
Cover
Drain Pan
CAUTION
Overflow Connection
Standard Drain Connection
Figure 33: Right End of Drain Pan (Non- Drain End)
Shallow
Upper Plate
Leakage of outdoor air wastes energy, causes drafts and erratic
unit ventilator operation. Check the following details: At the correct
unit ventilator location, examine the wall surface. Make sure that it
is smooth, plumb, and perpendicular to the floor. The seals on the
rear of the unit ventilator will take up the small irregularities found in
normal masonry construction. If the wall is irregular or has mullions,
install furring strips to provide a flush surface against which the unit
ventilator can seal. If there are moldings on the floor/wall line, omit
them behind the unit ventilator. Provide a sealing surface at the floor
line. Install a seal pad under the unit to prevent air leakage. Install
the unit ventilator against a wall made of non-combustible material,
and on a floor made of non-combustible material. Floor must be level,
unbroken and structurally strong to support the unit.
CAUTION
Drain Pan
Unit must be anchored to an internal wall column or other suitable
support (see figure 5, page 7)
Right End Drain
Pan Label
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 17 of 42
Refer to figure 35 and attach the unit ventilator to the wall through
the four (4) mounting holes provided, using field-supplied fasteners
appropriate to the wall construction and the washers provided in the
brown envelope with these instructions. Envelope also contains allen
wrench to provide access to unit. Push the unit ventilator tight to the wall
structure so that the outdoor air seals are compressed. Secure the wall
fasteners to prevent the unit ventilator from moving and tipping over
Table 5: Mounting Holes Dimension “C”
Unit Size
C
024
60" (1524 mm)
040
72" (1829 mm)
048
84" (2134 mm)
Figure 35: Unit Mounting Holes Locations
Unit Mounting Holes
131/2″
65/16″
67/8″
Page 18 of 42
C
187/8″
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Operating Limits
Table 6: Air Limits - °F (English units)
Standard Range
Geothermal Range
UnitsUnits
CoolingHeatingCoolingHeating
Min. Ambient Air50°F50°F40°F40°F
Normal Ambient Air
80°F70°F
80°F70°F
Max Ambient Air100°F
85°F100°F
85°F
Min. Entering Air 1,250°F50°F50°F40°F
Normal Entering Air db/wb 80/67°F70°F
80/67°F70°F
Max Entering Air db/wb 1,2 100/83°F
80°F
100/83°F 80°F
Table 7: Air Limits - °C (SI units)
Min. Ambient Air
Normal Ambient Air
Max Ambient Air
Min. Entering Air 1,2 Normal Entering Air db/wb
Max Entering Air db/wb 1,2 Standard Range
Geothermal Range
UnitsUnits
CoolingHeatingCoolingHeating
10°C
10°C
5°C
5°C
27°C
21°C
27°C
21°C
38°C
29°C
38°C
29°C
10°C
10°C
10°C
5°C
27/19°C
21°C
27/19°C
21°C
38/28°C
27°C
38/28°C
27°C
Table 8: Water - °F (English units)
Min. Entering Water 1,2 Normal Entering Water
Max Entering Water
Standard Range
Geothermal Range
UnitsUnits
CoolingHeatingCoolingHeating
55°F55°F30°F20°F
85°F70°F77°F40°F
110°F90°F110°F90°F
Additional Information For Initial
Start-up
Standard Range units
Units are designed to start-up in an ambient of 50°F (10°C), with
entering air at 50°F (10°C), with entering water at 70°F (21°C), with
both air and water flow rates used in the ISO 13256-1 rating test, for
initial start-up in winter.
ote: This is not a normal or continuous operating
N
condition. It is assumed that such a start-up is for the
purpose of bringing the building space temperature
up to occupancy temperature setpoint.
Geothermal Range units
Geothermal heat pump unit ventilators are designed to start-up in an
ambient of 40°F (5°C), with entering air at 40°F (5°C), with entering
water at 25°F (-4°C), with both air and water at flow rates used in the
ISO 13256-1 rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for the
purpose of bringing the building space temperature
up to occupancy temperature setpoint.
Table 9: Water - °C (SI units)
Standard Range
Geothermal Range
UnitsUnits
Cooling Heating Cooling Heating
Min. Entering Water 1,2 13°C
13°C
-1°C
-6°C
Normal Entering Water29°C
21°C
25°C
4°C
Max Entering Water43°C
32°C
43°C
32°C
1
At ISO 13256-1 flow rate.
Maximum and minimum values may not be combined. If one 2
value is at maximum or minimum, the other two conditions may not exceed the normal condition for standard units. Extended range
units may combine any two maximum or minimum conditions, but
not more than two, with all other conditions being normal conditions.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 19 of 42
Piping Considerations
Figure 36: Condensate Disposal Trapping Detail
1. All units should be connected to supply and return piping in a
two-pipe reverse return configuration. A reverse return system is
inherently self-balancing and requires only trim balancing where
multiple quantities of units with different flow and pressure drop
characteristics exist in the same loop. Check for proper water
balance by measuring differential temperature reading across the
water connections. To insure proper water flow, the differential flow
should be 10°F to 14°F (5°C to 8°C) for units in cooling mode.
A direct return system may also work acceptably, but proper water
flow balancing is more difficult to achieve and maintain.
2. The condenser water or loop piping can be steel or copper.
3. Supply and return runouts usually join the unit via short lengths of
high pressure flexible hose which are sound attenuators for both
unit operating noise and hydraulic pumping noise. One end of the
hose should have a swivel fitting to facilitate removal for service.
Hard piping can also be brought directly to the unit. This option is
not recommended since no vibration or noise attenuation can be
accomplished. The hard piping must have unions to facilitate unit
removal.
4. Some flexible hose threaded fittings are supplied with sealant
compound. If not, apply Teflon tape to assure a tight seal.
Note: Do not over-torque fittings. The maximum
torque without damage to fittings is 30 foot pounds.
If a torque wrench is not available, use as a rule of
thumb, finger-tight plus one quarter turn.
Drain Pan (Left End)
C
A
B
7/8" I.D. Clear Plastic
Table 10: Condensate Drain Trap & Static Pressure
Standard Static Pressure
High Static
A BC
1¼"
5/8"
2¾"
1½"
3/4"
3⅛"
9. Do not locate any point in the drain system above the drain connection
of any unit.
10.Automatic flow controlled devices must not be installed prior to
system cleaning and flushing.
11.A high point of the piping system must be vented.
12.Check local code for the need for dielectric fittings.
5. Supply and return shutoff valves are required at each conditioner.
The return valve is used for balancing and should have a “memory
stop” so that it can always be closed off but can only be reopened
to the proper position for the flow required.
6. No unit should be connected to the supply and return piping until
the water system has been cleaned and flushed completely. After
the cleaning and flushing has taken place, the initial connection
should have all valves wide open in preparation for water system
flushing.
7. Condensate drain piping can be steel, copper or PVC or CPVC.
8. The condensate drain hose must be trapped. The hose must be
pitched away from the unit not less than 1⁄4" per foot. The unit
drain pan has a 7/8 inch O.D. drain connection to accommodate
the condensate drain hose.
Page 20 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Water System Cleaning
Figure 37: Connections for flushing system piping
CAUTION
Prior to first operation of any unit, the water circulating
system must be cleaned and flushed of all construction dirt
and debris.
If the unit is provided with water shutoff valves, either electric or pressure operated, the supply and return run outs
must be connected together at each unit location. This will
prevent the introduction of dirt into the water circulating
system. Additionally, pressure operated valves only open
when the compressor is operating.
NOTICE
Return Runout
Supply Runout
Mains
Flexible Hose
Runouts Initially
Connected Together
It is Daikin’s policy not to make recommendations on water
treatment. It is the responsibility of the user to check that
the water supply to the units is free of contaminants or corrosive agents, chemicals or minerals. The general contractor or owner should contact a local water treatment company regarding water treatment. A fouled closed loop water
system will lead to premature component failure.
The system water piping must be thoroughly cleaned and flushed in
order to remove dirt, chips or other foreign matter before connecting
to the heat pumps or starting the system. Since the initial condition of
the system water may be such that dirt or other foreign matter may clog
or otherwise damage balancing and shutoff valves, it is recommended
that these valves be omitted during the cleaning of the water system
as outlined in the following procedure.
The entire system should be filled with clean, fresh water and properly
vented. Piping leaks should be repaired as early in this procedure as
they are discovered. With valves positioned to bypass the heat pumps,
heat rejector and the supplementary water heater, the pump should be
started to circulate water through the system. Check strainers frequently
and clean as often as needed. If the water is extremely dirty or murky,
it is sometimes helpful to continuously flush, using the system pump,
until the water being flushed out of the pipe loop has become clear. To
flush in this manner requires care to be certain that make-up water is
being added fast enough to replace what is being flushed out. This can
be accomplished by opening the make-up water bypass valve around
the automatic pressure reducer valve, adjusting the manual valve so
that the pump suction pressure gauge continues to indicate the same
positive pressure that existed before the manual drain and make-up
valves were opened. Continue for at least two (2) hours.
