CARRIER Package Units(both Units Combined) Manual L0502457
User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides
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Page Count: 56
50HJ020-028
Single Package Rooftop Units
Electric Cooling with Electric Heat Option
Installation Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ...................... 1
INSTALLATION ................................ 2-25
Step 1 -- Provide Unit Support ................... 2
•ROOF CURB
•ALTERNATE UNIT SUPPORT
• SLAB MOUNT
Step 2 -- Remove Shipping Rails ................ 2
Step 3 -- Rig and Place Unit ..................... 2
• POSITIONING
• ROOF MOUNT
• INSTALLATION ONTO CURB
Step 4 -- Field Fabricate Ductwork ............... 9
Step 5 -- Make Unit Duct Connections ........... 9
• VERTICAL CONFIGURATION
• HORIZONTAL APPLICATIONS
Step 6 --Trap Condensate Drain ................ 10
Step 7- Make Electrical Connections .......... 10
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Step 8 -- Install Outdoor-Air Hood .............. 23
• MANUAL DAMPER ASSEMBLY
Step 9 -- Position Optional Power Exhaust
or Barometric Relief Damper Hood ............ 25
Step 10- Non-Fused Disconnect ............... 25
Step 11 -- Install All Accessories ............... 25
PRE-START-UP .................................. 26
START-UP .................................... 26-43
Unit Preparation ................................. 26
Compressor Mounting .......................... 26
Refrigerant Service Ports ....................... 26
Crankcase Heaters .............................. 26
Compressor Phasing ............................ 26
Internal Wiring .................................. 26
Evaporator Fan .................................. 26
Condenser Fans and Motors .................... 26
Return-Air Filters ................................ 26
Outdoor-Air Inlet Screens ....................... 26
Optional EconoMiSer IV ......................... 37
Operating Sequence ............................ 42
SERVICE ..................................... 43-49
Cleaning ........................................ 43
Lubrication ...................................... 43
Evaporator Fan Service and Replacement ....... 43
Page
Evaporator Fan Performance Adjustment ....... 44
Belt Tension Adjustment ........................ 44
Condenser Fan Adjustment ..................... 45
Power Failure ................................... 45
Refrigerant Charge .............................. 45
Filter Drier ...................................... 45
Protective Devices .............................. 45
Relief Devices ................................... 46
Control Circuit, 24-v ............................. 46
Replacement Parts .............................. 46
TROUBLESHOOTING ........................ 50-53
Unit Troubleshooting ............................ 50
EconoMiSer IV Troubleshooting ................. 51
START-UP CHECKLIST ........................ CL-I
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform the basic maintenance
functions of replacing filtel:s. All other operations should
be perforated by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
IIMPORTANT: Units have high mnbient temperature I
operating limits. If limits are exceeded, the units will I
automatically lock the complessor out of operation.
Manu;d reset will be required to restart the compressor
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500013-01 Printed in U.S,A, Form 50HJ-30SI Pg 1 10-05 Replaces: 50HJ-26SI
INSTALLATION
Step 1 -- Provide Unit Support
ROOF CURB -- Assemble or install accessory roof curb in
accor&mce with instructions shipped with this accessory. See
Fig. 1. Install insulation, cant strips, roofing, and counter flash-
ing as shown. Ductwork can be installed to roof curb before
unit is set in place. Ductwork must be attached to curb and not
to unit. Curb must be level. This is necessary to permit unit
diain to function properly. Unit leveling tolerance is _+J/m(_in.
per linear fl in any direction. Refer to Accessory Roof Curb
Installation Instructions for additional information as required.
When accessory roof curb is used, unit may be installed on
class A, B, or C roof covering matetial. Carrier roof curb acces-
soties are for flat roofs or slab mounting.
IMPORTANT: The gasketing of the unit to the roof curb
is ctitic_d for a watertight seal. Install gasket with the
roof curb as shown in Fig. 1. Improperly applied gasket
can _dso result in air leaks and poor unit performance.
Do not slide unit to position on roof curb.
ALTERNATE UNIT SUPPORT- When a curb cannot be
used, install unit on a noncombustible surface. Support unit
with sleepel_, using unit curb support area. If sleepers cannot
be used, support long sides of unit with a minimum of 3 equ_d-
ly spaced 4-in. x 4-in. pads on each side.
SLAB MOUNT (Horizontal Units Only) -- Provide a level
concrete slab that extends a minimum of 6 in. beyond unit cab-
inet. Install a gravel apron in front of condenser coil air inlet to
plevent gross and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
Step 2 -- Remove Shipping Rails -- Remove ship-
ping rails ptior to loweting unit onto roof curb. See Fig. 2. The
rails are attached to the unit at both the return end and condens-
er end. Remove the screws from both ends of each rail. Be
cmeful not to drop the rails onto any surface that could be &im-
aged. Discard the mils. It is important to replace the screws into
the unit to avoid any tfir or water leakage.
Do not allow the shipping rail to drop on the roof surface.
Dmnage to the roof surface may result.
Step 3 -- Rig and Place Unit -- Inspect unit for trans-
pollation &image. See Tables 1-3 for physical data. File any
claim with transportation agency.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck. Damage to unit can
result.
Do not &op unit; keep uptight. Use spreader bm_ over unit
to prevent sling or cable damage. Rollers may be used to move
unit across a roof. Level by using unit frmne as a leference;
leveling tolerance is _+1/1(_in. per linetu ft in any direction. See
Fig. 3 for additional information. Unit rigging weight is shown
in Fig. 3.
Four lifting holes me provided in the unit base mils as
shown in Fig. 3. Refer to rigging instructions on unit.
POSITIONING -- Maintain clearance, per Fig. 4, around and
above unit to provide minimum distance from combustible
matetials, proper airflow, and service access.
Do not install unit in an indoor location. Do not locate air
inlets nero exhaust vents or other sources of contaminated all:
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
ROOF MOUNT -- Check building codes for weight distribu-
tion requirements. Unit operating weight is shown in Table 1.
INSTALLATION ONTO CURB -- The 50HJ units are
designed to fit on the accessory full perimeter curb. Correct
placement of the unit onto the curb is ctitical to operating per-
formance. To aid in correct positioning, 3/_-in. diameter locat-
ing holes have been added to the unit base rails. When placing
the unit, these holes should line up with the roof curb edge as
shown in Fig. 5 and 6, to assure proper duct opening align-
ment. For placement on the curb, use the alignment holes
located approximately 2-in. from the end of the base rail on the
return end of the unit. See labels on the side of the unit for
more details.
Do not slide unit to position it when it is sitting on the curb.
Curb gasketing matetial may be &imaged and leaks may
result.
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SHIPPING RAIL_
Fig. 2 -- Shipping Rail Removal
CAUTION-NOTICETO RIGGERS:
AM. PAriS MUSTBE IN PLACE_ RIGGING.
NOTICETO RIGGB_S: Rig by bserti_ hooks ilto unit base rails as shown. Ma_ltain a distance of
120 inches (3048 _from top of unit to eyehoolL Leave con cover attached to ur(t _dgg_g to
protect con of urit from damage.
50HJ MAX CENTER OF GRAVITY (in.)
UNIT WEIGHT
SIZE (Ib) X Y Z
020 3358 63.9 34.0 30.5
024 3380 63.9 34.5 30.5
028 3769 67.8 35.0 35.0
NOTES:
1. Add 150 Ib (68 kg) for domestic crating.
2. See label for unit location on roof curb.
10'-0 o
(3048 MM)
Fig. 3 -- Rigging Details
8
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Table 1 -- Physical Data
020 024 028
18 20 25
2139 2187 2446
3 3 2
3 3 2
68._68._90 90...90...90 110...110...N/A
TXV TXV TXV
13.1 13.8 21.8
12.7 13.9 20.3
15.2 15.5 N/A
14,000 14,000 21,000
4...22 4...22 6...22
1/4_.1100 1/4...1100 1/4_.1100
1400 1400 2100
2...17 2...17 2...17
57.78 57.78 66.67
2._15xl 1 2_.15xl 1 2...15xl 1
Belt Belt Belt
7000 8000 10,000
Ball Ball Ball
1400 1400 1400
3...15 4...15 4...15
23.33 23.33 27.22
426 426 426
320 320 320
3._20x25 3...20x25 3._20x25
9... 16x25 9... 16x25 9... 18x24
UNIT 50HJ
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (Ib)
AI/AI*
COMPRESSOR
Quantity
Number of Refrigerant Circuits
Oil (ounces) Ckt A...Ckt B...Ckt C
REFRIGERANT TYPE
Expansion Device
Operating Charge (Ib)
Circuit A
Circuit B
Circuit C
CONDENSER FAN
Nominal Cfm (Total, all fans)
Quantity...Diameter (in.)
Motor Hp...Rpm
Watts Input (Total)
CONDENSER COIL
Rows... Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size
Type Drive
Nominal Cfm
Motor Bearing Type
Maximum Allowable Fan Rpm
EVAPORATOR COIL
Rows... Fins/in.
Total Face Area (sq ft)
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)
LEGEND
N/A -- Not Applicable
TXV -- Thermostatic Expansion Valve
*Aluminum evaporator coil and aluminum condenser coil.
Table 2 -- Fan Motor and Drive Data -- Vertical Supply/Return
50HJ
LOW RANGE
Motor Hp
Drive Motor Nominal Rpm
Drive Maximum Continuous Bhp
Drive Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
208/230
and 460 v
O2O
575 v
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
O24
208/230
and 460 v
3.7
1725
4.25
3698
56HZ
7/8
685-939
2.7
3.7
6.8
1.1875
Fixed
575 v
5
1745
5.75
4900
184T
11/8
751-954
3.7
4.7
8.6
1.1875
Fixed
O28
208/230
and 460 v
5
1745
5.75
4900
S 184T
1%
687-873
3.7
4.7
9.4
1.1875
Fixed
Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn - Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed Setting (rpm)
MID-LOW RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn - Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed Setting (rpm)
MID-HIGH RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn -Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed Setting (rpm)
HIGH RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn - Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed Setting (rpm)
N/A
N/A
N/A
N/A
N/A
3.7
1725
4.25
3698
56HZ
7/8
647-886
2.7
3.7
7.2
1.1875
Fixed
11.293-13.544
1...BX...38
40
6
767
5
1745
5.75
4900
S184T
11&
897-1139
3.7
4.7
7.2
1.1875
Fixed
9,81-13.055
1...BX...38
40
6
1018
7.5
1745
8.63
7267
$213T
13/8
1078-1274
5.5
6.5
8.9
1.1875
Fixed
9.025-12.179
1...BX...42
33
6
1176
3
1725
3.45
3149
56HZ
7/8
810-1072
3.1
4.1
6.6
1.1875
Fixed
11,286-14,475
1...BX...38
44
6
941
5
1745
5.75
4900
184T
11/8
873-1108
3.7
4.7
7.4
1.1875
Fixed
9.81-13.055
1...BX...36
39
6
991
7.5
1745
8.63
7267
$213T
13/8
1078-1274
5.5
6.5
8.9
1.1875
Fixed
9.025-12.179
1...BX...42
33
6
1176
N/A 11.293-13.544
N/A 1...BX...38
N/A 42
N/A 6
N/A 812
5
1745
5.75
4900
S 184T
11/8
949-1206
3.7
4.7
6.8
1.1875
Fixed
9,81-13.055
1...BX...38
43
6
1078
7.5
1745
8.63
7267
$213T
13/8
941-1176
4.8
6.0
8.9
1.1875
Fixed
9.025-12.179
1...BX...42
39
6
1059
10
1745
11.5
9582
$215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12.179
2...BX...38
47
6
1156
9.81-13.055
1...BX...40 9.81-13.055
1...BX...41
34 31
6 6
853 780
5 5
1745 1745
5.75 5.75
4900 4900
184T S184T
11/8 11_
949-1206 805-1007
3.7 4.8
4.7 6.0
6.8 10.4
1.1875 1.1875
Fixed Fixed
9.81-13.055
1...BX...45
9.81-13.055
1...BX...38
43 34
6 6
1078 906
7.5 7.5
1745 1745
8.63 8.63
7267 7267
S213T S213T
13/8 13/8
941-1176 941-1176
4.8 4.8
6.0 6.0
8.9 8.9
1.1875 1.1875
Fixed Fixed
9.025-12.179
1...BX...42
39
6
1059
10
1745
11.5
9582
$215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12,179
2...BX...38
47
6
1156
9.025-12.179
1...BX...42
39
6
1059
LEGEND
Bhp -- Brake Horsepower
N/A -- Not Applicable
10
1745
11.5
9582
S215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12.179
2...BX...38
47
6
1156
575 v
5
1745
5.75
4900
184T
11/8
687-873
3.7
4.7
9.4
1.1875
Fixed
9,81-13,055
1...BX...41
31
6
780
5
1745
5.75
4900
184T
11/8
805-1007
4.8
6.0
10.4
1.1875
Fixed
9,81-13,055
1...BX...45
34
6
906
7.5
1745
8.63
7267
S213T
1_8
941-1176
4.8
6.0
8.9
1.1875
Fixed
9.025-12,179
1...BX...42
39
6
1059
lO
1745
11.5
9582
$215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12,179
2...BX...38
47
6
1156
Table 3 -- Fan Motor and Drive Data -- Horizontal Supply/Return
50HJ
LOW RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Drive Pulley Center Line Distance (in.)
Drive Belt, Quantity...Type...Length (in.)
Drive Speed Change per Turn - Moveable Pulley (rpm)
Drive Moveable Pulley Maximum Full Turns
Drive Factory Speed Setting (rpm)
MID-LOW RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn - Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed setting (rpm)
MID-HIGH RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
208/230
and 460 v
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3.7
1725
4.25
3698
56HZ
7/8
647-886
2.7
3.7
7.2
1,1875
Fixed
11.293-13.544
1...BX,,.38
40
6
767
5
1745
5.75
4900
$184T
1%
Fan Rpm Range 897-1
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Drive Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn - Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed Setting (rpm)
HIGH RANGE
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Maximum Continuous Watts
Motor Frame Size
Motor Shaft Diameter (in.)
Fan Rpm Range
Motor Pulley Min. Pitch Diameter (in.)
Motor Pulley Max. Pitch Diameter (in.)
Blower Pulley Pitch Diameter (in.)
Blower Pulley Shaft Diameter (in.)
Blower Pulley Type
Pulley Center Line Distance (in.)
Belt, Quantity...Type...Length (in.)
Speed Change per Turn - Moveable Pulley (rpm)
Moveable Pulley Maximum Full Turns
Factory Speed Setting (rpm)
139
3.7
4.7
7.2
1.1875
Fixed
9.81-13.055
1...BX...38
4O
6
1018
7.5
1745
8.63
7267
S213T
13/8
1078-1274
5.5
6.5
8.9
1.1875
Fixed
9.025-12,179
1...BX...42
33
6
1176
020
575 v
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3
1725
3.45
3149
56HZ
7/8
810-1072
3.1
4.1
6,6
1.1875
Fixed
11,286-14.475
1...BX...38
44
6
941
5
1745
5.75
4900
184T
11/8
873-1108
3.7
4.7
7.4
1.1875
Fixed
9.81-13.055
1...BX...38
39
6
991
7.5
1745
8.63
7267
S213T
13/8
1078-1274
5.5
6.5
8.9
1.1875
Fixed
9.025-12.179
1...BX...42
33
6
1176
024
208/230
and 460 v
3.7
1725
4.25
3698
56HZ
7/8
685-939
2.7
3.7
6.8
1.1875
Fixed
1.293-13.544
1...BX...38
42
6
812
5
1745
5.75
4900
S184T
11/8
949-1206
3.7
4.7
6.8
1.1875
Fixed
9.81-13.055
1...BX,,.38
43
6
1078
7.5
1745
8.63
7267
$213T
13/8
941 - 1176
4.8
6.0
8.9
1.1875
Fixed
9.025-12.179
1...BX...42
39
6
1059
lO
1745
11.5
9582
$215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12,179
2...BX...38
47
6
1156
575 v
5
1745
5.75
4900
184T
11/8
751-954
3.7
4.7
8.6
1.1875
Fixed
9,81-13,055
1...BX...4O
34
6
853
5
1745
5.75
4900
184T
11/8
949-1206
3.7
4.7
6.8
1.1875
Fixed
9,81-13,055
1._BX_.38
43
6
1078
7.5
1745
8.63
7267
S213T
13/8
941-1176
4.8
6.0
8.9
1.1875
Fixed
9.025-12,179
1...BX...42
39
6
1059
10
1745
11.5
9582
$215T
1_8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12.179
2...BX...38
47
6
1156
LEGEND
Bhp -- Brake Horsepower
N/A -- Not Applicable
028
208/230
and 460 v
5
1745
5.75
4900
S 184T
11/8
687-873
3.7
4.7
9.4
1.1875
Fixed
9,81-13,055
1...BX...41
31
6
780
5
1745
5.75
4900
S 184T
11/8
805-1007
4.8
6.0
10.4
1.1875
Fixed
9,81-13,055
1...BX...45
34
6
906
7.5
1745
8.63
7267
S213T
1_8
941-1176
4.8
6.0
8.9
1.1875
Fixed
9.025-12.17£
1...BX...42
39
6
1059
lO
1745
11.5
9582
S215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12.17£
2...BX...38
47
6
1158
575 v
5
1745
5.75
4900
184T
11/8
687-873
3.7
4.7
9.4
1.1875
Fixed
9.81-13,055
1...BX,..41
31
6
780
5
1745
5.75
4900
184T
11/8
805-1007
4.8
6.0
10.4
1.1875
Fixed
9.81-13,055
1...BX...45
34
6
906
7.5
1745
8.63
7267
$213T
13/8
941-1176
4.8
6.0
8.9
1.1875
Fixed
9.025-12,179
1...BX...42
39
6
1059
10
1745
11.5
9582
S215T
13/8
1014-1297
4.3
5.5
7.4
1.1875
Fixed
9.025-12,179
2...BX...38
47
6
1156
ALIGNMENT
HOLE
(IN BASE RAIL)\
q ALIGNMENT
HOLE SHOULD
LINE UP WITH
ROOF CURB
EDGE FLANGE
EDGE FLANGE f
Fig. 5 -- Alignment Hole Details
RETURN SUPPLY
OPENING OPENING
CURB CURB
RETURN SUPPL
ALIGNMENT OPENING OPENINg.-
HOLES FOR _"--...._ _
CURB-BOTH
SIDES ROOF CURB
Fig. 6 -- Alignment Hole Location
Step 4 -- Field Fabricate Ductwork -- On vertical
units, secure all ducts to roof curb and building structure. Do
not connect ducm'ork to unit. For horizontal applications, field-
supplied flanges should be attached to horizontal dischalge
openings and all ductwork secured to the flanges. Insulate and
weatherproof all external ductwork, joints, and roof openings
with counter flashing and mastic in accordance with applicable
codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor baniel:
If a plenum return is used on a vertictd unit, the return
should be ducted through the roof deck to comply with applica-
ble fire codes.
A minimum clearance is not required around ductwork.
Cabinet leturn-air static plessure (a negative condition) shall
not exceed 0.35 in. wg with economizer or 0.45 in. wg without
economizer
These units are designed for a minimum continuous return-
air temperature in heating of 50 F (dry bulb), or an intermittent
operation down to 45 F (di'y bulb), such as when used with a
night set-back thermostat.
To operate fit lower return-air temperatures, a field-supplied
outdoor-air temperature control must be used to initiate both
stages of heat when the temperature is below 45 K Indoor com-
fort may be compromised when these lower air temperatures
are used with insufficient heating temperature rise.
Step 5 -- Make Unit Duct Connections
VERTICAL CONFIGURATION -- Unit is shipped for thru-
the-bottom duct connections. DuctwoN openings are shown in
Fig. 1 and 4. Duct connections for vertical supply and return
configuration are shown in Fig. 7. Field-fabricated concentric
ductwork may be connected as shown in Fig. 8 and 9. The unit
is designed to attach the ductwork to the roof curb. Do not
attach duct directly to the unit.
For vertical supply and return units, tools or pmls could
diop into ductwork and cause an injury. Install a 90-degree
turn in the return ductwork between the unit and the condi-
tioned space. If a 90-degree elbow cannot be installed, then
a grille of sufficient strength and density should be installed
to prevent objects from ftdling into the conditioned space.
Units with electric heat require a 1-in. clearance for the first
24 in. of ductwork. Outlet grilles must not lie directly below
unit discharge.
NOTE: A 90-deglee elbow must be provided in the supply
ductwork to comply with UL (Underwriters' Laboratories)
codes for use with electric heat.
