Carrier 48Hjd005 007 Users Manual

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48HJD005-007, 48HJE/HJF004-007
48HJL/HJM/HJN/HJG/HJH/HJK004-006 (LOW NOx)
Single-Package Rooftop Heating/Cooling

Installation, Start-Up and
Service Instructions
CONTENTS
Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . . . 3
Step 3 — Install External Trap for
Condensate Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 3
• POSITIONING
Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . . 4
Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . . . . 4
Step 7 — Make Electrical Connections . . . . . . . . . . . 4
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Adjust Factory-Installed Options . . . . . . . 8
• MOISTUREMISER DEHUMIDIFCATION
PACKAGE
• APOLLO CONTROL
• DISCONNECT SWITCH
• OPTIONAL DURABLADE ECONOMIZER
• OPTIONAL ECONOMI$ER
Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . . 19
• BELT-DRIVE MOTORS
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-32
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-38
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 39-45
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe 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 and install lockout
tag. Ensure electrical service to rooftop unit agrees with
voltage and amperage listed on the unit rating plate. Electrical shock could cause personal injury.

Disconnect gas piping from unit when leak
testing at pressure greater than 1/2 psig. Pressures greater than 1/2 psig will cause gas valve
damage resulting in hazardous condition. If
gas valve is subjected to pressure greater than
1/ psig, it must be replaced before use. When
2
pressure testing field-supplied gas piping at
pressures of 1/2 psig or less, a unit connected
to such piping must be isolated by manually
closing the gas valve(s).

INSTALLATION
Unit is shipped in the vertical discharge configuration. To
convert to horizontal discharge application, remove duct opening covers. Using the same screws, install covers on duct openings in basepan of unit with insulation-side down. Seals around
openings must be tight.
NOTE: Any combination of supply and return ducting is permissible, i.e., vertical supply combined with horizontal return.

Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb in
accordance with instructions shipped with curb. See Fig. 1. Install insulation, cant strips, roofing felt, and counter flashing as
shown. Ductwork must be attached to curb, not to the unit.
If electric control power or gas service is to be routed through
the basepan, attach the accessory thru-the-bottom service connections to the basepan in accordance with the accessory installation instructions. Connections must be installed before unit is
set on roof curb.
IMPORTANT: The gasketing of the unit to the roof curb
is critical for a watertight seal. Install gasket supplied
with the roof curb as shown in Fig. 1. Improperly
applied gasket can result in air leaks and poor unit
performance.
Curb should be level. Unit leveling tolerances are shown in
Fig. 2. This is necessary for unit drain to function properly. Refer to Accessory Roof Curb Installation Instructions for additional information as required.
SLAB MOUNT (Horizontal Units Only) — Provide a level
concrete slab that extends a minimum of 6 in. beyond unit cabinet. Install a gravel apron in front of condenser-coil air inlet to
prevent grass and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-767
Printed in U.S.A.
Form 48HJ-18SI
Pg 1
9-00
Replaces: 48HJ-17SI
Book 1 4
Tab 1a 6a

2

C

1′-911/16″ 1′-4″
[551] [406]

B

13/4″
[44.5]
[12.7] NPT
3/ ″
4
[19] NPT

1/2″

3/4″
[19] NPT

“E”
GAS

[19] NPT

11/4″ [31.7]

3/4″

“F”
POWER
3/ ″ [19] NPT
4
11/4″ [31.7]
1/2″
[12.7] NPT

Direction of airflow.

Fig. 1 — Roof Curb Details

8. Connector packages CRBTMPWR001A00
and 002A00 are for thru-the-curb connections. Packages CRBTMP003A00 and
004A00 are for thru-the-bottom connections.

7.

CRBTMPWR004A00

CRBTMPWR003A00

CONNECTOR
PKG. ACCY.
1/2″
CRBTMPWR001A00
[12.7] NPT CRBTMPWR002A00

“G”
CONTROL

6. Service clearance 4 ft on each side.

D ALT
DRAIN HOLE

NOTES:
1. Roof
curb
accessory
is
shipped
disassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: galvanized steel.
5. Attach ductwork to curb (flanges of duct
rest on curb).

48HJD004-007
50HJF004-007

UNIT SIZE

ROOF CURB
ACCESSORY
CRRFCURB001A00
CRRFCURB002A00
1′-2″ [356]
2′-0″ [610]

“A”
004-007

UNIT SIZE
48/50HJ

MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B
0.5

B-C
1.0

CONDENSATE PAN (SIDE VIEW)
DRAIN PLUG

A-C
1.0

NOTE: Drain plug is shown in factory-installed position.

