Download Carrier WeatherExpert 50N2 Unit installation

WeatherExpert™
50N2,N3,N4,N5,N6,N7,N8,N9
Packaged Rooftop Cooling Units with Optional Electric
Heat, or Hydronic Heat and ComfortLink Controls
Installation Instructions
CONTENTS
Page
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
Step 1 — Perform Jobsite Survey . . . . . . . . . . . . . . . . 2
Step 2 — Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 3 — Roof Mount Unit. . . . . . . . . . . . . . . . . . . . . . . . 2
Step 4 — Slab Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 5 — Install Curb Gasketing. . . . . . . . . . . . . . . . . . 2
Step 6 — Install Field-Fabricated Ductwork . . . . . 12
Step 7 — Rig Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 8 — Connect Condensate Drain. . . . . . . . . . . . 12
Step 9 — Install Outdoor Hoods . . . . . . . . . . . . . . . . . 23
Step 10 — Route Field Wiring . . . . . . . . . . . . . . . . . . . 23
Step 11 — Make Field Electrical Connections . . . 24
Step 12 — Connect Air Pressure Tubing . . . . . . . . 27
• VARIABLE FRQUENCY DRIVE
• POWER EXHAUST
• RETURN FAN
Step 13 — Remove Supply-Fan Shipping
Bracket Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Step 14 — Remove Power Exhaust Shipping
Bracket Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Step 15 — Remove Optional Return-Fan
Shipping Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Step 16 — Install Supply-Air Thermistors . . . . . . . 29
Step 17 — Install Unit Accessories . . . . . . . . . . . . . . 29
Two-Piece Unit Fit Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CONTROLS INSTALLATION . . . . . . . . . . . . . . . . . . 34-44
Constant Volume (CV)/Staged Air Volume
(SAV) Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
• CONTROL WIRING
Variable Air Volume (VAV) Units . . . . . . . . . . . . . . . . . 35
Option and Accessory Control Wiring. . . . . . . . . . . 35
Carrier Comfort Network® (CCN) Interface. . . . . . . 41
Optional UPC Open Installation . . . . . . . . . . . . . . . . . 41
Smoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . 42
GENERAL
This installation instruction contains basic unit installation
information, including installation of thermostats and remote
temperature sensors.
For additional information and service instructions, refer to
the Controls and Troubleshooting literature.
SAFETY CONSIDERATIONS
precautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply.
Follow all safety codes, including ANSI (American National Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
WARNING
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WARNING
Improper installation, adjustment, alteration, service, or
maintenance can cause injury or property damage. Refer to
this manual. For assistance or additional information, consult a qualified installer, service agency, or the gas supplier.
WARNING
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen
and the work area should be well ventilated. Refrigerant in contact with an open flame produces toxic
gases.
d. Cut component connection tubing with tubing cutter
and remove component from unit. Use a pan to catch
any oil that may come out of the lines and as a gage
for how much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury or death.
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500114-01
Printed in U.S.A.
Form 50N-1SI
Pg 1
10-13
Replaces: NEW
Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Level by using unit frame as a reference.
CAUTION
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these procedures may result in damage to equipment.
Step 3 — Roof Mount Unit — Check building codes
for weight distribution requirements. Unit and accessory
weights are shown in Tables 1 and 2. Unit may be mounted on
class A, B, or C roofing material.
ROOF CURB — Assemble and install roof curb as described
in instructions shipped with the accessory. Accessory roof curb
and information required to field fabricate a roof curb is shown
in Fig. 2 and 3. Install insulation, cant strips, roofing and counter flashing as required. For unit condensate drain to function
properly, curb must be level or within tolerances shown in
Fig. 2.
STEEL BEAMS — If roof curb is not used, support unit with
steel beams along its entire length and then support steel as required. As a minimum, unit must be supported across its width
at each lifting lug location.
INSTALLATION
Step 1 — Perform Jobsite Survey — Complete
the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) (ANSI/NFPA [American National Standards Institute/National Fire Protection Association] 70)
for special installation requirements.
2. Determine unit location (from project plans) or select unit
location.
3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.
Step 4 — Slab Mount Unit — Provide a level concrete slab that extends beyond unit cabinet at least 6 inches.
Use gravel apron in front of condenser coil air inlet to prevent
grass and foliage from obstructing airflow. Provide a slab minimum 8-in. thick with sufficient height above grade to allow for
condensate trap as described in Step 8.
CAUTION
Do not lift unit with forklift truck. Move unit with overhead rigging only.
Step 5 — Install Curb Gasketing — After
ductwork has been connected to the roof curb, apply gasket material (1/2-in. thick x 11/2-in. wide neoprene) where indicated.
Single-Thickness Gasketing (See Fig. 4 for Item Numbers)
— Apply gasketing in the following places:
1. Along both side rails (1) — 2 places, full length
2. Along return air end rail (2) — 1 place
3. Around return air internal duct flange (3) — 1 or 2 places
4. Around supply air internal duct flanges (4) — 3 places
5. Along supply section base rail (5) — 1 place
Condenser Section Roof Curb (See Fig. 5) — Apply singlethickness gasket along both side rails (5).
Step 2 — Place Unit — Inspect unit for transportation
damage. If any damage is found file a claim with the transportation agency.
Provide clearance around and above unit for airflow, safety,
and service access. Do not restrict top (area above condenser
fans) in any way. Allow at least 6 ft on all sides for rated performance, code compliance, and service. On units equipped with
power exhaust option, high velocity air is exhausted out the
hood. Unit should be positioned with at least 10 ft clearance between the exhaust hood and any obstruction. See Fig. 1 for
multiple unit minimum spacing.
Check unit dimensional drawings on pages 19-22 for unit
arrangement and minimum performance and service clearances. See Tables 1-6 for additional unit data.
2
D
A
E
F
B
MINIMUM SPACING (ft)
C
UNIT
48
Series
50
Series
A
B
C
D
E
F
12
8
12
10
10
10
10
8
8
10
10
10
a48-8682
Fig. 1 — Multiple Unit Minimum Separation
3
Table 1 — Physical Data 50N Sizes N-T (75-150 Tons Nominal Capacity)
BASE UNIT
NOMINAL CAPACITY (tons)
WEIGHT (lb)
Base Unit*
Split Unit - Main Section
Split Unit - Return Section
COMPRESSORS
Quantity
Oil Charge (oz) per Compressor
Compressor A1
Compressor A2
Compressor A3
Compressor A4
Compressor B1
Compressor B2
Compressor B3
Compressor B4
Stages of Capacity, % Total Capacity
Number of Refrigerant Circuits
REFRIGERANT
Type
Charge Amount
METERING DEVICE
Type... Quantity per Circuit
STANDARD EFFICIENCY UNIT CONDENSER
Material
Number of Total Coils
Total Face Area (sq ft)
HIGH EFFICIENCY UNIT CONDENSER
Material
Number of Total Coils
Total Face Area (sq ft)
EVAP-STANDARD CAPACITY with STD EFFICIENCY
Material
Quantity
Tube Type
Rows (each)
FPI
Total Face Area (sq ft)
EVAP-STANDARD CAPACITY with HIGH
EFFICIENCY
Material
Quantity
Tube Type
Rows (each)
FPI
Total Face Area (sq ft)
EVAP-HIGH CAPACITY with STD EFFICIENCY
Material
Quantity
Tube Type
Rows (each)
FPI
Total Face Area (sq ft)
EVAP-HIGH CAPACITY with HIGH EFFICIENCY
Material
Quantity
Tube Type
Rows (each)
FPI
Total Face Area (sq ft)
CONDENSER FAN, STANDARD EFFICIENCY
Number of Fans
Type
Diameter (in.)
Motor Hp
Nominal Cfm
Motor Rpm
CONDENSER FAN, HIGH EFFICIENCY
Number of Fans
Type
Diameter (in.)
Motor Hp
Nominal Cfm
Motor Rpm
Cu-Al
DWDI
FPI
MBtuh
MCHX
RTPF
SWSI
—
—
—
—
—
—
—
N
75
P
90
Q
105
R
120
S
130
T
150
12,000
9,110
2,890
12,455
9,565
2,890
12,455
9,565
2,890
16,170
12,880
3,290
16,860
13,570
3,290
17,040
13,750
3,290
5
110
ZP182
ZP182
0
0
ZP137
ZP137
ZP137
0
6
110
ZP154
ZP154
ZP154
0
ZP182
ZP182
ZP182
0
6
110
ZP182
ZP182
ZP182
0
ZP182
ZP182
ZP182
0
8
110
ZP154
ZP182
ZP182
ZP182
ZP154
ZP182
ZP182
ZP182
8
110
ZP182
ZP182
ZP182
ZP182
ZP182
ZP182
ZP182
ZP182
0,18,23,41,65,
82,100
0,11,15,33,49,
67,82,100
0,13,17,33,50,
67,83,100
0,8,11,22,35,
48,61,74,87,100
0,9,13,25,38,
50,63,75,88,90
2
2
2
8
110
ZP182
ZP154
ZP154
ZP154
ZP182
ZP154
ZP154
ZP154
0,11,14,28,40,
52,64,76,88,10
0
2
2
2
Scroll
R-410A
See Table 6
CU-AL
2
Cross Hatched
4
16
78.8
Electronically controlled expansion devices... two (2) per circuit
MCHX
Aluminum
Aluminum
Aluminum
Aluminum
4
4
4
6
173.3
173.3
173.3
173.3
MCHX
Aluminum
Aluminum
Aluminum
Aluminum
6
6
6
6
173.3
260.0
260.0
260.0
RTPF
CU-AL
CU-AL
CU-AL
CU-AL
2
2
2
2
Cross Hatched Cross Hatched Cross Hatched
Cross Hatched
4
6
4
6
16
16
16
16
78.8
78.8
99.6
99.6
CU-AL
2
Cross Hatched
4
16
78.8
CU-AL
2
Cross Hatched
4
16
78.8
CU-AL
2
Cross Hatched
6
16
78.8
CU-AL
2
Cross Hatched
6
16
78.8
CU-AL
2
Cross Hatched
6
16
78.8
CU-AL
2
Cross Hatched
6
16
78.8
4
Prop/Metal
30.5
1
41,000
1140
6
Prop/Metal
30
1
81,000
1140
6
Prop/Plastic
30.5
1
81,000
1140
6
Prop/Plastic
30.5
1
81,000
1140
9
Prop/Metal
30
1
93,000
1140
9
Prop/Plastic
30.5
1
122,400
1140
6
Prop/Metal
30.5
1
61,000
1140
9
Prop/Plastic
30.5
1
93,000
1140
9
Prop/Plastic
30.5
1
93,000
1140
9
Prop/Plastic
30.5
1
93,000
1140
9
Prop/Plastic
30.5
1
93,000
1140
NA
Aluminum
4
138.7
Aluminum
4
138.7
Aluminum
6
260.0
NA
CU-AL
2
Cross Hatched
6
16
99.6
RTPF
LEGEND
Copper-to-Aluminum
Double Width, Double Input
Fins per Inch
Btuh in Thousands
Microchannel Heat Exchanger
Round Tube Plate Fin
Single Width, Single Input
CU-AL
CU-AL
2
2
Cross Hatched Cross Hatched
6
4
16
16
78.8
99.6
RTPF
CU-AL
CU-AL
2
2
Cross Hatched Cross Hatched
8
6
16
16
78.8
99.6
RTPF
CU-AL
CU-AL
2
2
Cross Hatched Cross Hatched
8
6
16
16
78.8
99.6
CU-AL
2
Cross Hatched
6
16
99.6
CU-AL
2
Cross Hatched
8
16
99.6
CU-AL
2
Cross Hatched
8
16
99.6
NA
CU-AL
2
Cross Hatched
8
16
99.6
NA
* Base unit includes: economizer dampers and hoods, filter tracks less filters, evaporator
coil mounting less the evaporator, extended plenum, and standard efficiency condenser.
For 75-105 nominal ton units only, base unit weight also includes the short supply fan
section.
4
Table 1 — Physical Data 50N Sizes N-T (75-150 Tons Nominal Capacity) (cont)
BASE UNIT
NOMINAL CAPACITY (tons)
HUMIDI-MIZER® COIL
Type
Material
Quantity
Surface
Total Face Area (sq ft)
STANDARD AND HIGH CAPACITY HOT WATER COILS
Type
Material
Quantity
Tube Type
Rows (each)
FPI
Total Face Area (sq ft)
STANDARD AND HIGH CAPACITY STEAM COIL
Type
Material
Quantity
Tube Type
Connection Size, Length (in.)