To complete the cleaning, fill the system with fresh water, adding a
cleaning agent such as trisodium phosphate (TSP).
Bypass valves at the heat rejector and supplementary water heater
should be adjusted for normal operation. Disconnect all power to the
heat rejector and heat pump so that they will not operate while the
system is being cleaned. The cleaning solution should then be circulated
throughout the system, with water heater controls temporarily adjusted
to raise the solution temperature to about 105°F to 110°F. DO NOT
allow the temperature to rise above 110°F, especially in systems using
plastic pipe. Alternate operation of the primary and standby pumps,
and circulate the warm solution for several hours. Then turn off the
water heater and pump, completely drain the system and refill with
fresh water. Repeat the cleaning process only if there is indication of
foreign matter still in the system, or if a test of the water indicates that
it is even slightly acid.
The water should be slightly alkaline, with a pH no higher than 8.0 and
no lower than 7.0, which is neutral. Traces of TSP or similar cleaning
agent will tend to leave the water in a slightly alkaline condition
provided all acid forming substances such as pipe coatings or flux
have been properly cleaned out. A tight system requiring little or no
make-up water, with neutral or slightly alkalline water, will remain in
proper operating condition indefinitely. The addition of chromates or
other corrosion inhibitors is NOT recommended, except when ethylene
glycol is added for freeze protection. IN ALL CASES, A WATER
QUALITY EXPERT SHOULD BE RETAINED TO MAKE A
WATER ANALYSIS.
Note: Contact a local water treatment company to
confirm water clarity prior to unit operation.
CAUTION
Units must be checked for water leaks upon initial water
system start-up. Water leaks may be a result of mishandling or damage during shipping. Failure by the installing
contractor to check for leaks upon start-up of the water
system could result in property damage.
CAUTION
Water/refrigerant heat exchanger fouling will interrupt water
flow resulting in localized freezing.
Install a 16-20 mesh strainer in the water line upstream of
the exchanger.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 21 of 42
Make Piping Connections
CAUTION
Be sure the hot and chilled water supply and return system are
thoroughly flushed and cleaned before connecting piping to
the unit ventilator. Debris in the lines can damage the unit. See
"Water System Cleaning".
Water Coil Connections
Hook up water piping in accordance with Figure 38.
Figure 38: Water Supply and Return Connections (Unit
Size 040 & 048 Shown)
For All Systems
Water Return
3/4" FPT Fitting
Be sure to install the control valve(s) on the correct unit ventilator.
Indiscriminate mixing of valves in the field can result in valves
improperly sized for the desired flow rate, which can result in poor
operation and coil freezeups. Install control valve so there is at least 2"
(51mm) minimum clearance to remove the actuator from the valve body.
Be certain that the control valve is installed correctly, with its orientation
vertical. Valves should be installed at least 5° off center.
CAUTION
Water Supply
3/4" FPT Fitting
Be certain that the control valves are installed with the proper
port orientation to provide proper flow and fail safe operation.
Incorrect installation can result in improper unit operation, and/or
the possibility of coil freeze-up.
With future servicing considerations in mind, use standard, field-supplied
shutoff valves and union connections; this permits easy removal of the
coil or control valve if servicing is required.
Figure 39: Typical Piping Through the Floor, Inside
Cabinet (Unit Size 024 Shown)
WARNING
While brazing, have an extinguisher readily available. Wear
appropriate eye and hand protection. Ensure all areas with
shared ventilation have ample fresh air ventilation.
Proper ventilation is required for brazing. When brazing, be sure to
protect unit ventilator components from overheating damage (melting
insulation, also damage to valves, wiring, electronics, sensors, etc.).
Ensure proper insulation of supply and return piping. Proper insulation
prevents loss of unit ventilator capacity, overheating of end compartment,
and / or moisture dripping.
The piping to and from the unit must be protected from outside air and
freeze conditions. The piping must be suitably insulated for condensation
or heat lose or gain. Penetrations entering the unit end compartments
must be fitted/sealed for unit integrity.
Heat
Exchanger
Coil
Flexible Return
Hose with Flow
Controller/Ball
Valve
Flexible Supply
Hose with
Y-Strainer/Ball
Valve
CAUTION
Failure to install water piping to coils properly can result in
improper unit operation and coil freeze-ups.
NOTICE
Use piping shut off valves and connection unions for future
servicing to the coil supply and return stubs, instead of hard
piping. This permits easy removal of the coil or control valve if
servicing is required.
Page 22 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Figure 40: Typical Piping Through Grommets in Back of
Unit
4.
5.
6.
7
8.
9.
System Balancing
The recommended method, and the one most commonly used, for
balancing a system is called "proportionate balancing." Figure 41
shows a water system consisting of reverse return mains feeding three
branch mains. Branch A and Branch C are designed as reverse returns,
while Branch B is designed as a direct return upfeed riser. Each of the
branch circuits has a balancing valve in the line going back to the system
return main. In addition, each unit has a balancing valve in its return
line. The prescribed method of proporationate balancing is as follows:
1.
2.
3.
Assume Coil A-1 has the lowest proportionate flow rate, A-2 the
next lowest, and so on. Leaving the balancing valve to Coil A-1
wide open, begin to throttle the balancing valve on A-2 until the
two coils have the same proportionate flow within an allowed
tolerance. (This usually is set by the balancing contract at around
5 percent.) Proportionate balance now has been achieved between
these two coils.
Proceed to Coil A-3 and establish proportionate balance between
it and Coil A-2 by the same procedure. Coil A-2 need not be read.
It will change in direct proportion to the change in A-2 and will
remain in balance with it.
Adjust the balancing valve in Coil A-4 until it is in proportionate
balance with Coil A-3. Likewise, bring Coil A-5 into proportionate
balance with Coil A-4. This is the end of Branch A. All coils on
this branch will be proportionately balanced and any increase or
decrease in the total system GPM, or the branch, will increase or
decrease the GPM at each coil proportionately. They will remain
in balance with one another.
By the same process, achieve a proportionate balance of all coils
on Branches B and C.
The next step is to balance the branches. To do this, select at random
one coil on each of the three branches. Use the same procedure
as for coil balancing and proportionately balance the branches
against one another, using the selected coils. Note the balancing
valve on the lowest proportionately flowing branch will be left
wide open.
The final step in the procedure is to adjust the flow from the pump
to the system to bring all coils to their design flow rate. As was
previously discussed, this can be done by imposing additional
resistnace at the pump by means of a balancing valve and throttling
the system back until the flow rates are equal to those called for
by the design, or decreasing the output of the pump
Open all valves fully.
Beginning with Branch A, take readings to determine the
GPM flowing to each unit in the branch.
Determine the ratio of the actual/design flow for each of
the coils in Branch A. This is called the proportionate flow
rate. For instance, if Coil A-1 had a design flow rate of 10
GPM and the measured flow rate was 15 GPM, then its
proportionate flow rate would be 1.5.
Figure 41: Typical System Balancing Circuit
Typical water system consisting
of reverse return mains feeding
branch circuits
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 23 of 42
Making Control Connections
MicroTech II™ Unit Mounted DDC Control
Components – Models ARQ, ERQ, and GRQ
1. MicroTech II Unit Ventilator Controller (UVC): (Located
Beneath the Local User Interface Panel). Factory mounted and
run tested, microprocessor-based DDC control device capable
of complete Standalone unit control, Master/Servant control or
incorporated into a building-wide network using an optional plugin communication module. The UVC contains a microprocessor
that is preprogrammed with the application code required to
operate the unit. The UVC supports up to 6 analog inputs,
12 binary inputs, and 9 binary outputs. The UVC EXP I/O
board supports up to 4 additional analog inputs and 8 additional
binary outputs. Master/Servant units have the controller factory
configured and installed for a local peer-to-peer network between
these units (network wiring between these units needs to be field
installed). Optional network communication is provided via plugin communication modules that connect directly to the UVC.
2. Communication Module (optional): Plug-in network
communication module that is attached to the UVC via a 12-pin
header and 4 locking standoffs. Available communication modules:
•
Building Automation and Control Network (BACnet®) Master
Servant/Token Passing (MS/TP) - Allows the UVC to interoperate with systems that use the BACnet (MS/TP) protocol
with a conformance level of 3. Meets the requirements of ANSI/
ASHRAE 135-1995 standard for BACnet systems. (See IM 731
for specific installation instructions of BACnet module).