Fig. 3 — Condensate Drain Pan

Fig. 2 — Unit Leveling Tolerances

reference. See Table 1 and Fig. 4 for additional information.
Operating weight is shown in Table 1 and Fig. 4.
Lifting holes are provided in base rails as shown in Fig. 5.
Refer to rigging instructions on unit.

Step 2 — Field Fabricate Ductwork — Secure all
ducts to roof curb and building structure on vertical discharge
units. Do not connect ductwork to unit. For horizontal applications, field-supplied isolation flanges should be attached to horizontal discharge openings and all ductwork should be 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 barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with applicable fire codes.
A minimum clearance is not required around ductwork.
Cabinet return-air static shall not exceed –.35 in. wg with
Durablade economizer, or –.30 in. wg with EconoMi$er, or
–.45 in. wg without economizer.
These units are designed for a minimum continuous returnair temperature in heating of 50 F (dry bulb), or an intermittent
operation down to 45 F (dry bulb), such as when used with a
night setback thermostat.

All panels must be in place when rigging and lifting.
POSITIONING — Maintain clearance around and above unit
to provide minimum distance from combustible materials, proper airflow, and service access. See Fig. 5. A properly positioned
unit will have the following clearances between unit and roof
curb; 1/4-in. clearance between roof curb and base rails on each
side and duct end of unit; 1/4 in. clearance between roof curb and
condenser coil end of unit. (See Fig. 1, section C-C.)
Do not install unit in an indoor location. Do not locate unit
air inlets near exhaust vents or other sources of contaminated
air.
Be sure that unit is installed such that snow will not block
the combustion intake or flue outlet.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof-covering material when roof curb is used.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Locate mechanical draft system flue assembly at least 48 in.
from any opening through which combustion products could
enter the building, and at least 48 in. from an adjacent building.
When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade.
NOTE: When unit is equipped with an accessory flue discharge deflector, allowable clearance is 18 inches.
Flue gas can deteriorate building materials. Orient unit such
that flue gas will not affect building materials.
Adequate combustion-air space must be provided for proper
operation of this equipment. Be sure that installation complies
with all local codes and Section 5.3, Air for Combustion and
Ventilation, NFGC (National Fuel Gas Code), ANSI (American National Standards Institute) Z223.1-1984 and addendum
Z223.1a-1987. In Canada, installation must be in accordance
with the CAN1.B149.1 and CAN1.B149.2 installation codes
for gas burning appliances.
Flue vent discharge must have a minimum horizontal clearance of 4 ft from electric and gas meters, gas regulators, and
gas relief equipment.
After unit is in position, remove shipping materials and rigging skids.

Step 3 — Install External Trap for Condensate
Drain — The unit’s 3/4-in. condensate drain connections are
located on the bottom and side of the unit. Unit discharge
connections do not determine the use of drain connections;
either drain connection can be used with vertical or horizontal
applications.
When using the standard side drain connection, ensure the
plug (Red) in the alternate bottom connection is tight before installing the unit.
To use the bottom drain connection for a roof curb installation, relocate the factory-installed plug (Red) from the bottom
connection to the side connection. See Fig. 3. The piping for
the condensate drain and external trap can be completed after
the unit is in place.
All units must have an external trap for condensate drainage. Install a trap 4-in. deep and protect against freeze-up. If
drain line is installed downstream 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 (3/4 in.).

Step 4 — Rig and Place Unit — Inspect unit for
transportation damage, and file any claim with transportation
agency. Keep unit upright and do not drop. Spreader bars are
not required if top crating is left on unit, and rollers may be
used to move unit across a roof. Level by using unit frame as a

3

NOTES:
1. Place unit on curb as close as possible to the duct end.
2. Dimension in ( ) is in millimeters.
3. Hook rigging shackles through holes in base rail as shown in
detail ‘‘A.’’ Holes in base rails are centered around the unit center of gravity. Use wooden top skid when rigging to prevent rigging straps from damaging unit.
4. Weights include base unit without economizer. See Table 1 for
unit operating weights with accessory economizer.

UNIT
48HJ
004
005
006
007

MAX
WEIGHT
lb kg
530 240
540 245
560 254
615 279

“A”
in.
73.69
73.69
73.69
73.69

mm
1872
1872
1872
1872

“B”
in.
35.50
35.50
35.50
35.50

mm
902
902
902
902

“C”
in.
33.31
33.31
33.31
33.31

mm
847
847
847
847

All panels must be in place when rigging.