Total Face Area (sq ft)
SUPPLY FAN
Standard Supply Fan
Diameter (in.)
Wheel and Blade Type
Maximum Allowable Cfm
Maximum Allowable Speed (rpm)
Shaft Diameter at Pulley (in.)
High Static Supply Fan
Diameter (in.)
Wheel and Blade Type
Maximum Allowable Cfm
Maximum Allowable Speed (rpm)
Shaft Diameter at Pulley (in.)
N
75
P
90
Q
105
R
120
S
130
T
150
43
43
43
MCHX
Aluminum
1
E-Coated
34.5
43
43
RTPF
Aluminum Fin, Copper Tube
2
Smooth
2
12
22.4
26.4
RTPF
Aluminum Fin, Copper Tube, Steel Header, Sloped Casing
1
Smooth
2.50, 3.00
40.1
49.0
28
DWDI Airfoil
42,000
1,800
2.25
32
DWDI Airfoil
60,000
1,550
2.5
40
DWDI Airfoil
52,500
1,250
3
40
DWDI Airfoil
60,000
1,250
3
5
Table 1 — Physical Data 50N Sizes N-T (75-150 Tons Nominal Capacity) (cont)
BASE UNIT
NOMINAL CAPACITY (tons)
OPTIONAL POWER EXHAUST
Power Exhaust
Diameter (in.)
Wheel and Blade Type
Maximum Allowable Cfm
Maximum Allowable Speed (Rpm)
Shaft Diameter at Pulley (in.)
High Static Power Exhaust
Diameter (in.)
Wheel and Blade Type
Maximum Allowable Cfm
Maximum Allowable Speed (Rpm)
Shaft Diameter at Pulley (in.)
OPTIONAL RETURN FAN
Return Fan
Diameter (in.)
Wheel and Blade Type
Maximum Allowable Cfm
Maximum Allowable Speed (Rpm)
Shaft Diameter at Pulley (in.)
High Static Return Fan
Diameter (in.)
Wheel and Blade Type
Maximum Allowable Cfm
Maximum Allowable Speed (Rpm)
Shaft Diameter at Pulley (in.)
MIXED AIR FILTERS
MERV 7 Pleated Filters
Quantity
Size (in.)
MERV 8 Pleated Filters
Quantity
Size (in.)
MERV 14 Pleated Filters
Quantity
Size (in.)
MERV 14 Cartridge Filters, 2 or 4-in. in Pre-Filters
Quantity
Size (in.)
MERV 14 Bag, 2 or 4-in. in Pre-Filters
Quantity
Size (in.)
MERV 15 Bag, 2 or 4-in. in Pre-Filters
Quantity
Size (in.)
FINAL FILTERS
MERV 14 Cartridge Filters, 2 or 4-in. in Pre-Filters
Quantity
Size (in.)
MERV 15 Bag, 2 or 4-in. in Pre-Filters
Quantity
Size (in.)
MERV 17 HEPA, 2 or 4-in. in Pre-Filters
Quantity
Size (in.)
OUTSIDE AIR SCREENS
Standard Hood (Motorized OA and Economizer
Options)
Quantity
Size (in.)
Cu-Al
DWDI
FPI
MBtuh
MCHX
RTPF
SWSI
—
—
—
—
—
—
—
N
75
P
90
Q
105
R
120
S
130
T
150
23
DWDI Forward Curve
60,000
1,200
1.75
20
42,000
1,200
1.75
36
DWDI Forward Curve
42,000
650
2.5
40
DWDI Forward Curve
60,000
600
3
40
SWSI Plenum Airfoil
52,500
1236
2.5
40
SWSI Plenum Airfoil
60,000
1236
2.5
50
45
56
SWSI Plenum Airfoil
60,000
780
60,000
850
60,000
720
3
2 inch, MERV 7
28
20x24x2
4 inch, MERV 8
28
20x24x4
4 inch, MERV 14
28
20x24x4
12 inch, MERV 14 Cartridge Filters
20
(15) 20x24x12, (5) 24x24x12
12 inch, MERV 14 Bag Filters
20
(15) 20x24x12, (5) 24x24x12
19 inch, MERV 15 Bag Filters
20
(15) 20x24x19, (5) 24x24x19
2 inch, MERV 7
28
20x25x2
4 inch, MERV 8
28
20x25x4
4 inch, MERV 14
28
20x25x4
12 inch, MERV 14 Cartridge Filters
20
24x24x12
12 inch, MERV 14 Bag Filters
20
24x24x12
19 inch, MERV 15 Bag Filters
20
24x24x19
12 inch, MERV 14 Cartridge Filters
19
(14) 20x24x12, (5) 24x24x12
19 inch, MERV 15 Bag Filters
19
(14) 20x24x19, (5) 24x24x19
12 inch, MERV 17 HEPA Filters, 99.99%
19
(14) 24x12x12, (5) 24x24x12
12 inch, MERV 14 Cartridge Filters
19
24x24x12
19 inch, MERV 15 Bag Filters
19
24x24x19
12 inch, MERV 17 HEPA Filters, 99.99%
19
24x24x12
Aluminum Frame, Permanent
12 Screens
16 7/8 x 31
LEGEND
Copper-to-Aluminum
Double Width, Double Input
Fins per Inch
Btuh in Thousands
Microchannel Heat Exchanger
Round Tube Plate Fin
Single Width, Single Input
6
16 Screens
16 7/8 x 31
Table 2 — Operating Weights of Options and Accessories (lb)
OPTION OR ACCESSORY
Economizer
Filters
2 in. MERV 7
4 in. MERV 8
4 in. MERV 14
12 in. MERV 14 Bag with 2 in. Pre-Filter
12 in. MERV 14 Bag with 4 in. Pre-Filter
19 in. MERV 15 Bag with 2 in. Pre-Filter
19 in. MERV 15 Bag with 4 in. Pre-Filter
12 in. MERV 14 Cartridge with 2 in. Pre-Filter
12 in. MERV 14 Cartridge with 4 in. Pre-Filter
Field Use Filter Section
Evaporator
Standard Capacity
High Capacity
High-Efficiency Condenser
Extended Chassis
Humidi-MiZer® Dehumidification System
Hot Water Coil
Low Capacity
High Capacity
Steam Coil
Low Capacity
High Capacity
Electric Heat
Low
Medium
High
Blank Section
4 ft
8 ft
Post Filters
19 in. MERV 15 Bag with 2 in. Pre-Filter
19 in. MERV 15 Bag with 4 in. Pre-Filter
12 in. MERV 14 Cart with 2 in. Pre-Filter
12 in. MERV 14 Cart with 4 in. Pre-Filter
12 in. MERV 17 HEPA with 2 in. Pre-Filter
12 in. MERV 17 HEPA with 4 in. Pre-Filter
Supply Fan
High-Static Supply Fan
Standard Supply Fan
PE (Power Exhaust) Fan
High-Static PE Fan
Standard PE Fan
Return Fan
High-Static Return Fan
Standard Return Fan
Supply/PE/Return Motor Includes VFD
460 Volt ODP
7.5 Hp
10 Hp
15 Hp
20 Hp
25 Hp
30 Hp
40 Hp
50 Hp
60 Hp
75 Hp
100 Hp
ODP
TEFC
VFD
N
(75)
140
50N UNIT SIZE (TON NOMINAL CAPACITY)
P
Q
R
S
(90)
(105)
(120)
(130)
140
140
140
140
90
150
175
200
260
300
320
350
370
635
90
150
175
200
260
300
320
350
370
635
90
150
175
200
260
300
320
350
370
635
100
175
210
225
300
335
350
375
400
665
100
175
210
225
300
335
350
375
400
665
100
175
210
225
300
335
350
375
400
665
625
832
310
320
475
625
832
691
320
495
832
1110
691
320
495
795
1053
691
335
510
1053
1402
None
335
510
1053
1402
NA
335
510
671
693
671
693
671
693
759
783
759
783
759
783
837
940
940
1043
940
1043
1063
1187
1063
1187
1063
1187
175
185
200
175
185
215
175
185
215
185
215
225
185
215
225
185
215
225
530
1060
530
1060
530
1060
555
1110
555
1110
555
1110
830
850
880
900
905
930
830
850
880
900
905
930
830
850
880
900
905
930
890
905
930
955
965
980
890
905
930
955
965
980
890
905
930
955
965
980
1274
965
1274
965
1274
965
1169
1071
1169
1071
1169
1071
927
619
927
727
927
727
927
727
927
727
927
727
974
895
1086
895
1298
895
1298
895
1298
895
1298
895
183
209
320
374
417
456
697
784
897
1275
1488
183
209
320
374
417
456
697
784
897
1275
1488
183
209
320
374
417
456
697
784
897
1275
1488
183
209
320
374
417
456
697
784
897
1275
1488
183
209
320
374
417
456
697
784
897
1275
1488
183
209
320
374
417
456
697
784
897
1275
1488
LEGEND
— Open Drip Proof
— Totally Enclosed, Fan Cooled
— Variable Frequency Drive
NOTE: Please refer to E-CAT for selection.
7
T
(150)
140
Table 2 — Operating Weights of Options and Accessories (lb) (cont)
OPTION OR ACCESSORY
Supply/PE/Return Motor Includes VFD
460 Volt TEFC
7.5 Hp
10 Hp
15 Hp
20 Hp
25 Hp
30 Hp
40 Hp
50 Hp
60 Hp
75 Hp
100 Hp
Supply/PE/Return Motor Includes VFD
575 Volt ODP
7.5 Hp
10 Hp
15 Hp
20 Hp
25 Hp
30 Hp
40 Hp
50 Hp
60 Hp
75 Hp
100 Hp
Supply/PE/Return Motor Includes VFD
575 Volt TEFC
7.5 Hp
10 Hp
15 Hp
20 Hp
25 Hp
30 Hp
40 Hp
50 Hp
60 Hp
75 Hp
100 Hp
Supply/PE/Return Motor Includes VFD Bypass
7.5 Hp
10 Hp
15 Hp
20 Hp
25 Hp
30 Hp
40 Hp
50 Hp
60 Hp
75 Hp
100 Hp
Condenser Grilles
Standard Efficiency
High Efficiency
Condenser Louvers
Standard Efficiency
High Efficiency
Service Valves and Replacable Core Filter Drier
Low Ambient
UV Lights
Marine Lights
Split - 2 piece unit
ODP
TEFC
VFD
50N UNIT SIZE (TON NOMINAL CAPACITY)
P
Q
R
S
(90)
(105)
(120)
(130)
T
(150)
267
283
368
437
576
604
991
925
1163
1275
1488
267
283
368
437
576
604
991
925
1163
1275
1488
267
283
368
437
576
604
991
925
1163
1275
1488
267
283
368
437
576
604
991
925
1163
1275
1488
267
283
368
437
576
604
991
925
1163
1275
1488
267
283
368
437
576
604
991
925
1163
1275
1488
186
204
327
369
433
456
697
784
897
1194
1488
186
204
327
369
433
456
697
784
897
1194
1488
186
204
327
369
433
456
697
784
897
1194
1488
186
204
327
369
433
456
697
784
897
1194
1488
186
204
327
369
433
456
697
784
897
1194
1488
186
204
327
369
433
456
697
784
897
1194
1488
228
277
382
436
616
652
795
897
933
1194
1488
228
277
382
436
616
652
795
897
933
1194
1488
228
277
382
436
616
652
795
897
933
1194
1488
228
277
382
436
616
652
795
897
933
1194
1488
228
277
382
436
616
652
795
897
933
1194
1488
228
277
382
436
616
652
795
897
933
1194
1488
10
10
10
20
20
40
40
40
40
60
75
10
10
10
20
20
40
40
40
40
60
75
10
10
10
20
20
40
40
40
40
60
75
10
10
10
20
20
40
40
40
40
60
75
10
10
10
20
20
40
40
40
40
60
75
10
10
10
20
20
40
40
40
40
60
75
100
100
100
125
100
125
100
125
125
125
125
NA
225
225
40
50
100
75
268
225
290
45
50
100
75
268
225
290
45
50
100
75
268
225
290
50
50
130
75
280
290
290
50
50
130
75
280
290
NA
50
50
130
75
280
N
(75)
LEGEND
— Open Drip Proof
— Totally Enclosed, Fan Cooled
— Variable Frequency Drive
NOTE: Please refer to E-CAT for selection.