HORIZONTAL APPLICATIONS -- Horizontal units are
shipped with outer panels that tdlow for side by side horizontal
duct connections. If specified during ordering, the unit will be
shipped with the vertical duct openings blocked off from the
factoq, ready for side supply installation. If the horizontal
option was not specified fit time of ordering the unit, a field-
installed accessory kit is required to convert the vertical unit
into a horizontal supply configuration.
Installation of the duct block-off covers should be complet-
ed prior to placing the unit unless sufficient side clem'ance is
available. A minimum of 66 in. is required between the unit
and any obstruction to install the duct block-off covers.
ECONOMIZER
SEE
NOTE
AIR .......
,N @ A,R
OUT
NOTE: Do not drill in this area; damage to basepan may result in water leak.
Fig. 7 -- Air Distribution --
Vertical Supply and Return
ECONOMIZER
SEE ;EE
NOTE
AIR OUT AIR IN AIR OUT
NOTE: Do not drill in this area; damage to basepan may result in water leak.
Fig. 8 -- Air Distribution -- Concentric Duct
BAFFLE
NOTE: Dimensions A, A', B, and B' are obtained from field-supplied ceiling
diffuser.
Shaded areas indicate block-off pans.
Fig. 9 -- Concentric Duct Details
Side supply duct dimensions and locations are shown on Fig. 4.
Connect ductwork to horizontal duct flange connections on
side of unit.
Step 6 -- Trap Condensate Drain -- See Fig. 10
for drain location. One 3/4-in. half coupling is provided outside
unit evaporator section for condensate diain connection. A trap
at least 4-in. deep must be used. See Fig. 11.
All units must have an external trap for condensate diain-
age. Install a trap at least 4 in. deep and protect against freeze-
up. If drain line is installed downstrealn from the external trap,
pitch the line away from the unit at 1 in. per 10 ft of run. Do not
use a pipe size smaller than the unit connection.
Step 7 -- Make Electrical Connections
F[ELD POWER SUPPLY -- Unit is factory wired for volt-
age shown on unit nalneplate. Be sure to check for correct
voltage.
When inst_flling units, provide disconnect per NEC (Nation-
al Electrical Code) of adequate size (MOCP [Maximum
Overcurrent protectionl of unit is on the informative plate). See
Tables 4A and 4B. All field wiring must comply with NEC and
local codes. Size wire based on MCA (Minimum Circuit
Amps) on the unit informative plate. See Fig. 12 for power
wiring connections to the unit power termimd block and
equipment grounds.
Route power and ground lines through control box end pan-
el or unit basepan (see Fig. 4) to connections as shown on unit
wiring diagram and Fig. 12.
Field wiring must conform to temperature limitations for
type "T" wire. All field wiring must comply with NEC and
local requirements.
Operating voltage to compressor must be within voltage
range indicated on unit nameplate. On 3-phase units, voltages
between phases must be balanced within 2%.
Unit failure as a result of operation on improper line voltage
or excessive phase imbalance constitutes abuse and may cause
damage to electrical components.
FIELD CONTROL WIRING -- Unit c_m be controlled with
a C_uTier-approved accessory thermostat. Install therlnostat
according to the installation instructions included with accesso-
ry. Locate thennostat assembly on a solid interior w_dl in the
conditioned space to sense average temperature.
Route thermostat cable or equivalent single leads of colored
wire from subbase terminals through conduit into unit to low-
voltage connections as shown on unit label wiring diagraln and
in Fig. 13.
NOTE: For wire runs up to 50 fl, use no. 18 AWG (American
Wire Gage) insulated wire (35 Cminimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 Cminimum). For over
75 fl, use no. 14 AWG insulated wire (35 CMinimum). 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.
Text continued on puge 23.
-DAMPER MOTOR
ACCESS COVER
J
i 1 m_--.--
CONDENSATE
ACCESS
(P .... DI
DRAIN CONNECTION [1208]
/5-1/4
[132 I
SUPPLY RETURN
AIR AIR
Fig. 10- Condensate Drain Details
The correct power phasing is critical to the operation of the
scroll compressors. An incorrect phasing will result in
compressor shutdown on thermal overload and possible
dmnage to compressor. Should this occur, power phase cor-
rection must be made to the incoming powec
Unit cabinet must have an uninterrupted, unbroken electri-
cal ground to minimize the possibility of personal injury if
an electrical fault should occuc This ground may consist of
electrical wire connected to unit ground lug in control com-
p_utment, or conduit approved for electrical ground when
inst_dled in accordance with NEC, ANSI/NFPA (National
File Protection Association), latest edition, and local elec-
trical codes. Failure to follow this warning could result in
the installer being liable for personal injury of others.
ONE_N.PER BASE I I I INq"
1OFT OFUNE \ RAIL --I _-[__J/t
\z' MiNI [Z/I
T OOi SEE
NOTE
_ROOF
I CURB
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended,
Fig. 11 -- Condensate Drain Piping Details
10
Table 4A -- Electrical Data -- Units Without Convenience Outlet
UNIT
SIZE
50HJ
020
VOLTAGE COMPRESSOR OFM ELECTRIC
NOMINAL RANGE No. 1 No. 2 No. 3 HEAT
VOLTAGE
(3 Ph, 80 Hz) MIn Max RLA LRA RLA LRA RLA LRA Gty Hp FLA kW FLA Hp
IFM
FLA
3.7 10.6/9.6
-- -- 5 16.7/15.2
7.5 24.2/22
3.7 10.6/9.6
19/25 52/ 60 5 16.7/15.2
7.5 24.2/22
3.7 10.6/9.6
38/50 104/120 5 16.7/15.2
7.5 24.2/22
3.7 10.6/9.6
56/75t 156/180 5 16.7/15.2
7.5 24.2/22
3.7 4.8
-- -- 5 7.6
7.5 11
3.7 4.8
25 30 5 7.6
7.5 11
3.7 4.8
50 60 5 7.6
7.5 11
3.7 4.8
75 90 5 7.6
7.5 11
208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5
460 414 506 9 70 9 70 10.7 90 4 0.25 0.7
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
Gty Hp _La_ MCA MOCP* FLA
78/ 77 100/ 90 83/ 82
2 1 5.9 90/ 89 100/100 97/ 96
84/ 83 100/100 90/ 89
2 1 5.9 96/ 94 100/100 104/102
92/ 89 100/100 99/ 96
2 1 5.9 104/101 125/110 112/110
78/ 87 100/ 90 83/ 82
2 1 5.9 93/102 100/110 97/ 96
86/ 94 100/100 90/ 89
2 1 5.9 101/109 110/110 104/102
95/103 100/110 99/ 96
2 1 5.9 110/117 125/125 112/110
143/132 150/150 132/149
2 1 5.9 158/147 175/150 145/163
151/139 175/150 139/155
2 1 5.9 166/154 175/175 152/169
160/148 175/150 147/163
2 1 5.9 175/162 200/175 161/177
78/ 77 100/ 90 83/ 82
2 1 5.9 90/ 89 100/100 97/ 96
84/ 83 100/100 90/ 89
2 1 5.9 96/ 94 100/100 104/102
92/ 89 100/100 99/ 96
2 1 5.9 104/101 125/110 112/110
39 45 42
2 1 3.1 45 50 49
42 50 45
2 1 3.1 48 50 52
45 50 49
2 1 3.1 51 60 56
44 45 42
2 1 3.1 51 60 49
47 50 45
2 1 3.1 55 60 52
51 60 49
2 1 3.1 59 60 56
66 80 75
2 1 3.1 74 80 82
70 80 78
2 1 3.1 77 80 85
74 80 82
2 1 3.1 82 90 89
96 100 109
2 1 3.1 104 110 116
100 110 112
2 1 3.1 107 125 119
104 125 116
2 1 3.1 112 125 123
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
NACR -- Heating, AirConditioningand MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent of voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviatk)n from average voltage
average voltage
Example: Supply voltage is 460-3-60.
AB C AB = 452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
=---;-
=457
Determine maximum deviation from average w>ltage.
(AB) 457 -452 = 5 v
(BC) 464 -457 = 7 v
(AC) 457 -455 = 2 v
Maximum deviation is 7 v.
Determine percent o1 voltage imbalance.
7
% Voltage Imbalance= 100x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more yourlocal electric utility company immediately, than 2%, contact
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240,480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
11
UNIT
SIZE
5OHJ
020
Table 4A -- Electrical Data -- Units Without Convenience Outlet (cont)
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE FLA
(3Ph, 80Hz) Mln Max RLA LRA RLA LRA RLA LRA Qty Hp _,'ea' kW FLA Hp FLA Qty Hp _L,I MCA MOCP* FLA
575 518 633 7 55 7 55 9.3
24.8 24
73 4 0.25 0.7
48.3 46
75
32 40 35
3 3.9 2 1 2.4 37 45 40
35 40 37
5 6.1 2 1 2.4 39 45 43
37 45 40
7.5 9 2 1 2.4 42 50 46
35 40 35
3 3.9 2 1 2.4 41 45 40
38 40 37
5 6.1 2 1 2.4 44 45 43
41 45 40
7.5 9 2 1 2.4 47 50 46
62 70 57
3 3.9 2 1 2.4 68 70 63
65 70 60
5 6.1 2 1 2.4 71 80 65
69 70 63
7.5 9 2 1 2.4 75 80 69
80 90 91
3 3.9 2 1 2.4 86 90 96
83 90 93
5 6.1 2 1 2.4 89 190 99
86 100 97
7.5 9 2 1 2.4 92 190 102
UNIT
SIZE
50HJ
020
ELECTRIC HEAT BRANCH CIRCUIT 208/240 75-kW ELECTRIC HEAT't
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
MIn Max LRA LRA LRA Qty (ea) kW FLA Hp FLA (ea) MCA MOCP* FLA
208/240 ........ 56/75 156/180 -- -- -- 156/180 175/200 179/207
FEEDER CIRCUIT FOR 208/230 UNIT WITH 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR ELECTRIC
UNIT NOMINAL RANGE NO. 1 NO. 2 NO. 3 OFM HEAT IFM
SIZE VOLTAGE FLA
50HJ (3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Gty Hp (ea) kW FLA Hp FLA
3.7 10.6/ 9.6
020 208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5 56/75 156/180 5 16.7/15.2
7.5 24.2_2.0
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA MCA MOCP* FLAQty Hp
169/192 200/225 192/218
2 1 5.9 184/207 209/225 205/232
177/199 209/225 199/224
2 1 5.9 192/214 209/225 212/238
186/208 200/225 207/232
2 1 5.9 201/222 225/225 221/246
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
HACR -- Heating, Air Conditioning and MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Arnps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 449), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imhalar_ce in supply voltage is greater than 2%.
Use the folk)wing formula to determine the percent o1 voltage imbalance.
% Voltage Imbalance
=100 x max voltage deviation from average voltage
average voltage
Example: Supply voltage is 460-3=60.
A a C AB =452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
3
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 of voltage imbalance.
7
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your ]
local electric utility company immediately. ]
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
=457
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 469, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240, 480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
12
Table 4A -- Electrical Data -- Units Without Convenience Outlet (cont)
UNIT
SIZE
50HJ
024
VOLTAGE COMPRESSOR OFM ELECTRIC
NOMINAL RANGE No. 1 No. 2 No. 3 HEAT
VOLTAGE
(3Ph, 6OHz) Mln Max RLA LRA RLA LRA RLA LRA Gty Hp _!!FLA kW FLA Hp
208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5
IFM
FLA
3.7 10.6/9.6
5 16.7/15.2
7.5 24.2/22
10 30.8/28
3.7 10.6/9.6
5 16.7/15.2
19/25 52/60
7.5 24.2/22
10 30.8/28
3.7 10.6/9.6
5 16.7/15.2
88/50 104/120
7.5 24.2/22
10 30.8/28
3.7 10.6/9.6
5 16.7/15.2
56/75t 156/180
7.5 24.2/22
10 30.8/28
3.7 4.8
5 7.6
7.5 11
10 14
3.7 4.8
5 7.6
25 30
7.5 11
10 14
3.7 4.8
5 7.6
50 60
7.5 11
10 14
3.7 4.8
5 7.6
75 90
7.5 11
46O 414 506 10.7 90 10.7 90 10.7 90 4 0.25 0.7
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA
Qty Hp (ea) MCA MOCP* FLA
][89/ 88 100/100 96/ 95
2 1 5.9 101/100 110/110 110/109
96/ 94 100/100 103/102
2 1 5.9 107/106 125/125 117/115
103/101 125/110 112/109
2 1 5.9 115/113 125/125 126/123
112/108 125/125 120/116
2 1 5.9 124/120 150/125 133/130
89/ 88 100/100 96/ 95
2 1 5.9 101/102 110/110 110/109
96/ 94 100/100 103/102
2 1 5.9 107/109 125/125 117/115
103/103 125/110 112/109
2 1 5.9 115/117 125/125 126/123
112/110 125/125 120/116
2 1 5.9 124/125 150/125 133/130
143/132 150/150 132/149
2 1 5.9 158/147 175/150 145/163
151/139 175/150 139/155
2 1 5.9 166/154 175/175 152/169
160/148 175/150 147/163
2 1 5.9 175/162 200/175 161/177
169/155 175/175 155/170
2 1 5.9 183/170 200/175 169/184
89/ 88 100/100 96/ 95
2 1 5.9 101/100 110/110 110/109
96/ 94 100/100 103/102
2 1 5.9 107/106 125/125 117/115
103/101 125/110 112/109
2 1 5.9 115/113 125/125 126/123
112/108 125/125 120/116
2 1 5.9 124/120 150/125 133/130
42 50 46
2 1 3.1 49 50 53
45 50 49
2 1 3.1 51 60 56
49 50 53
2 1 3.1 55 60 60
52 60 56
2 1 3.1 59 60 63
44 50 46
2 1 3.1 51 60 53
47 50 49
2 1 3.1 55 60 56
51 60 53
2 1 3.1 59 60 60
55 60 56
2 1 3.1 63 70 63
66 80 75
2 1 3.1 74 80 82
70 80 78
2 1 3.1 77 80 85
74 80 82
2 1 3.1 82 90 89
78 90 85
2 1 3.1 85 90 92
96 1O0 109
2 1 3.1 104 110 116
100 110 112
2 1 3.1 107 125 119
104 125 116
2 1 3.1 112 125 123
12O
127
See legend and notes on next page.
]3
UNIT
SIZE
5OHJ
024
Table 4A -- Electrical Data -- Units Without Convenience Outlet (cont)
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VO LTAG E
FLA _L4(3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp iea} kW FLA Hp FLA Qty Hp MCA MODP* FLA
575 518 633 9.3 73 9.3 73 9.3 73 4 0.25 0.7
39 45 42
5 6.1 2 1 2.4 44 50 48
42 50 46
7.5 9 2 1 2.4 47 50 51
44 50 48
10 11 2 1 2.4 49 60 53
39 45 42
5 6.1 2 1 2.4 44 50 48
42 50 46
24.8 24 7.5 9 2 1 2.4 47 50 51
44 50 48
10 11 2 1 2.4 50 60 53
65 70 60
5 6.1 2 1 2.4 71 80 65
69 70 63
48.3 46 7.5 9 2 1 2.4 75 80 69
71 80 66
10 11 2 1 2.4 77 80 71
83 90 93
5 6.1 2 1 2.4 89 100 99
86 100 97
78 75 7.5 9 2 1 2.4 92 100 102
89 100 99
10 11 2 1 2.4 95 100 104
UNIT
SIZE
50HJ
024
ELECTRIC HEAT BRANCH CIRCUIT 208/240 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
MIn Max LRA LRA LRA Qty (ea) kW FLA Hp FLA (ea) MDA MOCP* FLA
208/240 ........ 56/75 156/180 -- -- -- 156/180 175/200 179/207
FEEDER CIRCUIT FOR 208/230 UNIT WITH 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR ELECTRIC
UNIT NOMINAL RANGE NO. 1 NO. 2 NO. 3 OFM HEAT IFM
SIZE VOLTAGE FLA
50HJ (3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp (ea) kW FLA Hp FLA
3.7 10.6/9.6
5 16.7/15.2
024 208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5 56/75 156/180
7.5 24.2/22
10 30.8/28
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA MCA MOCP* FLAQty Hp
169/192 200/225 192/218
2 1 5.9 184/207 200/225 205/232
177/199 200/225 199/224
2 1 5.9 192/214 200/225 212/238
186/208 200/225 207/232
2 1 5.9 201/222 225/225 221/246
195/215 225/225 215/239
2 1 5.9 209/230 225/250 228/253
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
HACR -- Heating, Air Conditioning and MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75=kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent o1 voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviation from average voltage
average voltage
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 of voltage imbalance.
7
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum alk)wable
2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your ]
local electric utility company immediately. 1
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
Example: Supply voltage is 460-3-60.
A8c AB=452v
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
3
=457
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240, 480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
]4
Table 4A -- Electrical Data -- Units Without Convenience Outlet (cont)
UNIT
SIZE
50HJ
028
VOLTAGE COMPRESSOR ELECTRIC
OFM IFM
NOMINAL RANGE No. 1 No. 2 No. 3 HEAT
VOLTAGE
(3Ph, 6OHz) Mln Max RLA LRA RLA LRA RLA LRA Gty Hp _!!FLA kW FLA Hp FLA
208/230 187 253 47.1 245 47.1 245
5 16.7/15.2
-- -- 7.5 24.2/22
10 30.8/28
5 16.7/15.2
52/60 7.5 24.2/22
10 30.8/28
5 16.7/15.2
38/50 104/120 7.5 24.2/22
10 30.8/28
5 16.7/15.2
56/75t 156/180 7.5 24.2/22
10 30.8/28
5 7.6
-- -- 7.5 11
10 14
5 7.6
25 30 7.5 11
10 14
5 7.6
50 60 7.5 11
10 14
5 7.6
75 90 7.5 11
10 14
460 414 506 19.6 125 19.6 125 6 0.25 0.7
19/25
6 0.25 1.5
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA
Oty Hp (ea) MCA MOCP* FLA
][132/180 175/175 138/138
2 1 5.9 143/142 175/175 151/150
139/137 175/175 147/144
2 1 5.9 151/149 175/175 160/158
146/143 175/175 154/151
2 1 5.9 158/155 200/200 168/164
132/130 175/175 138/136
2 1 5.9 143/142 175/175 151/150
139/137 175/175 147/144
2 1 5.9 151/149 175/175 160/158
146/143 175/175 154/151
2 1 5.9 158/155 200/200 168/164
151/139 175/175 139/155
2 1 5.9 166/154 175/175 152/169
160/148 175/175 147/163
2 1 5.9 175/162 200/175 161/177
169/155 175/175 155/170
2 1 5.9 183/170 200/200 169/184
132/130 175/175 138/136
2 1 5.9 143/142 175/175 151/150
139/137 175/175 147/144
2 1 5.9 151/149 175/175 160/158
146/143 175/175 154/151
2 1 5.9 158/155 200/200 168/164
56 60 59
2 1 3.1 62 80 66
59 60 63
2 1 3.1 66 80 70
62 80 66
2 1 3.1 69 80 73
56 60 59
2 1 3.1 62 80 66
59 60 63
2 1 3.1 66 80 70
62 80 66
2 1 3.1 69 80 73
70 80 78
2 1 3.1 77 80 85
74 80 82
2 1 3.1 82 90 89
78 90 85
2 1 3.1 85 90 92
100 110 112
2 1 3.1 107 125 119
104 125 116
2 1 3.1 112 125 123
108 125 120
2 1 3.1 115 125 127
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
RACR -- Heating, AirCondgioningand MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent of voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviatk)n from average voltage
average vogage
Example: Supply voltage is 460-3-60.
AB C AB = 452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
=---;-
=457
Determine maximum deviation from average w>ltage.