Fig. 4 — Rigging Details

Step 5 — Install Flue Hood — Flue hood is shipped

Step 7 — Make Electrical Connections

screwed to the burner compartment access panel. Remove
from shipping location and, using screws provided, install flue
hood in location shown in Fig. 5 and 6.
For units being installed in California Air Quality Management Districts which require NOx emissions of 40 nanograms/
joule or less, kit CRLOWNOX001A00 must be installed.

Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code), ANSI/NFPA (National Fire Protection Association), latest edition, and local electrical codes. Do not use
gas piping as an electrical ground. Failure to follow this
warning could result in the installer being liable for personal injury of others.

Step 6 — Install Gas Piping — Unit is equipped for
use with type of gas shown on nameplate. Refer to local
building codes, or in the absence of local codes, to
ANSI Z223.1-1984 and addendum Z223.1A-1987 entitled
National Fuel Gas Code. In Canada, installation must be in
accordance with the CAN1.B149.1 and CAN1.B149.2 installation codes for gas burning appliances.
For natural gas applications, gas pressure at unit gas connection must not be less than 4 in. wg or greater than 13 in. wg
while the unit is operating. On 48HJ005-007 high-heat units,
the gas pressure at unit gas connection must not be less than
5 in. wg or greater than 13 in. wg while the unit is operating.
For propane applications, the gas pressure must not be less than
5 in. wg or greater than 13 in. wg at the unit connection.
Size gas supply piping for 0.5 in. wg maximum pressure
drop. Do not use supply pipe smaller than unit gas connection.
Support gas piping as shown in the table in Fig. 7. For example, a 3/4-in. gas pipe must have one field-fabricated support
beam every 8 ft. Therefore, an 18-ft long gas pipe would have a
minimum of 3 support beams, and a 48-ft long pipe would
have a minimum of 6 support beams.
See Fig. 7 for typical pipe guide and locations of external
manual gas shutoff valve.

FIELD POWER SUPPLY — All units except 208/230-v
units are factory wired for the voltage shown on the nameplate.
If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire
from the 230-v terminal on the transformer and connecting it to
the 200-v terminal from the transformer.
Refer to unit label diagram for additional information.
Pigtails are provided for field service. Use factory-supplied
splices or UL (Underwriters’ Laboratories) approved copper
connector.
When installing units, provide a disconnect per NEC.
All field wiring must comply with NEC and local
requirements.

4

Table 1 — Physical Data
BASE UNIT 48
NOMINAL CAPACITY
OPERATING WEIGHT (lb)
Unit
With Durablade Economizer
With EconoMi$er
With MoistureMiser Dehumidification Package
Roof Curb
COMPRESSOR
Quantity
Oil (oz)
REFRIGERANT TYPE
Operating Charge (lb-oz)
Standard Unit
Unit With MoistureMizer Dehumidification Package
CONDENSER FAN
Quantity...Diameter (in.)
Nominal Cfm
Motor Hp...Rpm
Watts Input (Total)
CONDENSER COIL
Standard Unit
Rows...Fins/in.
Total Face Area (sq ft)
Unit with MoistureMiser Dehumidification Package
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size (in.)
Nominal Cfm
Maximum Continuous Bhp
Motor Frame Size
Fan Rpm Range
Motor Bearing Type
Maximum Fan Rpm
Motor Pulley Pitch Diameter
A/B (in.)
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Belt — Type...Length (in.)
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full
Turns from Closed Position
Factory Setting — Full Turns Open
Factory Speed Setting (rpm)
Fan Shaft Diameter at Pulley (in.)
EVAPORATOR COIL
Rows...Fins/in.
Total Face Area (sq ft)