8
Table 3 — Supply Fan and Drive Data
FAN
Standard Fan
75-105 Tons
Nominal
Capacity
Standard Fan
120-150 Tons
Nominal
Capacity
High Static
75-150 Tons
Nominal
Capacity
MOTOR
HP
50
40
30
25
20
60
50
40
30
25
100
75
60
50
40
30
25
MOTOR
RPM
1770
1770
1765
1765
1765
1775
1770
1770
1765
1765
1775
1775
1775
1770
1770
1765
1765
MOTOR
SHAFT
SIZE (in.)
2.125
2.125
1.875
1.875
1.625
2.375
2.125
2.125
1.875
1.875
2.875
2.375
2.375
2.125
2.125
1.875
1.875
FAN
RPM
1800
1600
1450
1400
1250
1550
1400
1300
1200
1100
1250
1100
1050
1000
900
800
750
FAN
SHAFT
SIZE (in.)
2.25
2.5
3
DRIVE
SHEAVE
BROWNING
4B5V70
3B5V68
3B5V70
3B5V64
3B5V56
4B5V70
4B5V70
3B5V68
3B5V70
3B5V64
5R5V90
4B5V80
4B5V70
4B5V70
3B5V68
3B5V70
3B5V64
BUSHING
TYPE
B 2 1/8
B 2 1/8
B 1 7/8
B 1 7/8
B 1 5/8
B 2 3/8
B 2 1/8
B 2 1/8
B 1 7/8
B 1 7/8
R1 2 7/8
B 2 3/8
B 2 3/8
B 2 1/8
B 2 1/8
B 1 7/8
B 1 7/8
DRIVEN
SHEAVE
BROWNING
4B5V68
3B5V74
3B5V86
3B5V80
3B5V80
4R5V80
4R5V90
3R5V92
3R5V103
3R5V103
5B5V124
4R5V132
4R5V118
4R5V125
3R5V140
3B154R
3B154R
BUSHING
TYPE
B 2 1/4
B 2 1/4
B 2 1/4
B 2 1/4
B 2 1/4
R1 2 1/2
R1 2 1/2
R1 2 1/2
R1 2 1/2
R1 2 1/2
R1 3
R1 3
R1 3
R1 3
R1 3
R1 3
R1 3
BELTS
5VX530
5VX540
BX55
BX53
BX53
5VX600
5VX630
5VX630
5VX670
5VX660
5VX830
5VX840
5VX800
5VX830
5VX850
BX88
BX87
QTY OF
BELTS
4
3
3
3
3
4
4
3
3
3
5
4
4
4
3
3
3
FAN SPEED
(rpm)
1821/1821
1628/1628
1448/1448
1425/1425
1255/1255
1595/1595
1412/1412
1328/1328
1229/1229
1125/1125
1264/1264
1098/1098
1077/1077
1013/1013
918/918
821/821
753/753
BELTS
5VX570
5VX560
BX52
5VX580
BX51
BX51
5VX540
5VX540
5VX580
5VX550
BX52
5VX590
BX51
BX53
5VX830
BX86
BX85
BX82
5VX950
BX82
AX81
5VX930
5VX950
5VX930
BX103
5VX1000
5VX1000
BX112
QTY OF
BELTS
3
3
3
2
2
2
4
3
3
3
3
2
2
2
3
3
3
3
2
2
2
4
4
3
3
3
3
2
FAN SPEED
(rpm)
1229/1229
1125/1125
1120/1120
1128/1128
1117/1117
1120/1120
1225/1225
1197/1197
1129/1129
1125/1125
1120/1120
1036/1036
1036/1036
927/927
657/657
635/635
583/583
557/557
490/490
460/460
425/425
597/597
596/596
579/579
509/509
488/488
428/428
391/391
Table 4 — Power Exhaust Fan and Drive Data
FAN
Standard
Fan 75
Tons
Nominal
Capacity
Standard
Fan 90-150
Tons
Nominal
Capacity
High Static
75-090 Tons
Nominal
Capacity
High Static
105-150
Tons
Nominal
Capacity
MOTOR
HP
30
25
20
15
10
7.5
50
40
30
25
20
15
10
7.5
40
30
25
20
15
10
7.5
60
50
40
30
25
20
15
MOTOR
RPM
1765
1765
1765
1770
1755
1760
1770
1770
1765
1765
1765
1770
1755
1760
1770
1765
1765
1765
1770
1755
1760
1775
1770
1770
1765
1765
1765
1770
MOTOR
SHAFT
SIZE (in.)
1.875
1.875
1.625
1.625
1.375
1.375
2.125
2.125
1.875
1.875
1.625
1.625
1.375
1.375
2.125
1.875
1.875
1.625
1.625
1.375
1.375
2.375
2.125
2.125
1.875
1.875
1.625
1.625
FAN
RPM
1200
1150
1125
1100
1100
1100
1200
1175
1150
1125
1100
1050
1000
950
650
625
600
550
500
450
425
600
575
550
525
500
450
400
FAN
SHAFT
SIZE (in.)
1.75
1.75
2.5
3
DRIVE
SHEAVE
BROWNING
3B5V70
3B5V64
3B5V56
2B5V64
2BK52H
2BK52H
4B5V70
3B5V68
3B5V70
3B5V64
3B5V56
2B5V64
2BK52H
2BK52H
3B5V68
3B5V70
3B5V64
3B5V56
2B5V64
2BK52H
2BK52H
4B5V70
4B5V70
3B5V68
3B5V70
3B5V64
3B5V56
2B5V64
9
BUSHING
TYPE
B 1 7/8
B 1 7/8
B 1 5/8
B 1 5/8
H 1 3/8
H 1 3/8
B 2 1/8
B 2 1/8
B 1 7/8
B 1 7/8
B 1 5/8
B 1 5/8
H 1 3/8
H 1 3/8
B 2 1/8
B 1 7/8
B 1 7/8
B 1 5/8
B 1 5/8
H 1 3/8
H 1 3/8
B 2 3/8
B 2 1/8
B 2 1/8
B 1 7/8
B 1 7/8
B 1 5/8
B 1 5/8
DRIVEN
SHEAVE
BROWNING
3R5V103
3R5V103
3B5V90
2Q5V103
2B5V74
2B5V74
4R5V103
3R5V103
3B5V110
3R5V103
3B5V90
2B5V110
2B5V80
2B5V90
35V1870E
3TB200
3TB200
3TB184
25V2360E
2TB184
2TB184
4R5V212
4R5V212
3R5V212
3B250R
35V2360E
35V2360E
2B300R
BUSHING
TYPE
R1 1 3/4
R1 1 3/4
B 1 3/4
Q1 1 3/4
B 1 3/4
B 1 3/4
R1 1 3/4
R1 1 3/4
B 1 3/4
R1 1 3/4
B 1 3/4
B 1 3/4
B 1 3/4
B 1 3/4
E 2 1/2
Q1 2 1/2
Q1 2 1/2
Q1 2 1/2
E 2 1/2
Q1 2 1/2
Q1 2 1/2
R1 3
R1 3
R1 3
R1 3
E3
E3
R1 3
Table 5 — Return Fan Drive Data
FAN
Standard
Return Fan
All Sizes
High Static
Return Fan
75 Tons
Nominal
Capacity
High Static
Return Fan
90 Tons
Nominal
Capacity
High Static
Return Fan
105-150
Tons
Nominal
Capacity
MOTOR MOTOR
HP
RPM
50
1770
40
1770
30
1765
25
1765
20
1765
15
1770
10
1755
7.5
1760
30
1765
25
1765
15
1770
10
1755
7.5
1760
40
1770
30
1765
25
1765
20
1765
15
1770
10
1755
7.5
1760
60
1775
50
1770
40
1770
30
1765
25
1765
20
1765
15
1770
10
1755
MOTOR
SHAFT
SIZE (in.)
2.125
2.125
1.875
1.875
1.625
1.625
1.375
1.375
1.875
1.875
1.625
1.375
1.375
2.125
1.875
1.875
1.625
1.625
1.375
1.375
2.375
2.125
2.125
1.875
1.875
1.625
1.625
1.375
FAN
RPM
1236
1149
1025
940
930
890
770
720
850
825
680
600
550
780
750
720
650
600
520
480
720
680
650
580
550
500
450
400
FAN
SHAFT
SIZE (in.)
2.5
3
3
3
DRIVE
SHEAVE
BROWNING
4B5V70
3B5V68
3B5V70
3B5V64
3B5V56
2B5V64
2BK52H
2BK52H
3B5V70
3B5V64
2B5V64
2BK52H
2BK52H
3B5V68
3B5V70
3B5V64
3B5V56
2B5V64
2BK52H
2BK52H
4B5V70
4B5V70
3B5V68
3B5V70
3B5V64
3B5V56
2B5V64
2BK52H
DRIVEN
BUSHING
SHEAVE
BUSHING
TYPE
BROWNING
TYPE
B 2 1/8
4R5V103
R1 2 1/2
B 2 1/8
3R5V109
R1 2 1/2
B 1 7/8
3TB124
Q1 2 1/2
B 1 7/8
3TB124
Q1 2 1/2
B 1 5/8
3TB110
Q1 2 1/2
B 1 5/8
2Q5V132
Q1 2 1/2
H 1 3/8
2TB110
Q1 2 1/2
H 1 3/8
2TB110
Q1 2 1/2
B 1 7/8
3R5V150
R1 3
B 1 7/8
3R5V140
R1 3
B 1 5/8
2B160R
R1 3
H 1 3/8
2B154R
R1 3
H 1 3/8
2B154R
R1 3
B 2 1/8
3R5V160
R1 3
B 1 7/8
3B160R
R1 3
B 1 7/8
3B160R
R1 3
B 1 5/8
3B154R
R1 3
B 1 5/8
2B200R
R1 3
H 1 3/8
2B160R
R1 3
H 1 3/8
2B184R
R1 3
B 2 3/8
4B174R
R1 3
B 2 1/8
45V1870E
E3
B 2 1/8
35V1870E
E3
B 1 7/8
3R5V212
R1 3
B 1 7/8
3B200R
R1 3
B 1 5/8
3B200R
R1 3
B 1 5/8
2B250R
R1 3
H 1 3/8
2B200R
R1 3
BELTS
5VX1000
5VX1000
BX98
BX98
BX93
5VX1000
BX90
AX89
5VX1120
5VX1120
BX112
BX105
BX105
5VX1230
BX120
BX120
BX113
BX123
BX112
BX116
BX133
5VX1320
5VX1320
5VX1400
AX128
BX128
AX136
AX128
QTY OF
BELTS
4
3
3
3
3
2
2
2
3
3
2
2
2
3
3
3
3
2
2
2
4
4
3
3
3
3
2
2
FAN SPEED
(rpm)
1232/1232
1131/1131
1015/1015
931/931
922/922
878/878
761/761
717/717
841/841
825/825
728/728
548/548
549/549
768/768
790/790
725/725
663/663
584/584
528/528
461/461
693/693
676/676
657/657
594/594
555/555
513/513
444/444
392/392
Table 6 — Refrigerant Charge
UNIT SIZE
(NOMINAL CAPACITY, TONS)
N
(75)
P
(90)
Q
(105)
R
(120)
S
(130)
T
(150)
UNIT CONFIGURATION
Standard Capacity Standard Efficiency
High Capacity Standard Efficiency
Standard Capacity High Efficiency
High Capacity High Efficiency
Standard Capacity Standard Efficiency
High Capacity Standard Efficiency
Standard Capacity High Efficiency
High Capacity High Efficiency
Standard Capacity Standard Efficiency
High Capacity Standard Efficiency
Standard Capacity High Efficiency
High Capacity High Efficiency
Standard Capacity Standard Efficiency
High Capacity Standard Efficiency
Standard Capacity High Efficiency
High Capacity High Efficiency
Standard Capacity Standard Efficiency
High Capacity Standard Efficiency
Standard Capacity High Efficiency
High Capacity High Efficiency
Standard Capacity Standard Efficiency
High Capacity Standard Efficiency
10
CHARGE (LB)
CHARGE (LB)
UNITS WITHOUT HUMIDI-MIZER®
SYSTEM
UNITS WITH HUMIDI-MIZER®
SYSTEM
Circuit A
46.5
62.9
50.2
67.0
55.4
67.8
59.0
73.8
71.5
89.5
77.5
91.6
59.9
80.3
66.5
87.1
84.9
106.0
84.5
105.5
82.5
103.5
Circuit B
52.6
69.0
56.5
73.5
52.0
68.5
57.2
73.8
67.9
85.9
72.9
92.2
57.1
77.1
63.3
83.3
81.2
101.5
80.7
101.0
82.0
103.2
Circuit A
46.5
62.9
50.2
67.0
55.4
67.8
59.0
73.8
71.5
89.5
77.5
91.6
59.9
80.3
66.5
87.1
84.9
106.0
84.5
105.5
82.5
103.5
Circuit B
69.6
86.0
73.5
93.0
71.5
88.0
76.7
94.0
87.4
105.4
92.4
111.7
76.6
96.6
82.8
102.8
100.7
121.0
100.2
120.5
101.5
122.7
11
O'-13/16"
[21]
0'-3"
[76.2]
10'-8 7/8"
[3274]
0'-1"
[25.4]
(CORNER CONNECTIONS AND
SPLICE PLATE CONNECTIONS)
RETURN
BASE RAIL CROSS SECTION
TYP ALL BASE RAILS
0'-1 3/4"
[44]