(AB) 457 -452 = 5 v
(BC) 464 -457 = 7 v
(AC) 457 -455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Vogage Imbalance= 100x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more yourlocal electric utility company immediately, than 2%, contact
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240,480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
15
UNIT
SIZE
5OHJ
028
Table 4A -- Electrical Data -- Units Without Convenience Outlet (cont)
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VO LTAG E
FLA _L4(3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp iea} kW FLA Hp FLA Qty Hp MCA MODP* FLA
575 518 633 15.8 100 15.8 100 6 0.25 0.7
46 60 48
5 6.1 2 1 2.4 51 60 54
49 60 52
7.5 9 2 1 2.4 54 60 57
51 60 54
10 11 2 1 2.4 56 60 59
46 60 48
5 6.1 2 1 2.4 51 60 54
49 60 52
24.8 24 7.5 9 2 1 2.4 54 60 57
51 60 54
10 11 2 1 2.4 56 60 59
65 70 60
5 6.1 2 1 2.4 71 80 65
69 70 63
48.3 46 7.5 9 2 1 2.4 75 80 69
71 80 66
10 11 2 1 2.4 77 80 71
83 90 93
5 6.1 2 1 2.4 89 100 99
86 100 97
78 75 7.5 9 2 1 2.4 92 100 102
89 100 99
10 11 2 1 2.4 95 100 104
UNIT
SIZE
50HJ
028
ELECTRIC HEAT BRANCH CIRCUIT 208/240 75-kW ELECTRIC HEAT't
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
MIn Max LRA LRA LRA Qty (ea) kW FLA Hp FLA (ea) MDA MOCP* FLA
208/240 ........ 56/75 156/180 -- -- -- 156/180 175/200 179/207
FEEDER CIRCUIT FOR 208/230 UNIT WITH 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR ELECTRIC
UNIT NOMINAL RANGE NO. 1 NO. 2 NO. 3 OFM HEAT IFM
SIZE VOLTAGE FLA
50HJ (3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp (ea) kW FLA Hp FLA
5 16.7/15.2
028 208/230 187 253 47.1 245 47.1 245 6 0.25 1.5 56/75 156/180 7.5 24.2/22
10 30.8/28
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA MCA MOCP* FLAQty Hp
177/199 200/225 199/224
2 1 5.9 192/214 200/225 212/238
186/208 200/225 207/232
2 1 5.9 201/222 225/225 221/246
195/215 225/225 215/239
2 1 5.9 209/230 225/250 228/253
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
HACR -- Heating, Air Conditioning and MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Arnps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imhalar_ce in supply voltage is greater than 2%.
Use the folk)wing formula to determine the percent o1 voltage imbalance.
% Voltage Imbalance
=100 x max voltage deviation from average voltage
average voltage
Example: Supply voltage is 460-3=60.
A a C AB =452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
3
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 of voltage imbalance.
7
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your ]
local electric utility company immediately. ]
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
=457
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240, 480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
16
Table 4B -- Electrical Data -- Units With Optional Convenience Outlet
UNIT
SIZE
50HJ
020
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE No. 1 No. 2 No. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
(3Ph, SOHz) MIn Max RLA LRA RLA LRA RLA LRA Oty Hp _"t!FLA kW FLA Hp FLA Oty Hp _"t!FLA MCA MOCP* FLA
208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5
46O 414 506 9 70 9 70 10.7 90 4 0.25 0.7
3.7 10.6/9.6
-- -- 5 16.7/15.2
7.5 24.2/22
3.7 10.6/9.6
19/25 52/60 5 16.7/15.2
7.5 24.2/22
3.7 10.6/9.6
38/50 104/120 5 16.7/15.2
7.5 24.2/22
3.7 10.6/9.6
56/75t 156/180 5 16.7/15.2
7.5 24.2/22
3.7 4.8
-- -- 5 7.6
7.5 11
3.7 4.8
25 30 5 7.6
7.5 11
3.7 4.8
50 60 5 7.6
7.5 11
3.7 4.8
75 90 5 7.6
7.5 11
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
RACR -- Heating, AirConditioningand MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent of voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviatk)n from average voltage
average voltage
Example: Supply voltage is 460-3-60.
AB C AB = 452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
=.--_-
=457
83/ 82 100/100 89/ 88
2 1 5.9 95/ 94 100/100 103/101
89/ 88 100/100 96/ 94
2 1 5.9 101/ 99 110/100 110/108
97/ 94 100/100 105/102
2 1 5.9 109/106 125/125 118/116
85/ 93 100/100 89/ 88
2 1 5.9 99/108 100/110 103/101
92/100 100/110 96/ 94
2 1 5.9 107/115 110/125 110/108
102/109 110/110 105/102
2 1 5.9 116/124 125/125 118/116
150/138 150/150 138/155
2 1 5.9 164/153 175/175 151/168
157/145 175/150 145/161
2 1 5.9 172/160 175/175 158/175
167/154 175/175 153/169
2 1 5.9 181/169 200/175 167/183
83/ 82 100/100 89/ 88
2 1 5.9 95/ 94 100/100 103/101
89/ 88 100/100 96/ 94
2 1 5.9 101/ 99 110/100 110/108
97/ 94 100/100 105/102
2 1 5.9 109/106 125/125 118/116
42 50 45
2 1 3.1 48 50 52
45 50 48
2 1 3.1 51 60 56
48 50 52
2 1 3.1 54 60 59
47 50 45
2 1 3.1 55 60 52
51 60 48
2 1 3.1 59 60 56
55 60 52
2 1 3.1 63 70 59
70 80 78
2 1 3.1 78 80 85
73 80 81
2 1 3.1 81 90 88
78 80 85
2 1 3.1 85 90 92
100 110 112
2 1 3.1 108 125 120
103 125 116
2 1 3.1 111 125 123
108 125 120
2 1 3.1 115 125 127
Determine maximum deviation from average w>ltage.
(AB) 457 -452 = 5 v
(BC) 464 -457 = 7 v
(AC) 457 -455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance= 100x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
I IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your
local electric utility company immediately.
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240,480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x {IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
17
UNIT
SIZE
5OHJ
020
Table 4B -- Electrical Data -- Units With Optional Convenience Outlet (cont)
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY
VO LTAG E
FLA _L4(3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp iea} kW FLA Hp FLA Qty Hp MCA MODP*
35 4O
3 3.9 2 1 2.4 40 45
38 45
5 6.1 2 1 2.4 42 50
40 45
7.5 9 2 1 2.4 45 50
39 40
3 3.9 2 1 2.4 45 45
41 45
24.8 24 5 6.1 2 1 2.4 47 50
45 50
7.5 9 2 1 2.4 51 60
66 70
3 3.9 2 1 2.4 72 80
69 70
48.3 46 5 6.1 2 1 2.4 75 80
73 80
7.5 9 2 1 2.4 79 80
84 90
3 3.9 2 1 2.4 90 100
86 100
78 75 5 6.1 2 1 2.4 92 100
90 100
7.5 9 2 1 2.4 96 100
575 518 633 7 55 7 55 9.3 73 4 0.25 0.7
DISCONNECT
SIZE
FLA
38
43
4O
46
44
49
38
43
4O
46
44
49
61
66
63
69
67
72
94
100
97
102
100
106
UNIT
SIZE
50HJ
020
ELECTRIC HEAT BRANCH CIRCUIT 208/240 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE IH -- I I
MIn Max LRA LRA LRA Qty (ea) kW FLA Hp FLA (ea) MDA MOCP* FLA
208/240 ........ 56/75 156/180 -- -- -- 156/180 175/200 179/207
FEEDER CIRCUIT FOR 208/230 UNIT WITH 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR ELECTRIC
UNIT NOMINAL RANGE NO. 1 NO. 2 NO. 3 OFM HEAT IFM
SIZE VOLTAGE FLA
50HJ (3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp (ea) kW FLA Hp FLA
3.7 10.6/9.6
020 208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5 56/75 156/180 5 16.7/15.2
7.5 24.2/22
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA MCA MOCP* FLAQty Hp
176/198 200/225 197/224
2 1 5.9 190/213 200/225 211/237
183/205 200/225 204/230
2 1 5.9 198/220 200/225 218/244
193/214 200/225 213/238
2 1 5.9 207/229 225/250 227/252
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Arnps
HACR -- Heating, Air Conditioning and MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the folk)wing formula to determine the percent o1 voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviation from average voltage
average voltage
Example: Supply voltage is 460-3=60.
ABC AB =452 v
(_ BC =464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
3
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 of voltage imbalance.
7
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your ]
local electric utility company immediately. 1
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
=457
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240, 480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
18
Table 4B -- Electrical Data -- Units With Optional Convenience Outlet (cont)
UNIT
SIZE
50HJ
024
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE No. 1 No. 2 No. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
(3Ph, 6OHz) Mln Max RLA LRA RLA LRA RLA LRA Oty Hp _a!!FLA kW F LA Hp F LA Qty Hp _a!FLA MCA MOCP* F LA
208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5
460 414 506 10.7 90 10.7 90 10.7 90 4 0.25 0.7
3.7 10.6/9.6
5 16.7/15.2
7.5 24.2/22
10 30.8/28
3.7 10.6/9.6
5 16.7/15.2
19/25 52/60
7.5 24.2/22
10 30.8/28
3.7 10.6/9.6
5 16.7/15.2
38/50 104/120
7.5 24.2/22
10 30.8/28
3.7 10.6/9.6
5 16.7/15.2
56/75t 156/180
7.5 24.2/22
10 30.8/28
3.7 4.8
5 7.6
7.5 11
10 14
3.7 4.8
5 7.6
25 30
7.5 11
10 14
3.7 4.8
5 7.6
50 60
7.5 11
10 14
3.7 4.8
5 7.6
75 90
7.5 11
94 /93 100/100 102/101
2 1 5.9 106/105 125/125 116/115
101/ 99 110/100 109/107
2 1 5.9 112/111 125/125 123/121
108/106 125/125 118/115
2 1 5.9 120/118 125/125 131/129
117/113 125/125 125/122
2 1 5.9 129/125 150/150 139/136
94/ 93 100/100 102/101
2 1 5.9 106/108 125/125 116/115
101/100 110/110 109/107
2 1 5.9 112/115 125/125 123/121
108/109 125/125 118/115
2 1 5.9 120/124 125/125 131/129
117/116 125/125 125/122
2 1 5.9 129/131 150/150 139/136
150/138 150/150 138/155
2 1 5.9 164/153 175/175 151/168
157/145 175/150 145/161
2 1 5.9 172/160 175/175 158/175
167/154 175/175 153/169
2 1 5.9 181/169 200/175 167/183
175/161 175/175 161/176
2 1 5.9 190/176 200/200 174/190
94/ 93 100/100 102/101
2 1 5.9 106/105 125/125 116/115
101/ 99 110/100 109/107
2 1 5.9 112/111 125/125 123/121
108/106 125/125 118/115
2 1 5.9 120/118 125/125 131/129
117/113 125/125 125/122
2 1 5.9 129/125 150/150 139/136
45 50 49
2 1 3.1 52 60 56
48 50 52
2 1 3.1 54 60 59
52 60 56
2 1 3.1 58 60 63
55 60 60
2 1 3.1 62 70 67
47 50 49
2 1 3.1 55 60 56
51 60 52
2 1 3.1 59 60 59
55 60 56
2 1 3.1 63 70 63
59 60 60
2 1 3.1 67 70 67
70 80 78
2 1 3.1 78 80 85
73 80 81
2 1 3.1 81 90 88
78 80 85
2 1 3.1 85 90 92
81 90 89
2 1 3.1 89 100 96
100 110 112
2 1 3.1 108 125 120
103 125 116
2 1 3.1 111 125 123
108 125 120
2 1 3.1 115 125 127
123
13O
See legend and notes on next page.
19
UNIT
SIZE
5OHJ
024
Table 4B -- Electrical Data -- Units With Optional Convenience Outlet (cont)
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VO LTAG E
FLA _L4(3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp iea} kW FLA Hp FLA Qty Hp MCA MODP* FLA
575 518 633 9.3 73 9.3 73 9.3 73 4 0.25 0.7
42 50 46
5 6.1 2 1 2.4 47 50 51
45 50 49
7.5 9 2 1 2.4 50 50 55
47 50 51
10 11 2 1 2.4 52 60 57
42 50 46
5 6.1 2 1 2.4 47 50 51
45 50 49
24.8 24 7.5 9 2 1 2.4 51 60 55
48 50 51
10 11 2 1 2.4 54 60 57
69 70 63
5 6.1 2 1 2.4 75 80 69
73 80 67
48.3 46 7.5 9 2 1 2.4 79 80 72
75 80 69
10 11 2 1 2.4 81 90 75
86 100 97
5 6.1 2 1 2.4 92 100 102
90 100 100
78 75 7.5 9 2 1 2.4 96 100 106
93 100 102
10 11 2 1 2.4 99 100 108
UNIT
SIZE
50HJ
024
ELECTRIC HEAT BRANCH CIRCUIT 208/240 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
MIn Max LRA LRA LRA Qty (ea) kW FLA Hp FLA (ea) MDA MOCP* FLA
208/240 ........ 56/75 156/180 -- -- -- 156/180 175/200 179/207
FEEDER CIRCUIT FOR 208/230 UNIT WITH 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR ELECTRIC
UNIT NOMINAL RANGE NO. 1 NO. 2 NO. 3 OFM HEAT IFM
SIZE VOLTAGE FLA
50HJ (3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp (ea) kW FLA Hp FLA
3.7 10.6/9.6
5 16.7/15.2
024 208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5 56/75 156/180
7.5 24.2/22
10 30.8/28
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA MCA MOCP* FLAQty Hp
176/198 200/225 197/224
2 1 5.9 190/213 200/225 211/237
183/205 200/225 204/230
2 1 5.9 198/220 200/225 218/244
193/214 200/225 213/238
2 1 5.9 207/229 225/250 227/252
201/221 225/225 221/245
2 1 5.9 216/236 225/250 234/259
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
HACR -- Heating, Air Conditioning and MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75=kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent o1 voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviation from average voltage
average voltage
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 of voltage imbalance.
7
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum alk)wable
2%.
IMPORTANT: If the supply vol'_ge phase imbalance is more than 2%, contact your I
local electric utility company immediately. I
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
Example: Supply voltage is 460-3-60.
A8c AB=452v
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
3
=457
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240, 480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
20
Table 4B -- Electrical Data -- Units With Optional Convenience Outlet (cont)
UNIT
SIZE
50HJ
028
VOLTAGE COMPRESSOR ELECTRIC
OFM IFM
NOMINAL RANGE No. 1 No. 2 No. 3 HEAT
VOLTAGE
(3Ph, 6OHz) Mln Max RLA LRA RLA LRA RLA LRA Gty Hp _!!FLA kW FLA Hp FLA
208/230 187 253 47.1 245 47.1 245
5 16.7/15.2
-- -- 7.5 24.2/22
10 30.8/28
5 16.7/15.2
52/60 7.5 24.2/22
10 30.8/28
5 16.7/15.2
38/50 104/120 7.5 24.2/22
10 30.8/28
5 16.7/15.2
56/75t 156/180 7.5 24.2/22
10 30.8/28
5 7.6
-- -- 7.5 11
10 14
5 7.6
25 30 7.5 11
10 14
5 7.6
50 60 7.5 11
10 14
5 7.6
75 90 7.5 11
10 14
460 414 506 19.6 125 19.6 125 6 0.25 0.7
19/25
6 0.25 1.5
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA
Oty Hp (ea) MCA MOCP* FLA
][137/135 175/175 144/142
2 1 5.9 148/147 175/175 157/155
144/142 175/175 152/150
2 1 5.9 156/154 200/200 166/163
151/148 175/175 160/157
2 1 5.9 163/160 200/200 173/170
137/135 175/175 144/142
2 1 5.9 148/147 175/175 157/155
144/142 175/175 152/150
2 1 5.9 156/154 200/200 166/163
151/148 175/175 160/157
2 1 5.9 163/160 200/200 173/170
157/145 175/175 145/161
2 1 5.9 172/160 175/175 158/175
167/154 175/175 153/169
2 1 5.9 181/169 200/200 167/183
175/161 175/175 161/176
2 1 5.9 190/176 200/200 174/190
137/135 175/175 144/142
2 1 5.9 148/147 175/175 157/155
144/142 175/175 152/150
2 1 5.9 156/154 200/200 166/163
151/148 175/175 160/157
2 1 5.9 163/160 200/200 173/170
59 60 62
2 1 3.1 65 80 69
62 80 66
2 1 3.1 69 80 73
65 80 69
2 1 3.1 72 90 77
59 60 62
2 1 3.1 65 80 69
62 80 66
2 1 3.1 69 80 73
65 80 69
2 1 3.1 72 90 77
73 80 81
2 1 3.1 81 90 88
78 80 85
2 1 3.1 85 90 92
81 90 89
2 1 3.1 89 100 96
103 125 116
2 1 3.1 111 125 123
108 125 120
2 1 3.1 115 125 127
111 125 123
2 1 3.1 119 125 130
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
RACR -- Heating, AirCondgioningand MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Amps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent of voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviatk)n from average voltage
average vogage
Example: Supply voltage is 460-3-60.
AB C AB = 452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
=---;-
=457
Determine maximum deviation from average w>ltage.
(AB) 457 -452 = 5 v
(BC) 464 -457 = 7 v
(AC) 457 -455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Vogage Imbalance= 100x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more yourlocal electric utility company immediately, than 2%, contact
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240,480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
21
UNIT
SIZE
5OHJ
028
Table 4B -- Electrical Data -- Units With Optional Convenience Outlet (cont)
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY
VO LTAG E
FLA _L4(3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp iea} kW FLA Hp FLA Qty Hp MCA MODP*
49 60
5 6.1 2 1 2.4 54 60
52 60
7.5 9 2 1 2.4 57 60
54 60
10 11 2 1 2.4 59 60
49 60
5 6.1 2 1 2.4 54 60
52 60
24.8 24 7.5 9 2 1 2.4 57 60
54 60
10 11 2 1 2.4 59 60
69 70
5 6.1 2 1 2.4 75 80
73 80
48.3 46 7.5 9 2 1 2.4 79 80
75 80
10 11 2 1 2.4 81 90
86 100
575 518 633 15.8 100 15.8 100 6 0.25 0.7
78
5 6.1 2 1 2.4 92 100
90 100
75 7.5 9 2 1 2.4 96 100
93 100
10 11 2 1 2.4 99 100
DISCONNECT
SIZE
FLA
52
57
55
6O
57
63
52
57
55
6O
57
63
63
69
67
72
69
75
97
102
100
106
102
108
UNIT
SIZE
50HJ
028
ELECTRIC HEAT BRANCH CIRCUIT 208/240 75-kW ELECTRIC HEAT't
VOLTAGE COMPRESSOR OFM ELECTRIC IFM POWER POWER DISCONNECT
NOMINAL RANGE NO. 1 NO. 2 NO. 3 HEAT EXHAUST SUPPLY SIZE
VOLTAGE
MIn Max LRA LRA LRA Qty (ea) kW FLA Hp FLA (ea) MDA MOCP* FLA
208/240 ........ 56/75 156/180 -- -- -- 156/180 175/200 179/207
FEEDER CIRCUIT FOR 208/230 UNIT WITH 75-kW ELECTRIC HEATt
VOLTAGE COMPRESSOR ELECTRIC
UNIT NOMINAL RANGE NO. 1 NO. 2 NO. 3 OFM HEAT IFM
SIZE VOLTAGE FLA
50HJ (3 Ph, 80 HZ) MIn Max RLA LRA RLA LRA RLA LRA Qty Hp (ea) kW FLA Hp FLA
5 16.7/15.2
028 208/230 187 253 47.1 245 47.1 245 6 0.25 1.5 56/75 156/180 7.5 24.2/22
10 30.8/28
POWER POWER DISCONNECT
EXHAUST SUPPLY SIZE
FLA MCA MOCP* FLAQty Hp
183/205 200/225 204/230
2 1 5.9 198/220 200/225 218/244
193/214 200/225 213/238
2 1 5.9 207/229 225/250 227/252
201/221 225/225 221/245
2 1 5.9 216/236 225/250 234/259
LEGEND
FLA -- Full Load Amps MCA -- Minimum Circuit Amps
HACR -- Heating, Air Conditioning and MOCP -- Maximum Overcurrent Protection
Refrigeration NEC -- National Electrical Code
IFM -- Indoor (Evaporator) Fan Motor OFM -- Outdoor (Condenser) Fan Motor
LRA -- Locked Rotor Arnps RLA -- Rated Load Amps
*Fuse or HACR circuit breaker.
1-208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the
branch circuit values for the refrigeration part of the system. The following two tables list
the branch circuit values for the electric heat and values for a feeder circuit for both branch
circuits.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imhalar_ce in supply voltage is greater than 2%.
Use the folk)wing formula to determine the percent o1 voltage imbalance.
% Voltage Imbalance
=100 x max voltage deviation from average voltage
average voltage
Example: Supply voltage is 460-3=60.
A a C AB =452 v
(_ BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
3
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 of voltage imbalance.
7
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your ]
local electric utility company immediately. ]
3. The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa-
=457
rately in the field.
4. The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v
units, respectively.
5. The FLA load amps provided in the table for electric heaters are based on 208/240, 480
and 600 v.