•
LonWorks® compliant Space Comfort Controller (SCC) –
Supports the LonWorks SCC profile number 8500_10. (See IM
729 for specific installation instructions of LonWorks module).
•
Metasys N2® Open – Provides N2 Open network communication
capability to the UVC. (See IM 730 for specific installation
instructions of Metasys N2 module).
4.
Tenant Override Switch: Provides a momentary contact closure
that causes the unit to enter the “tenant override” operating mode
for a set time period (default = 120 minutes).
5.
Time Clock (TC) (optional on standalone units only): Factory
mounted 7-day/24 hour, digital time clock with up to twenty (20)
programs to sequence the unit ventilator through occupied and
unoccupied modes in accordance with a user programmed time
schedule.
6. External Signal Connection Plugs: (Located beneath
the Local User Interface Panel), three (3) multi-pin plugs
are factory provided and pre-wired with short wire whips
that are capped (they must remain capped if not used).
Provided for field wiring of :
•
Remote Wall-Mounted Temperature Sensor (optional accessory).
•
External Input Signals (by others): unoccupied, remote shutdown,
ventilation lockout, dew point/humidity (night time operation),
or exhaust interlock signals
•
External Output Options (by others): lights on/off, fault indication
signal, exhaust fan on/off or auxiliary heat signal.
7. Motor Speed Transformer: (Located beneath the Local User
Interface Panel). Multi-tap auto-transformer provides multiple
fan motor speed control through the LUI.
8. Unit Main Power “On-Off” Switch (SW1): Disconnects the
main power to the unit for servicing or when the unit is to be shut
down for an extended period of time.
Figure 43: Unit Main Power “On-Off” Switch (SW1)
3. Local User Interface (LUI): The LUI provides a unit mounted
interface which indicates the current unit operating state and can be
used to adjust the unit ventilator operating parameters (operating
mode, temperature set points, fan speed and occupancy mode).
The LUI features a 2-digit display, 7 keys (1 key is hidden), and 9
individual LED indicators. See “Local User Interface” for further
details.
Figure 42: MicroTech II Sensor and Component Locations (Top View) for AR, ER & GR
Page 24 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
9.Fuse(s): Fan motor and controls have the hot line(s) protected by
factory installed cartridge type fuse(s).
10. Control Transformer: 75 VA 24-volt NEC Class 2 transformer
for 24 volt power supply. (Located behind the motor transformer).
11. Outdoor Air/Return Air Damper Actuator (A1): Direct coupled,
floating point (tristate) actuator that spring returns the outdoor air
damper to the closed position upon a loss of power.
12. Low Refrigerant Temperature Sensor (S4): The S4 sensor is
provided on all units with a direct expansion (DX) cooling coil.
It is located on the right hand side of the air coil “u-bend”.
13. Room Temperature Sensor (S1): The unit mounted sensor is
located in the sampling chamber (front, center section) where
room air is continuously drawn through for prompt response
to temperature changes in the room. A Remote Wall Mounted
Temperature Sensor is also available for remote room temperature
sensing. (optional accessory).
14. Discharge Air Temperature Sensor (S2): The sensor is located on
the second fan from the right to sense discharge air temperatures.
Figure 44: MicroTech II Control Boards (with LonWorks
Module Installed)
Terminal Connections
Plug-in Control Module
15. Outdoor Air Temperature Sensor (S3): The sensor is located in the
outdoor air section of the unit before the outdoor air damper. With
network applications, the unit mounted sensor can be overridden
by a remote sensor through the network.
16. Outdoor Air Humidity Sensor (S8) (optional): Unit mounted
humidity sensor for units using Expanded outdoor enthalpy
economizer or Leading Edge indoor/outdoor, true enthalpy
comparison economizer. The sensor is located in the outdoor air
section of the unit before the outdoor air damper. With network
applications, the unit mounted sensor can be overridden by a
remote sensor through the network.
17. Room Humidity Sensor (S6) (optional): Unit mounted humidity
sensor for units capable of active dehumidification or with units
using Leading Edge indoor/outdoor, true enthalpy comparison
economizer. The sensor is located in the sampling chamber (front,
center panel) where room air is continuously drawn through for
fast response to humidity changes in the room. With network
applications, the unit mounted sensor can be overridden by a
remote sensor through the network.
18. CO2 Sensor (S7) (optional): Unit mounted, single beam absorption
infrared gas sensor with a sensing range of 0 – 2000 ppm and
voltage output of 0 to 10 VDC (100 ohm output impedance). The
Pitot Tube sensing device is located in the unit ventilator’s return
air stream. The optional CO2 sensor is used with the UVC’s
Demand Control Ventilation feature to vary the amount of outside
air based on actual room occupancy. With network applications,
the unit mounted sensor can be overridden by a remote sensor
through the network.
19. Water Out Temperature Sensor (S9): The water out temperature
sensor is factory wired. The sensor must be field-installed and
insulated (by others) and located on the return connection of the
plate heat exchanger.
20. Water Coil DX Temperature Sensor (S5): The S5 sensor is
factory wired, installed and insulated. It is located on the lower
left refrigerant line of the plate heat exchanger leading to the
expansion valve.
NOTICE
Not all external signal options can be used simultaneously and
may not be available on all software models. Refer to the “UVC
Input and Output Tables” in IM 739 for available options.
Figure 45: Top View - Local User Interface Compartment
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 25 of 42
Economizer Control Capabilities
Basic – Compares the inside and outside air temperatures using item
16 (Room Temperature Sensor) and item 18 (Outdoor Air Temperature
Sensor) to determine if outdoor air can be used for “free”, economizer
cooling operation.
Expanded - Compares the inside and outside air temperatures using item
16 (Room Temperature Sensor) and item 18 (Outdoor Air Temperature
Sensor) and calculates the enthalpy of the outside air relative humidity
using item 19 (Outdoor Air Humidity Sensor) to determine if outdoor
air can be used for “free”, economizer cooling operation.
Leading Edge – True enthalpy comparison economizer that compares
the inside and outside air temperatures using item 16 (Room Temperature
Sensor) and item 18 (Outdoor Air Temperature Sensor) and compares
the enthalpy of the inside and outside air relative humidity using item
19 (Outdoor Air Humidity Sensor) and item 20 (Room Humidity
Sensor) to determine if outdoor air can be used for “free”, economizer
cooling operation.
Local User Interface (LUI)
The built-in LUI touch pad (See Figure 45, item 3) has a 2-digit LED
display that indicates the current unit operating state. See OM for unit
type, for details of operation. The touch pad will “digitally display”:
• The room set point temperature
• Current Room Temperature (With certain buttons held in place)
• Any fault code for diagnostics at the unit (With certain buttons
held in place)
The LUI has a built in menu structure (Hidden Key and Password
protected) with 7 keys (1 key is hidden) and 9 individual LED indicators
to adjust the unit ventilator operating parameters shown below.
Figure 46: Local User Interface (LUI)
MicroTech II
FAN ONLY
TM
HIGH
COOL
MED
HEAT
LOW
AUTO
AUTO
MODE
FAN
FUNC
ON/
STOP
Operating Mode States (4)
• Heat - Heating and economizer operation only
• Cool – Cooling and economizer operation only
• Fan Only – Fan operation only
• Auto – Unit automatically switches between heating,
cooling and economizer operation to satisfy the room load
conditions. The current unit state is also displayed.
Fan States (4)
• High (constant speed - compressor on high stage)
• Medium (constant speed - compressor on low stage)
• Low (constant speed - compressor on low stage)
• Auto (part load, variable air) – Varies the fan speed automatically
to meet the room load conditions whether the unit is in heating,
cooling or economizer mode. The current fan speed is also
displayed. During low load or normal operation (about 60% of the
time) the fans will operate at low speed. When the load increases
to an intermediate demand the fans automatically shift to medium
speed. At near design or design load conditions, the fans will
operate on high speed. A 10-minute delay between speed changes
is incorporated to minimize the awareness of these changes. The
outdoor air damper will index based on the fan speed to maintain
the required minimum cfm (cubic feet per minute) of ventilation
air.
Occupancy Modes (4)
• Occupied – Normal, daytime operation where the unit maintains
the room set point.
• Unoccupied – Night set back operating mode in which the unit
responds to a new room set point and cycles to maintain the
condition. The fan comes on when heating or cooling is needed
and runs until the load is satisfied. The outside air damper is closed
during this mode. With direct expansion (DX) cooling units, when
a cooling load is satisfied by the refrigerant system, the compressor
is de-energized and the Unit Ventilator indoor fan continues to run
for a fixed period of time to remove possible frost buildup on the
evaporator coil.
• Stand By Mode – The unit ventilator maintains the stand by mode
set point temperature with the outside air damper closed. The fan
runs continuously unless it is configured to cycle in response to
the room load.