4. CROSS SUPPORTS EQUALLY SPACED APPROX 5'-6' APART
3. DIMENSIONS ARE IN INCHES [ MILLIMETERS].
2. ROOF CURB: 14 GA.[VA03-56] STL.
1. ROOF CURB ACCESSORY IS SHIPPED DISASSEMBLED.
NOTES:
0'-3"
[76]
"A"
1'-2"
[356]
4'-1-1/2"
[1257]
Fig. 2 — Roof Curb
RIGID INSULATION
(FIELD SUPPLIED)
GASKET
(SUPPLIED WITH CURB)
BASEPAN
"B"
SEE NOTE 4
SEE NOTE 4
SUPPLY
ROOFING MATERIAL
(FIELD SUPPLIED)
CANT STRIP
(FIELD SUPPLIED)
ROOFING FELT
(FIELD SUPPLIED)
"C"
11'-3/8"
[3363]
COUNTER FLASHING
(FIELD SUPPLIED)
NAIL
8'-9"
[2667]
"D" SUPPORT
SEE CONDENSER
SECTION
1.0
DEG.
A
2.0
IN.
.50
DEG.
DIMENSIONS
(degrees and inches)
B
.75
IN.
1'-1/16"
[309]
CONDENSER
AND
COMPRESSOR
END
B
B
CONDENSER
AND
COMPRESSOR
END
CONDENSER
AND
COMPRESSOR
END
*From edge of unit to horizontal.
UNIT LEVELING TOLERANCES
0'-1 3/4"
[44]
(TYP ALL SIDES)
10'-8 7/8"
[3274]
A
a48-8683
50N Roof Curb Sizes N, P, Q
(75-105 Ton Nominal Capacity)
PART NUMBER*
CRRFCURB201A00
CRRFCURB202A00
CRRFCURB203A00
CRRFCURB204A00
CRRFCURB205A00
CRRFCURB206A00
CRRFCURB207A00
CRRFCURB208A00
CRRFCURB209A00
CRRFCURB210A00
CRRFCURB211A00
CRRFCURB212A00
CRRFCURB213A00
CRRFCURB214A00
CRRFCURB215A00
CRRFCURB216A00
CRRFCURB217A00
CRRFCURB218A00
CRRFCURB219A00
CRRFCURB220A00
CRRFCURB221A00
CRRFCURB222A00
CRRFCURB223A00
CRRFCURB224A00
DIMENSION
A
296.11
311.20
320.11
335.20
356.61
371.70
380.61
395.70
419.36
434.45
443.36
485.45
467.61
479.86
482.70
491.61
494.95
503.86
506.70
518.95
528.11
543.20
552.11
567.20
DIMENSION
B
193.61
208.70
217.61
232.70
254.11
269.20
278.11
293.20
316.86
331.95
340.86
382.95
365.11
377.36
380.20
389.11
392.45
401.36
404.20
416.45
425.61
440.70
449.61
464.70
50N Roof Curb Sizes R, S, T
(120-150 Ton Nominal Capacity)
DIMENSION
C
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
PART NUMBER*
CRRFCURB249A00
CRRFCURB250A00
CRRFCURB251A00
CRRFCURB252A00
CRRFCURB253A00
CRRFCURB254A00
CRRFCURB255A00
CRRFCURB256A00
CRRFCURB257A00
CRRFCURB258A00
CRRFCURB259A00
CRRFCURB260A00
DIMENSION
A
321.04
345.04
381.54
405.54
444.29
468.29
492.54
504.79
516.54
528.79
553.04
577.04
DIMENSION
B
218.54
242.54
279.04
303.04
341.79
365.79
390.04
402.29
414.04
426.29
450.54
474.54
DIMENSION
C
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
49.50
* Use Applied Rooftop Builder program to select the proper roof curb.
Fig. 2 — Roof Curb (cont)
Step 6 — Install Field-Fabricated Ductwork
covered with a vapor barrier. Outlet grilles must not lie directly
below unit discharge.
Design supply duct strong enough to handle expected static
pressures. Field-fabricated ductwork for horizontal supply/return units must be attached to the unit.
WARNING
For vertical supply and return units, tools or parts could
drop into ductwork and cause an injury. Install a 90-degree
elbow in the supply and return ductwork between the unit
and the conditioned space. If a 90-degree elbow cannot be
installed, then a grille of sufficient strength and density
should be installed to prevent objects from falling into the
conditioned space. Failure to follow these instructions
could result in personal injury or property damage due to
falling objects.
Step 7 — Rig Unit — Do not drop unit; keep upright.
Use spreader bars over the unit to prevent sling or cable damage. Sheets of plywood placed along the condenser coils will
provide additional protection. All lifting lugs MUST be used
when lifting unit. Level by using unit frame as a reference. See
Fig. 6-8 for information. Unit and accessory weights are shown
in Tables 1 and 2. Weight distribution and center of gravity can
be found in Fig. 9. Additional unit dimensional data can be
found in Fig. 10 and 11.
Field-fabricated ductwork for vertical supply/vertical return
units must be attached to the roof curb, or to the support steel,
prior to the final rigging and installation of the unit. Supply and
return duct dimensions are shown in Fig. 2.
To attach ductwork to roof curb, insert duct approximately
10 to 11 in. up into roof curb. Connect ductwork to 14-gage
roof curb material with sheet metal screws driven from inside
the duct.
Secure all ducts to the building structure, using flexible duct
connectors between roof curbs and ducts as required. Ducts
passing through an unconditioned space must be insulated and
Step 8 — Connect Condensate Drain — The
drain is a 2-in. FPT pipe connection located on the right-hand
side of the unit looking at the unit from the return air end. See
Fig. 12 and 13. Figure 14 shows the additional length of units
with an extended chassis.
With field-supplied fittings and pipe sections, plumb the primary condensate drain to the 2-in. FPT connector on the base
rail. Use a trap height of at least 7-inches. See Fig. 14 and 12.
Apply a bead of RTV or similar sealant around the pipe joint at
the connector in the base rail.
12
13
ACCESSORY PART
NUMBER
UNIT SIZE
NOMINAL TONS
75 ALL
90 STANDARD
EFFICIENCY
90 HIGH EFFICIENCY
105 STADARD
EFFICIENCY
105 HIGH EFFICIENCY
120 STANDARD
EFFICIENCY
120 HIGH EFFICIENCY
130 ALL
150 ALL
Fig. 3 — Roof Curb Condenser Section
NOTES:
1. ROOF CURB ACCESSORY CRRFCURB186A00 AND 287A00 IS SHIPPED DISASSEMBLED.
2. DIMENSIONS ARE IN INCHES [ MILLIMETERS].
3. ROOF CURB: 14 GA.[VA03-56] STL.
ROOF CURB PANS: 16 GA. [VA03-56] STL.
CROSS SUPPORTS: 14 GA. [VA03/56]
a48-8745
129.50
181.50
—
YES
—
YES
—
YES
YES
YES
—
CRRFCURB287A00
YES
—
YES
—
YES
—
—
—
CRRFCURB286A00
—
181.50
181.50
181.50
129.50
181.50
129.50
181.50
129.50
—
YES
DIM.
D
129.50
COND COIL 3V
COND COILS 2V
Roof Curb Condenser Support
—
—
—
10.62
9.25
—
—
—
—
—
DIM.
E
—
a48-8724
5 ALONG SUPPLY
SECTION END RAIL
SUPPLY
4
1
3
RETURN
2
Fig. 4 — Gasket Location on Roof Curb
5
5
Fig. 5 — Gasket Location — Condenser Section Roof Curb
14
CAUTION - NOTICE TO RIGGERS:
ALL PANELS MUST BE IN PLACE WHEN RIGGING.
NOTE: Rig with 8 cables and spread with minimum (2) 148" spreader bars.
NOMINAL TOTAL
CAPACITY WEIGHT
(tons)
(lb)
50 Series
Non-Split
75
90
105
120
130
150
16,927
18,382
18,873
22,523
22,871
23,164
CENTER OF
GRAVITY
A (in.)
B (in.)
LIFTING LUG LOCATION
L1 (in.)
L2 (in.)
L3 (in.)
L4 (in.)
UNIT
LENGTH
(in.)
238.3
269.4
270.5
271.9
277.9
278.6
51.8
103.8
103.8
103.8
103.8
103.8
393.2
445.2
445.2
455.0
455.0
455.0
443.8
495.8
495.8
505.6
505.6
505.6
67.2
67.2
67.2
67.2
67.2
67.2
144.8
196.8
196.8
196.8
196.8
196.8
213.4
265.4
265.4
265.4
265.4
265.4
NOTE: Weights are for typical featured units with economizer, barometric relief, standard filters,
high-capacity evaporator, high efficiency, high supply-fan with largest motor, high power exhaust
with largest motor, no heat, no post section, no Humidi-MiZer system, no extended chassis, no split,
no field filter section. Actual unit weight and lug location will vary based on option selection.
0
L1
L2
L3
L4
Fig. 6 — 50N 75-150 Ton Non-Split Rigging
15
CAUTION - NOTICE TO RIGGERS:
ALL PANELS MUST BE IN PLACE WHEN RIGGING.
NOTE: Rig with 10 cables and spread with minimum 148" spreader bars.
NOMINAL
CAPACITY
(tons)
75
90
50 Series
105
Split 120
Main Unit
130
150
TOTAL
WEIGHT
(lb)
CENTER OF
GRAVITY
A (in.)
B (in.)
14,529
15,778
16,269
19,527
19,875
20,055
279
310
315
310
320
320
67
67
67
67
67
67
LIFTING LUG LOCATION
L1 (in.) L2 (in.) L3 (in.) L4 (in.)
56
108
108
108
108
108
149
201
201
201
201
201
302.2
354.2
354.2
354.2
354.2
354.2
370.9
422.9
422.9
422.9
422.9
422.9
L5 (in.)
UNIT
LENGTH
(in.)
481.4
533.4
533.4
543.2
543.2
543.2
494.9
546.9
546.9
556.7
556.7
556.7
NOTE: Weights are for typical featured units with economizer, barometric relief, cartridge filters, highcapacity evaporator, high efficiency, high supply fan with largest motor, high return fan with largest motor,
high electric heat, 8 foot blank section with post filters, extended chassis with Humidi-MiZer system, split,
no field filter section. Actual unit weight and lug location will vary based on option selection.
0
L1
L2
L3
L4
L5
Fig. 7 — 50N 75-150 Ton Split (Main Unit) Rigging
16
CAUTION - NOTICE TO RIGGERS:
ALL PANELS MUST BE IN PLACE WHEN RIGGING.
NOTE: Rig with 4 cables and spread with (2) 148" spreader bars.
NOMINAL TOTAL
CAPACITY WEIGHT
(lb)
(tons)
75
5,098
90
5,451
50 Series
Split 105
5,663
Return
120
6,150
Section
130
6,150
150
6,305
CENTER OF
GRAVITY
A (in.) B (in.)
76
67
78
67
78
67
78
67
78
67
78
67
LIFTING LUG LOCATION
L1 (in.)
L2 (in.)
5.4
98.2
5.4
98.2
5.4
98.2
5.4
98.2
5.4
98.2
5.4
98.2
UNIT
LENGTH
(in.)
148.8
148.8
148.8
148.8
148.8
148.8
NOTE: Weights are for typical featured units with economizer, barometric relief, cartridge filters, high-capacity
evaporator, high efficiency, high supply fan with largest motor, high return fan with largest motor, high gas
heat, 8 foot blank section with post filters, extended chassis with Humidi-MiZer system, split, no field filter
section. Actual unit weight and lug location will vary based on option selection.