6. MCA calculation for 50HJ units with electric heaters over 50 kW is = 1.25 x (IFM +
Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).
22
I FIELD
P
IPOWER
SUPPLY
z _
€.)W
me_t
.=. i
I
!
I
I
L........... J
TBI
EQUIP GND
LEGEND
EQUIP -- Equipment
GND -- Ground
NEC -- National Electrical Code
TB I Terminal Board
NOTE: The maximum wire size for TB1 is 2/0.
Fig. 12- Field Power Wiring Connections
THERMOSTAT ASSEMBLY
I E+ ER[
Jll 1 2 3 4 5 6 7 8
Fig. 13- Field Control Thermostat Wiring
Set heat anticipator settings as shown in Table 5.
Table 5 -- Heat Anticipator Settings
UNIT SIZE
50HJ
020-028
ELECTRIC
HEAT (kW)
25
5O
75
STAGE 1
(Wl) ON
Voltage
208/240 480
0.2 0.2
0.4 0.2
0.4 0.2
STAGES 1 AND 2
(Wl and W2) ON
Voltage
600 208/240 480 600
0.2 0.4 0.4 0.4
0.2 0.8 0.4 0.4
0.2 0.8 0.4 0.4
Settings may be changed slightly to provide a greater degree
of comfort for a pallicular instalhnion.
Step 8 -- Install Outdoor-Air Hood -- Perform
the following procedure to inst_dl file outdoor-air hood on units
equipped with an economize1: two-position dalnper, oi"
outdoor-air dmnper:
1. Remove blank panel from return end of unit (hood sec-
tion). Save the screws. See Fig. 14 for shipping location
of components.
2. Hood sides are fastened to sides of outdoor air opening.
Remove the hood sides and save the screws (3 each side).
3. Remove the bracket holding the bottom half of the hood
in the shipping position. Remove the hood bottom half
and filtels (or manual &tmpers on units so equipped)
from outdoor section.
NOTE: On units without economizers, the components
are attached to the unit basepan. To access the compo-
nents, remove the panel below the outdoor air intake
section.
4. Remove inner tilter track from shipping position in out-
door section. Position inner filter track so the track is fac-
ing outward from the unit. Install the filter track with
4 screws provided.
5. Apply seal strip (provided) to back flange of both hood
sides where hood side connects to the unit back panel.
See Fig. 15.
6. Apply seal strip (provided) to top flange of both hood
sides where hood sides connect to the hood top panels.
See Fig. 15.
7. [nst;dl hood sides to the back panels using the screws from
Step 2. The sloped flanges point outward. The diip edges
of file side panels should face outwm'd as well. The filter
guides should face inward to hold the tilters in place. See
Fig. 15.
8. Apply seal strip along the entire length of the bottom
flange of the hood top. See Fig. 15.
9. Inst;fll the bottom part of the hood top using 4 sclews pro-
vided. See Fig. 15.
10. Remove the packaging from filtel.s (3) and install into the
tilter tracks. Slide the filters to the sides then place the last
tilter into the center of the filter track.
NOTE: For units with manual &lmpers, replace the end tilters
with the manual dalnpers. Install the filter in the center
between the manual &lmpers.
11. Inst_fll the filter retainer Uack along the bottom edge of the
outdoor air hood using 4 screws provided. See Fig. 15.
12. Inst_dl top section of the outdoor-tfir hood using 9 screws
provided. See Fig. 15. See Fig. 16 for a picture of the
assembled outdoor-air hood.
NOTE: For tilter removal, remove the four screws holding the
tilter retainec The filters can then be removed, cleaned, or
replaced, install file filters by reversing the procedure.
MANUAL DAMPER ASSEMBLY-- For units equipped
with manual dampers, the assembly process is similar to the
outdoor-air hood for units with economizers. There are two slide
&tmpers shipped with the unit to allow for manual setting of the
outside tfir volume. When assembling the hood, place one of the
manual slide dampers in each of the end positions and the re-
maining filter in the center position. The manual &Lmpers can
then be moved to the appropriate position and then locked into
place using the screws mounted in the adjustment slots. See
Fig. 17.
HOODTOP
HOOD
SIDE
HOOD HOOD TOP
SIDE BOTTOM HALF)
SECTION
Fig. 14 -- Outdoor-Air Hood Compartment
Shipping Location
23
TOP HOOD
SECTION
SEAL
STRIP
HOOD
SECTION
ADD
SEAL
HOOD STRIP
SIDE ADD
STRIP INNER
FILTER
ADD
SEAL
STRIP
ADD
SEAL
GUIDE
FILTER
FINER
DAMPER
(IF EQUIPPED)
NOTE: Units with manual damper only use one filter.
Fig. 15 -- Outdoor-Air Hood Details
HOOD
SIDE
UNIT
BACK
PANEL
Fig. 16 -- Outdoor-Air Hood Assembled
MOVEABLE DAMPER j
AIR FILTER POSITION MOVEABLE DAMPER
Fig. 17 -- Manual Damper Details
24
Step 9 -- Position Optional Power Exhaust or
Barometric Relief Damper Hood -- The optional
power exhaust or barometric relief dampers are shipped
assembled and tilted back into the unit for shipping. Brack-
ets and extra screws are shipped in shrink wrap around the
dampers.
1. Remove 9 screws holding each dmnper assembly in
place. See Fig. 18. Each damper assembly is secured with
3 screws on each side and 3 screws along the bottom.
Save screws.
Use cme when tilting blower assembly. Hoods and blowers
me heavy and can cause injury if diopped.
7. From the inside of the corner post, attach the handle
mounting screws to file handle. Slide the shaft fully into
file handle and tighten the set screws(s) on the disconnect
to lock file shall. Tighten file screws that attach the handle
to the corner post.
8. Rotate the handle back to the "OFF" position.
9. Replace _fllpanels and doors.
10. Restore power to unit.
Step 11 -- Install All Accessories --After all of
the factory-installed options have been adjusted, install all
field-inst_dled accessories. Refer to the accessory installation
instructions included with each accessory. Consult the C_urier
Price Pages for accessory package numbeLs for particular
applications.
2. Pivot the damper assembly outwaM until top edge of
damper assembly rests against inside wall of unit.
3. Secure each damper assembly to unit with 6 screws
across top (3 screws provided) and bottom (3 screws
from Step 1) of dampo:
4. With screws saved from Step 1, install brackets on each
side of &tmper assembly. See Fig. 19.
5. Remove tape from damper blades.
Step 10 -- Non-Fused Disconnect -- The handle
for the factory-installed non-fused disconnect is shipped inside
the unit to prevent the handle from &tmage during shipping.
Follow these steps to complete inst_fllation of the handle.
Be sure power is shut off to file unit fiom tile building
power supply. Electrical shock could cause personal injury.
1. Open the control box access dool:
2. Remove the small cover plate located on the unit corner
post near the control section.
3. Remove the inner control box covel: The handle and shaft
are located in a plastic bag at the bottom of the control
box.
4. Insert the square shaft into the disconnect with the pins
vertical. On the 100 amp disconnect the shaft is keyed
into the disconnect and can only be installed one way
with the pins vertical.
5. Insert the handle through the corner post and onto the
shaft with the handle positioned so that "OFF' is on top.
6. Rotate the handle to the "ON" position to lock the pins
into the handle.
@
©
Fig. 19- Bracket and Hood Positioning
REMOVE
SCREWS\
REMOVE
SCREWS
__ REMOVE
_ SCREWS
Fig. 18 -- Power Exhaust or Barometric Relief Damper Mounting Details
25
PRE-START-UP
Failure to observe the following warnings could result in
serious personal injuu:
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refiigerant system.
2. Do not operate compressor or provide any electric pow-
er to unit unless compressor terminal cover is in place
and secured.
3. Do not remove compressor terminal cover until all elec-
trical sources are disconnected and properly tagged.
4. Relieve all pressure fiom system before touching or dis-
turbing anything inside terminal box if refrigerant leak is
suspected _u_ound compressor terminals. Use accepted
methods to recover refrigerant.
5. Never attempt to repair soldered connection while re-
frigerant system is under pressure.
6. Do not use torch to remove any component. System
contains oil and refrigerant under pressure. To remove a
component, wetu _ protective goggles and proceed as
follows:
a. Shut off electrical power to unit and inst_dl lockout tag.
b. Relieve all pressme from system using both high-and
low-pressme ports. Use accepted methods to recover
refrigerant.
c. Cut component connection tubing with tubing cutter
and lemove component from unit.
d. Carefully unsweat remaining tubing stubs when nec-
esstu'y. Oil can ignite when exposed to torch flmne.
Proceed as follows to inspect and prepare the unit for initkd
st¢ut-up:
1. Remove all access panels.
2. Read and follow instructions on all WARNING. CAU-
TION, and INFORMATION labels attached to or
shipped with unit.
3. Make the following inspections:
a. Inspect for shipping and handling &_mages such as
broken lines, loose parts, or disconnected wires.
b. Inspect for oil at all refrigerant tubing connections
and on unit base. Detecting oil generally indicates a
refrigerant leak. Leak-test all refrigerant tubing con-
nections using electronic leak detector, halide torch,
or liquid-soap solution.
c. Inspect all field-wiring and factoq-wiring connec-
tions. Be sure that connections are completed and
tight.
d. Inspect coil fins. If damaged during shipping and
handling, ctu'elhlly straighten fins with a fin comb.
4. Verify the following:
a. Make sure that condenser-fan blades are correctly
positioned in fan orifice. Refer to Condenser-Fan
Adjustment section on page 45 for more details.
b. Make sure that air filters are in place.
c. Make sure that condensate drain trap is filled with
water to ensure proper di'ainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
e. Make sure that the st_ut-up checklist has been per-
formed and filled out.
NOTE: Ensure wiring does not contact any refiigemnt tubing.
START-UP
Use the following inforlnation and St_ut-Up Checklist on
page CL-I to check out unit PRIOR to start-up.
Unit Preparation -- Check that unit has been installed in
accordance with these installation instructions and all applica-
ble codes.
Compressor Mounting- Compressors are internally
spring mounted. Do not loosen or remove compressor hold-
down bolts.
Refrigerant Service Ports-- Each independent re-
fi'igerant system has a total of 3 Schmder-type service gage
ports per circuit. One port is located on the suction line, one on
the complessor disch;uge line, and one on the liquid line. Be
sure that caps on the ports are tight.
Crankcase Heater(s)- Crankcase heaters are ener-
gized as long as there is power to the unit and the compressor is
not operating.
IMPORTANT: Unit power must be on for 24 hours prior to I
start-up. Otherwise, damage to compressor may result. I
Compressor Phasing
hnproper wiring will cause compressor stoppage and possi-
ble unit &image. Correct wiring by switching leads as indi-
cated below.
On 3-phase units, it is important to be certain the compres-
sors are rotating in the proper direction. To determine whether
or not compressors are rotating in the proper direction, use a
phase-rotation meter on the unit input power to check for
L I -L2-L3 or clockwise rotation. If the compressor is rotating in
the wrong direction, the suction pressure will not diop and the
discharge pressure will not rise.
NOTE: Indoor or outdoor fan rotation direction may not
indicate proper input power phase sequence, as some 3-phase
units use single-phase fan motors. Check fan rotation where
applicable.
To correct the wrong compressor rotation direction, perform
the following procedure:
1. Turn off power to the unit and lock out the power.
2. Switch any two of the incoming unit power leads.
3. Turn on power to the unit.
4. Verify corrected compressor rotation and fan rotation
where applicable.
Internal Wiring- Check all electric_d connections in
unit control boxes; tighten as required.
Evaporator Fan- Fan belt and vmiable pulleys are
factory-inst;dledi See Tables 6-12 for fan performance data. Be
sure that fans rotate in the proper direction. See Table 13 for air
quantity limits. See Table 14 for evaporator fan motor specifi-
cations. See Table 15 for fan rpm at v;uious motor pulley set-
tings. See Table 16 for electric resistance heater &_ta. See
Tables 17 and 18 for accessory/FIOP static pressure.To alter
fan performance, see Evaporator Fan Performance Adjustment
section on page 44.
Condenser Fans and Motors -- Condenser fans and
motors _u'e factory set. Refer to Condenser-Fan Adjustment
section (page 45) as required.
Return-Air Filters- Check that correct filters are in-
stalled in filter tracks (see Table 1). Do not operate unit without
return-air filters.
NOTE: For units with 4-in. filter option, units ;ue shipped with
standard 2-in. filteLs. To install 4-in. filters, the filter spacers
must be removed.
Outdoor-Air Inlet Screens --Outdoor-air inlet screens
must be in place before operating unit.
26
AIRFLOW
(Cfm)
35O0
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
Table 6 -- Fan Performance -- 50HJ020 Vertical Discharge Units*
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
423 522 0.60 521 715 0.82 605 906 1.04 679 1093 1.26 747 1278 1.47
454 675 0.78 545 884 1.02 625 1093 1.26 697 1299 1.49 762 1502 1.73
487 859 0.99 572 1082 1.24 648 1307 1.50 717 1529 1.76 780 1750 2.01
522 1077 1.24 601 1311 1.51 673 1550 1.78 739 1789 2.06 800 2026 2.33
559 1330 1.53 632 1573 1.81 700 1826 2.10 763 2080 2.39 822 2332 2,68
598 1621 1.86 664 1873 2.15 729 2137 2.46 789 2405 2.77 846 2671 3,07
637 1953 2.25 698 2212 2.54 759 2486 2.86 817 2766 3.18 871 3046 3,50
677 2327 2.68 734 2593 2.98 791 2876 3.31 846 3167 3.64 898 3459 3,98
718 2745 3.16 770 3018 3.47 824 3309 3.81 876 3609 4.15 926 3913 4.50
759 3209 3.69 808 3489 4.01 858 3787 4.36 907 4095 4.71 956 4410 5,07
801 3722 4.28 846 4007 4.61 893 4311 4.96 940 4628 5.32 986 4952 5.69
AIRFLOW
(Of m)
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
LEGEND
Bhp -- Brake Horsepower Input to Fan
Watts -- Input Watts to Motor
*Motor drive ranges:
Low Range: Not Used
Mid-Low Range: 647-886 (208/230 and 460-v), 810-1072 (575-v)
Mid-High Range: 897-1139 (208/230 and 460-v). 873-1108 (575-v)
High Range: 1078-1274
All other rpms require field-supplied drive.
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
810 1461 1.68 868 1642 1.89 923 1821 2.09 975 1999 2.30 1024 2176 2.50
823 1703 1.96 880 1902 2.19 934 2100 2.42 985 2296 2.64 1034 2490 2.86
839 1969 2.26 894 2185 2.51 947 2400 2.76 997 2613 3.01 1045 2826 3.25
857 2261 2.60 911 2494 2.87 962 2726 3.14 1011 2956 3.40 1058 3185 3.66
877 2583 2.97 930 2832 3.26 979 3080 3.54 1027 3326 3.83 1073 3570 4.11
899 2937 3.38 950 3202 3.68 999 3465 3.98 1045 3726 4.29 1090 3986 4.58
923 3327 3.83 972 3606 4.15 1020 3883 4.47 1065 4159 4.78 1108 4434 5.10
948 3753 4.32 996 4045 4.65 1042 4337 4.99 1086 4627 5.32 1128 4917 5.65
975 4219 4.85 1021 4525 5.20 1066 4829 5.55 1109 5134 5.90 1150 5436 6.25
1002 4727 5.44 1047 5045 5.80 1091 5362 6.17 1133 5680 6.53 1173 5995 6.90
1031 5280 6.07 1075 5609 6.45 1117 5938 6.83 1158 6268 7.21 1197 6596 7.59
NOTES:
1. Maximum continuous bhp is:
Low Range: Not Used
Mid-Low Range: 4.25 (208/230 and 460-v), 3.45 (575-v)
Mid-High Range: 5.75
High Range: 8.63
2. See below for general fan performance notes.
GENERAL FAN PERFORMANCE NOTES
NOTES: result in nuisance tripping or premature motor failure. Unit war-
1. Values include losses for filters, unit casing, and wet coils. See ranty will not be affected. See Evaporator-Fan Motor Perfor-
Tables 17 and 18 for accessory/factory-installed option static mance in Table 14 on page 33 for additional information.
pressure information. 3. Use of a field-supplied motor may affect wire sizing. Contact
2. Extensive motor and electrical testing on these units ensures your Carrier representative for details.
that the full range of the motor can be utilized with confidence. 4. Interpolation is permissible. Do not extrapolate.
Using the fan motors up to the wattage ratings shown will not
27
Table 7 -- Fan Performance -- 50HJ024 Vertical Discharge Units*
AIRFLOW
(Cfm)
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Wa_s Bhp
533 1106 1.27 611 1342 1.54 682 1582 1.82 748 1822 2.10 808 2059 2.37
571 1366 1.57 643 1613 1.86 711 1867 2.15 773 2121 2.44 832 2374 2.73
610 1666 1.92 676 1922 2.21 740 2188 2.52 800 2456 2.82 857 2724 3.13
650 2007 2.31 712 2271 2.61 772 2548 2.93 829 2829 3.25 883 3110 3.58
691 2391 2.75 748 2663 3.06 805 2949 3.39 859 3242 3.73 911 3536 4.07
732 2820 3.24 786 3100 3.57 839 3395 3.91 891 3698 4.25 941 4004 4.61
775 3297 3.79 824 3585 4.12 874 3887 4.47 924 4200 4.83 972 4516 5.19
817 3823 4.40 863 4118 4.74 911 4428 5.09 958 4749 5.46 1003 5075 5.84
860 4400 5.06 904 4702 5.41 948 5019 5.77 993 5347 6.15 1036 5683 6.54
903 5031 5.79 944 5339 6.14 986 5663 6.51 1028 5998 6.90 1070 6343 7.29
947 5715 6.57 985 6030 6.93 1025 6360 7.32 1065 6703 7.71 1105 7055 8.11
AIRFLOW
(Cfm)
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
865 2294 2.64 918 2527 2.91 969 2760 3.17 1018 2990 3.44 1065 3219 3.70
886 2625 3.02 938 2875 3.31 988 3123 3.59 1035 3369 3.87 1081 3614 4.16
910 2990 3.44 960 3254 3.74 1008 3518 4.05 1054 3779 4.35 1099 4040 4.65
935 3391 3.90 984 3670 4.22 1030 3948 4.54 1075 4224 4.86 1118 4499 5.18
961 3830 4.40 1008 4123 4.74 1054 4415 5.08 1098 4706 5.41 1140 4996 5.75
989 4311 4.96 1035 4617 5.31 1079 4922 5.66 1122 5227 6.01 1163 5530 6.36
1018 4835 5.56 1062 5153 5.93 1105 5472 6.29 1147 5790 6.66 1187 6106 7.02
1048 5405 6.22 1091 5735 6.60 1133 6065 6.98 1173 6396 7.36 1212 6725 7.73
1079 6022 6.93 1121 6364 7.32 1161 6706 7.71 1201 7048 8.11 1239 7390 8.50
1112 6691 7.70 1152 7042 8.10 1191 7395 8.51 1229 7749 8.91 1266 8102 9.32
1145 7412 8.52 1184 7773 8.94 1222 8135 9.36 1259 8500 9.78 1295 8864 10.20
LEGEND
Bhp --Brake Horsepower Input to Fan
Watts -- Input Watts to Motor
*Motor drive ranges:
Low Range: 685-939 (208/230 and 460-v), 751-954 (575-v)
Mid-Low Range: 949-1206
Mid-High Range: 941-1176
High Range: 1014-1297
All other rpms require field-supplied drive.