• Bypass Mode – By depressing the Tenant Override Switch
(Item 4) the unit is placed back into the Occupied Mode for a
predetermined time (default of 120 minutes). This time can be set
in 1-minute increments from 1 minute to 240 minutes through the
Unit Ventilator Service Tool or a network.
Page 26 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ DISCONNECT ALL ELECTRICAL
POWER BEFORE SERVICING UNIT
TO PREVENT INJURY OR DEATH
DUE TO ELECTRICAL SHOCK.
DANGER
CAUTION
USE COPPER CONDUCTORS ONLY.
UNIT TERMINALS ARE NOT DESIGNED TO
ACCEPT OTHER TYPES OF CONDUCTORS.
FAILURE TO DO SO MAY DAMAGE THE
EQUIPMENT.
Figure 47: DX Cooling w/Electric Heat, Valve Control 460-Volt/3 Phase
MicroTech II Wiring Diagram – Typical
CAUTION
Refer to unit wiring diagram located on inside of right front panel, for
actual wiring. Improper wiring can cause equipment and property
damage.
Typical Wiring Diagram
Page 27 of 42
Electrical Data
Table 11: Model ARQ, ERQ, GRQ Electrical Data – Size 024
Voltage Range Room
Compressor
Heating Options
Power Supply
Voltage
Fan
Heater HeaterMaximum
Auxiliary Heat Type
Min.Max.FLA RLALRA
kW
Amps MCAFuse
Refrigerant Heating
208/60/1
197
228
2.7
11.4
52.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Refrigerant Heating
230/60/1 207253 2.7 11.4 52.0 1
Low (3-elem.)
Electric Heat
High (6-elem.)
Refrigerant Heating
208/60/3 197
228
2.7
7.9
59.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Refrigerant Heating
230/60/3 207253 2.7 7.9 59.0 1
Low (3-elem.)
Electric Heat
High (6-elem.)
Refrigerant Heating
460/60/3
414506 2.7 3.9 29.7 1
Low (3-elem.)
Electric Heat
High (6-elem.)
Notes:
1
Electric Heat Options are with Compressor
FLA = Full Load Amps
RLA = Rated Load Amps
LRA = Locked Rotor Amps
–
–
1 7.0
25
8.0
16.0
–
7.7
15.3
–
8.0
16.0
–
7.7
15.3
–
7.7
38.5
76.9
–
33.3
66.7
–
22.2
44.4
–
19.2
38.5
–
9.6
65.0
113.1
17.0
58.6
100.3
12.6
40.3
68.1
12.6
36.6
60.7
7.6
19.6
70
125
25
60
110
20
45
80
20
40
70
15
20
15.319.231.6 35
MCA = Minimum Circuit Ampacity
Table 12: Model ARQ, ERQ, GRQ Electrical Data – Size 040
Voltage Range Room
Compressor
Heating Options
Power Supply
Voltage
Fan
Heater HeaterMaximum
Auxiliary Heat Type
Min.Max.FLA RLALRA
kW
Amps MCAFuse
Refrigerant Heating
208/60/1
197
228
2.7
18.6
96.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Refrigerant Heating
230/60/1 207
253
2.7
18.6
96.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Refrigerant Heating
208/60/3 197
228
2.7
15.0
88.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Refrigerant Heating
230/60/3 207
253
2.7
15.0
88.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Refrigerant Heating
460/60/3
414
506
2.7
6.8
44.0
Low (3-elem.)
1
Electric Heat
High (6-elem.)
Notes:
1
Electric Heat Options are with Compressor
FLA = Full Load Amps
RLA = Rated Load Amps
LRA = Locked Rotor Amps
Page 28 of 42
–
–
26.0
40
10.0
20.0
–
9.6
19.2
–
10.0
20.0
–
9.6
19.2
–
9.6
48.1
96.2
–
41.7
83.3
–
27.8
55.5
–
24.1
48.1
–
12.0
86.0
146.1
26.0
78.0
130.1
21.5
56.1
90.8
21.5
51.5
81.6
11.2
26.2
90
150
40
80
150
35
60
100
35
60
90
15
30
19.224.141.3 45
MCA = Minimum Circuit Ampacity
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Electrical Data
Table 13: Model ARQ, ERQ, GRQ Electrical Data – Size 048
Voltage Range Room
Compressor
Heating Options
Power Supply
Voltage
Fan
Heater HeaterMaximum
Auxiliary Heat Type
Min.Max.FLA RLALRA
kW
Amps MCAFuse
Refrigerant Heating
–
–
32.2
50
208/60/1
197
228
2.7
23.6
96.0
Low (3-elem.)
12.0
57.7
104.3
1
Electric Heat
High (6-elem.)
24.0
115.4
176.4
Refrigerant Heating
–
–
32.2
230/60/1 207253 2.7 23.6 96.0 1
Low (3-elem.)
11.6
50.0
94.7
Electric Heat
High (6-elem.)
23.0
100.0
157.2
Refrigerant Heating
–
–
21.5
208/60/3 197
228
2.7
15.0
88.0
Low
(3-elem.)
12.033.363.1
1
Electric Heat
High (6-elem.)
24.0
66.6
104.7
Refrigerant Heating
–
–
21.5
230/60/3 207
253
2.7
15.0
88.0
Low
(3-elem.)
11.5
28.9
57.5
1
Electric Heat
High (6-elem.)
23.0
57.7
93.6
Refrigerant Heating
–
–
11.6
460/60/3
414506 2.7 7.1 41.0 1
Low (3-elem.)
11.5
14.4
29.6
Electric Heat
High (6-elem.)
23.0
28.9
47.7
Notes:
1
Electric Heat Options are with Compressor
FLA = Full Load Amps
RLA = Rated Load Amps
LRA = Locked Rotor Amps
IM 1083
110
200
50
100
175
35
70
110
35
70
100
15
30
50
MCA = Minimum Circuit Ampacity
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 29 of 42
MicroTech II™ Unit Electrical
Connections
DANGER
To avoid electrical shock, personal injury or death, be sure that field
wiring complies with local and national fire, safety, and electrical
codes, and voltage to the system is within the limits shown in the
job-specific drawings and unit electrical data plate(s).
WARNING
Power supply to unit must be disconnected before making field
connections. To avoid electrical shock, personal injury or death,
be sure to rigorously adhere to field wiring procedures regarding
proper lockout and tagout of components.
See Table 11, 12 & 13, and Figure 47 and the job-specific electrical
drawings before proceeding with field power and control wiring. See
also the wiring diagram provided on the unit ventilator right front
access panel.
Unit ventilators equipped with an optional electric heating coil have
electric heating coil power connections at right end only.
2.
Confirm that power is de-energized and locked and tagged-out.
3. Plug in the unit control wiring male plug(s) into the appropriate
female plug(s). Refer to Figures 49, 51, 52 & 53.
• Plug in 4-pin (for MicroTech II and Electromechanical, see
Figure 51).
• 10-pin (MicroTech II only, see Figure 52).
• 12-pin (MicroTech II only, see Figure 53).
4. Insert the main power wires into the main power On/Off switch
terminal lugs (A, B and C). Note that terminal lug B, not used
on single phase. Connect the Ground wire to the ground lug as
shown in Figure 50. Tighten the terminal lugs securely.
5.
Reinstall the cover plate on the main power wire trough.
Note: For Electromechanical wiring (see page 36).
Control connections for elecromechanical are made to the
terminal block in the left end compartment.
Figure 49: Control Wiring Plug Connections in Right End
Compartment.
Procedure
1. Provide power supply to right end compartment to match unit
nameplate.
CAUTION
Use copper conductors only. Use of aluminum conductors may
result in equipment failure and overheating hazards. All wiring
in right hand compartment must be class 1.
Figure 48: Electrical Power On/Off Switch Located
Behind Front-Middle Access Panel in Wire Trough, with
Power Entry accessed Behind Right-Front Access Panel
Control wiring whips with
caps located in the right
front end compartment
Figure 50: Electrical Power On/Off Switch for Power
Wiring Connections
Terminal lugs for main power wiring from unit,
field connection by others
A
B
Unit Main Power
On/Off Switch
C
Grommeted Power Wire Entry
Main Power On/Off Switch
Ground Lug
Note: B not used on single phase.
Page 30 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Figure 51: 4-pin Plug MicroTech II Control Wiring Diagram
(4-pin)
Male Connector
Unit Ventilator
Communication
Module
Optional Building Automation System (BAS)
(4-pin)
Female Connector
BACnet ®
Metasys ®
LONWORKS ®
Red
1
RT+
FTT–10 (B)
N2+
Black
2
RT-
FTT–10 (A)
N2–
GND
3
GND
GND
Note:
The N2 Bus can use either solid or stranded wires of the following types:
3-wire twisted cable, 2 twisted-pair telephone cable, or two twisted pair
with shield. The wiring is polarity sensitive.