0
L1
L2
Fig. 8 — 50N 75-150 Ton Split (Return Section) Rigging
17
A
1
0
3
0
B
Cond End
0
0
Return End
0
0
a48-8793
2
50 Series Non-Split
50 Series Split
4
NOMINAL
CAPACITY
(tons)
75
90
105
120
130
150
75
90
105
120
130
150
CORNER WEIGHTS (lb)
1
3,958
4,238
4,330
5,257
5,201
5,253
4,453
4,726
4,811
5,777
5,693
5,742
2
3,880
4,154
4,245
5,153
5,099
5,149
4,365
4,633
4,716
5,663
5,580
5,629
3
4,590
5,044
5,200
6,117
6,348
6,445
5,458
5,994
6,264
7,211
7,471
7,569
TOTAL (lb)
4
4,500
4,945
5,098
5,996
6,223
6,318
5,351
5,876
6,141
7,069
7,323
7,420
16,927
18,382
18,873
22,523
22,871
23.164
19,627
21,229
21,932
25,719
26,067
26,360
Fig. 9 — Weight Distribution and Center of Gravity
18
CENTER OF
GRAVITY
A (in.)
B (in.)
238.3
67.2
269.4
67.2
270.5
67.2
271.9
67.2
277.9
67.2
278.6
67.2
352.1
67.2
386.5
67.2
391.0
67.2
389.3
67.2
397.9
67.2
398.7
67.2
Fig. 10 — 50N Unit Sizes N, P, Q (75-105 Ton Nominal Capacity)
A50-8823
19
NOMINAL
FIELD USE
EXTENDED SUPPLY
BLANK 2-PIECE
CAPACITY/
FILTER
COND
CHASSIS
FAN
SECTION UNIT
EFFICIENCY
SECTION
NO
NO
2
NO
4 FT
YES
2
8 FT
YES
2
STD
NO
NO
2
YES
4 FT
YES
2
8 FT
YES
2
NO
NO
NO
2
NO
4 FT
YES
2
8 FT
YES
2
HIGH
NO
NO
2
YES
4 FT
YES
2
75 ALL
8 FT
YES
2
90 STD EFF
NO
NO
2
105 STF EFF
NO
4 FT
YES
2
8 FT
YES
2
STD
NO
NO
2
YES
4 FT
YES
2
8 FT
YES
2
YES
NO
NO
2
NO
4 FT
YES
2
8 FT
YES
2
HIGH
NO
NO
2
YES
4 FT
YES
2
8 FT
YES
2
NO
NO
3
NO
4 FT
YES
3
8 FT
YES
3
STD
NO
NO
3
YES
4 FT
YES
3
8 FT
YES
3
NO
3
NO
NO
4 FT
YES
3
NO
8 FT
YES
3
HIGH
NO
NO
3
YES
4 FT
YES
3
8 FT
YES
3
90 HI EFF
105 HI EFF
NO
NO
3
NO
4 FT
YES
3
8 FT
YES
3
STD
NO
NO
3
YES
4 FT
YES
3
8 FT
YES
3
YES
NO
NO
3
NO
4 FT
YES
3
8 FT
YES
3
HIGH
NO
NO
3
YES
4 FT
YES
3
8 FT
YES
3
A
B
D
F
G
H
J
K
433.11
556.36
604.61
493.61
616.86
665.11
448.20
571.45
619.70
508.70
631.95
680.20
457.11
580.36
628.61
517.61
640.86
689.11
472.20
595.45
643.70
532.70
655.95
704.20
485.11
608.36
656.61
545.61
668.86
717.11
500.20
623.45
671.70
560.70
683.95
732.20
509.11
632.36
680.61
569.61
692.86
741.11
524.20
647.45
695.70
584.70
707.95
756.20
249.42
372.67
420.92
309.92
433.17
481.42
264.51
387.76
436.01
325.01
448.26
496.51
273.42
396.67
444.92
333.92
457.17
505.42
288.51
411.76
460.01
349.01
472.26
520.51
249.42
372.67
420.92
309.92
433.17
481.42
264.51
387.76
436.01
325.01
448.26
496.51
273.42
396.67
444.92
333.92
457.17
505.42
288.51
411.76
460.01
349.01
472.26
520.51
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
177.02
195.27
195.27
237.52
255.77
255.77
434.35
557.60
605.85
494.85
618.10
666.35
449.44
572.69
620.94
509.94
633.19
681.44
458.35
581.60
629.85
518.85
642.10
690.35
473.44
596.69
644.94
533.94
657.19
705.44
486.35
609.60
657.85
546.85
670.10
718.35
501.44
624.69
672.94
561.94
685.19
733.44
510.35
633.60
681.85
570.85
694.10
742.35
525.44
648.69
696.94
585.94
709.19
757.44
202.75
221.00
221.00
263.25
281.50
281.50
217.84
236.09
236.09
278.34
296.59
296.59
226.75
245.00
245.00
287.25
305.50
305.50
241.84
260.09
260.09
302.34
320.59
320.59
202.75
221.00
221.00
263.25
281.50
281.50
217.84
236.09
236.09
278.34
296.59
296.59
226.75
245.00
245.00
287.25
305.50
305.50
241.84
260.09
260.09
302.34
320.59
320.59
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
—
—
—
—
—
—
—
—
—
—
—
—
185.75
204.00
204.00
246.25
264.50
264.50
185.75
204.00
204.00
246.25
264.50
264.50
—
—
—
—
—
—
—
—
—
—
—
—
185.75
204.00
204.00
264.50
264.50
264.50
185.75
204.00
204.00
246.25
264.50
264.50
248.36
371.61
419.86
308.86
432.11
480.36
263.45
386.70
434.95
323.95
447.20
495.45
272.36
395.61
443.86
332.86
456.11
504.36
287.45
410.70
458.95
347.95
471.20
519.45
248.36
371.61
419.86
308.86
432.11
480.36
263.45
386.70
434.95
323.95
447.20
495.45
272.36
395.61
443.86
332.86
456.11
504.36
287.45
410.70
458.95
347.95
471.20
519.45
Condenser Detail
UNIT
75 ALL
75 ALL
90 STANDARD EFFICIENCY
90 HIGH EFFICIENCY
90 STANDARD EFFICIENCY
105 STANDARD EFFICIENCY
105 HIGH EFFICIENCY
105 STANDARD EFFICIENCY
COND
COILS 2V
YES
YES
YES
—
YES
YES
—
YES
COND COIL
3V
—
—
—
YES
—
—
YES
—
LOW
SOUND
NO
YES
NO
YES
YES
NO
YES
YES
DIMENSION
“S”
92.62
98.06
92.62
98.06
98.06
98.06
98.06
98.06
Fig. 10 — 50N Unit Sizes N, P, Q (75-105 Ton Nominal Capacity) (cont)
20
Fig. 11 — 50N Unit Sizes R, S, T (120-150 Ton Nominal Capacity)
a50-8824
21
NOMINAL
EXTENDED
CAPACITY/
CHASSIS
EFFICIENCY
FIELD
USE
FILTER
SECTION
NO
NO
YES
120 STD EFF
NO
YES
YES
NO
NO
YES
120 HI EFF
130 ALL
150 STD EFF
NO
YES
YES
BLANK
SECTION
2-PIECE
UNIT
COND
A
B
D
F
G
H
J
K
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
4 FT
8 FT
NO
YES
YES
NO
YES
YES
NO
YES
YES
NO
YES
YES
NO
YES
YES
NO
YES
YES
NO
YES
YES
NO
YES
YES
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
258.04
581.29
629.54
518.54
641.79
690.04
482.04
605.29
653.54
542.54
665.79
714.04
510.04
633.29
681.54
570.54
693.79
742.04
534.04
657.29
705.54
594.54
717.79
766.04
274.35
397.60
445.85
334.85
458.10
506.35
298.35
421.60
469.85
358.85
482.10
530.35
274.35
397.60
445.85
334.85
458.10
506.35
298.35
421.60
469.85
358.85
482.10
530.35
186.86
205.11
205.11
247.36
265.61
265.61
186.86
205.11
205.11
247.36
265.61
265.61
186.86
205.11
205.11
247.36
265.61
265.61
186.86
205.11
205.11
247.36
265.61
265.61
459.28
582.53
630.78
519.78
643.03
691.28
483.28
606.53
654.78
543.78
667.03
715.28
511.28
634.53
682.78
571.78
695.03
743.28
535.28
658.53
706.78
595.78
719.03
767.28
227.68
245.93
245.93
288.18
306.43
306.43
251.68
269.93
269.93
312.18
330.43
330.43
227.68
245.93
245.93
288.18
306.43
306.43
251.68
269.93
269.93
312.18
330.43
330.43
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
119.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
171.76
—
—
—
—
—
—
195.56
213.81
213.81
256.06
274.31
274.31
—
—
—
—
—
—
195.56
213.81
213.81
256.06
274.31
274.31
273.29
396.54
444.79
333.79
457.04
505.29
297.29
420.54
468.79
357.79
481.04
529.29
273.29
396.54
444.79
333.79
457.04
505.29
297.29
420.54
468.79
357.79
481.04
529.29
Condenser Detail
UNIT
120 STANDARD EFFICIENCY
120 HIGH EFFICIENCY
120 STANDARD EFFICIENCY
130 STANDARD EFFICIENCY
130 HIGH EFFICIENCY
130 STANDARD EFFICIENCY
150 STANDARD EFFICIENCY
COND
COILS 2V
YES
—
YES
—
—
—
—
COND COIL
3V
—
YES
—
YES
YES
YES
YES
LOW
SOUND
NO
YES
YES
NO
YES
YES
YES
DIMENSION
“S”
96.62
102.06
102.06
96.62
102.06
102.06
102.06
Fig. 11 — 50N Unit Sizes R, S, T (120-150 Ton Nominal Capacity) (cont)
a48-8653
A MIN.
A/2
A=
Fig. 12 — Primary Drain Connection
7-in. (178 mm) min
Fig. 13 — Condensate Drain Piping Details (Slab
and Curb Mounted)
22
"J"
AUXILIARY COIL LOCATION
a50-8829
B
Auxiliary Coil Location — in.
UNIT
SIZES 50N (TONS)
N, P, Q (75-105)
R, S, T (120-150)
HEIGHT B
DISTANCE J
12.85
12.85
See dimenson J on certified
drawings, pages 20-23
Fig. 14 — Units with Optional Extended Chassis — Location of Coil Tracks
h. Place RTV or similar sealant on all of the 6 corners
to prevent water leaks.
i. Install hood assembly to unit using four screws on
each side and nine screws on the top.
j. Install filters (Item 6) to hood assembly.
6. Repeat Step 5 for each hood.
Step 9 — Install Outdoor Hoods — Unit sizes 75
to 105 nominal tons have three hoods on both sides. Unit sizes
120 to 150 nominal tons have four hoods on both sides. Figures
15-17 show units with three hoods. However, assembly of four
hoods for the larger units is the same. Instructions for unpacking and assembly of hoods are below.
1. For shipping, outdoor air hoods are packaged in a box located inside the unit.
2. Remove the box from the unit (see Fig.15).
a. Shipping support straps are bolted to the unit.
Remove four bolts on each, and discard straps.
b. Remove the hood supports (quantity 2 or 3 for
larger units) (see Fig. 16).
c. Remove packaging from the unit.
d. Reinstall hood supports (Fig. 16).
3. Remove filters located between return/exhaust fan and
economizer dampers, these are packaged separately from
hoods for shipping (see Fig. 15). Screws, other hardware
and seal strips are packaged with the outdoor hoods
(Fig. 15).
4. Apply seal strip to the unit. Strip should extend around
entire opening (see Fig. 17).
5. Assemble hoods (see Fig. 18).
a. Attach hood sides (Items 1 and 2) to the hood top
(Item 3). Fasten hood using six screws on each
side.
b. Attach hood support (Item 4) to hood top (Item 3).
c. Attach angle (Item 5) to hood sides (two per hood).
Fasten angle to the hood side using three screws
per side.
d. Attach hood support (Item 7) to top (Item 3) using
six screws.
e. Attach clips (Item 8) to hood support (Item 7).
f. Attach angle (Item 10) to hood support (Item 7)
using eight screws.
g. Attach angle (Item 9) to angle (Item 10) using two
pop rivets.
a48-8725
SHIPPING
SUPPORT
STRAPS
FILTERS
OUTDOOR
HOODS
(BOTH SIDES)
PACKAGING
Fig. 15 — Packaging Locations
Step 10 — Route Field Wiring — Field power wiring is brought into the unit through the back of the power box
near the bottom. Wiring can be brought through the roof curb
through field-supplied watertight connections. See Fig. 19.