NOTES:
1. Maximum continuous bhp is:
Low Range: 4.25 (208/230 and 460-v), 5.75 (575-v)
Mid-Low Range: 5.75
Mid-High Range: 8.63
High Range: 11.50
2. See page 27 for general fan performance notes.
28
Table 8 -- Fan Performance -- 50HJ028 Vertical Discharge Units*
AIRFLOW
(Cfm)
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
734 2384 2.74 752 2482 2.85 803 2,752 3.16 848 2,998 3.45 891 3,250 3.74
728 2506 2.88 792 2911 3.35 844 3,220 3.70 887 3,484 4.01 928 3,742 4.30
746 2738 3.15 831 3375 3.88 884 3,734 4.29 927 4,023 4.63 966 4,293 4.94
786 3148 3.62 869 3868 4.45 925 4,292 4.94 968 4,612 5.30 1006 4,901 5.64
827 3611 4.15 905 4384 5.04 964 4,891 5.63 1008 5,251 6.04 1046 5,564 6.40
870 4125 4.74 940 4921 5.66 1003 5,529 6.36 1049 5,939 6.83 1086 6,281 7.22
913 4691 5.40 975 5480 6.30 1042 6,202 7.13 1089 6,674 7.68 1127 7,053 8.11
957 5312 6.11 1010 6073 6.98 1079 6,906 7.94 1128 7,453 8.57 1167 7,876 9.06
1002 5988 6.89 1047 6715 7.72 1115 7,635 8.78 1167 8,275 9.52 1207 8,751 10.06
1047 6719 7.73 1086 7416 8.53 1150 8,388 9.65 1205 9,133 10.50 1247 9,674 11.13
1092 7507 8.63 1126 8180 9.41 1185 9,163 10.54 1242 10,025 11.53 1286 10,642 12.24
1137 8356 9.61 1168 9009 10.36 1220 9,975 11.47 1278 10,945 12.59 1325 11,654 13.40
1182 9264 10.65 1210 9903 11.39 1256 10,835 12.46 1314 11,891 13.68 -- -- --
AIRFLOW
(Cfm)
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
934 3,521 4.05 978 3,822 4.40 1023 4,160 4.78 1071 4,540 5.22 1119 4,961 5.71
967 4,010 4.61 1007 4,297 4.94 1048 4,612 5.30 1090 4,960 5.70 1134 5344 6.15
1003 4,565 5.25 1040 4,847 5.57 1078 5,148 5.92 1116 5,474 6.30 1155 5,830 6.71
1041 5,181 5.96 1076 5,465 6.29 1111 5,762 6.63 1146 6,076 6.99 1181 6,412 7.37
1081 5,859 6.74 1114 6,150 7.07 1147 6,448 7.42 1179 6,756 7.77 1212 7,081 8.14
1121 6,595 7.59 1153 6,899 7.93 1184 7,202 8.28 1215 7,512 8.64 1246 7,832 9.01
1161 7,390 8.50 1193 7,710 8.87 1223 8,025 9.23 1253 8,340 9.59 1282 8,660 9.96
1202 8,244 9.48 1233 8,584 9.87 1263 8,913 10.25 1291 9,237 10.62 1319 9,563 11.00
1242 9,154 10.53 1273 9,519 10.95 1303 9,866 11.35 1331 10,203 11.73 1358 10,537 12.12
1282 10,118 11.64 1314 10,514 12.09 1343 10,884 12.52 1371 11,237 12.92 1397 11,584 13.32
1322 11,136 12.81 1354 11,568 13.30 1384 11,964 13.76 ......
LEGEND
Bhp -- Brake Horsepower Input to Fan
Watts -- Input Watts to Motor
*Motor drive ranges:
Low Range: 687-873
Mid-Low Range: 805-1007
Mid-High Range: 941-1176
High Range: 1014-1297
All other rpms require field-supplied drive.
NOTES:
1.Maximum continuous bhp is:
Low Range: 5.75
Mid-Low Range: 5.75
Mid-High Range: 8.63
High Range: 11.50
2.See page 27 for general fan performance notes.
29
AIRFLOW
(Of m)
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
Table 9 -- Fan Performance -- 50HJ020 Horizontal Discharge Units*
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
445 546 0.63 526 712 0.82 603 892 1.03 681 1102 1.27 761 1346 1.55
484 718 0.83 559 896 1,03 627 1079 1.24 694 1280 1.47 763 1505 1.73
524 923 1.06 596 1116 1.28 658 1308 1.50 717 1508 1.73 777 1724 1.98
566 1166 1.34 634 1373 1,58 692 1576 1.81 747 1781 2,05 800 1996 2.30
608 1450 1.67 672 1667 1,92 729 1884 2.17 780 2099 2,41 829 2318 2.67
651 1777 2.04 712 2002 2,30 766 2232 2.57 815 2459 2,83 862 2686 3.09
695 2152 2.47 753 2381 2,74 805 2623 3.02 852 2863 3,29 897 3100 3.57
740 2576 2.96 794 2807 3,23 844 3059 3.52 890 3312 3,81 933 3561 4.10
785 3051 3.51 836 3282 3.77 885 3544 4.08 929 3807 4,38 971 4069 4.68
831 3581 4.12 878 3810 4,38 925 4077 4.69 969 4352 5,01 1009 4625 5.32
878 4167 4.79 922 4394 5.05 966 4664 5.36 1008 4948 5.69 1048 5233 6.02
AIRFLOW
(Of m)
35O0
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
LEGEND
Bhp --Brake Horsepower Input to Fan
Watts -- Input Watts to Motor
*Motor drive ranges:
Low Range: Not Used
Mid-Low Range: 647-886 (208/230 and 460-v), 810-1072 (575-v)
Mid-High Range: 897-1139 (208/230 and 460-v), 873-1108 (575-v)
High Range: 1078-1274
All other rpms require field-supplied drive.
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2,0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
833 1759 2.02 ............
838 1961 2,26 900 2223 2.56 962 2507 2,88 ......
854 2226 2.56 909 2473 2.84 964 2740 3.15 1020 3029 3.48 -- -- --
878 2546 2.93 927 2787 3.21 976 3042 3.50 1026 3315 3.81 1077 3606 4.15
907 2918 3.36 952 3158 3.63 996 3408 3.92 1041 3672 4.22 1087 3950 4.54
939 3339 3.84 981 3583 4.12 1022 3834 4.41 1063 4094 4.71 1105 4364 5.02
974 3809 4.38 1013 4059 4.67 1052 4314 4.96 1090 4575 5.26 1128 4843 5.57
1010 4328 4.98 1047 4587 5.28 1084 4848 5.58 1120 5112 5.88 1156 5382 6.19
1047 4896 5.63 1083 5165 5.94 1118 5435 6.25 1153 5706 6.56 1187 5980 6.88
1085 5515 6.34 1120 5795 6.66 1154 6074 6.99 1187 6353 7.31 1220 6634 7.63
NOTES:
1. Maximum continuous bhp is:
Low Range: Not Used
Mid-Low Range: 4.25 (208/230 and 460-v), 3.45 (575-v)
Mid-High Range: 5.75
High Range: 8.63
2. See page 27 for general fan performance notes.
30
Table 10- Fan Performance- 50HJ024 Horizontal Discharge Units*
AIRFLOW
(Cfm)
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0,6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Wat_ Bhp
575 1193 1.37 642 1400 1.61 700 1603 1.84 754 1810 2.08 808 2028 2.33
619 1483 1.71 682 1702 1.96 737 1918 2.21 788 2134 2.45 837 2355 2.71
663 1817 2.09 723 2048 2.35 776 2276 2.62 825 2503 2.88 871 2731 3.14
708 2198 2.53 765 2435 2.80 816 2677 3.08 863 2916 3.35 906 3155 3.63
753 2629 3.02 807 2871 3.30 857 3125 3.59 902 3377 3.88 944 3626 4.17
800 3112 3.58 850 3357 3.86 898 3621 4.16 942 3885 4.47 982 4146 4.77
847 3650 4.20 894 3897 4.48 940 4169 4.80 982 4445 5.11 1022 4717 5.43
894 4244 4.88 939 4491 5.17 982 4770 5.49 1024 5056 5.82 1062 5340 6.14
941 4896 5.63 983 5145 5.92 1025 5428 6.24 1065 5723 6.58 1103 6018 6.92
989 5610 6.45 1029 5858 6.74 1069 6145 7.07 1108 6447 7.41 1144 6753 7.77
1037 6386 7.34 1075 6634 7.63 1113 6923 7.96 1150 7231 8.32 1186 7546 8.68
AIRFLOW
(Cfm)
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1,2 1,4 1,6 1.8 2,0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
862 2260 2.60 917 2510 2.89 972 2781 3.20 1028 3073 3.53 1084 3384 3.89
886 2586 2.97 935 2829 3.25 985 3089 3.55 1035 3365 3.87 1086 3660 4.21
916 2965 3.41 960 3207 3.69 1005 3461 3.98 1050 3728 4.29 1096 4009 4.61
949 3395 3.90 990 3641 4.19 1032 3894 4.48 1073 4157 4.78 1114 4430 5.10
984 3875 4.46 1023 4127 4.75 1062 4383 5.04 1100 4647 5.34 1139 4918 5.66
1021 4406 5.07 1059 4666 5.37 1095 4928 5.67 1131 5195 5.98 1167 5468 6.29
1059 4988 5.74 1095 6258 6.05 1130 5528 6.36 1165 5800 6.67 1199 6077 6.99
1099 6623 6.47 1133 6903 6.79 1167 6182 7.11 1200 6463 7.43 1232 6745 7.76
1138 6312 7.26 1172 6603 7.59 1205 6893 7.93 1237 7182 8.26 1268 7472 8.59
1179 7057 8.12 1212 7359 8.46 1244 7660 8.81 1276 7959 9.15 1305 8258 9.60
1220 7860 9.04 1282 8174 9.40 1283 8485 9.76 1313 8794 10.11 1342 9103 10.47
LEGEND
Bhp -- Brake Horsepower Input to Fan
Watts -- Input Watts to Motor
*Motor drive ranges:
Low Range: 685-939 (208/230 and 460-v), 751-954 (575-v)
Mid-Low Range: 949-1206
Mid-High Range: 941-1176
High Range: 1014-1297
All other rpms require field-supplied drive.
NOTES:
1. Maximum continuous bhp is:
Low Range: 4.25 (208/230 and 460-v), 5.75 (575-v)
Mid-Low Range: 5.75
Mid-High Range: 8.63
High Range: 11.50
2. See page 27 for general fan performance notes.
3!
Table 11 -- Fan Performance -- 50HJ028 Horizontal Discharge Units*
AIRFLOW
(Cfm)
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
759 2,517 2.89 804 2,753 3.17 844 2,975 3.42 883 3,202 3.68 922 3,445 3.96
810 3,020 3.47 853 3,274 3.77 891 3,509 4.04 928 3,743 4.30 964 3,986 4.58
862 3,581 4.12 903 3,856 4.43 939 4,105 4.72 974 4,348 5.00 1008 4,596 5.29
913 4,206 4.84 953 4,500 5.18 988 4,765 5.48 1021 5,019 5.77 1053 5,274 6.07
965 4,894 5.63 1003 5,209 5.99 1037 5,491 6.32 1069 5,758 6.62 1100 6,022 6.93
1017 5,651 6.50 1054 5,988 6.89 1087 6,285 7.23 1118 6,567 7.55 1147 6,841 7.87
1069 6,477 7.45 1105 6,834 7.86 1137 7,150 8.22 1167 7,446 8.56 1195 7,733 8.89
1121 7,376 8.48 1156 7,755 8.92 1187 8,089 9.30 1216 8,400 9.66 1243 8,699 10.01
1173 8,350 9.60 1207 8,751 10.06 1238 9,103 10.47 1266 9,430 10.85 1292 9,744 11.21
1226 9,401 10.81 1259 9,823 11.30 1288 10,194 11.72 1316 10,538 12.12 1342 10,866 12.50
1278 10,532 12.11 1310 10,975 12.62 1339 11,366 13.07 1366 11,726 13.49 -- -- --
1331 11,745 13.51 ............
AIRFLOW
(Cfm)
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
12,500
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
962 3,710 4.27 1003 4,005 4.61 1045 4,334 4.98 1090 4,701 5.41 1135 5,103 5.87
1000 4,245 4.88 1037 4,527 5.21 1075 4,836 5.56 1115 5,174 5.95 1155 5,547 6.38
1041 4,854 5.58 1075 5,129 5.90 1110 5,424 6.24 1145 5,744 6.61 1182 6,091 7.01
1085 5,535 6.37 1116 5,808 6.68 1148 6,096 7.01 1180 6,403 7.36 1214 6,733 7.74
1129 6,289 7.23 1159 6,563 7.55 1189 6,849 7.88 1219 7,149 8.22 1249 7,467 8.59
1175 7,115 8.18 1204 7,394 8.50 1232 7,681 8.83 1260 7,978 9.18 1288 8,289 9.53
1222 8,016 9.22 1249 8,301 9.55 1276 8,591 9.88 1302 8,890 10.22 1329 9,198 10.58
1270 8,993 10.34 1296 9,286 10.68 1321 9,582 11.02 1346 9,884 11.37 1371 10,193 11.72
1318 10,048 11.56 1343 10,351 11.90 1367 10,655 12.25 1391 10,960 12.61 -- -- --
1366 11,183 12.86 1390 11,496 13.22 .........
LEGEND
Bhp --Brake Horsepower Input to Fan
Watts -- Input Watts to Motor
*Motor drive ranges:
Low Range: 687-873
Mid-Low Range: 805-1007
Mid-High Range: 941-1176
High Range: 1014-1297
All other rpms require field-supplied drive.
NOTES:
1. Maximum continuous bhp is:
Low Range: 5.75
Mid-Low Range: 5.75
Mid-High Range: 8.63
High Range: 11.50
2. See page 27 for general fan performance notes.
Table 12- Power Exhaust Fan Performance
AIRFLOW
(Cfm)
3250
3350
3450
3550
3650
3750
3850
3950
4050
4250
4450
4650
4850
5050
5250
5450
5650
5850
LEGEND
Bhp -- Brake Horsepower
LOW SPEED
208 V230,460,575 V
ESP Bhp Watts ESP Bhp Watts
0.32 1.41 1580 0.70 1.49 1670
0.23 1.44 1610 0.63 1.52 1700
0.17 1.46 1635 0.59 1.55 1730
0.13 1.47 1645 0.56 1.56 1745
0.09 1.49 1665 0.53 1.58 1765
0.51 1.60 1790
0.48 1.62 1810
0.45 1.64 1835
0.40 1.67 1865
MEDIUM SPEED
208 V 230,460,575 V
ESP Bhp Watts ESP Bhp Watts
0.60 1.51 1690 0.82 1.62 1810
0.55 1.54 1720 0.78 1.64 1840
0.49 1.56 1750 0.73 1.67 1870
0.43 1.59 1780 0.68 1.70 1900
0.39 1.62 1815 0.64 1.72 1930
0.33 1.64 1835 0.59 1.74 1950
0.27 1.66 1860 0.54 1.76 1975
0.22 1.68 1885 0.49 1.79 2000
0.17 1.74 1945 0.40 1.84 2060
0.00 1.79 2005 0.30 1.89 2115
0.22 1.94 2170
0.16 1.98 2215
0.12 2.02 2260
HIGH SPEED
208 V 230,460,575 V
ESP Bhp Watts ESP Bhp Watts
0.60 1.85 2070 0.73 1.99 2230
0.56 1.87 2095 0.69 2.01 2255
0.51 1.89 2120 0.65 2.04 2280
0.41 1.92 2145 0.56 2.06 2310
0.31 1.97 2205 0.47 2.12 2370
0.20 2.04 2280 0.37 2.19 2450
0.11 2.09 2335 0.30 2.24 2505
0.04 2.13 2385 0.23 2.28 2555
-- 0.17 2.33 2610
-- 0.12 2.38 2665
-- 0.07 2.40 2690
-- 0.04 2.42 2710
ESP -- External Static Pressure (in. wg)
32
50HJ
UNIT
SIZE
020
024
028
Table 13 -- Operation Air Quantity Limits
COOLING
Minimum Cfm
5,400
5,500
6,000
Maximum Cfm
9,000
10,000
11,500
ELECTRIC HEAT
High Heat (75 kW)
Medium Heat (50 kW)
Low Heat (25 kW)
High Heat (75 kW)
Medium Heat (50 kW)
Low Heat (25 kW)
High Heat (75 kW)
Medium Heat (50 kW)
Low Heat (25 kW)
ELECTRIC HEAT
(Vertical)
MINIMUM CFM
4,500
3,750
3,750
4,500
3,750
3,750
4,500
3,750
3,750
ELECTRIC HEAT
(Horizontal)
MINIMUM CFM
5,400
4,800
3,750
5,400
4,800
3,750
5,400
4,800
3,750
5OHJ DRIVE
UNIT SIZE
Low
Mid-Low
Mid-High
High
O2O
Low
Mid-Low
Mid-High
High
LEGEND
Bhp -- Brake Horsepower
N/A -- Not Applicable
P/N -- Part Number
ORIENTATION
Vertical
Vertical
Vertical
Vertical
Horizontal
Horizontal
Horizontal
Horizontal
Table 14 -- Evaporator Fan Motor Specifications
MOTOR
PIN
N/A
N/A
N/A
N/A
HD60FK651
HD60FK651
HD60FK651
HD58DL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD62FL650
HD62FL650
HD62FL650
HD62FL575
N/A
N/A
N/A
N/A
HD60FK651
HD60FK651
HD60FK651
HD58DL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD62FL650
HD62FL650
HD62FL650
HD62FL575
NOMINAL
HP
N/A
N/A
N/A
N/A
3.7
3.7
3.7
3
5
5
5
5
7.5
7.5
7.5
7.5
N/A
N/A
N/A
N/A
3.7
3.7
3.7
3
5
5
5
5
7.5
7.5
7.5
7.5
MAX EFFICIENCY
VOLTAGE WATTS %
208 N/A N/A
230 N/A N/A
460 N/A N/A
575 N/A N/A
208 3698 85.8
230 3698 85.8
460 3698 85.8
575 3149 81.7
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 7267 88.5
230 7267 88.5
460 7267 88.5
575 7267 88.5
208 N/A N/A
230 N/A N/A
460 N/A N/A
575 N/A N/A
208 3698 85.8
230 3698 85.8
460 3698 85.8
575 3149 81.7
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 7267 88.5
230 7267 88.5
460 7267 88.5
575 7267 88.5
MAX MAX MAX
BHP BkW AMPS
N/A N/A N/A
N/A N/A N/A
N/A N/A N/A
N/A N/A N/A
4.25 3.17 10.6
4.25 3.17 9.6
4.25 3.17 4.8
3.45 2.57 3.9
5.75 4.29 16.7
5.75 4.29 15.2
5.75 4.29 7.6
5.75 4.29 6.1
8.63 6.43 24.2
8.63 6.43 22
8.63 6.43 11
8.63 6.43 9
N/A N/A N/A
N/A N/A N/A
N/A N/A N/A
N/A N/A N/A
4.25 3.17 10.6
4.25 3.17 9.6
4.25 3.17 4.8
3.45 2.57 3.9
5.75 4.29 16.7
5.75 4.29 15.2
5.75 4.29 7.6
5.75 4.29 6.1
8.63 6.43 24.2
8.63 6.43 22
8.63 6.43 11
8.63 6.43 9
33
50HJ
UNIT SIZE
O24
028
DRIVE
Low
Mid-Low
Mid-High
High
Low
Mid-Low
Mid-High
High
Low
Mid-Low
Mid-High
High
Low
Mid-Low
Mid-High
High
Table 14 -- Evaporator Fan Motor Specifications (cont)
ORIENTATION
Vertical
Vertical
Vertical
Vertical
Horizontal
Horizontal
Horizontal
Horizontal
Vertical
Vertical
Vertical
Vertical
Horizontal
Horizontal
Horizontal
Horizontal
MOTOR
PIN
HD60FK651
HD60FK651
HD60FK651
HD60FL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD62FL650
HD62FL650
HD62FL650
HD62FL575
HD64FL650
HD64FL650
HD64FL650
HD64FL575
HD60FK651
HD60FK651
HD60FK651
HD60FL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD62FL650
HD62FL650
HD62FL650
HD62FL575
HD64FL650
HD64FL650
HD64FL650
HD64FL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD62FL650
HD62FL650
HD62FL650
HD62FL575
HD64FL650
HD64FL650
HD64FL650
HD64FL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD60FL650
HD60FL650
HD60FL650
HD60FL575
HD62FL650
HD62FL650
HD62FL650
HD62FL575
HD64FL650
HD64FL650
HD64FL650
HD64FL575
NOMINAL
HP
3.7
3.7
3.7
5
5
5
5
5
7.5
7.5
7.5
7.5
10
10
10
10
3.7
3.7
3.7
5
5
5
5
5
7.5
7.5
7.5
7.5
10
10
10
10
5
5
5
5
5
5
5
5
7.5
7.5
7.5
7.5
10
10
10
10
5
5
5
5
5
5
5
5
7.5
7.5
7.5
7.5
10
10
10
10
MAX EFFICIENCY
VOLTAGE WATTS %
208 3698 85.8
230 3698 85.8
460 3698 85.8
575 4900 87.5
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 7267 88.5
230 7267 88.5
460 7267 88.5
575 7267 88.5
208 9582 89.5
230 9582 89.5
460 9582 89.5
575 9582 89.5
208 3698 85.8
230 3698 85.8
460 3698 85.8
575 4900 87.5
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 7267 88.5
230 7267 88.5
460 7267 88.5
575 7267 88.5
208 9582 89.5
230 9582 89.5
460 9582 89.5
575 9582 89.5
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 7267 88.5
230 7267 88.5
460 7267 88.5
575 7267 88.5
208 9582 89.5
230 9582 89.5
460 9582 89.5
575 9582 89.5
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 4900 87.5
230 4900 87.5
460 4900 87.5
575 4900 87.5
208 7267 88.5
230 7267 88.5
460 7267 88.5
575 7267 88.5
208 9582 89.5
230 9582 89.5
460 9582 89.5
575 9582 89.5
MAX MAX
BHP BkW
4.25 3.17
4.25 3.17
4.25 3.17
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
8.63 6.43
8.63 6.43
8.63 6.43
8.63 6.43
11.5 8.58
11.5 8.58
11.5 8.58
11.5 8.58
4.25 3.17
4.25 3.17
4.25 3.17
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
8.63 6.43
8.63 6.43
8.63 6.43
8.63 6.43
11.5 8.58
11.5 8.58
11.5 8.58
11.5 8.58
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
8.63 6.43
8.63 6.43
8.63 6.43
8.63 6.43
11.5 8.58
11.5 8.58
11.5 8.58
11.5 8.58
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
5.75 4.29
8.63 6.43
8.63 6.43
8.63 6.43
8.63 6.43
11.5 8.58
11.5 8.58
11.5 8.58
11.5 8.58
MAX
AMPS
10.6
9.6
4.8
6.1
16.7
15.2
7.6
6.1
24.2
22
11
9
30.8
28
14
11
10.6
9.6
4.8
6.1
16.7
15.2
7.6
6.1
24.2
22
11
9
30.8
28
14
11
16.7
15.2
7.6
6.1
16.7
15.2
7.6
6.1
24.2
22
11
9
30.8
28
14
11
16.7
15.2
7.6
6.1
16.7
15.2
7.6
6.1
24.2
22
11
9
30.8
28
14
11
34
Table 15 -- Fan Rpm and Motor Pulley Settings*
50HJ
UNIT SIZE
020
(230 and 460 volt)
020
(575 volt)
024
(230 and 460 volt)
024
(575 volt)
O28
(all voltages)
RANGE
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
High Range Vertical
Low Range Horizontal
Mid-Low Range Horizontal
Mid-High Range Horizontal
High Range Horizontal
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
High Range Vertical
Low Range Horizontal
Mid-Low Range Horizontal
Mid-High Range Horizontal
High Range Horizontal
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
High Range Vertical
Low Range Horizontal
Mid-Low Range Horizontal
Mid-High Range Horizontal
High Range Horizontal
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
High Range Vertical
Low Range Horizontal
Mid-Low Range Horizontal
Mid-High Range Horizontal
High Range Horizontal
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
High Range Vertical
Low Range Horizontal
Mid-Low Range Horizontal
Mid-High Range Horizontal
High Range Horizontal
MOTOR PULLEY TURNS OPEN
01/2 1 11/2 2 21/2 331/2 4 41/2 5 51/2 6
647 667 687 707 727 747 767 786 806 826 846 866 886
897 917 937 958 978 998 1018 1038 1058 1079 1099 1119 1139
1078 1094 1111 1127 1143 1160 1176 1192 1209 1225 1241 1258 1274
647 667 687 707 727 747 767 786 806 826 846 866 886
897 917 937 958 978 998 1018 1038 1058 1079 1099 1119 1139
1078 1094 1111 1127 1143 1160 1176 1192 1209 1225 1241 1258 1274
810 832 854 876 897 919 941 963 985 1007 1028 1050 1072
873 893 912 932 951 971 991 1010 1030 1049 1069 1088 1108
1078 1094 1111 1127 1143 1160 1176 1192 1209 1225 1241 1258 1274
810 832 854 876 897 919 941 963 985 1007 1028 1050 1072
873 893 912 932 951 971 991 1010 1030 1049 1069 1088 1108
1078 1094 1111 1127 1143 1160 1176 1192 1209 1225 1241 1258 1274
685 706 727 749 770 791 812 833 854 876 897 918 939
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 1206
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 1176
1014 1038 1061 1085 1108 1132 1156 1179 1203 1226 1250 1273 1297
685 706 727 749 770 791 812 833 854 876 897 918 939
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 1206
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 1176
1014 1038 1061 1085 1108 1132 1156 1179 1203 1226 1250 1273 1297
751 768 785 802 819 836 853 869 886 903 920 937 954
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 1206
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 1176
1014 1038 1061 1085 1108 1132 1156 1179 1203 1226 1250 1273 1297
751 768 785 802 819 836 853 869 886 903 920 937 954
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 1206
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 1176
1014 1038 1061 1085 1108 1132 1156 1179 1203 1226 1250 1273 1297
687 703 718 734 749 765 780 796 811 827 842 858 873
805 822 839 856 872 889 906 923 940 957 973 990 1007
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 1176
1014 1038 1061 1085 1108 1132 1156 1179 1203 1226 1250 1273 1297
687 703 718 734 749 765 780 796 811 827 842 858 873
805 822 839 856 872 889 906 923 940 957 973 990 1007
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 1176
1014 1038 1061 1085 1108 1132 1156 1179 1203 1226 1250 1273 1297
*Approximate fan rpm shown.