The polarity of the signal must always be maintained throughout the
network. Always connect + to + and - to -. The shield connection must
be continuous throughout the entire network and must be connected to
earth ground at one (and only one) point.
(By others)
(By others)
(By others)
Use Belden 8471, NEMA Level 4, or Echelon-approved equivalent wire.
Since the LONWORKS communication wiring is polarity insensitive, no polarity
must be observed when making connections via the unshielded twisted-pair wiring.
Wiring: Use twisted shielded pair (Connect Air W221P-2544 or equivalent).
Daisy-chain and tie shield to earth ground at one point only.
The polarity of the signal must always be maintained throughout the network.
Always connect + to + and - to -. The shield connection must be continuous
throughout the entire network and must be connected to earth ground
at one (and only one) point.
Figure 52: 10-pin Plug MicroTech II™ Wiring Diagram
P6 (10-pin)
Connector
Unit Ventilator
601
602
603
604
605
606
608
610
xBO-2
Comm
xBO-1
BO-6
BO-6
Comm
24vac Supply
24vac Comm
P6 (10-pin)
Connector
601A
602A
603A
604A
605A
606A
608A
610A
Wire
Caps
Shield
Note: Not all external input options are available for all models.
External Output
Option 1 Device
(by others)
External Output
Option 2 Device
(by others)
External Output
Option 3 Device
(by others)
Lights On/Offf
Signal or
Motorized Water
Valve Open/Close
Fault Indication
or
Pump Restart
Signal
Auxiliary Heat
Signal
or
Exhaust Fan
On/Off Signal
Figure 53: 12-pin Plug MicroTech II™ Control Wiring Diagram
P1 (12-pin)
Connector
Unit Ventilator
P1 (12-pin)
Connector
GND
AI-2
Comm
AI-1
LED
896
GRN
BLK
WHT
RED
896
GRN
BLK
WHT
RED
GND
Comm
BI-6
BI-5
BI-4
896
908
907
906
905
896
908A
907A
906A
905A
Wire
Caps
Remote Wall Sensor
(Option)
Shield
Setpnt Adjst.
Comm
Sensor
LED
Shield
Note: Not all external input options are available for all models.
IM 1083
1
5
6
4
3
2
External Input
Option 3 Device
(by others)
External Input
Option 2 Device
(by others)
Ventilation Lockout
(default) or
Exhaust Interlock
Remote
Shutdown
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ External Input
Option 1 Device
(by others)
Unoccupied (default)
or Dewpoint Humidity
Page 31 of 42
MicroTech II™ Remote Wall Mounted Sensor
Figure 55: Correct Wall Sensor Locations
= Correct Sensor Location
WARNING
Window Exposure
Rigorously adhere to field wiring procedures regarding proper
lockout and tagout of components.
Window Exposure
Unit
WARNING
Interior Wall
To avoid electrical shock, personal injury or death:
1. Installer must be qualified, experienced technician.
2.Disconnect power supply before installation to prevent
electrical shock and damage to equipment.
3. Make all connections in accordance with electrical wiring
diagrams, and in compliance with national and local codes.
Use copper conductors only.
4. Do not exceed ratings of the device. This is a low voltage
device: Never apply more than 12VAC/VDC to any lead or
damage will result.
5. Avoid locations where excessive moisture, corrosive fumes,
or vibrations are present.
Interior Wall
Window Exposure
Interior Wall
Window Exposure
Unit
Figure 54: Basic Remote Wall Sensor
Interior Wall
Figure 56: Incorrect Unit and Wall Sensor Locations
= Incorrect Sensor Location
Window Exposure
LED
Unit
Shelving
File Cabinet
Tenant Override Button
Interior Wall
Cubicle Wall
Sensor
When Using A Remote Wall Mounted
Temperature Sensor
NOTICE
All MicroTech II equipped unit ventilators are provided as standard
with a unit mounted space temperature sensor. The unit mounted
temperature sensor is provided with a quick disconnect plug (white)
located outside of box with numbered wires 101 and 102. When
using a remote wall mounted temperature sensor the unit mounted
temperature sensor quick disconnect plug must be separated so
that the unit mounted sensor is disconnected from the UVC.
Interior Wall
Shelving
Interior Wall
Window Exposure
Window Exposure
Note:
Avoid placing wall sensor near drafty areas such as doors or windows.
Avoid external walls, or dead spots near exposed columns. Avoid
direct sunlight on wall sensor.
Table 14: Max Sensor Wire Length and Gauge
Maximum sensor wire length for less than 1°F error GaugeLength
14 AWG 800 ft. (244 m)
16 AWG 500 ft. (152 m)
Page 32 of 42
Unit
If a decision is made to use a Remote Wall Mounted Temperature
Sensor instead of the unit mounted room air sensor then placement of
the Remote Wall Mounted Temperature Sensor is critical for proper
room temperature sensing (see figures 55 and 56). The UVC is capable
of using one of two remote wall mounted temperature sensors. Figure
59 shows a 4-wire connection (plus shield drain wire) (see table 14).
It is recommended that additional wires be pulled to compensate for
potential wire breakage or future options. The Basic Wall Mounted
Temperature Sensor requires only 3-wires (plus shield drain wire) since
the Basic Wall Mounted Temperature Sensor has no setpoint adjustment
(see figure 59).
Interior Wall
18 AWG
20 AWG
22 AWG
310 ft. (94 m)
200 ft. (61 m)
125 ft. (38 m)
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
CAUTION
Figure 59: Wall-Mounted Temperature Sensor Wiring for
Basic Wall Sensor
Static sensitive components. A static discharge while handling
electronic circuit boards can cause damage to the components.
Discharge any static electrical charge by touching the bare metal
inside the main control panel before performing any service work.
Never unplug any cables, circuit board terminal blocks, relay
modules, or power plugs while power is applied to the panel.
P1
Connector
GND
AI-2
Comm
AI-1
LED
Field Wiring Remote Mounted Temperature
Sensor
The low voltage field wiring connections have all been centrally located
within the unit ventilator and are easily accessible.
To simplify field connections, multi-pin plugs are factory provided and
pre-wired with short wire whips (see figure 57). Each of the wires in
these wire whips is capped and should remain capped if not used. The
unit mounted temperature sensor is provided with a quick disconnect
plug (white) with wires numbered 101 and 102, and must be separated
so that the unit mounted sensor is disconnected from the UVC. This
disables the unit mounted sensor (see figure 58). See Figures 59 and 60
for wiring the remote mounted temperature sensor to the unit control
wiring.
Wall Sensor
(option)
Unit Ventilator
896
GRN
BLK
WHT
RED
Wire
Caps
1
5
6
4
3
2
Shield
Setpt. Adj.
Comm
Sensor
LED
Factory Wiring
Field Wiring (by Others)
External Device (by Others)
Figure 60: Wall Mounted Temperature Sensor Wiring for
Expanded Wall Sensor
BLK
Figure 57: Wire whips with Caps for Field Wiring Remote
Mounted Temperature Sensor
Installing the Remote Mounted Temperature Sensor
NOTICE
The unit comes with a unit mounted sensor and does not require
a remote wall mounted sensor.
Wire Wips for Field Wiring with Caps (see the wiring diagram
provided on the unit ventilator right front access panel)
This describes the installation of the following three wall mounted
sensor models:
• P/N 111048101 – Basic
• P/N 111048103 – Expanded ± 3oF setting
Use the installation instructions included with the Remote wall
sensor.
Parts Included - All Models
NOTICE
All low voltage field wiring connections must be run in shielded
cable with the shield drain wires connected as shown in the
field wiring diagrams.
Figure 58: Quick Disconnect Plug, Wires 101 & 102 for
Unit Mounted Temperature Sensor
Two pin plug for unit-mounted sensor
•
•
•
•
•
•
pre-assembled sensor that includes:
- large (50.8 x 101.6 mm [2 x 4 in.]) mounting base (1)
- terminal block (1)
- 1.5 mm (1/16 in.) cover screw (1)
- end caps (2)
alternate small (80 x 80 mm [3.15 x 3.15 in.]) mounting
base (1) with attached terminal block (1)
cover slider insert with printed logo for Daikin (1)
No. 6-32 x 1 in. flat-head screw (2)
No. 8 x 1.25 in. panhead tapping screw (2)
hollow plastic wall anchor (2)
Parts Included - 111048103 Only
• alternate serrated setpoint dial (attached)
• smooth setpoint dial (separate)
Special Tools Needed
•
•
•
•
IM 1083
.5 mm (1/16 in.) Allen wrench
7 mm (1/4 in.) flat-blade screwdriver
hole saw with 35 mm (1-3/8 in.) blade (for surface mounting only)
drill with 8 mm (5/16 in.) drill bit (for surface mounting only)
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 33 of 42
Mounting
Figure 62: Surface Mounting Using Large Base
The MicroTech II™ Wall Mount Sensor allows for two mounting
methods: wallbox mounting and surface mounting.