There are two 35/8-in. holes for field power wiring in the
power box and a 7/8-in. hole in the side post for 24-v control
wiring provided. Field-supplied couplings must be used when
routing wiring into the control box.
See Fig. 19 for recommended disconnect location.
23
a48-8728
a48-8726
3
2
4
5
7
10
6
9
1
8
Fig. 18 — Hood Assembly
HOOD SUPPORTS
(BOTH SIDES)
Step 11 — Make Field Electrical Connections
IMPORTANT: All units have VFDs factory installed.
Units with VFDs (variable frequency drives) generate, use,
and can radiate radio frequency energy. If units are not
installed and used in accordance with these instructions,
they may cause radio interference. They have been tested
and found to comply with limits of a Class A computing
device as defined by FCC (Federal Communications Commission) regulations, Subpart J of Part 15, which are
designed to provide reasonable protection against such
interference when operated in a commercial environment.
Fig. 16 — Hood Supports
POWER WIRING — Units are factory wired for the voltage
shown on the unit nameplate. The main terminal block is suitable for use with copper wires only. Maximum wire size varies
according to disconnect size.
SEAL STRIP
DISCONNECT SIZE
250 Amps
400 Amps
600 Amps
QUANTITY...MAXIMUM WIRE SIZE
(MCM)
1...300
1...600
2...600
Units without Factory-Installed Disconnect — When installing units, provide a disconnect per NEC (National Electrical
Code) of adequate size (MOCP [maximum overcurrent protection] of unit is on the informative plate). All field wiring must
comply with NEC and all local codes. Size wire based on
MCA (minimum circuit amps) on the unit informative plate.
See Fig. 20 for power wiring connections to the unit power
terminal block and equipment ground. Maximum wire size is
two (2) 500 MCM (maximum wire size) conductors per pole.
Units with Factory-Installed Disconnect — The factoryinstalled disconnect is an interlocking, door-type. The disconnect handle locks the door when it is in the ON position. The
disconnect handle must be in the OFF position to open the control box door. The disconnect is located in the control box behind the control box door for all units. See Fig. 21.
All field wiring must comply with NEC and all local codes.
Wire must be sized based on MCA (minimum circuit amps) on
the unit informative plate. See Fig. 22 for power wiring connections to the unit disconnect and equipment ground.
SEAL STRIP
a48-8727
Fig. 17 — Seal Strips
24
RECOMMENDED
FIELD-SUPPLIED
DISCONNECT
LOCATION
a48-8729
CAUTION
Use care when drilling into corner post to avoid damage to condenser coil.
Fig. 19 — Disconnect Location
Determine maximum deviation from average voltage:
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent voltage imbalance:
Operating Voltage — Operating voltage to the unit must be
within the voltage range indicated on the unit nameplate. Voltages between phases must be balanced within 2%, and the current must be balanced within 10%. See Table 7 for motor limits.
Use the following formula to determine the percentage of
voltage imbalance.
Voltage Imbalance
= 100 x
% Voltage Imbalance = 100 x
max voltage deviation from average voltage
average voltage
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact local utility immediately.
Unit failure as a result of operation on improper line voltage
or excessive phase imbalance constitutes abuse and may cause
damage to electrical components.
455 + 464 + 455
3
=
1371
3
=
457
TB1
21
11
22
12
23
13
7
457
FACTORYINSTALLED
DISCONNECT
LOCATION
DISCONNECT PER NEC
FACTORY-INSTALLED
DISCONNECT
HANDLE LOCATION
a48-8730
EQUIP GND
EQUIP
GND
NEC
TB
LEGEND
— Equipment
— Ground
— National Electrical Code
— Terminal Block
a48-8466
Fig. 20 — Field Power Wiring Connections
Fig. 21 — Factory-Installed Disconnect Location
25
FACTORY
WIRE
22
23
21
DISCONNECT
PER NEC
13
12
EQUIP
GND
LEGEND
EQUIP — Equipment
GND — Ground
NEC
— National Electrical Code
11
FIELD
WIRE
Fig. 22 — Field Power Wiring Connections
for Factory-Installed Disconnect
Table 7 — Motor Limits
NOMINAL
HP
BkW
MAX BHP
MAX BkW
7.5
10
15
20
25
30
40
50
60
75
100
5.60
7.46
11.19
14.92
18.65
22.38
29.84
37.3
44.8
59.5
74.6
8.6
11.5
17.3
22.9
28.7
34.5
45.9
57.4
68.9
86.1
114.8
6.39
8.56
12.89
17.10
21.41
25.71
34.27
42.83
51.41
64.25
85.67
MAX AMPS (EA)
460 V
575 V
12.0
10.0
14.3
12.0
22.0
19.0
28.7
23.0
36.3
28.4
41.7
36.3
55.0
43.8
71.0
52.8
83.0
60.5
101.0
80.5
132.0
106.0
LEGEND
Bhp — Brake Horsepower
BkW — Brake Kilowatts
RATED
EFFICIENCY
91.7
91.7
93.0
93.6
93.6
94.1
94.1
94.5
95.0
95.0
95.4
NOTE:
Extensive motor and electrical testing on the Carrier units has
ensured that the full horsepower range of the motor can be utilized
with confidence. Using fan motors up to the horsepower ratings
shown in the Motor Limitations table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
26
Step 12 — Connect Air Pressure Tubing — Be-
adjusting BP control set points, refer to the Controls and
Troubleshooting book.
fore options such as the variable frequency drive (VFD) and/or
modulating power exhaust can operate properly, the pneumatic
tubing for pressure sensing must be installed. Use fire-retardant
plenum tubing (field-supplied). All control devices use 1/4-in.
tubing. Tubing must be run from the appropriate sensing location (in the duct or in the building space) to the control device
location in the unit.
VARIABLE FREQUENCY DRIVE — The tubing for the
duct pressure (DP) control option should sample supply duct
pressure approximately 2/3 of the way out from the unit in the
main trunk duct, at a location where a constant duct pressure is
desired.
On these units, the duct pressure is sensed by a pressure
transducer. The pressure transducer output is directed to the
unit control module. On all sizes, the DP transducer is located
in the unit control box. See Fig. 23 for ontrol box details. Use a
nominal 1/4-in. plastic tubing.
Refer to appropriate base unit Controls and Troubleshooting
book for instructions on adjusting set points for duct pressure
controls.
POWER EXHAUST — The tubing for the building pressure
(BP) control (achieved via the modulating power exhaust option) should sample building pressure in the area near the entrance lobby (or other appropriate and sensitive location) so
that location is controlled as closely to design pressures as
possible.
These units use a pressure transducer for sensing building
pressure. The BP transducer is located in the unit control box.
Use a nominal 1/4-in. plastic tubing.
For instructions on adjusting BP control set points, refer to
the Controls and Troubleshooting book.
RETURN FAN — The tubing for the building pressure
(BP) control (achieved via the return fan exhaust option)
should sample building pressure in the area near the entrance lobby (or other appropriate and sensitive location) so
that location is controlled as closely to design pressures as
possible.
The units use a pressure transducer for sensing building
pressure. The BP transducer is located in the unit control
box. Use a nominal 1/4-in. plastic tubing. For instructions on
Step 13 — Remove Supply-Fan Shipping
Bracket Screws — Supply-fan shipping bracket screws
must be removed from each corner of the fan sled before starting unit. See Fig. 24.
1. To remove shipping bracket screws, raise fan sled by
turning adjusting bolt counterclockwise until spring is
compressed slightly.
2. Remove screws holding shipping bracket to spring support.
NOTE: It is not necessary to remove the shipping bracket, only remove the screws.
3. After removing all shipping bracket screws, level fan sled
using the adjusting screws.
Step 14 — Remove Optional Power Exhaust
Shipping Bracket Screws — Optional power exhaust
shipping bracket screws must be removed from each corner of
the fan sled before starting unit.
1. To remove shipping bracket screws, raise fan sled by
turning adjusting bolt counterclockwise until spring is
compressed slightly.
2. Remove screws holding shipping bracket to spring support.
NOTE: It is not necessary to remove the shipping bracket, only remove the screws.
3. After removing all shipping bracket screws, level fan sled
using the adjusting screws.
Step 15 — Remove Optional Return-Fan Shipping Brackets — Optional return fan shipping brackets
must be removed from each corner of the fan sled before starting unit. See Fig. 25.
To remove shipping brackets, remove 2 screws holding
each bracket to the cross rail. There are 4 brackets per unit.
After removing all shipping brackets, level the fan using the
adjustment screws.
27
a48-8731
Fig. 23 — Control Box Component Arrangement
28
SPRING
SUPPORT
a48-8732
SHIPPING BRACKET
SCREWS (4) EACH SPRING
Fig. 24 — Supply Fan and Power Exhaust Fan Shipping Bracket Bolts
Step 16 — Install Supply-Air Thermistors —
Supply-air thermistors are a field-installed, factory-provided component. Three supply-air thermistors are shipped
with electric heat units equipped with optional SCR controlled electric heat inside the unit control box. Thermistor
wires must be connected to the SGC in the unit control box.
See Table 8. The supply-air thermistors should be located in
the supply duct with the following criteria:
• downstream of the heater elements
• equally spaced as far as possible from the heater
elements
• a duct location where none of the supply-air thermistors
are within sight of the heater elements
• a duct location with good mixed supply air
a48-8733
Step 17 — Install Unit Accessories — For applications requiring accessories, the following packages are
available:
All units:
• space temperature sensor
• CO2 sensor
• space temperature sensor with CO2 sensor
• airflow switch
• filter switch
• smoke detector
Refer to the individual accessory installation instructions in
each accessory package for information on installing accessories.
RETURN FAN SHIPPING
BRACKET BOLTS
Fig. 25 — Return Fan Shipping Bracket Bolts
29
Table 8 — SGC Thermistor Designations
THERMISTOR
PIN
CONNECTION
POINT
SAT1
J8 – 1,2 (SGC)
SAT2
J8 – 3,4 (SGC)
SAT3
J8 – 5,6 (SGC)
FUNCTION AND LOCATION
Thermistors
Supply-Air Thermistor (SAT) — Inserted into supply section
underneath the gas heat section (factory-provided,
field-installed)
Supply-Air Thermistor (SAT) — Inserted into supply section
underneath the gas heat section (factory-provided,
field-installed)
Supply-Air Thermistor (SAT) — Inserted into supply section
underneath the gas heat section (factory-provided,
field-installed)
PART NO.
HH79NZ033
SGC — Staged Gas Controller
Two-Piece Unit Fit Up
1. Locate and remove split parts package from return section of unit. Open package and remove split unit parts.
See Tables 9 and 10 for parts list.
2. Rig main unit section and return section separately.
3. Do not assemble main unit section and return section on
ground and attempt to lift. Unit pieces must be assembled on roof curb.
4. Insert base rail guides into the base rails of the main unit
section. Do not attach with screws yet. See Fig. 26 and
27.
5. Insert top rail guides into top rails of the main unit section. Do not attach with screws yet. See Fig. 26 and 28.
6. Rig and set the main unit section on the unit roof curb.
Align the unit bulkhead with the supply opening in the
roof curb.
7. Remove the roof cap, top cover and L brackets from the
filter end of the return section. Save these parts for later
installation. See Fig. 29 and 30.
8. Rig and set return section onto the roof curb using rail
guides as an alignment aid. The return section must be
within 2 in. of the main unit section. Slide base rail and
9.
10.
11.
12.
13.
14.
15.
16.
top rail guides from main unit section rails partially into
return section rails.
Install tar tape on edge of main unit base rails to seal base
rail splice. See Fig. 31.
Using ¾-in. x 30-in. threaded rod, nuts, washers and
backing plates provided, pull and secure the base rails together. See Fig. 32.
Attach (4) brackets to top rails. Using 3/8-in. x 6-in.
threaded rods, nuts, washers and backing plates provided,
pull the top rails together and secure with top rail guide
from Step 5. See Fig. 33. Remove threaded rods and
brackets after securing top rail guide.
Place seal strip along both sides of basepan joint. Attach
basepan covers to basepan joint. See Fig. 34.
Install L brackets, top cover and top cap joining main unit
section and return section top cover assemblies. See
Fig. 35 and 36.