HJE/F/H/K/M/N004
3

HJD/E/F/G/H/K/L/M/N005
4

HJD/E/F/G/H/K/L/M/N006
5

HJD/HJE/HJF007
6

530
564
577
548
115

540
574
587
558
115

560
594
607
578
115

615
649
662
633
115

1
42

1
53

1
50

1
60

10- 0
12-13

9-10
13- 6

Scroll
R-22
5- 8
8-13

8-6
11-2
Propeller

1...22
3500

1...22
3500

1..22
4100

1...22
4100

1/ ...825
4

1/ ...825
4

1/ ...1100
4

1/ ...1100
4

180

Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static
Std
Hi-Static

180
320
Enhanced Copper Tubes, Aluminum Lanced Fins

1...17
14.6

2..17
16.5

1...17
3.9

1...17
3.9

2...17
16.5

320
2...17
16.5

1...17
1...17
3.9
3.9
Centrifugal Type, Belt Drive
1...10 x 10
1...10 x 10
1...10 x 10
1...10 x 10
1200
1600
2000
2400
1.20
1.20
1.30/2.40*
2.40
2.40
2.40
2.90
2.90
48
48
48/56*
56
56
56
56
56
760-1090
840-1185
1020-1460/1120-1585*
1120-1585
1075-1455
1075-1455
1300-1685
1300-1685
Ball
Ball
Ball
Ball
2100
2100
2100
2100
1.9/2.9
1.9/2.0
2.4/3.4
2.4/3.4
2.8/3.8
2.8/3.8
3.4/4.4
3.4/3.4
1/2
5 /8
5/8
1/2
5/
5/
5/
5/
8
8
8
8
4.5
4.0
4.0
4.0
4.5
4.0
4.5
4.5
1...A...33
1...A...33
1....4...40
1...A...38
1...A...39
1...A...39
1...A...40
1...A...40
10.0-12.4
10.0-12.4
14.7-15.5
14.7-15.5
65
70
75
95
65
65
60
60
5
5
6
5
6
6
5
5
3
3
3
3
1
1
1
3 /2
3 /2
3 /2
31/2
890
980
1240
1304
1233
1233
1396
1396
5/
5/
5/
5/
8
8
8
8
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Metering Device
2...15
2...15
4...15
4...15
5.5
5.5
5.5
5.5

LEGEND
Bhp — Brake Horsepower

*Single phase/three phase.
†Indicates automatic reset.
**48HJD005-007 and 48HJE004 (72,000 Btuh heat input) units have 2 burners.
48HJE005-007 and 48HJF004 (115,000 Btuh heat input) units and 48HJF005007 (150,000 Btuh Heat input) units have 3 burners.
††An LP kit is available as an accessory.
||Three-phase standard models have heating inputs as shown. Single-phase
standard models have one-stage heating with heating input values as follows:
48HJE004, 48HJD005,006 — 72,000 Btuh
48HJF004, 48HJE005,006 — 115,000 Btuh
48HJF005,006 — 150,000 Btuh
***California compliant three-phase models.
†††California SCAQMD compliant low NOx models have combustion products that
are controlled to 40 nanograms per joule or less.

5

Table 1 — Physical Data (cont)
BASE UNIT 48
FURNACE SECTION
Rollout Switch Cutout Temp (F)†
Burner Orifice Diameter (in. ...drill size)**
Natural Gas — Std

Liquid Propane — Alt††

Thermostat Heat Anticipator Setting (amps) 208/230/460 v
First Stage
Second Stage
Gas Input (Btuh)
First Stage/Second Stage

Efficiency (Steady State) (%)

Temperature Rise Range

Manifold Pressure (in. wg)
Natural Gas — Std
Liquid Propane — Alt††
Maximum Static Pressure (in. wg)
Field Gas Connection Size (in.)
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief
Cutout
Reset (Auto.)
LOSS-OF-CHARGE SWITCH/LOW-PRESSURE
SWITCH (Liquid LIne) (psig)
Cutout
Reset (Auto.)
FREEZE PROTECTION THERMOSTAT
Opens (F)
Closes (F)
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)

HJE/F/H/K/M/N004
195
HJE .113...33
HJF .113...33
—
HJH .113...33
HJK .113...33
—
HJM .102...38
HJN .102...38
—
HJE .089...43
HJF .089...43
—
HJH .082...45
HJK .082...45
—
HJM .082...45
HJN .082...45
—
.14
.14
HJE|| 50,000/ 72,000
HJF|| 82,000/115,000
—
HJH*** —/ 72,000
HJK***—/115,000
—
HJM††† —/ 60,000
HJN††† —/ 90,000
—
HJE 82
HJF 81
—
HJH 82
HJK 81
—
HJM 81
HJN 81
—
HJE 15-45
HJF 55-85
—
HJH 15-45
HJK 55-85
—
HJM 20-50
HJN 30-60
—
3.5
3.5
1.0
1/
2