Table 16- Electric Resistance Heater Data
50HJ
UNIT
SIZE
020,
024,028
HEATER kW HEATER %HEAT
Unit Voltages STAGES PER
208 230 240 460 480 575 600 STAGE
19 23 25 23 25 23 25 2 50/50
38 46 50 46 50 44 48 2 50/50
56 69 75 69 75 72 78 2 50/50
MAXIMUM
STAG ES*
2
2
2
*Maximum number of stages using accessory low-ambient temperature kit or head
and low-ambient temperature kit.
NOTE: Heaters are rated at 208,240, 480, and 600 v.
MINIMUM
Heating Cfm
Cfm L/s
4800 2265
HEATER AMPS
208 230 240 460 480 575 600
52.0 58.0 60.0 29.0 30.0 23.0 24.0
104.0 115.0 120.0 58.0 60.0 44.0 48.0
156.0 173.0 180.0 86.0 90.0 72.0 75.0
_ressure control device
35
Table 17 -- Accessory/FlOP EconoMi$er IV Static Pressure (in. wg)*
I I IoF°I I
COMPONENT 4,000 4,500 5,000 5,500 6,000 6,500 7,000 7,500 8,000
EconoMi$er IV 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10
I I I IcFMI I I
COMPONENT 8,500 9,000 9,500 10,000 10,500 11,000 11,500 12,000
EconoMi$er IV 0.11 0.12 0.13 0.15 0.16 0.17 0.19 0.20
LEGEND
FlOP -- Factory-Installed Option
*The static pressure must be added to external static pressure. The sum and the evaporator entering-air cfm
should then be used in conjunction with the Fan Performance tables to determine blower rpm and watts.
UNIT
50HJ
020,
024,028
Table 18 -- Accessory Electric Heat Static Pressure (in. wg)
Nominal
Unit Cfm Heater Size
Voltages (kW)
25
4,800
5,000
6,000
7,000
208/240-3-60 8,000
9,000
10,000
11,500
4,800
5,000
6,000
7,000
480-3-60 8,000
9,000
10,000
11,500
4,800
5,000
6,000
7,000
575-3-60 8,000
9,000
10,000
11,500
LEGEND
Bhp -- Brake Horsepower
FlOP -- Factory-Installed Option
NOTES:
1. Heaters are rated at 240 v, 480 v, and 600 v.
ELECTRIC HEATERS
Nominal
Pressure Drop Heater Size
(in. wg) (kW)
0.01
0.01
0.02
0.03
0.04
0.05
0.06
0.09
0.01
0.01
0.02
0.03 50
0.04
0.05
0.06
0.09
0.01
0.01
0.02
0.03
0.04
0.05
0.06
0.09
Nominal
Pressure Drop Heater Size
(in. wg) (kW)
0.02
0.02
0.04
0.06
0.08
0.10
0.13
0.18
0.02
0.02
0.04
0.06 75
0.08
0.10
0.13
0.18
0.02
0.02
0.04
0.06
0.08
0.10
0.13
0.18
Pressure Drop
(in. wg)
0.03
0.04
0.06
0.08
0.12
0.15
0.20
0.27
0.03
0.04
0.06
0.08
0.12
0.15
0.20
0.27
0.03
0.04
0.06
0.08
0.12
0.15
0.20
0.27
2. The static pressure must be added to external static pressure.
The sum and the evaporator entering-air cfm should then be
used in conjunction with the Fan Performance table to deter-
mine blower rpm, bhp, and watts.
36
Optional EconoMiSer IV -- See Fig. 20 for EconoMi$er
IV component locations. The optional EconoMi$er IV comes
fi_m the factory fi.dly wiled and assembled. No field wMng or
assembly is required for standard outdoor &-y bulb changeover
operation. Field wiring of accesso Usensors is required for
diffelent operational modes.
ECONOMI$ER IV STANDARD SENSORS
Outdoor Air Temperature (OAT) Sensor -- The outdoor air
temperature sensor (HH57AC074) is a 10 to 20 mA device
used to measure the outdoor-air temperature. The outdoor-air
temperature is used to determine when the EconoMi$er IV can
be used for free cooling. The sensor is factory-installed on the
EconoMiSer IV in the outdoor airstream. See Fig. 21. The op-
erating range of temperature measurement is 40 to 100 E
Supply-Air Temperature (SAT) Sensor -- The supply-air
temperature sensor is a 3 K thermistor located at the outlet of
the indoor fan. See Fig. 21. This sensor is factoly installed. The
operating range of temperature measmement is 0 ° to 158 E
The temperature sensor is a short probe with blue wires
running to it.
Outdoor Air Lockout Sensor -- The Economi$er IV is
equipped with an ambient temperature lockout switch located
in the outdoor airstream which is used to lock out the compres-
sors below a 42 F ambient temperature.
ECONOMISER IV CONTROLLER WIRING AND OPER-
ATIONAL MODES -- Determine the EconoMiSer IV control
mode before set up of the control. Some modes of operation may
require different sensors. Refer to Table 19. The EconoMiSer IV
is supplied fiom the factory with a supply-air temperature
sensor and an outdoor air temperature sensol: This allows for
operation of the EconoMi$er IV with outdoor air dry bulb
changeover control. Additional accessories can be added to
_dlow for different types of changeover control and operation
of the EconoMiSer IV and unit.
Outdoor D UBulb Changeover -- The standard controller is
shipped from the factory configmed for outdoor dry bulb
changeover control. The outdoor air and supply-air temperature
sensors me included as stand_u'd. For this control mode, the out-
door temperature is compaled to an adjustable set point selected
on the control. If the outdoor-air temperatme is above the set
point, the EconoMi$er IV will adjust the outdoor-air dampers to
minimum position. If the outdoor-air temperature is below the
set point, the position of the outdoor-air dalnpel_ will be con-
trolled to provide free cooling using outdoor ail: When in this
mode, the LED next to the free cooling set point potenfiometer
will be on. The changeover temperature set point is controlled
by the free cooling set point potentiometer located on the con-
trol. The sc_de on the potentiometer is A, B, C, and D. See
Fig. 22 for the corresponding temperature changeover values.
Table 19 -- EconoMi$er IV Sensor Usage
ECONOMISER IV WITH SINGLE
APPLICATION ENTHALPY SENSOR
Accessories Required
Outdoor Air Dry Bulb CRTEMPSN002A00*
Differential Dry Bulb (2) CRTEMPSN002A00*
Single Enthalpy None. The single enthalpy sensor is factory installed.
CRENTDIF004A00*Differential Enthalpy
CO2 for DCV Control using a
Wall-Mounted CO2 Sensor
CO2 for DCV Control using a
Duct-Mounted CO2 Sensor
ECONOMI$ER IV WITH OUTDOOR AIR
DRY BULB SENSOR
Accessories Required
None. The outdoor air dry bulb sensor is factory installed.
CRTEMPSN002A00*
HH57AC078
HH57AC078
and
CRENTDIF004A00*
33ZCSENCO2
33ZCSENCO21- _)
and CRCBDiOX005A001-1-
33ZCASPCO2**
33ZCSENC02
33ZCSENCO21-
and CRCBDIOX005A001-1-
33ZCASPCO2**
*CRENTDiF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be
needed for installation.
1-33ZCSENCO2 is an accessory CO2 sensor.
**33ZCASPCO2 is an accessory aspirator box required for duct-mounted applications.
1-1-CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories.
37
DAMPER
ASSEMBLY
WIRE
HARNESS
DAMPER
ACTUATOR
ECONOMIZER
BLOCK OFF
Fig. 20 iEconoMiSer IV Component Locations (Exploded View)
Fig. 21 iSupply-Air Temperature Sensor Location
19
18
17
16-
15
<
E14
13
12
11
10
9
4O
LED _ON
-LED OFF LED ON
LED O_
45 50 55 60 65 70 75 80
DEGREES FAHRENHEIT
LED ON- --
85 90 95 100
Fig. 22 iOutdoor-Air Temperature Changeover
Set Points
38
Differential Dry Bulb Control -- For differentkd cfly bulb
control the stan&u_d outdoor dry bulb sensor is used in conjunc-
tion with an additional accessory c_h_bulb sensor (part number
CRTEMPSN002A00). Tile accessory sensor must be mounted
in the return ail_tream. Wiring is provided in file EconoMi$er
IV wiling h_u'ness. See Fig. 23.
In this mode of operation, the outdoor-air temperature is
compared to the return-air temperature and the lower tempera-
ture airstream is used for cooling. When using this mode of
changeover control, turn file enth_flpy set point potentiometer
fully clockwise to the D setting.
Outdoor Enthalpy Changeover -- For enth_dpy control, acces-
soUenthalpy sensor (p_ut number HH57AC078) is required.
Replace the standmd outdoor @ bulb temperature sensor with
the accessory enthalpy sensor in file same mounting location.
When file outdoor air enthalpy rises above the outdoor enthalpy
changeover set point, the outdoor-air &tmper moves to its mini-
mum position. The outdoor enthalpy changeover set point is set
with the outdoor enth_dpy set point potentiometer on the
EconoMiSer IV controllel: The set points me A, B, C, and D.
See Fig. 24. The factory-installed 620-ohm jumper must be in
place across termin_ds SR and + on the EconoMiSer IV control-
lel: See Fig. 23.
Differential Enthalpy Control -- For differentkd enthalpy
control, the EconoMiSer IV controller uses two enthalpy
sensors (HH57AC078 and CRENTDIF004A00), one in the
outside air and one in the return air duct. The EconoMiSer [V
controller compares file outdoor air enthalpy to the return air
enthalpy to determine EconoMi$er [V use. The controller
selects the lower enthalpy air (return or outdoor) for cooling.
For example, when file outdoor air has a lower enthalpy than
the return ail: the EconoMiSer IV opens to bring in outdoor air
for free cooling.
Replace file standard outside air dry bulb temperature
sensor with the accessory enthalpy sensor in the same mount-
ing location. Mount the return air enth_dpy sensor in the return
air duct. Wiring is provided in the EconoMiSer IV wiring
harness. See Fig. 23. The outdoor enth_dpy changeover set
point is set with the outdoor enthalpy set point potentiometer
on file EconoMi$er IV controllel: When using this mode of
changeover control, turn the enthalpy set point potentiometer
fully clockwise to the D setting. See Fig. 25.
Indoor Air Quality (IAQ) Sensor Input -- The IAQ input
can be used for demand control ventilation control based on the
level of CO2 measured in the space or return air duct.
Mount the optional IAQ sensor according to manufacturer
specifications. The IAQ sensor should be wired to the AQ and
AQI terminals of the controllel: Adjust the DCV (demand
controlled ventilation) potentiometels to correspond to the
DCV voltage output of file indoor air quzdity sensor at the
user-determined set point. See Fig. 26.
If a separate field-supplied transformer is used to power the
IAQ sensor, the sensor must not be grounded or the
EconoMi$er IV control board will be dmnaged.
Exhaust Set Point Adjustment -- The exhaust set point will
determine when the exhaust fan runs based on dmnper position
(if accessory power exhaust is insLdled). The set point is modi-
fied with the Exhaust Fan Set Point (EXH SET) potentiometel:
See Fig. 25. The set point represents the damper position above
which the exhaust fans will be turned on. When there is a c_dl
for exhaust, the EconoMiSer IV controller provides a 45 _+15
second delay before exhaust fan activation to _dlow the damp-
ers to open. This delay allows the damper to reach the appro-
priate position to avoid unnecessmy fan overload.
GRA
BLK
A_.I_BLK-O
-4RA_>Pu-6
PU-B _I_BLU']
-_LU_> _i-S I
PLH ECB I
<_-- -- -RED-N I
-- --RED ---_ BI
-- -BLU-_C)--
IED
-- -GRA@
PLI-IO (_- -REI: ,,i i
I
-p_ _ PL1-9 [_> PLI-12
ORN
_ Pu-l
SAT
LEGEND
IA --Indoor Air
IAQ -- Indoor Air Quality
OA -- Outdoor Air
OAS-- Outdoor-Air Temperature Sensor
PL -- Plug
RAS-- Return-Air Temperature Sensor
SAT -- Supply-Air Temperature Sensor
NMINIMUM
• I
I
..I FPNK_ _ 1_--
1
Tf" I 1
I;i +L L,_U--,&' '-"-'
14 ...........
L _ _I \ Loo_c-Yl I;_-_ _c_iz_
BR _ \ OR_ _ ENA_-E SVTTCH
PL. _D41EN _STALLINO IA ENTHALPY OR
"k ":| RETURN AIR SENSOR REMOVE 6L_O_'_
RED \(_--- RESISTOR _ETWEEN SR+ & _ AN0
_[_ IS BISE_CEO WHEN ACCY CDNNZCT BLU & ORN VIES
DA ENII.IALPYIS INSTALLED
Fig. 23 -- EconoMi$er IV Wiring
39
CONTROL CONTROL POINT
CURVE APPROX. °F (°C)
AT 50% RH
A 73 (23)
B 70/21 )
C 67 (19)
D 63 (17)
85 90 95 100 105 110
(29) (32) (35) (38) (41) (43)
35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110
(2) (4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)
APPROXIMATE DRY BULB TEMPERATURE i°F (°C)
Fig. 24 -- Enthalpy Changeover Set Points
LIMIT
CURVE
EXHAUST
FAN SETPOtNT
LED LIGHTS
WHEN EXHAUST
CONTACT tS MADE
MINIMUM DAMPER
POSITION SETTING
MAXIMUM DAMPER
DEMAND CONTROL
VENTILATION SET POINT
LED LIGHTS WHEN_
DEMAND CONTROL
VENTILATION INPUT
IS ABOVE SET POINT
DEMAND CONTROL
VENTILATION SET POINT
LED LIGHTS WHEN
OUTDOOR AIR IS
SUITABLE FOR
FREE COOLING ENTHALPY
CHANGEOVER SET POINT
Fig. 25 -- EconoMi$er IV Controller Potentiometer
and LED Locations
6000
5000
z
2 4000
3000
z
2000
w
z 1000
<
CO 2 SENSOR MAX RANGE SETTING
+800 ppm
_900 ppm
_1000 ppm
+1100 ppm
23 45678
DAMPER VOLTAGE FOR MAX VENTILATION RATE
Fig. 26 -- 002 Sensor Maximum Range Setting
40
Minimum Position Control -- There is a minimum damper
position potentiometer on the EconoMiSer IV controllel: See
Fig. 25. The minimum dmnper position maintains the mini-
mum airflow into the building during the occupied period.
When using demand ventilation, the minimum damper
position represents the minimum ventilation position for VOC
(volatile organic compounds) ventilation requirements. The
maximum demand ventilation position is used for fully occu-
pied ventilation.
When demand ventilation control is not being used, the
minimum position potentiometer should be used to set the oc-
cupied ventilation position. The maximum demand ventilation
position should be turned fully clockwise.
Adjust the minimum position potentiometer to fdlow the
minimum amount of outdoor air. as required by local codes, to
enter the building. Make minimum position adjustments with
fit least 10° F temperature difference between the outdoor and
return-air temperatures. To determine the minimum position
setting, perfoml the following procedure:
1. Calculate the appropriate mixed air temperature using the
following formula:
OA RA
(To x l-q--if(5-7 + (TR x l-q--if(5-7= TM
To = Outdoor-Air Temperature
OA = Percent of Outdoor Air
TR = Return-Air Telnperature
RA = Percent of Return Air
TM = Mixed-Air Temperature
As an exmnple, if local codes require 10% outdoor air
during occupied conditions, outdoor-air temperature is
60 IF.and return-air temperature is 75 IF.
(60 x. 10) + (75 x .90) = 73.5 F
2. Disconnect the supply-air sensor from terminals T and
TI.