Route wiring from main unit section to return section
components. Wires are labeled with return section component terminations. See Fig. 37 for wire routing. See
Fig. 38 for return section component locations.
Install side post on far side of unit. See Fig. 39.
Install side panels at main unit section/return section split.
Install panel side brackets, 2 on each panel. See Fig. 39.
Table 9 — 75-105 Nominal Ton Units Parts List
ITEM
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
21
28
31
33
40
COMPONENT NUMBER
48NG501939
48NG501935
48NG501937
AU02AB361
AT11AB361
48NG501938
AL48AM307
48NG501936
AU02AB242
AT39AB241
48NG501940
48NG501941
AL31AY308
AL79AU216
48NG401017
48NG401072
48NG501897
AA06BS168
AL56ZA003
99SR120216142001
48NG501629
PF0144
QUANTITY
2
2
8
4
6
4
12
2
4
4
1
1
34
2
1
2
3
40
42
2
2
3
COMPONENT NAME
RAIL,MOUNTING
ROD,THREADED
WASHER,PLATE
WASHER,FLAT
NUT,HEAVY HEX
BRACKET,TIE
SCREW,HEXHD SR
ROD,THREADED
WASHER,FLAT
NUT,HEX
PLATE,COVER
PLATE,COVER
SCREW
SCREW,HEXHD TF
POST ASSY,SIDE
PANEL ASSY,SIDE
BRACKET,PANEL
BOLT,HEXHD
SCREW
SEAL STRIP
PLATE
SEALER,PRESTITE
30
COMPONENT QUALIFIER
SPLIT,BASE,GUIDE
3/ -10 UNC 2A 30-in. L
4
3/ -in. LRT SPLIT
4
3 /4
3/ -10
4
LRT SPLIT TOP
1 /4 X 5 /8
3/ -16 UNC 2A 6" L
8
3/
8
3/8-16
SPLIT,BASEPAN
SPLIT,BASEPAN
#10 X 1/2
6-in. (075-105 T)
12-in. (075-105 T)
SKIN JOINT 075-105T
1/ X 0.75
4
1/4 AB-14 X 5/8-in. SERR.
JOIN SPLIT UNITS
2-in. WIDE ROLL
Table 10 — 120-150 Nominal Ton Units Parts List
ITEM
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
20
21
38
33
40
COMPONENT NUMBER
48NG501939
48NG501935
48NG501937
AU02AB361
AT11AB361
48NG501938
AL48AM307
48NG501936
AU02AB242
AT39AB241
48NG501940
48NG501941
AL31AY308
AL79AU216
48NG401018
48NG401070
48NG501896
48NG500998
AA06BS168
AL56ZA003
48NG501629
PF0144
QUANTITY
2
2
8
4
6
4
12
2
4
4
1
1
34
2
1
2
3
2
40
42
2
3
COMPONENT NAME
RAIL, MOUNTING
ROD, THREADED
WASHER, PLATE
WASHER, FLAT
NUT, HEAVY HEX
BRACKET, TIE
SCREW, HEXHD SR
ROD, THREADED
WASHER, FLAT
NUT, HEX
PLATE, COVER
PLATE, COVER
SCREW
SCREW, HEXHD TF
POST ASSY, SIDE
PANEL ASSY, SIDE
BRACKET, PANEL
HANDLE
BOLT, HEXHD
SCREW
PLATE
SEALER, PRESTITE
COMPONENT QUALIFIER
SPLIT,BASE,GUIDE
3/4-10 UNC 2A 30-in. L
3/ -in. LRT SPLIT
4
3/
4
3/4-10
LRT SPLIT TOP
1/ X 5/
4
8
3/8-16 UNC 2A 6-in. L
3/
8
3/ -16
8
SPLIT,BASEPAN
SPLIT,BASEPAN
#10 X 1/2
6-in. (120-150 T)
12-in. (120-150 T)
SKIN JOINT 120-150T
1/
X 0.75
X 5/8-in. SERR.
JOIN SPLIT UNITS
2-in. WIDE ROLL
4
1/4 AB-14
a50-8879
TOP RAIL
GUIDES
TOP RAIL
GUIDE
BASE RAIL
GUIDES
a50-8877
Fig. 28 — Top Rail Guide
Fig. 26 — Base and Top Rail Guide Locations
ROOF
CAP
TOP
COVER
a50-8880
a50-8878
Fig. 29 — Roof Cap and Top Cover Removal
BASE RAIL GUIDE
Fig. 27 — Base Rail Guide
31
L BRACKETS
a50-8884
Fig. 33 — Top Rail Brackets
a50-8881
a50-8885
Fig. 30 — L Bracket Removal
A50-8882
INSTALL TAR TAPE ON
ENTIRE BASE RAIL EDGE
BASEPAN JOINT/COVER
Fig. 31 — Tar Tape Location
Fig. 34 — Basepan Joint/Cover
L BRACKETS
a50-8883
A50-8886
Fig. 32 — Secure Base Rails
Fig. 35 — L Bracket Installation
32
TOP CAPS
TOP
COVER END CAPS
a50-8887
Fig. 36 — Main Unit and Return Section
Top Cover Assemblies
RUN WIRES THRU THIS
BUSHING FOR THE
FOLLOWING: PL28, PL29,
PL40, PL43 TO CONTROL
BOX
DETAIL A
SEE DETAIL A
RUN GROUND WIRE (GRN/YEL)
FROM JUNCTION BOX TO
CROSS RAIL FASTENER
Fig. 37 — Wire Routing
33
RUN WIRE THRU THIS
BUSHING FOR THE FOLLOWING:
PL31, PL45 TO CONTROL BOX
A50-8888
VFD WITH BYPASS
DETAIL NN
VFD WITHOUT BYPASS
SEE DETAIL NN
DETAIL NN
A50-8889
VFD DETAILS
Fig. 38 — Return Section Component Locations
CONTROLS INSTALLATION
SIDE POST
FAR SIDE ONLY
Constant Volume (CV) / Staged Air Volume
(SAV™) Units — The 50N units may be used in applications with additional control features, options, or accessories.
Refer to the appropriate accessory installation instructions for
more information on installing that accessory. Control options
and accessories available for CV/SAV units are:
• thermostats
• differential enthalpy sensor
• return air humidity sensor
• outdoor air humidity sensor
• relative humidity space sensor
• CO2 sensors
• fan status switch
• filter pressure transducer
• return smoke detector
• CEM (controls expansion module) module
• EXB (economizer control board) module
CONTROL WIRING — The unit can be controlled with a
Carrier-approved accessory electro-mechanical or electronic
thermostat that has two stages of cooling, two stages of heating
control, and an output for fan control. The thermostat may also
include time of day scheduling or use scheduling routines built
into the ComfortLink controls.
Install the thermostat according to the installation instructions shipped with the accessory thermostat. Locate thermostat
assembly on a solid interior wall to sense average temperature.
SIDE
PANEL
A50-8890
SIDE
PANEL
BRACKETS
Fig. 39 — Side Post and Panel Installation
34
terminals in the unit main control box. To connect the space
temperature sensor, see Fig. 41.
COMMUNICATING SPACE TEMPERATURE SENSOR
(T-58) — The communicating space temperature sensor (P/N
33ZCT58SPT) is wired to the Carrier Comfort Network®
(CCN) connections on TB202.
SPACE TEMPERATURE AVERAGING — Applications that
require averaging using multiple space temperature sensors can
be satisfied using either 4 or 9 sensors as shown in Fig. 42.
NOTE: Only Carrier sensors may be used for standard T-55
space averaging. Sensors must be used in multiples of 1, 4, and
9 only, with total sensors wiring not to exceed 1000 ft.
NOTE: Do not use T-56 sensors for space temperature averaging because the 5-degree offset function will not work in a
multiple sensor application.
HEAT INTERLOCK RELAY (VAV Units Only — Not Necessary for Digital Air Volume Applications) — Variable air volume (VAV) units using morning warm-up and/or occupied
heating require that room terminals be controlled to a position
that provides the minimum required heating cfm or greater
when the unit goes into Heating mode. The HIR (heat interlock
relay) function is provided for this control. When the unit goes
into Heating mode, the HIR is energized to provide switch closure or opening (depending on how the field-supplied power
source is set up) to open the room terminals. The field connections for the HIR are at TB201 terminals 9 and 10. See Fig. 43.
Route thermostat cable or equivalent leads of colored wire
from subbase terminals through conduit into the low voltage
connections in the main control box. For thermostat TB201
connections, see Fig. 40.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For over 75 ft, use
no. 14 AWG insulated wire (35 C minimum). All wire larger
than no. 18 AWG cannot be directly connected at the thermostat
and will require a junction box and splice at the thermostat.
FIELD SUPPLIED THERMOSTAT
a48-8735
RC
R
R
Y1
Y2
W1
W2
G
Y1
Y2
W1
W2
G
C
X
TB201
Fig. 40 — Field Control Thermostat Wiring
Variable Air Volume (VAV) Units — The 50N
units may be used in applications with additional control features, options, or accessories. Refer to the appropriate accessory installation instructions for more information on installing
that accessory. Refer to the Controls and Troubleshooting manual for more information concerning installation and configuration of options and accessories. Control options and accessories
available for VAV units are:
• thermostats
• differential enthalpy sensor
• return air humidity sensor
• outdoor air humidity sensor
• relative humidity space sensor
• CO2 sensors
• fan status switch
• filter pressure transducer
• return smoke detector
• CEM (controls expansion module) module
• EXB (economizer control board) module
VAV CONTROL WIRING — The recommended types of
control wiring are shown below:
MANUFACTURER
Alpha
American
Belden
Columbia
Manhattan
Quabik
Option and Accessory Control Wiring —
The
50N Series units may be used in applications with additional
control features, options, or accessories. Refer to the Controls
and Troubleshooting manual for more information concerning
installation and configuration of options and accessories.
Figures 43-53 contain wiring information on the following
features:
• heat interlock relay (Fig. 43)
• outdoor air enthalpy switch (Fig. 44)
• CO2 space sensor (Fig. 45)
• filter status switch (Fig. 46)
• fan status switch (Fig. 47)
• space humidity sensor (Fig. 48)
• return air humidity sensor (Fig. 48)
• return air CO2 sensor (Fig. 49)
• return air smoke detector (Fig. 50)
• smoke control — fire shutdown (Fig. 51)
• smoke control — purge (Fig. 52)
• smoke control — evacuation (Fig. 52)
• smoke control — pressurization (Fig. 52)
• CCN connections (Fig. 53)
PART NO.
Regular Wiring
Plenum Wiring
1895
—
A21451
A48301
8205
884421
D6451
—
M13402
M64430
6130
—
T55- SPT
SEN
SENSORS — Sensors should be wired using single twisted
pairs of 20 AWG (American Wire Gage) conductor cable rated
for the application, except for the T-56 accessory sensor which
requires 3-conductor cable.
HUMIDITY CONTROL AND HOT WATER AND
STEAM VALVES — These devices require 20 AWG twisted
pair conductor cables rated for the application for the 4 to
20 mA signal.
SPACE TEMPERATURE SENSOR (T-55) — The space temperature sensor (P/N 33ZCT55SPT), if used, is wired to terminals in the unit main control box. To connect the space temperature sensor, see Fig. 41.
SPACE TEMPERATURE SENSOR (T-56) — The space temperature sensor (P/N 33ZCT56SPT), if used, is wired to
JUMPER
TERMINALS
T56- SPT
SEN
SET
a48-8736
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
UNIT
TB201
T55
TB201
1
2
3
Fig. 41 — T-55 or T-56 Wiring
35
TB201
RED
1
T55
BLK
2
SENSOR 1
a48-8737
SENSOR 2
SENSOR 3
SENSOR 4
SPACE TEMPERATURE AVERAGING (4 SENSOR
APPLICATION)
TB201
1
T55
2
SENSOR 1
SENSOR 4
SENSOR 2
SENSOR 3
SENSOR 5
SENSOR 6
SENSOR 8
SENSOR 9
NOTE: Use T-55 sensor only.