HJD/E/F/G/H/K/L/M/N005

HJD/E/F/G/H/K/L/M/N006

HJD/HJE/HJF007

195

195

195

HJD .113...33
HJE .113...33
HJF .129...30
HJG .113...33
HJH .113...33
HJK .129...30
HJL .102...38
HJM .102...38
HJN .116...32
HJD .089...43
HJE .089...43
HJF .102...38
HJG .089...43
HJH .089...43
HJK .102...38
HJL .082...45
HJM .082...45
HJN .094...42

HJD .113...33
HJE .113...33
HJF .129...30
HJG .113...33
HJH .113...33
HJK .129...30
HJL .102...38
HJM .102...38
HJN .116...32
HJD .089...43
HJE .089...43
HJF .102...38
HJG .089...43
HJH .089...43
HJK .102...38
HJL .082...45
HJM .082...45
HJN .094...42

HJD .113...33
HJE .113...33
HJF .129...30
—
—
—
—
—
—
HJD .089...43
HJE .089...43
HJF .102...38
—
—
—
—
—
—

.14
.14

.14
.14

.14
.14

HJD|| 50,000/ 72,000
HJE|| 82,000/115,000
HJF|| 120,000/150,000
HJG*** —/ 72,000
HJH*** —/115,000
HJK*** —/150,000
HJL††† —/ 60,000
HJM††† —/ 90,000
HJN††† —/120,000
HJD 82
HJE 81
HJF 80
HJG 82
HJH 81
HJK 80
HJL 81
HJM 81
HJN 82
HJD 15-45
HJE 35-65
HJF 50-80
HJG 15-45
HJH 35-65
HJK 50-80
HJL 20-50
HJM 30-60
HJN 40-70

HJD|| 50,000/ 72,000
HJE|| 82,000/115,000
HJF|| 120,000/150,000
HJG*** —/ 72,000
HJH*** —/115,000
HJK*** —/150,000
HJL††† —/ 60,000
HJM†††—/ 90,000
HJN††† —/120,000
HJD 82
HJE 81
HJF 80
HJG 82
HJH 81
HJK 80
HJL 81
HJM 81
HJN 82
HJD 15-45
HJE 35-65
HJF 50-80
HJG 15-45
HJH 35-65
HJK 50-80
HJL 20-50
HJM 30-60
HJN 40-70

3.5
3.5
1.0
1/
2

3.5
3.5
1.0
1/
2

HJD|| 50,000/ 72,000
HJE|| 82,000/115,000
HJF|| 120,000/150,000
—
—
—
—
—
—
HJD 82
HJE 81
HJF 80
—
—
—
—
—
—
HJD 15-45
HJE 35-65
HJF 50-80
—
—
—
—
—
—
3.5
3.5
1.0
1/
2

450 ± 50
428
320
7±3
22 ± 5
30 ± 5
45 ± 5
Cleanable
1...20 x 24 x 1
Throwaway
2...16 x 25 x 2

LEGEND
Bhp — Brake Horsepower

*Single phase/three phase.
†Indicates automatic reset.
**48HJD005-007 and 48HJE004 (72,000 Btuh heat input) units have 2 burners.
48HJE005-007 and 48HJF004 (115,000 Btuh heat input) units and 48HJF005007 (150,000 Btuh Heat input) units have 3 burners.
††An LP kit is available as an accessory.
||Three-phase standard models have heating inputs as shown. Single-phase
standard models have one-stage heating with heating input values as follows:
48HJE004, 48HJD005,006 — 72,000 Btuh
48HJF004, 48HJE005,006 — 115,000 Btuh
48HJF005,006 — 150,000 Btuh
***California compliant three-phase models.
†††California SCAQMD compliant low NOx models have combustion products that
are controlled to 40 nanograms per joule or less.

6

UNIT
48HJ
004
005
006
007

A
B
C
D
E
F
G

STANDARD
UNIT
WEIGHT
Lb
Kg
530
240
540
245
560
254
615
279

DURABLADE
ECONOMIZER
WEIGHT
Lb
Kg
34
15.4
34
15.4
34
15.4
34
15.4

ECONOMI$ER
WEIGHT
Lb
47
47
47
47

CONNECTION SIZES
13/8″ Dia [35] Field Power Supply Hole
2″″ Dia [51] Power Supply Knockout
13/4″ Dia [44] Charging Port Hole
7/8″ Dia [22] Field Control Wiring Hole
3/ ″-14 NPT Condensate Drain
4
5/ ″-14 NPT Gas Connection
8
21/2″ Dia [64] Power Supply Knockout