3. Ensure that the factory-installed jumper is in place across
terminals P and PI. If remote damper positioning is being
used, make sure that the terminals are wired according to
Fig. 23 and that the minimum position potentiometer is
turned lully clockwise.
4. Connect 24 vac across terminals TR and TRI.
5. Cmefully adjust the minimum position potentiometer
until file measured mixed-air temperature matches the
caiculated vaiue.
6. Reconnect the supply-air sensor to terminals T and Tl.
Remote control of the EconoMiSer IV dmnper is desirable
when requiring additional temporary ventilation. If a
field-supplied remote potentiometer (Honeywell pfut number
$963B11287 is wired to the EconoMiSer IV controller, the
minimum position of the damper can be controlled from a re-
mote location.
To control the minimum damper position remotely, remove
the factory-installed jumper on the P and PI terminals on the
EconoMiSer IV controllel: Wire the field-supplied potentiome-
ter to the P and PI termimds on file EconoMiSer IV controllel:
See Fig. 23.
Damper Movement -- Damper movement from full open to
full closed (or vice versa) takes up to 21/2 minutes.
Thermostats -- The EconoMi$er IV control works with con-
ventional thermostats that have a YI (cool stage 1), Y2 (cool
stage 27, WI (heat stage 1), W2 (heat stage 27, and G (fan). The
EconoMiSer IV control does not support space temperature
sensors like the T55 or T56. Connections are made at the ther-
mostat terminal connection board located in the main control
box.
Occupancy Control -- The factory default configuration for
the EconoMiSer IV control is occupied mode. Occupied status
is provided by the black jumper from terminal TR to terminal
N. When unoccupied mode is desired, install a field-supplied
timeclock lhnction in place of the jumper between TR and N.
See Fig. 23. When the timeclock contacts are closed, the
EconoMiSer IV control will be in occupied mode. When the
timeclock contacts are open (removing the 24-v signal from
terminal N), the EconoMiSer IV will be in unoccupied mode.
Demand Control Ventilation -- When using the Econo-
MiSer IV for demand control ventilation, there are some equip-
ment selection criteria which should be considered. When
selecting the heat capacity and cool capacity of the equipment,
the maximum ventilation rate must be evfduated for design
conditions. The maximum damper position must be calculated
to provide the desired fresh all:
Typically the maximum ventilation rate will be about 5 to
10% more than the typical cfm required per pel.son, using nor-
mfd outside air design criteria.
A proportional anticipatory strategy should be taken with
the following conditions: a zone with a large area, varied
occupancy, and equipment that cannot exceed the required
ventilation rote fit design conditions. Exceeding file required
ventilation rate means the equipment can condition air at a
maximum ventilation rate that is greater than the required
ventilation rate for maximum occupancy. A proportional-
anticipatory strategy will cause file fresh air supplied to
increase as the room CO2 level increases even though the CO2
set point has not been reached. By the time the CO2 level
reaches the set point, the damper will be fit maximum ventila-
tion and should maintain the set point.
In order to have the CO2 sensor control the economizer
damper in this manner, first determine the damper voltage
output for minimum or base ventilation. Base ventilation is the
ventilation required to remove contaminants during unoccu-
pied periods. The following equation may be used to determine
the percent of outside-air entering the building for a given
damper position. For best results there should be at least a
10 degree difference in outside and return-air temperatures.
OA + (TR x RA
(To x l-q--if(5-7 l-q--if(5-7= TM
To = Outdoor-Air Temperature
OA = Percent of Outdoor Air
TR = Return-Air Temperature
RA = Percent of Return Air
TM = Mixed-Air Temperature
Once base ventilation has been determined, set the mini-
mum damper position potentiometer to the correct position.
The same equation can be used to determine the occupied or
maximum ventilation rote to the building. For exmnple, tin
output of 3.6 volts to the actuator provides a base ventilation
rate of 5% and tm output of 6.7 volts provides the maximum
ventilation rate of 20% (or base plus 15 cfm per person). Use
Fig. 26 to determine the maximum setting of the CO2 sensor.
For example, a 1100 ppm set point relates to a 15 cfin per
person design. Use the 1100 ppm curve on Fig. 26 to find the
point when the CO2 sensor output will be 6.7 volts. Line up the
point on the graph with the left side of the chmt to determine
that the range configuration for the CO2 sensor should be 1800
ppm. The EconoMiSer IV controller will output the 6.7 volts
fi_m the CO2 sensor to the actuator when the COo concentra-
tion in the space is fit 1100 ppm. The DCV set point may be left
fit 2 volts since the CO2 sensor voltage will be ignored by the
EconoMi$er IV controller until it rises above the 3.6 volt
setting of the minimum position potentiometel:
Once the fully occupied damper position has been deter-
mined, set the maximum damper demand control ventilation
potentiometer to this position. Do not set to the maximum
position as this can result in over-ventilation to the space and
potential high-humidity levels.
41
CO.2 Sensor Configuration -- Tile CO2 sensor has preset
standard voltage settings that can be selected anytime after the
sensor is powered up. See Table 20.
Use setting 1 or2 for Carrier equipment. See Table 20.
1. Press Clem" and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appeal:
3. Use the Up/Down button to select the preset numbec See
Table 20.
4. Press Enter to lock in file selection.
5. Press Mode to exit and resume normal operation.
The custom settings of the CO2 sensor can be changed any-
time after the sensor is energized. Follow the steps below to
change the non-standard settings:
1. Press Cletu and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appeal:
3. Use the Up/Down button to toggle to the NONSTD menu
and press Enter.
4. Use the Up/Down button to toggle through each of the
nine vmiables, starting wifll Altitude, until file desired
setting is reached.
5. Press Mode to move through the vmiables.
6. Press Enter to lock in the selection, then press Mode to
continue to the next variable.
Dehumidification of Fresh Air with DCV Control -- Infor-
mation from ASHRAE (American Society of Heating,
Refi'igeration, and Air Conditioning Engineers) indicates that
the largest humidity load on any zone is the fresh air intro-
duced. For some applications, a device such as a 62AQ energy
recovery unit is added to reduce the moisture content of the
fiesh air being brought into the building when the enthalpy is
high. In most cases, the norm_d heating and cooling processes
are more than adequate to remove the humidity loads for most
commercial applications.
If normal rooftop heating and cooling operation is not
adequate for the outdoor humidity level, an energy recovery
and/or a dehumidification option should be considered.
Operating Sequence
COOLING. UNITS WITHOUT ECONOMIZER -- When
the thermostat calls for one stage of cooling, YI and G are en-
ergizedi The indoor-fan conmctor (IFC) and complessor con-
tactor(s) (C.AI and C.BI on three-compressor units or C.AI
only on two-compressor units), and outdoor-fan contactors
(OFCI and OFC2 when outdoor temperature is above FCS
[fan control switch] setting) are energized and the indoor-fan
motol: compressor(s) (A 1and BI on three-compressor units or
A 1 only on two-compressor units), and outdoor fans controlled
by OFCI are sttutedi If the outdoor temperature is above the
setting of the fan control switch, the outdoor fans controlled by
OFC2 are _dso stm-ted.
If more cooling is required, the thermostat will call for a
second stage of cooling, energizing Y2. This will _dlow relay
CRI to energize, which in turn energizes the compressor
contactor (C.CI on three-compressor units or C.BI on
two-compressor units). The second stage compressor (CI on
three-compressor units or B I on two-compressor units is then
started.
HEATING. UNITS WITHOUT ECONOMIZER
NOTE: The 50HJ020-028 units have 2 stages of electric heat.
When the thermostat calls for one stage of heating, Wl is
energized. The themlostat must be configured such that the
blower output (G) is energized when there is a WI call for
heating. The indoor-fan contactor (IFC) and first stage electric
heat contactor(s) me energized and the indoor-fan motol: and
first stage electric heater me started.
If additional heating is required, file thermostat will call for
a second stage of heating, energizing W2. This will energize
the second stage of electric heat.
COOLING. UNITS WITH ECONOMISER IV -- When free
cooling is not available, the compressol_ will be controlled by
the zone themlostat. When free cooling is available, the
outdoor-air damper is modulated by the EconoMi$er IV con-
trol to provide a 50 to 55 F mixed-air temperature into the zone.
As the mixed-air temperature fluctuates above 55 or below 50
K the dampel_ will be modulated (open or close) to bring the
mixed-air temperatme back within control.
Table 20 -- 002 Sensor Standard Settings
ANALOG
OUTPUT
SETTING
1
2
3
4
5
6
7
8
EQUIPMENT
Interface w/Standard
Building Control System
Economizer
Health & Safety
9 Parking/Air Intakes/
Loading Docks
LEGEND
ppm -- Parts Per Million
OUTPUT
Proportional
Proportional
Exponential
Proportional
Proportional
Exponential
Exponential
Proportional
Proportional
VENTILATION
RATE
(ofm/Person)
Any
Any
Any
15
20
15
20
0-10V
4-20 mA
2-10V
7-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
CO2
CONTROLRANGE
(ppm)
0-2000
0-2000
0-2000
0-1100
0- 900
0-1100
0- 900
0-9999
0-2000
OPTIONAL
RELAY SETPOINT
(ppm)
1000
1000
1100
1100
900
1100
900
5000
700
RELAY
HYSTERESIS
(ppm)
50
50
50
50
50
50
50
500
50
42
Above 50 F supply-air temperature, the dmnpers will modu-
late from 100% open to the minimum open position. From 50 F
to 45 F supply-air temperature, the &Lmpers will maintain at
the minimum open position. Below 45 F the dampers will be
completely shut. As the supply-air temperature rises, the damp-
ers will come back open to the minimum open position once
the supply-air temperature nses to 48 E
If optional power exhaust is installed, as the outdoor-air
damper opens and closes, the power exhaust fans will be ener-
gized and deenergized.
If field-installed accessory CO2 sensors are connected to the
EconoMiSer IV control, a demand controlled ventilation strate-
gy will begin to operate. As the CO2 level in the zone increases
above the CO2 set point, the minimum position of the &_mper
will be increased proportionally. As the CO2 level decreases
because of the increase in fresh aik the outdoo>air &tmper will
be proportionally closed.
For EconoMi$er IV operation, there must be a thermostat
call for the fan (G). This will move the damper to its minimum
position.
When the EconoMi$er IV control is in the occupied mode
and a call for cooling exists (YI on the thermostat), the control
will first check for indoor fan operation. If the fan is not on,
then cooling will not be activated. If the fan is on, then the
control will open the EconoMi$er IV dmnper to the minimum
position.
Damper movement from full closed to full open (or vice
veLsa) will take between 11/2and 21/2 minutes.
If free cooling can be used as determined from the appropri-
ate changeover command (switch, din bulb, enthalpy curve,
differential dry bulb, or differential enthalpy), then the control
will modulate the dampeLs open to maintain the mixed air tem-
perature set point at 50 to 55 E
If there is a further demand for cooling (cooling second
stage -- Y2 is energized), then the control will bring on
compressor stage 1 to maintain the mixed-air temperature set
point. The EconoMiSer IV &unper will be open at maximum
position. EconoMiSer IV operation is limited to a single
compressoE
HEATING, UNITS WITH ECONOMI$ER IV -- When the
room temperature calls for heat, the heating controls am ener-
gized as described in the Heating, Units Without Economizer
section. The IFM is energized and the EconoMiSer IV damper
modulates to the minimum position. When the thermostat is
satisfied, the damper modulates closed.
SERVICE
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
Cleaning -- Inspect unit interior at beginning of each heat-
ing and cooling season and as operating conditions require. Re-
move unit top panel and/or side panels for access to unit interioc
EVAPORATOR COIL -- Clean as required with commercial
coil cleanel:
CONDENSER COIL--Clean condenser coil annually and
as required by location and outdoo>air conditions. Inspect coil
monthly; clean as required.
CONDENSATE DRAIN -- Check and clean each year at the
start of the cooling season. In winter, keep diains and traps diN.
An access panel is located above the condensate connection to
allow easy clean out of the condensate pan. The first time the
panel is removed, the insulation behind the access panel will
need to be cut away. Carefully cut the insulation with a knife or
blade on three sides so the insulation can be folded out of the
way during cleaning. Be cmeful not to damage components be-
hind the insulation while cutting. Once cleaning is completed,
fold the insulation back into place and secure the access panel
in the original position.
FILTERS -- Clean or replace at stm-tof each heating and cool-
ing season, or more often if operating conditions require. Refer
to Table 1 for type and size.
OUTDOOR-AIR INLET SCREENS -- Clean screens with
steam or hot water grada mild detergent. Do not use throwaway
filters in place of screens. See Table 1 for quantity and size.
Lubrication
COMPRESSORS -- Each compressor is chmged with the cor-
lect mnount of oil at the factory. Conventiomd white oil (Zerol
150T or Sontex SA32) isused. White oil is compatible with 3GS
oil, and 3GS oil may be used if the addition ofoil is required. See
compressor nmneplate for origimd oil chmge. Oil mchmge
amount is shown in Table 1.When a compressor is exchanged in
the field it is possible that a major portion of the oil from the m-
placed compressor may still be in thesystem. While this will not
affect the reliability of the replacement compmssol, the extra oil
will add rotor drag and increase power usage. To remove this ex-
cess oil, an access v_dvemay be added to the lower portion of the
suction line at the inlet of the compressol: The compressor
should then be mn for 10 minutes, shut down and the access
valve opened until no oil flows. This should be repeated twice to
make sure the proper oil level has been achieved.
FAN SHAFT BEARINGS -- Lubricate betuings at least ev-
eU6 months with suitable bearing grease. Typical lubricants
me given below:
MANUFACTURER ]LUBRICANT
Texaco Regal AFB-2*
Mobil Mobilplex EP No. 1
Sunoco Prestige 42
Texaco Multifak 2
*Preferred lubricant because it contains rust and oxidation inhibitors.
CONDENSER AND EVAPORATOR-FAN MOTOR
BEARINGS- The condenser and evaporator-fan motors
have permanently sealed bearings, so no field lubrication is
necessary.
Evaporator Fan Service and Replacement -- The
50HJ units feature a slide-out fan deck for easy servicing of the
indoor-fan motor, pulleys, belt, and bearings. To service com-
ponents in this section, perform the following procedure:
1. Shut offunit power supply.
2. Open the fan section access panel.
3. Remove three no. 10 screws at front of slide-out fan deck.
Save screws. See Fig. 27.
4. Disconnect the electrical plugs and wires connected to the
slide-out fan deck (evaporator fan plug, supply air ther-
mistor, and fan status switch, if installed). Wires may be
&_maged if not disengaged.
5. Fan deck can now be slid out to access serviceable
components.
DO NOT SLIDE FAN DECK OUT PAST THE STOP
BRACKET. [f further access is required, the fan deck must
be suppolled. Make sum plugs and wiring are not pinched
between fan housing and unit center post. Damage to unit
may result.
43
6. Toreplacefandecktooperatingposition,slidefandeck
backintotheunit.Securewiththethreeno.10screws
removedinStep3.
7. Re-attachelectricalplugsandwires.
8. Closefansectionaccessdoor. FAN
9. Restore power to unit. PULLEY"
Evaporator Fan Performance Adjustment
(Fig. 27 and 28) -- Fan motor pulleys are factoq set
for speed shown in Table 1.
To change fan speeds:
1. Shut off unit power supply.
2. Ix)osen nuts on the 4 caniage bolts in file mounting base.
Using adjusting bolts and plate, slide motor and remove
belt.
3. Ix_osen movable-pulley flange setsclew (see Fig. 28).
4. Screw movable flange toward fixed flange to increase
speed and away fiom fixed flange to decrease speed. In-
cleasing fan speed increases load on motol: Do not ex-
ceed maximum speed specified in Table 1.
See Table 13 for air quantity limits.
5. Set movable flange at nearest keyway of pulley hub and
tighten setscrew. (See 321ble 1 for speed change for each
full turn of pulley flange.)
6. Replace and tighten belts (see Belt Tension Adjustment
section below).
7. Restore power to unit. PULLEY
To align fan and motor pulleys:
1. Ix_osen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor fi_m
mounting plate.
4. Restore power to unit. PULLEY
Belt Tension Adjustment -- Toadjustbelt tension:
1. Shut offpowerto unit.
2. Slide out fan deck to service position as shown in Evapo-
rator Fan Service and Replacement section above.
3. Ix_osen fan motor bolts.
4. Move motor mounting plate to adjust to proper belt ten-
sion. See Table 21. Motor adjuster bolts may be used to
tighten belts. See Fig. 27.
5. Check for proper belt alignment. Adjust if necessary.
6. Tighten motor mounting plate bolts to lock motor in
pint,per position.
7. Return fan deck back into operating position.
8. Restore power to unit.
MOTOR
- PULLEY
(HIDDEN)
- MOTOR
MOUNTING
-BASE
SLIDE-OUT
[FAN DECK
Fig. 27 -- Evaporator-Fan Motor Adjustment
STRAIGHTEDGE MUST
PARALLEL
WITH BELT
MOTOR AND FAN
SHAFTS MUST BE
PARALLEL
MOVABLE
FLANGES
SETSCREWS_
FIXED FLANGES
SINGLE-GROOVE
Fig. 28 -- Evaporator-Fan Alignment and
Adjustment
Table 21 -- Belt Tension Adjustment
BELT TENSION (Ib)
50HJ VOLTAGE Unit Model Number Position 10
A,J B,K C,L D,M E,N F,P G,Q H,R
208/230 NA 4.9 5.1 5.7 NA 4.9 5.1 5.7
020 460 NA 4.9 5.1 5.7 NA 4.9 5.1 5.7
575 NA 3.9 5.2 5.7 NA 3.9 5.2 5.7
208/230 4.8 5.1 5.6 4.5 4.8 5.1 5.6 4.5
024 460 4.8 5.1 5.6 4.5 4.8 5.1 5.6 4.5
575 5.3 5.1 5.6 4.5 5.3 5.1 5.6 4.5
208/230 4.5 5.4 5.9 4.5 4.5 5.4 5.9 4.5
028 460 4.5 5.4 5.9 4.5 4.5 5.4 5.9 4.5
575 4.5 5.4 5.9 4.5 4.5 5.4 5.9 4.5
44
Condenser-Fan Adjustment (Fig. 29)
I. Shut off unit power supply.
2. Remove condenser-fan assembly (grille, motor, motor
cover, and fan) and loosen fan hub setscrews.
3. Adjust fan height as shown in Fig. 29.
4. Tighten setscrews and replace condenser-fan assembly.
/3,4!.
Fig. 29 -- Condenser-Fan Adjustment
Power Failure -- Dampers have a spnng return. In event
of power failure, &Empel.s will return to fully closed position
until power is restored. Do not manually ol)e_z_te damper
lifO[OF.
Refrigerant Charge -- Amount of refrigerant charge is
listed on unit nameplate and in Table 1. Refer to C;urier GFAC
II; Module 5; Charging, Recovery, Recycling, and Reclmnation
section for ch;uging methods and procedures. Unit panels must
be in place when unit is operating during charging procedure.
NOTE: Do not use recycled refrigerant as it may contain
contaminants.
NO CHARGE -- Use standard evacuating techniques. After
evacuating system, weigh in the specified mnount of refriger-
ant (refer to Table 1).
LOW CHARGE COOLING -- Using cooling charging chart
(see Fig. 30-32), add or remove refrigenmt until conditions of
the chart are met. An accurate pressure gage and temperature-
sensing device is required. Charging is accomplished by ensur-
ing the proper amount of liquid subcooling. Measure liquid line
pressure at the liquid line service valve using pressure gage.
Connect temperature sensing device to the liquid line ne;u the
liquid line service valve and insulate it so that outdoor ambient
temperature does not affect reading.
TO USE THE COOLING CHARGING CHART -- Use the
above temperature and pressure readings, and find the intersec-
tion point on the cooling charging chart. If intersection point on
ch_ul is above line, add refrigerant. If intersection point on
chmt is below line, cmefully recover some of the charge. Re-
check suction pressme as charge is adjusted.
NOTE: Indoor-air cfm must be within normal operating range
of unit. All outdoor fans must be operating.
The TXV (thermostatic expansion valve) is set to maintain
between 10 and 15 degrees of superheat at the compressors.
The valves are factory set and should not requile re-adjustment.