Note: Wallbox mounting requires the large mounting base.
Use either the large or small mounting base for surface mounting.
Performing Wallbox Mounting
To perform wallbox mounting (Figure 61):
1. Slide the desired cover slider insert onto the cover until it
snaps into place.
2. Remove the two endcaps from the mounting base.
3. Loosen the cover screw using a 1.5 mm (1/16 in.) Allen
wrench and remove the sensor.
4. Pull the cable or wiring through the wallbox and mounting base.
5. Rotate the mounting base until one of the arrows on the
base points up and the screw openings in the base align
with the threaded holes in the wallbox. If necessary, reposition the
cover screw above the arrow.
6. Fasten the base to the wallbox with the No. 6-32 x 1 in.
screws provided.
7. Remove terminal block and wire to the appropriate terminals as
shown in ”Wiring”.
IMPORTANT
8. Install terminal block onto sensor with terminal 6 next to the edge of sensor.
9. Replace the sensor and tighten the cover screw.
10.Replace the two endcaps on the mounting base.
Figure 61: Wallbox Mounting
IMPORTANT
11. Install terminal block onto sensor with terminal 6 next to the edge of sensor.
12.Replace the sensor and tighten the cover screw.
13.Replace the two endcaps on the mounting base.
Figure 63: Insert Wall Anchors
Performing Surface Mounting Using Large
Base
To perform surface mounting using the large base. (Figure 62):
1. Slide the desired cover slider insert onto the sensor until it snaps
into place.
2. Remove the two endcaps from the mounting base.
3. Loosen the cover screw using a 1.5 mm (1/16 in.) Allen
wrench and remove the sensor.
4. Drill a 35 mm (1-3/8 in.) hole in the surface where the sensor will
be mounted.
5. Pull the cable or wiring through the hole.
Page 34 of 42
6. Rotate the mounting base until one of the arrows on the
base points up. If necessary, reposition the cover screw
above the arrow. Place the base against the wall, and mark the screw
holes using the base as a template.
7. Drill two 8 mm (5/16 in.) holes at the markings.
8. Insert the hollow plastic wall anchors (Figure 62), position
the base, and then drive the two pan-head tapping screws.
9. Pull the wiring through the mounting base.
10. Remove terminal block and wire to the appropriate terminals as
shown in “Wiring”.
Performing Surface Mounting Using Small
Base
To perform surface mounting using the small base (Figure 64):
1. Slide the desired cover slider insert onto the sensor until it snaps
into place.
2. Remove the two endcaps from the mounting base.
3. Remove the cover screw using a 1.5 mm (1/16 in.) Allen
wrench and discard it. Remove the sensor.
4. Remove and discard the terminal block from inside the sensor.
5. Drill a 35 mm (1-3/8 in.) hole in the surface where the sensor will
be mounted.
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
6. Pull the cable or wiring through the hole.
7. Place the small base against the wall, (with the arrow on
the base pointing up) and mark the screw holes using the
base as a template.
8. Drill two 8 mm (5/16 in.) holes at the markings.
9. Insert the hollow plastic wall anchors (Figure 64), position
the base, and then drive the two pan-head tapping screws.
10. Pull the wiring through the mounting base.
11. Wire to the appropriate terminals to the small mounting
base as shown in “Wiring”.
12. Snap the sensor into the small mounting base (cover screw is not
required).
Figure 66: 111048103 Sensor Wiring
Figure 64: Surface Mounting Using Small Base
Setup and Adjustments – Switching Setpoint
Dials
To switch setpoint dials:
1. Remove the sensor from the mounting base.
2. Rotate the smooth setpoint dial so that it points straight up.
3. As shown in Figure 67, insert the Allen wrench through the hole
in the back of the printed wiring board (A) and push gently until
the smooth setpoint dial is free.
4. Press the serrated setpoint dial into place on the sensor,
making sure that the dial points straight up.
5. Replace the sensor on the mounting base.
Figure 67: Removing the Standard Setpoint Dial
Wiring
Setpoint Dial
NOTICE
Shielded cable should always be used. However, shielded cable
generally is not required, except in electrically noisy environments,
such as near gas ignition systems, radar or magnetic resonance
imaging equipment, etc. It is the responsibility of others to
determine what constitutes an “electrically noisy” environment
for each installation. Refer to table 14, page 32 for maximum
wire length.
A
Figure 65: 111048101 Sensor Wiring
Terminal Block on 111048101 Sensor
Repairs and Replacement
No repair options available. Call your local Daikin
representative for sensor replacement.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 35 of 42
ElectroMechanical Unit Wiring
Connections
CAUTION
Refer to unit wiring diagram located on inside of right front panel,
for actual wiring. Improper wiring can cause equipment and property
damage.
Electromechanical control connections are made to the terminals located
behind the left-front access panel as shown in Figure 68. Refer to the
wiring diagram (Figure 69) for wiring details and the wiring diagram
provided with the unit.
DANGER
Figure 68: Thermostat Control Terminal Connections
Located in Left Front Compartment
Disconnect all electrical power before servicing unit to
prevent injury or death due to electrical shock.
CAUTION
Terminal Connections for
Electromechanical Controls
Use copper conductors only. Unit terminals are not designed to accept
other types of conductors. Failure to do so may damage the equipment.
Legend
Plug In
Comp Tie Point
Splice
Optional Wiring
Tap Conn.
Wired by Others
Term Conn.Factory Wired
Capped Wire
Ground
Figure 69: Typical ElectroMechanical Wiring Diagram Model AR, Thermostat Control with Normally Open Heat,
460 Volt - 3Phase
Page 36 of 42
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Installing (Optional) End Panel
End Panel Dimensions
Figure 70: 1" (25mm) and 6" (152mm) End Panel Dimensions – ARQ, ERQ & GRQ Self-Contained Floor Unit Ventilators
All Dimensions
in Inches
Top View
16⅝" (422mm) Deep
End Panels
16 5/ 8"
16 5/ 8"
(422mm)
(422mm)
End View
With No
Cut-out
16 5/ 8"
16 5/ 8" 1"
1"
(422mm)
1"
1"
(422mm)
(25mm)
(25mm)
(25mm) (25mm)
19 5/ 8"
19 5/ 8"
(498mm)
(498mm)
19 5/ 8"
19 5/ 8" 1"
1"
(498mm)
1"
1"
(498mm)
(25mm)
(25mm)
(25mm) (25mm)
21⅞" (556mm) Deep
End Panels
21 7/ 8"
21 7/ 8"
(556mm)
(556mm)
27 7/ 8"
27 7/ 8"
27 7/ 8" (708mm)
27 7/ 8"
(708mm)
(708mm) (708mm)
27 7/ 8"
27 7/ 8"
27 7/ 8" (708mm)
27 7/ 8"
(708mm)
(708mm) (708mm)
21 7/ 8"
21 7/ 8"
1"
1"
(556mm)
1"
1"
(556mm)(25mm)
(25mm)
(25mm) (25mm)
28"
2
28"
(711mm)
(712
(711mm) (71
27 7/ 8"
27 7/ 8"
27 7/ 8" (708mm)
27 7/ 8"
(708mm)
(708mm) (708mm)
Dashed lines indicate kickplate
End View
with 2½"x 7"
(64mm x 178mm)
Cut-out
End View
with 4" x 18"
(102mm x 457mm)
Cut-out
End View
with 4" x 22"
(102mm x 559mm)
Cut-out
7"
7"
1"
1"
7"
7"
1"
1"
(178mm)
(178mm)
(25mm)
(25mm)