SENSOR 7
SPACE TEMPERATURE AVERAGING (9 SENSOR
APPLICATION)
Fig. 42 — Space Temperature Averaging Wiring
13
RCB
J8
RELAY 5
14
10
15
9
a48-8477
Fig. 43 — Heat Interlock Relay Wiring
36
6
RCB
J4
FIELD INSTALLED (FIELD
SUPPLIED) JUMPER WHEN
ENTHALPY SWITCH NOT USED
5
a48-8478
Fig. 44 — Outdoor Air Enthalpy Switch Wiring
TB201
8
MBB
J8
7
a48-8479
Fig. 45 — CO2 Space Sensor Wiring
FILTER STATUS - RETURN SWITCH
GRA
1
180 OHM
2
BLK
AN 5
CEM
J5
FILTER PRESSURE RETURN
_
+
a48-8738
GRA
ORN
FILTER STATUS - POST FILTER
BLU
3
180 OHM
VIO
AN 6
CEM
J5
AN 7
CEM
J6
4
FILTER PRESSURE - POST FILTER
_
+
5
BLU
RED
6
Fig. 46 — Filter Status Wiring
37
a48-8741
RXB
J4
Fig. 47 — Fan Status Switch Wiring
a48-8740
TB203
AN7
1
RED
7
+
MIXED AIR HUMIDITY
4 - 20 ma
2
ORN
8
-
ACCSY
3
24VDC
AN8
4
5
PL29-1
RED
RED
PL29-2
BLK
BLK
+
OA HUMIDITY
4 - 20 ma
-
ACCSY
6
24VDC
AN9
CEM
J6
TB202
7
ORN
4
+
8
GRN
3
-
SPACE HUMIDITY
4 - 20 ma
ACCSY
9
24VDC
AN10
10
PL37-5
BLU
BLU
+
11
PL37-6
VIO
VIO
-
RETURN HUMIDITY
4 - 20 ma
12
Fig. 48 — Space and Return Air Humidity Sensor Wiring
38
ACCSY
RED
BRN
a48-8483
Fig. 49 — Return Air CO2 Sensor Wiring
PL45-1
TB201
1
a48-8739
PL45-2
2
PL45-3
PL45-6
PL45-5
PL45-4
Fig. 50 — Return Air Smoke Detector Wiring
FIRE SHUTDOWN
2
1
BLU
MBB
J6
WHT
TB201
a48-8485
Fig. 51 — Fire Shutdown Wiring
39
14
15
16
17
18
19
TB 202
a48-8486
RCB J4
Fig. 52 — Purge, Evacuation, and Pressurization Wiring
a48-8487
TB201
MBB
J5
Fig. 53 — CCN Connections
40
Carrier Comfort Network® (CCN) Interface —
2. Cut the CCN wire and strip the ends of the red (+), white
(common) and black (–) conductors. (If a different network color scheme is used, substitute appropriate colors.)
3. Wire the CCN to the screw terminals on the COMM
board as follows:
a. Secure the red (+) wire to CCN screw terminal +
on the COMM board.
b. Secure the white (common) wire to CCN screw
terminal C on the COMM board.
c. Secure the black (–) wire to CCN screw terminal –
on the COMM board.
d. Secure shield wire to CCN screw terminal
SHIELD on the COMM board.
The 50N Series units can be connected to the CCN system if
desired. The communication bus wiring is supplied and
installed in the field. It consists of shielded, 3-conductor cable
with shield wire.
The system elements are connected to the communication
bus in a daisy chain arrangement. The positive pin of each
system element communication connector must be wired to the
positive pins of the system element on either side of it, the
negative pins must be wired to the negative pins, and the signal
pins must be wired to common pins. Wiring connections for
the CCN system should be made at the terminal block using the
screw terminals. The board also contains an RJ14 CCN plug
that can be used to connect a field service computer. There is
also another RJ14 LEN (Local Equipment Network) connection that is used to download software or connect a Navigator™ device.
NOTE: Conductors and drain wire must be 20 AWG minimum
stranded, tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon*, or polyethylene.
An aluminum/polyester 100% foil shield and an outer jacket of
PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum
operating temperature range of –4 to 140 F (–20 C to 60 C) is
required. See Table 11 for cables that meet the requirements.
IMPORTANT: A shorted CCN bus cable will prevent
some routines from running and may prevent unit from
starting. If abnormal conditions occur, unplug the connector. If conditions return to normal, check CCN connector,
and run new cable if necessary. A short in one section of
the bus can cause problems with all system elements on
the bus.
Optional UPC Open Installation
WIRING THE UPC OPEN TO THE MS/TP NETWORK — The UPC Open controller communicates using
BACnet† on an MS/TP network segment communications at
9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps.
Wire the controllers on an MS/TP network segment in a daisy-chain configuration. Wire specifications for the cable are
22 AWG (American Wire Gage) or 24 AWG, low-capacitance,
twisted, stranded, shielded copper wire. The maximum length
is 2000 ft.
Install a BT485 terminator on the first and last controller on
a network segment to add bias and prevent signal distortions
due to echoing. See Fig. 54-56.
To wire the UPC Open controller to the BAS network:
1. Pull the screw terminal connector from the controller's
BAS Port.
2. Check the communications wiring for shorts and
grounds.
3. Connect the communications wiring to the BAS port’s
screw terminals labeled Net +, Net -, and Shield.
NOTE: Use the same polarity throughout the network
segment.
4. Insert the power screw terminal connector into the UPC
Open controller's power terminals if they are not currently connected.
5. Verify communication with the network by viewing a
module status report. To perform a module status report
using the BACview keypad/display unit, press and hold
the “FN” key then press the “.” Key.
To install a BT485 terminator, push the BT485 on to the
BT485 connector located near the BACnet connector.
NOTE: The BT485 terminator has no polarity associated with
it.
To order a BT485 terminator, consult Commercial Products
i-Vu® Open Control System Master Prices.
Table 11 — CCN Connection Approved
Shielded Cables
MANUFACTURER
Alpha
American
Belden
Columbia
CABLE PART NO.
2413 or 5463
A22503
8772
02525
IMPORTANT: When connecting the CCN communication bus to a system element, use a color coding system for
the entire network to simplify installation and checkout.
The following color code is recommended:
SIGNAL
TYPE
+
COMMON
–
CCN BUS CONDUCTOR
INSULATION COLOR
RED
WHITE
BLACK
COMM1 PLUG
PIN NO.
1
2
3
NOTE: If a cable with a different color scheme is selected, a
similar color code should be adopted for the entire network.
At each system element, the shields of its communication
bus cables must be tied together. If the communication bus is
entirely within one building, the resulting continuous field
must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another,
the shields must be connected to grounds at the lightning
suppressor in each building where the cable enters or exits the
building (one point per building only).
To connect the unit to the network (Fig. 53):
1. Turn off power to the control box.
* Registered tradepoint of DuPont.
† Sponsored by ASHRAE (American Society of Heating, Refrigerating
and Air-Conditioning Engineers).
41
BT485
TERMINATOR
BACNET
CONNECTION
POWER LED
Tx1 LED
Rx1 LED
Tx2 LED
Rx2 LED
23
45
01
8
67 9
01
8
67 9
23
45
BACNET
BAUD RATE
DIP SWITCHES
ADDRESS
ROTARY
SWITCHES
RUN LED
ERROR LED
Fig. 54 — UPC Open Controller
economizer is required for this function. Pressurization is accomplished by the following:
• opening the economizer (option)
• running the supply fan (optional inlet guide vanes open
or optional VFD at normal duct static pressure set point)
• closing the power exhaust dampers (if installed as option
or accessory)
• shutting off the power exhaust fans (if installed as option
or accessory)
This allows the space to be over pressurized relative to adjacent zones and prevents or slows entry of smoke into this space
from adjacent zones. See Fig. 52 for wiring.
EVACUATION — Evacuation mode removes smoke or undesirable air from interior spaces without reintroducing unsuitable air. The factory-installed optional economizer with option/
accessory power exhaust is required for this function. Evacuation is accomplished by the following:
• turning the supply fan off
• opening the economizer (option required)
• running the exhaust fans (option or accessory required)
• opening the exhaust dampers
See Fig. 52 for wiring.
MS/TP WIRING RECOMMENDATIONS — Recommendations are shown in Tables 12 and 13. The wire jacket and UL
temperature rating specifications list two acceptable alternatives. The Halar specification has a higher temperature rating
and a tougher outer jacket than the SmokeGard specification,
and it is appropriate for use in applications where the user is
concerned about abrasion. The Halar jacket is also less likely to
crack in extremely low temperatures.
NOTE: Use the specified type of wire and cable for maximum
signal integrity.
Smoke Control Modes — Rooftop units can be used
for aid in building smoke control in the event of a building fire.
The available functions include: Fire Shutdown, Pressurization, Evacuation, and Smoke Purge. These functions are
enhanced when multiple rooftop units are used to zone a building. See Table 14 and Fig. 51 and 52.
FIRE SHUTDOWN — Fire Shutdown mode terminates all
unit operation (cooling, heating, supply fan, and power
exhaust). This mode prevents recirculation of contaminated air
back into the space. The mode will not allow admission into
the space of unsuitable outside air. See Fig. 51 for wiring.
PRESSURIZATION — Pressurization mode is intended to
keep smoke out of a zone. The factory-installed optional
42
Table 12 — MS/TP Wiring Recommendations
SPECIFICATION
Cable
Conductor
Insulation
Color Code
Twist Lay
Shielding
Jacket
DC Resistance
Capacitance
Characteristic Impedance
Weight
UL Temperature Rating
Voltage
Listing
AWG
CL2P
DC
FEP
NEC
O.D.
TC
UL
—
—
—
—
—
—
—
—
RECOMMMENDATION
Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable
22 or 24 AWG stranded copper (tin plated)
Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) O.D.
Black/White
2 in. (50.8 mm) lay on pair 6 twists/foot (20 twists/meter) nominal
Aluminum/Mylar shield with 24 AWG TC drain wire
SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) O.D.
Halar Jacket (E-CTFE) 0.010 in. (0.254 mm) wall 0.144 in. (3.6576 mm) O.D.
15.2 Ohms/1000 feet (50 Ohms/km) nominal
12.5 pF/ft (41 pF/meter) nominal conductor to conductor
100 Ohms nominal
12 lb/1000 feet (17.9 kg/km)
SmokeGard 167°F (75°C)
Halar -40 to 302°F (-40 to 150°C)
300 Vac, power limited
UL: NEC CL2P, or better
LEGEND
American Wire Gage
Class 2 Plenum Cable
Direct Current
Fluorinated Ethylene Polymer
National Electrical Code
Outside Diameter
Tinned Copper
Underwriters Laboratories
Table 13 — Open System Wiring Specifications and Recommended Vendors
WIRING SPECIFICATIONS
Wire Type
RECOMMENDED VENDORS AND PART NUMBERS
Contractors
Connect Air
Belden RMCORP
Wire and Cable
International
Description
22 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide for
specifications.
MS/TP
Network (RS-485) 24 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide
for specifications.
Rnet
4 conductor, unshielded, CMP, 18 AWG, plenum rated.
AWG
CL2P
CMP
FEP
TC
—
—
—
—
—
W221P-22227
—
25160PV
CLP0520LC
W241P-2000F
82841
25120-OR
—
W184C-2099BLB
6302UE
21450
CLP0442
LEGEND
American Wire Gage
Class 2 Plenum Cable
Communications Plenum Rated
Fluorinated Ethylene Polymer
Tinned Copper
Fig. 55 — Open System Network Wiring
43
Fig. 56 — BT485 Installation
SMOKE PURGE — Smoke Purge mode removes smoke from
the interior spaces and replaces it with fresh outside air. The factory-installed optional economizer with option/
accessory
power exhaust are required for this function. Smoke purge is accomplished by the following:
• turning supply fan on
• opening the economizer (option required)
• running the exhaust fans (option or accessory required)
• opening the exhaust dampers
See Fig. 52 for wiring.
SMOKE CONTROL INSTALLATION — Implementation of
the various smoke control modes on these units requires the installer to modify the unit wiring to add contacts (via either manual switches or relays) that will selectively interrupt and override
standard factory control sequences. See Table 14 and Fig. 51 and
52 for more information.
Table 14 — Smoke Control Modes
FUNCTION
Supply Fan
VFD†
Economizer
Return Air
Damper
Exhaust
Fans
Exhaust
Damper
Fire
Shutdown
Off
—
Closed
MODE
Pressur- Evacuation*
ization
On
Off
Open/On
—
Open
Open
Smoke
Purge*
On
Open/On
Open
Open
Closed
Closed
Closed
Off
Off
On
On
Closed
Closed
Open
Open
LEGEND
VAV — Variable Air Volume
VFD — Variable Frequency Drive
*Power exhaust option required for this mode.
†Applicable to VAV units with appropriate options.
© Carrier Corporation 2013
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500114-01
Printed in U.S.A.
Form 50N-1SI
Pg 44
10-13
Replaces: NEW