Filter Drier -- Replace whenever refrigerant system is ex-
posed to atmosphere.
Protective Devices
COMPRESSOR PROTECTION
Overcurrent -- Each compressor has internal line break motor
protection.
Overtemperature -- Each compressor has an internal protector
to protect it against excessively high dischmge gas temperatures.
Compressor Lockout -- If any of the safeties (high-pressure,
low-pressure, freeze protection thermostat, compressor internal
thermostat) trip, or if there is loss of power to the compressors,
the CLO (compressor lockout) will lock the compressors off.
To reset, manually move the thermostat setting.
45
CHARGING CHART fALLCIRCUITS)
ALL OUTDOOR FANS MUST BE OPERATING
LIOUIO PRESSURE [NTERIN6 TXV. [psigl
Fig. 30 -- Cooling Charging Chart --
50HJ020 Units
CHARGING CHART FALL CSRCUST$)
ALL OUTDOORFANS MUST BE OPERATZNG
IIIIIllllllllllllllllllllllllllllllllllll
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIllllllllllllllllllllllllllllllllllll
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
@_AGD CHARGEIF ABOVETHECURVE
IllllllllIIlllllll IIIIIIIIII]_H-IIIII
IIIIIIIIIIIIIIIIII llllllLg_i_lllllllll
llllllIIIlllllllII lll]_rllllllllIIll
IllllllllIIlllllll ],H_]IIIIIIIIIIIIIII
IlllllIIIIIlllllII llllIIIIIlllllIIII
Illllllllllllllll_ llllllllllllllllII
IIIIIIIIIIIIIIIA_?I llllllIIIlllllllII
IIIIIIIIIIIIA_IIIII llllIIllllllllIIll
IIIIIIIIIl--F'l IIIIII REMOVE CHARGE IF BELOW THE CURVE
{IIIN_{{IIIII{{ ,,,,,, ,,,,,,
II.M"IIIIIIIIIIIIII IIIIII IIIIll
.i/[llllililllllllil IIIlil Illill
IIIIIIIIIIIIIIIIII IIIIII IIIIll
444+FH_°E_°_GE_H-IIIlll HJ024
IIIIIIIIllllllllll IIIIII IIIIll
leo l_e 2oo zso aee
LIOUID PRESSURE ENTERING TXV, [psigl
Fig. 31 -- Cooling Charging Chart --
50HJ024 Units
CHARGING CHART FALL CIRCUITS)
ALLOUTDOORtANSMUSt OPrRATING
2_o
LIOUID PRESSURE ENTERING TXV, [psig]
Fig. 32 -- Cooling Charging Chart --
50HJ028 Units
EVAPORATORFANMOTORPROTECTION-- A manu-
al reset,calibratedtrip, magneticcircuitbreakerprotects
againstovercurrent.Donotbypassconnectionsorincreasethe
sizeoffilebreakertocorrecttrouble. Determine file cause and
correct it before resetting the breaker.
CONDENSER-FAN MOTOR PROTECTION -- Each
condenser-fan motor is internally protected against
overtemperature.
Fuses m'e also located in the control box and feed power to
the condenser fan motors. Always replace blown fuses with the
correct size fuse as indicated on file unit fuse label.
HIGH-PRESSURE AND LOW-PRESSURE SWITCHES --
If either switch trips, or if the complessor overtempemture
switch activates, that refrigerant circuit will be automatically
locked out by the CLO. To reset, manually move file thermo-
stat setting.
FREEZE PROTECTION THERMOSTAT (FPT) -- An FPT
is located on the top and bottom of the evaporator coil. It de-
tects frost build-up and turns off the compressor, allowing the
coil to clear Once the frost has melted, file compressor can be
reenergized.
Relief Devices -- All units have relief devices to protect
against &image from excessive pressures (i.e., fire). These
devices protect the high and low side.
Control Circuit, 24-V- Each control circuit is pro-
tected against overcurrent by a 3.2 amp circuit breakel:
Breaker can be reset. If it trips, determine cause of trouble
before resetting. See Fig. 33-35 for unit wiring.
Replacement Parts -- A complete list of replacement
parts may be obtained from any Carrier distributor upon
request.
.A --
AHA =
AUX =
.B --
.C --
C
CAP =
CB =
CCH --
CLO --
COMP --
CR --
ECB --
FCS --
FlOP --
FPT --
FU --
GND --
HACR --
HERM --
HPS --
IA
IAQ --
IFC --
IFCB --
IFM --
LEGEND
Fig. 33 -- Low Voltage Control Schematic,
Fig. 34 -- Power Schematic and Fig. 35 -- Component Arrangement
Circuit A
Adjustable Heat Anticipator
Auxiliary Contact
Circuit B
Circuit C
Compressor, Contactor
Capacitor
Circuit Breaker
Crankcase Heater
Compressor Lockout
Compressor
Compressor Relay
EconoMi$er Control Board
Fan Cycling Switch
Factory-Installed Option
Freeze Protection Thermostat
Fuse
Ground
Heating, Air Conditioning and Refrigeration
Hermetic
High-Pressure Switch
Indoor Air
Indoor Air Quality
Indoor-Fan Contactor
Indoor Fan Circuit Breaker
Indoor-Fan Motor
LPS
OA
OFC
OFM
PEC
PEM
QT
RAS
RAT
SAT
TB
TRAN
m
m
m
m
m
m
m
m
m
m
m
m
©
Low-Pressure Switch
Outdoor Air
Outdoor-Fan Contactor
Outdoor-Fan Motor
Power Exhaust Contactor
Power Exhaust Motor
Quadruple Terminal
Return-Air Sensor
Return-Air Thermistor
Supply-Air Temperature
Terminal Block
Transformer
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
.... To Indicate FlOP or Accessory
To Indicate Common Potential Only,
Not To Represent Wiring
THERMOSTAT MARKINGS
C-- Common W2 -- 2nd Stage of Heating
G-- Fan X -- Alarm Output
R-- Thermostat Power Y1 -- 1st Stage of Cooling
Wl -- 1st Stage of Heating Y2 -- 2nd Stage of Cooling
NOTES:
1. Factory wiring is in accordance with the National Electrical Codes. Any field
modifications or additions must be in compliance with all applicable codes.
2. Use 75 ° C minimum wire for field power supply. Use copper wires for all units.
3. All circuit breakers "Must Trip Amps" are equal to or less than 156% RLA
(rated load amps).
4. Compressor and fan motors are thermally protected. Three-phase motors
protected against primary single phase conditions.
5. The CLO locks out the compressor to prevent short cycling on compressor
overload and safety devices. Before replacing CLO, check these devices.
46
.........RED \
c
x
is _I$CO_NECI[D_[N ACC?
OA [NI_ALPY IS I_STALL[D
Fig. 33 -- Low Voltage Control Schematic
LS _
,C AI
_?_AN I
>C _1
>IFC
>CLO _1
>CLO_I
>¢R1
CLO BI
47
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TROUBLESHOOTING
Unit Troubleshooting -- Refer to Tables 22 and 23 for
troubleshooting details.
Table 22 -- Cooling Service Analysis
PROBLEM CAUSE REMEDY
Compressor and Power failure. Call power company.
Condenser Fan Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.
Will Not Start. Defective thermostat, contactor, transformer, or control Replace component.
relay.
Insufficient line voltage. Determine cause and correct.
Incorrect or faulty wiring. Check wiring diagram and rewire correctly.
Thermostat setting too high. Lower thermostat setting below room temperature.
Compressor Will Not Faulty wiring or loose connections in compressor circuit. Check wiring and repair or replace.
Start but Condenser Fan Compressor motor burned out, seized, or internal over- Determine cause. Replace compressor.
Runs. load open.
Defective overload. Determine cause and replace.
Compressor locked out Determine cause for safety trip and reset lockout.
One leg of 3-phase power dead. Replace fuse or reset circuit breaker.
Determine cause.
Compressor Cycles Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge
(other than normally to nameplate.
satisfying thermostat). Defective compressor. Replace and determine cause.
Insufficient line voltage. Determine cause and correct.
Blocked condenser. Determine cause and correct.
Defective overload. Determine cause and replace.
Defective thermostat. Replace thermostat.
Faulty condenser-fan motor. Replace.
Restriction in refrigerant system. Locate restriction and remove.
Compressor Operates Dirty air filter. Replace filter.
Continuously. Unit undersized for load. Decrease load or increase unit size.
Thermostat set too low. Reset thermostat.
Low refrigerant charge. Locate leak, repair, and recharge.
Air in system. Recover refrigerant, evacuate system, and recharge.
Condenser coil dirty or restricted. Clean coil or remove restriction.
Excessive Head Dirty air filter. Replace filter.
Pressure. Dirty condenser coil. Clean coil.
Refrigerant overcharged. Recover excess refrigerant.
Faulty TXV. 1. Check TXV bulb mounting and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.
Air in system. Recover refrigerant, evacuate system, and recharge.
Condenser air restricted or air short-cycling. Determine cause and correct.
Head Pressure Too Low. Low refrigerant charge. Check for leaks, repair, and recharge.
Restriction in liquid tube. Remove restriction.
Excessive Suction High heat load. Check for source and eliminate.
Pressure. Faulty TXM 1. Check TXV bulb mounting and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.
Refrigerant overcharged. Recover excess refrigerant.
Suction Pressure Too Dirty air filter. Replace filter.
Low. Low refrigerant charge. Check for leaks, repair, and recharge.
Metering device or low side restricted. Remove source of restriction.
Faulty TXM 1. Check TXV bulb mounting and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.
Insufficient evaporator airflow. Increase air quantity. Check filter and replace if
necessary.
Temperature too low in conditioned area. Reset thermostat.
Field-installed filter drier restricted. Replace.
LEGEND
TXV -- Thermostatic Expansion Valve
5O
PROBLEM
No Heat.
Table 23 -- Heating Service Analysis
CAUSE
Power failure.
Fuse blown or circuit breaker tripped.
CB1, CB2, CB3.
Thermostat not calling for heating.
No 24 vac at primary contactor.
No power (high voltage) to L2 of
primary contactor.
Bad electrical elements.
REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Check thermostat.
Check transformer and circuit breaker.
Check safety switches, one shot backup,
and auto limit.
With power off, remove high voltage wires and
check resistance of heater. Replace if open.
EconoMiSer IV Troubleshooting -- See Table 24
for EconoMi$er IV logic.
ECONOMISER IV PREPARATION -- This procedure is
used to prepare the EconoMi$er IV for troubleshooting. No
troubleshooting or testing is done by pellorming the following
procedure.
A fiJnctional view of the EconoMi$er IV is shown in
Fig. 36. Typicfd settings, sensor ranges, and jumper positions
are also shown. An EconoMi$er IV simulator program is
available fiom Canier to help with EconoMiSer IV training
and troubleshooting.
NOTE: This procedure lequires a 9-v battery. 1.2 kilo-ohln
resistor, and a 5.6 kilo-ohm resistor which are not supplied
with the EconoMiSer IV.
IMPORTANT: Be sure to record the positions of all poten-
tiometers before starting troubleshooting,
1, Disconnect power at TR and TRI, All LEDs should be
off, Exhaust fan contacts should be open,
2, Disconnect device at P and Pl,
3, Jumper P to PI.
4, Disconnect wires at T and TI, Place 5,6 kilo-ohm resistor
across T and TI.
5. Jumper TR to 1.
6. Jumper TR to N.
7. If connected, remove sensor fiom terminals So find +.
Connect 1.2 kilo-ohm 4074EJM checkout resistor across
terminals So and +.
8. Put 620-ohm resistor across terminals SR and +.
9. Set minimum position, DCV set point, and exhaust
potentiometers fully CCW (counterclockwise).
10. Set DCV maximum position potentiometer lully CW
(clockwise).
11. Set enthalpy potentiometer to D.
12. Apply power (24 vac) to termimds TR and TRI.
DIFFERENTIAL ENTHALPY-- To check differential
enthalpy:
1. Make sine EconoMiSer IV prepfuation procedure has
been perfomled.
2. Place 620-ohm resistor across So and +.
3. Place 1.2 kilo-ohm resistor across SR find +. The Free
Cool LED should be lit.
4. Remove 620-ohm resistor across So and +. The Free
Cool LED should turn off.
5. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
SINGLE ENTHALPY -- To check single enthalpy:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Set the enthfdpy potentiometer to A (fully CCW). The
Free Cool LED should be lit.
3. Set the enthalpy potentiometer to D (fully CW). The Free
Cool LED should turn off.
4. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
DCV (Demand Controlled Ventilation) AND POWER
EXHAUST -- To check DCV and Power Exhaust:
1. Make sure EconoMiSer IV preparation procedure has
been performed.
2. Ensure terminals AQ and AQI are open. The LED for
both DCV and Exhaust should be off. The actuator
should be fully closed.
3. Connect a 9-v battery to AQ (positive node) and AQI
(negative node). The LED for both DCV and Exhaust
should turn on. The actuator should drive to between 90
find 95% open.
4. Turn the Exhaust potentiometer CW until the Exhaust
LED turns off. The LED should turn off when the
potentiometer is approximately 90%. The actuator should
remain in position.
5. Turn the DCV set point potentiometer CW until the DCV
LED turns off. The DCV LED should turn off when the
potentiometer is approximately 9 v. The actuator should
c_kivefully closed.
6. Turn the DCV and Exhaust potentiometers CCW until
the Exhaust LED turns on. The exhaust contacts will
close 30 to 120 seconds after the Exhaust LED turns on.
7. Return EconoMiSer IV settings and wiring to normal
after completing troubleshooting.
DCV MINIMUM AND MAXIMUM POSITION -- To check
the DCV minimum and maximum position:
1. Make sure EconoMiSer IV preparation procedure has
been performed.
2. Connect a 9-v battery to AQ (positive node) and AQI
(negative node). The DCV LED should turn on. The
actuator should drive to between 90 and 95% open.
3. Turn the DCV Maximum Position potentiometer to mid-
point. The actuator should drive to between 20 and 80%
open.
4. Turn the DCV Maximum Position potentiometer to fully
CCW. The actuator should drive fully closed.
5. Turn the Minimum Position potentiometer to midpoint.
The actuator should drive to between 20 find 80% open.
6. Turn the Minimum Position Potentiometer fully CW. The
actuator should drive fully open.
7. Remove the jumper fiom TR and N. The actuator should
c_kivefully closed.
51
8. ReturnEconoMiSerIV settingsandwiringto normal
al_ercompletingtroubleshooting.
SUPPLY-AIRINPUT-- Tochecksupply-airinput:
1. MakesureEconoMiSerIV preparationprocedurehas
beenperformed.
2. SettheEnthalpypotentiometertoA.TheFreeCoolLED
turnson.Theactuatorshould&iveto between20and
80%open.
3. Removethe5.6kilo-ohmresistorandjumperT toTI.
Theactuatorshoulddrivefullyopen.
4. RemovethejumperacrossTandTI.Theactuatorshould
drivefullyclosed.
5. ReturnEconoMiSerIV settingsandwiringto normal
al_ercompletingtroubleshooting.
ECONOM[$ERIV TROUBLESHOOTINGCOMPLE-
TION-- ThisprocedureisusedtoreturntheEconoMiSerIV
tooperation.Notroubleshootingortestingisdonebyperform-
ingthefollowingprocedure.
1. DisconnectpoweratTRandTRI.
2. Setenthalpypotentiometertoprevioussetting.
3. SetDCVmaximumpositionpotentiometertoprevious
setting.
4. Setminimumposition,DCVsetpoint,andexhaust
potentiometerstoprevioussettings.
5. Remove620-ohmresistorfromterminalsSRand+.
6. Remove1.2kilo-ohmcheckoutresistorfromterminals
Soand+.If used,reconnectsensorfromterminalsSoand
+.
7. RemovejumperfromTRtoN.
8. RemovejumperfromTRto1.
9. Remove5.6kilo-ohmresistorfromTandTI.Reconnect
wiresatTandTI.
10.RemovejumperfromPtoPI.ReconnectdeviceatPand
PI.
11.Applypower(24vac)totermimdsTRandTRI.
Table 24 -- EconoMi$er IV Input/Output Logic
Demand Control
Ventilation (DCV)
Below set
(DCV LED Off)
Above set
(DCV LED On)
INPUTS
Enthalpy* Compressor
Outdoor Return Y1 Y2 Stage Stage
1 2
High Low On On On On
(Free Cooling LED Off) On Off On Off
Off Off Off Off
Low High On On On Off
(Free Cooling LED On) On Off Off Off
Off Off Off Off
High Low On On On On
(Free Cooling LED Off) On Off On Off
Off Off Off Off
Low High On On On Off
(Free Cooling LED On) On Off Off Off
Off Off Off Off
*For single enthalpy control, the module compares
enthalpy to the ABCD set point.
1-Power at N terminal determines Occupied/Unoccupied
24 vac (Occupied), no power (Unoccupied).
**Modulation is based on the supply-air sensor signal.
1-1-Modulation is based on the DCV signal.
OUTPUTS
N Terminalt
Occupied
Minimum position
Modulating** (between min.
position and full-open)
Minimum position
Modulating1-1- (between min.
position and DCV maximum)
Modulating***
Unoccupied
Dam )er
Closed
Modulating** (between
closed and full-open)
Closed
Modulating1-1- (between
closed and DCV
maximum)
Modulating1-1-1-
outdoor
setting:
***Modulation is based on the greater of DCV and supply-air sen-
sor signals, between minimum position and either maximum
position (DCV) or fully open (supply-air signal).
I-I-I-Modulation is based on the greater of DCV and supply-air sen-
sor signals, between closed and either maximum position (DCV)
or fully open (supply-air signal).
52
Fig. 36 -- EconoMiSer IV Functional View
53
SERVICE TRAINING
Packaged Service Training programs are an excellent way to increase your knowledge of the equipment
discussed in this manual, including:
• Unit Familiarization • Maintenance
•Installation Overview • Operating Sequence
A large selection of product, theory, and skills programs are available, using popular video-based formats and
materials. All include video and/or slides, plus companion book.
Classroom Service Training which includes "hands-on" experience with the products in our labs can mean
increased confidence that really pays dividends in faster troubleshooting and fewer callbacks. Course descriptions
and schedules are in our catalog.
CALL FOR FREE CATALOG 1-800-644-5544
[] Packaged Service Training [] Classroom Service Training
Copyright 2005 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500013-01 Printed in U.S.A. Form 50HJ-30SI Pg 54 10-05 Replaces: 50HJ-26SI
START-UP CHECKLIST
MODEL NO.: SERIAL NO.:
DATE: TECHNICIAN:
PRE-START-UP:
[] VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
[] VERIFY INSTALLATION OF OUTDOOR AIR HOOD
[] VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS
[] VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
[] CHECK THAT RETURN-AIR FILTERS ARE CLEAN AND IN PLACE
[] CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE
[] VERIFY THAT UNIT IS LEVEL
[] CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREW
IS TIGHT
[] VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED
[] VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION
[] VERIFY INSTALLATION OF THERMOSTAT/SPACE SENSOR
[] VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR AT LEAST 24 HOURS
II. START-UP
ELECTRICAL
SUPPLY VOLTAGE L 1-L2 L2-L3 L3-L 1
COMPRESSOR AMPS COMPRESSOR AI LI
COMPRESSOR B 1 LI
-- COMPRESSOR CI (020, 024 ONLY) L I
SUPPLY FAN AMPS
ELECTRIC HEAT AMPS (IF EQUIPPED) LI
TEMPERATURES
OUTDOOR-AIR TEMPERATURE
RETURN-AIR TEMPERATURE
COOLING SUPPLY AIR
ELECTRIC HEAT SUPPLY AIR (IF EQUIPPED)
F DB (Dry Bulb)
FDB
F
F
L2
L2
L2
L2
F WB (Wet Bulb)
PRESSURES
REFRIGERANT SUCTION CIRCUIT A PSIG
CIRCUIT B PSIG
CIRCUIT C PSIG (020, 024 ONLY)
REFRIGERANT DISCHARGE CIRCUIT A PSIG
CIRCUIT B PSIG
CIRCUIT C PSIG (020, 024 ONLY)
[] VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGE 45.
GENERAL
[] ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS
[] VERIFY INSTALLATION OF ALL OH'IONS AND ACCESSORIES
L3
L3
L3
L3
Copyright 2005 Carrier Corporation
Manufacturerreserves the rightto discontinue,orchangeat any time, specificationsordesignswithoutnoticeand without incurringobligations.
Book 111 Catalog No. 04-53500013-01 Printed in U,S.A. Form 50HJ-30SI Pg CL-1 10-05 Replaces: 50HJ-26SI
F
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