(178mm) (178mm)
(25mm) (25mm)
7"
7"
1"
1"
7"
7"
1"
1"
(178mm)
(178mm)
(25mm)
(25mm)
(178mm) (178mm)
(25mm) (25mm)
2 1/ 2"
2 1/ 2"
2 1/ 2"
2 1/ 2" 7
(64mm)
(64mm)
27 / 8"
(64mm) (64mm)
27 7/ 8"
(708mm)
(708mm)
2 1/ 2"(64mm)
2 1/ 2"(64mm)
2 1/ 2"(64mm)
2 1/ 2"(64mm) 7
27 / 8"
27 7/ 8"
27 7/ 8"
27 7/ 8"
(708mm)
(708mm)
(708mm)
(708mm)
7"
7"
1"
1"
7"
7"
1"
1"
(178mm)
(178mm)
(25mm)
(25mm)
(178mm) (178mm)
(25mm) (25mm)
2 1/ 2"(64mm)
2 1/ 2"(64mm)
2 1/ 2"(64mm)
2 1/ 2"(64mm) 7
27 7/ 8"
27 / 8"
27 7/ 8"
27 7/ 8"
(708mm)
(708mm)
(708mm)
(708mm)
1"
1"
1"
1"
1"
1"
1"
1"
(25mm)
(25mm)
(25mm)
(25mm)
18"
18"
18"
18"
(25mm) (25mm)
(25mm) (25mm)
18"
18"
18"
18" 27 7/ 8"
(457mm)
(457mm)
(457mm)
(457mm)
27 7/ 8"
27 7/ 8"
27 7/ 8"
7/ 8"
7/ 8"
(457mm)
(457mm)
(457mm) (457mm)
27 7/ 8" (708mm)
27 7/ 8"
27
27
(708mm)
(708mm) (708mm)
(708mm) (708mm)
(708mm) (708mm)
1"
1"
1"
1"
(25mm)
(25mm)
18"
18"
(25mm)
(25mm)
18"
18"
(457mm)
(457mm)
7
27 7/ 8"
(457mm) (457mm) 27 7/ 8"
27 / 8" (708mm)
27 7/ 8"
(708mm)
(708mm) (708mm)
4"
4"
4"
4"
(102mm)
(102mm)
(102mm) (102mm)
4"
4"
4"
4"
(102mm)
(102mm)
(102mm) (102mm)
4"
4"
4"
4"
(102mm)
(102mm)
(102mm) (102mm)
1"
1"
1"
1"
1"
1"
1"
1"
(25mm)
(25mm)
(25mm)
(25mm)
(25mm)
(25mm)
(25mm) (25mm)
22"
22"
22"
22"
27 7/ 8"
27 7/ 8"
22"
22" 27 7/ 8"
22"
22" 27 77/ 8"
(559mm)
(559mm)
(559mm)
(559mm)
7/ 8"
27 7/ 8" (708mm)
27 7/ 8"
27
27
/
8
"
(708mm)
(708mm) (708mm) (559mm) (559mm)
(559mm) (559mm)
(708mm) (708mm)
(708mm) (708mm)
4"
4"
4"
4"
(102mm)
(102mm)
(102mm) (102mm)
4"
4"
4"
4"
(102mm)
(102mm)
(102mm) (102mm)
27 7/ 8"
27 7/ 8"
(708mm)
(708mm)
1"
1"
1"
1"
(25mm)
(25mm)
(25mm)
(25mm)
22"
22"
22"
22" 27 7/ 8"
(559mm)
(559mm)
27 7/ 8"
(559mm) (559mm)
27 7/ 8" (708mm)
27 7/ 8"
(708mm)
(708mm) (708mm)
22"
22"
(559mm
(559mm
4"(102mm)4"(102mm)
4"(102mm)4"(102mm)
4"(102mm)4"
4"(102mm)4"
6" (152mm) End Panel Dimensions – Self-Contained Floor Unit Ventilator
Top View
End View
With No
Cut-out
IM 1083
16 5/ 8"
16 5/ 8"
(422mm)
(422mm)
16 5/ 8"
16 5/ 8"
(422mm)
(422mm)
6"
6"
6"
6"
(152mm)
(152mm)
(152mm) (152mm)
19 5/ 8"
19 5/ 8"
(498mm)
(498mm)
19 5/ 8"
19 5/ 8"
(498mm)
(498mm)
6"
6"
6"
6"
(152mm)
(152mm)
(152mm) (152mm)
21 7/ 8"
21 7/ 8"
(556mm)
(556mm)
21 7/ 8"
21 7/ 8"
(556mm)
(556mm)
6"
6"
6"
6"
(152mm)
(152mm)
(152mm) (152mm)
27"
27"
27"
27"
(686mm)
(686mm)
(686mm) (686mm)
27"
27"
27"
27"
(686mm)
(686mm)
(686mm) (686mm)
27"
27"
27"
27"
(686mm)
(686mm)
(686mm) (686mm)
3" (76mm)3" (76mm)
3" (76mm)3" (76mm)
3" (76mm)3" (76mm)
3" (76mm)3" (76mm)
3" (76mm)3" (76mm)
3" (76mm)3" (76mm)
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ 28"
2
28"
(711mm)
(712
(711mm) (71
Page 37 of 42
Installing (Optional) End Panel
Figure 71: Piping Stub-Up Details, 6" End Panel
Piping Stub-up Within Cabinet
Piping Stub-up Within 6" End Panel
End Panel 6"
Application and Dimension
Unit End Compartment
Unit End Compartment
6
1
Wall Line 11½
1
Note: Space available in left end
compartment for piping stub-up.
Stub-up, including unions and shutoff
valves, must disconnect below floor
line for unit installation and removal.
Wall Line
10¾
4
Left End
of unit
(Less end panel)
Space available at left end of unit
for piping stub-up when 6" end
panel is used.
End Panel Assembly
Accessory end panels are shipped separately with hardware and
kickplate.
The final step of unit installation is attaching the end panels. End panels
are required unless the unit has adjoining matching cabinets.
1. Refer to Figure 72 for a 1" thick end panel. Attach two (2) Tinnerman
nuts to the top edge of the end panel and two (2) to the bottom
end of the unit. Align the end panel with the front and top edges
of the unit. Insert through upper mounting holes inside unit end
compartment and thread into tinnerman clips on the end panel.
Attach the end panel to the unit using four (4) 5/32" hex socket
head fasteners provided.
Figure 72: 1" End Panel
21⅞" Unit
Projection
Left End of unit
(Less end panel)
All dimensions in inches
2. Refer to Figure 73 for 6" thick end panel.
a. Position bracket (YC1934) on wall so angle is 5" from
end of unit and near bottom.
b. Mark and drill required hole for device to fasten bracket
to wall (not included).
c. Attach the bracket to wall.
d. Attach two (2) Tinnerman nuts to the top edge of the end panel
and one (1) to the bottom front of the end frame.
e. Align the end panel with the front and top edges of the unit.
Attach end panel to the unit using three (3) 5/32 " hex socket
head fasteners provided. Bracket should prevent movement of
panel toward the unit when pressure is applied to the end panel.
Figure 73: 6" End Panel with Provided Hardware
5¼" Adapter Back Painted Top (Option)
21⅞" Unit
Projection
1/4"- 20 × 1/2" Screw
1/4"- 20 × 1/2" Screw & 1/4" Flat Washer
Tinnerman Nut,
Clip on End Panel
Tinnerman Nut,
Clip on End Panel
End of Unit
Angle Bracket
Welded for
Rigidity
1"
End
Panel
1/4"- 20 Tinnerman
Nut, Clip over Lower
Hole in Unit Corner
Bracket
1/4"- 20 Tinnerman Nut, Clip
over Lower Hole in Unit Base
Steel Kickplate
Page 38 of 42
1/4"- 20 × 1/2"
Screw
5"
Bracket
YC1934
6" End Panel
Oxford Brown Kickplate, Factory Assembled
to Base of End Panel
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
Prepare Unit Ventilator for Start-up
Post Installation Checklist
□
Unit securely fastened to wall
□
Electrical hook-up complete; power, control, wall
thermostat (if applicable) in accordance with unit wiring
diagram(s)
□
Air filter clean and in place
□
All access and end panels in place and protective
covering removed
□
No debris, dust, dirt, or obstructions exist in front of
the return air intake grille at the floor
□
All installation work has been completed in
accordance with applicable local, state and national
codes
□
□
□
CAUTION
When oiling the middle fan shaft bearing DO NOT allow oil to
drip down on the components located below the bearing.
Figure 74: Fan Shaft Bearing(s) Oil Cup Location(s)
Room Air Fan
Shaft Bearing
Unit Size 048 Bearing, Located
Between First and Second
Fan from Left End of Unit
Room air fan shaft bearing oiled
Left Front Access Panel
Unit square and level and running smoothly and
quietly
No air infiltration
□
Paint nicks and scratches touched up (as required)
□
Access space provided for maintenance, service and
unit removal
□
□
Shipping carton replaced over unit for protection
□
Owner or maintenance personnel instructed on
proper operation and maintenance
Owner or maintenance personnel provided with a
copy of this manual and other manuals/documents
shipped with the unit.
Oiling
Do not attempt to operate the unit fans until the room air fan shaft
bearing has been oiled.
Access to fan shaft bearing is through left top access door. Use a high
grade SAE 20 or 30 nondetergent mineral oil. A few drops are sufficient.
Do not over oil. Refer to Figure 74 for the oil point.
Note:
Unit size 048 has a fan shaft bearing located between the first
and second fan from the unit left end that is required to be oiled.
IM 1083
WARNING
Turn off unit before servicing to avoid danger of injury from
rotating fans.
NOTICE
Motor manufacturer recommends not oiling the room fan motor.
Filter(s)
AAF®-HermanNelson® single-use filters are standard on all units.
Permanent wire mesh and renewable media filters are available in lieu
of single-use filters.
• Single-use filters feature Amerglas media. They are designed to be
used once and discarded.
• Permanent filters are metal filters that may be removed for cleaning
and reused numerous times.
• Renewable media filters (figure 75) consist of a heavy painted metal
structural frame and renewable Amerglas media.
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 39 of 42
Prepare for Start-up
Turn off the unit (fan speed switch or unit on/off switch is located
behind the right front end compartment panel). Remove the center
front panel, pull out the filter and replace with a clean filter. Replace
the center panel and restart the unit.
Filters should be replaced during the first week of placing into service
to prevent dirt carry-over into the internals of the unit and back into the
classroom (see figure 75). A periodic filter changeout program should
be established. Filters should be checked monthly or more often if
conditions indicate. Filters are included in all units.
CAUTION
Units must have a filter installed when operating. Operation
without a filter can compromise unit performance due to build
up of dust and dirt on components.
CAUTION
Dirty or clogged filters can impact unit performance, and damage
the unit.
Figure 75: Filter Installation
Renewable Media
(Single-use and
Permanent Wire
Mesh Filters Also
Available.)
Motor
CAUTION
Filter
Electric heat units should ONLY use permanent wire mesh filters.
Filters other than wire mesh are not intended for electric heat units,
and can cause unit damage, property damage or personal injury.
Complete Check, Test and Start Procedure
Provide completed Check, Test and Start form to your local AAF®HermanNelson® representative and specifying engineer for verification
that proper start-up was completed.
The form is enclosed in the manila envelope located behind the left
front access door.
CAUTION
Remove debris, dust, dirt, and any obstruction from the area
in front of the return air intake grille at the floor.
1. Before proceeding, inspect the fan system, to verify that all parts are
aligned properly and move freely. Inspect fans and fan discharge area
for obstructions. Verify that power has been disconnected. Rotate
the fan assembly manually. Check that a clean filter is installed and
the area in front of unit ventilator is free of debris. All panels should
be in place and properly fastened. Check for outdoor air leaks and
condensation. Verify that the coil section is properly sealed using
the insulating foam donuts supplied.
2. After the unit ventilator has been properly installed, activate unit
electrical power and applicable refrigerant systems.
3. Using the applicable control, activate the unit ventilator. Depending
on the operating mode selected, the dampers, fans, and other
components should operate as needed.
4. Run the unit ventilator for ten minutes, listening and observing. Fans
should be operating correctly and rotating in the proper direction,
without unusual noise. Likewise, the unit should be free of sheet
metal rattles and / or unusual noises. All panels should be in place
and properly fastened. Check for air leaks and condensation.
Compressor should run without noise. If noisy, check electrical
phases to verify that the compressor is rotating correctly. Phase
reversal can damage the compressor and void the warranty.
Page 40 of 42
Installer/Owner’s Responsibility
Protect your investment - read carefully
Your Daikin express written limited warranty does not cover equipment
failures that are caused by misuse, abuse, mis-installation, failure to
maintain the unit, etc. Here are a few examples of the types of damage
not covered by warranty:
1. Damage resulting from handling during transportation or
installation.
2. Damage to compressor resulting from improper electrical phase
hook up.
3. Progressive damage to unit from failure to check and test at startup.
4. Damage to electronic or electrical components from incorrect
or fluctuating power supply, stray static electricity, or building
automation network inputs.
5. Inaccessibility of unit for service or parts installation that prevents
proper equipment operation.
6. Damage to aluminum coils and electronic controls, etc., resulting
from operating the unit while building maintenance cleaning agents
are in use.
7. Damage resulting from freezing water or condensate, inadequate
or interrupted water supply, use of corrosive water, rearrangement
of unit piping system, fouling or restriction of the water circuit by
foreign material.
8. Damage caused by not cleaning or replacing filters.
9. Damage resulting from failure to keep evaporator coil and intake
clean.
10. Damage caused by accident, alteration of the unit design or
tampering.
Please complete and return the Check, Test and Start document
immediately to protect your warranty.
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
IM 1083
General Maintenance
Troubleshooting
The in and outs of R-410A
R-410A is a non-ozone depleting blend of two refrigerants - HFC-125
and HFC-32 in a fifty percent mixture. R-410A exhibits higher operating
pressure and refrigeration capacity than R-22. R-410A is intended for
use in new air conditioning applications that have traditionally been
used HCFC-22 (R-22). Due to higher capacity and pressure of R-410A,
it must not be used in existing R-22 systems.
Although R-410A is non-flammable at ambient temperature and
atmospheric pressure, it can become combustible under pressure when
mixed with air.
Note: R-410A should not be mixed with air under
pressure for leak testing. Pressure mixtures of dry
nitrogen and R-410A can be used for leak testing.
Lubrication
R-410A should be used only with polyester (POE) oil. The HFC
refrigerant components in R-410A will not be compatible with mineral
oil or alkylbenzene lubricants. R-410A systems will be charged with
the OEM recommended lubricant, ready for use with R-410A.
Charging
Due to the zeotropic nature of R-­410A, it should be charged as a
liquid. In situations where vapor is normally charged into a system,
a valve should be installed in the charging line to flash the liquid to
vapor while charging.
1. Normal maintenance on all units is generally limited to filter
changes. Units are provided with permanently lubricated motors
and require no oiling even though oil caps may be provided.
2. Filter changes are required at regular intervals. The time period
between changes will depend upon the project requirements.
Check filters at 60-day intervals for the first year until experience
is acquired. If light cannot be seen through the filter when held up
to sunlight or a bright light, it should be changed. A more critical
standard may be desirable.
3. The condensate drain pan should be checked annually and cleaned
and flushed as required.
4. Record performance measurements of volts, amps, and water
temperature differences (both heating and cooling). A comparison
of logged data with start-up and other annual data is useful as an
indicator of general equipment condition.
5. Periodic lockouts almost always are caused by air or water
problems. The lockout (shutdown) of the unit is a normal
protective result. Check for dirt in the water system, water flow
rates, water temperatures, airflow rates (may be a dirty filter), and
air temperatures. If the lockout occurs in the morning following a
return from night setback, entering air below machine limits may
be the cause.
6. Oil fan shaft bearing periodically.
­ ake certain that the recycle or recovery equipment used is designed
M
for R-410A. The pressure of R-410A refrigerant is approximately 60
percent greater than that of R-22. Pressure gauges require a range up to
800 PSIG high side and 250 PSIG low side. Recovery cylinders require
a 400 PSIG rating – do not put R-410A in a 300 PSIG rated cylinder
.
Note: The units are designed for the cooling
mode of operation and fail safe to cooling. The
reversing valve is energized for the heating mode of
operation.
All information above is based on ISO standard
13256-1 and tested at these conditions.
WARNING
Recycle/recovery equipment must be designated for
R-410A. R-410A pressure is greater than R-22. Improper
equipment can cause severe injury or death.
IM 1083
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 41 of 42
Table 15: Troubleshooting Refrigeration Circuit
Super
Heat
Subcooling
Air
Temp
Differential
Water
(loops) Temp
Differential
Safety
Lock
Out
Low
High
Low
Low
Low
Low Temp
High
High
Normal
High
Normal
High Pressure
High
High
High
High
Normal
Low
High
Low
High Pressure
Low
Low
Low
Normal
High
High
Low
Low Temp
Low Water Flow Heating
Low
Normal
Low
Normal
Low
Low
High
Low
High
Low Temp
Low Water Flow Cooling
High
High
High
High
Low
Low
High
High Pressure
High Air Flow Heating
Low
Low
Low
Low
High
Low
Low
Low Temp
High Air Flow Cooling
Low
High
Normal
High
Low
Low
Normal
High Pressure
High Water Flow Heating
Normal
Low
Normal
High
Normal
Normal
Low
High Pressure
High Water Flow Cooling
Low
Low
Low
Low
High
Normal
Low
Low Temp
TXV Restricted
High
Low
High
High
Low
Low
Low Temp
Head
Pressure
Suction
Pressure
Charge
Undercharge System
(Possible Leak)
Low
Low
Overcharge System
High
Low Air Flow Heating
Low Air Flow Cooling
Symptom
Compressor
Amp Draw
Normal
Low
Normal
Low
Daikin 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 Representative for warranty details. Refer to Form 933430285Y. To find your local Daikin 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.DaikinAPcom 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.
© 2013 Daikin Applied • www.DaikinApplied.com • (800) 432–1342
IM 1083 (10/13)