Kg
21.3
21.3
21.3
21.3

CORNER
WEIGHT
(A)
Lb
Kg
127 57.6
129 58.5
134 60.8
147 66.7

CORNER
WEIGHT
(B)
Lb
Kg
122 55.3
124 56.2
129 58.5
142 64.4

CORNER
WEIGHT
(C)
Lb
Kg
138 62.6
141 64.0
146 66.2
160 72.6

CORNER
WEIGHT
(D)
Lb
Kg
143 64.9
146 66.2
151 68.5
166 75.3

BOTTOM POWER CHART, THESE HOLES REQUIRED FOR
USE WITH ACCESSORY PACKAGES — CRBTMPWR001A00
THROUGH CRBTMPWR004A00
THREADED
CONDUIT SIZE
1/2″
3/4″
11/4″
1/2″ NPT
3/4″ NPT

WIRE
USE
24 V
Power*
Power*
Gas†
Gas†

REQURED
HOLE SIZES (MAX.)
7/8″ [22.2]
11/8″ [28.4]
13/4″ [44.4]
11/4″ [31.8]
15/8″ [41.3]

*Select either 3/4″ or 11/4″ for power, depending on wire size.
†Select either 1/2″ or 3/4″ for gas depending on gas connection.
NOTES:
1. Dimensions in [
2.

] are in millimeters.

Center of gravity.

3.

Direction of airflow.

4. On vertical discharge units, ductwork to be attached to accessory roof curb only. For horizontal discharge units, field-supplied flanges should be attached to horizontal discharge openings, and all
ductwork should be attached to the flanges.
5. Minimum clearance (local codes or jurisdiction may prevail):
a. Between unit, flue side and combustible surfaces, 48 inches. (18 in. when using accessory flue
discharge deflector.)
b. Bottom of unit to combustible surfaces (when not using curb), 1 inch.
Bottom of base rail to combustible surfaces (when not using curb) 0 inches.
c. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the greater
clearance is optional.
d. Overhead, 60 in. to assure proper condenser fan operation.
e. Between units, control box side, 42 in. per NEC (National Electrical Code).
f. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.
g. Between unit and block or concrete walls and other grounded surfaces, control box side, 42 in.
per NEC.
h. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil and combustion side as stated in notes
5a, b and c, a removable fence or barricade requires no clearance.
7. Units may be installed on combustible floors made from wood or Class A, B, or C roof covering
material if set on base rail.
8. The vertical center of gravity is 1′-6″ [457] up from the bottom of the base rail.

Fig. 5 — Base Unit Dimensions — 48HJ004-007
7

NOTE: If accessory thru-the-bottom connections and roof curb
are used, refer to the Thru-the-Bottom Accessory Installation
Instructions for information on power wiring and gas connection piping. The power wiring, control wiring and gas piping
can be routed through field-drilled holes in the basepan. The
basepan is specially designed and dimpled for drilling the
access connection holes.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat
assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation
instructions.
Route thermostat cable or equivalent single leads of colored
wire from subbase terminals through connector on unit to lowvoltage connections (shown in Fig. 9).
Connect thermostat wires to matching screw terminals of
low-voltage connection board. See Fig. 9.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C minimum). All
wire larger than no. 18 AWG cannot be directly connected to
the thermostat and will require a junction box and splice at the
thermostat.
Pass the control wires through the hole provided in the corner post; then feed wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control
box. See Fig. 10. The raceway provides the UL required clearance between high- and low-voltage wiring.
HEAT ANTICIPATOR SETTINGS — Set heat anticipator settings at .14 amp for first stage and .14 for second stage heating,
when available.

Fig. 6 — Flue Hood Details

LEGEND
NFGC — National Fuel Gas Code
*Field supplied.
NOTE: Follow all local codes.

Step 8 — Adjust Factory-Installed Options
MOISTUREMISER DEHUMIDIFICATION PACKAGE —
MoistureMiser package operation can be controlled by field
installation of a Carrier-approved humidistat (Fig. 11). To
install the humidistat:
1. Route humidistat cable through hole provided in unit corner post.
2. Feed wires through the raceway built into the corner post
to the 24-v barrier located on the left side of the control
box. See Fig. 10. The raceway provides the UL-required
clearance between high- and low-voltage wiring.
3. Use a wire nut to connect humidistat cable into lowvoltage wiring as shown in Fig. 12.
APOLLO CONTROL — The optional Apollo control is used
to actively monitor all modes of operation as well as indoor
(evaporator) fan status, filter status, and indoor-air quality. The
Apollo control is designed to work with Carrier TEMP and
VVT® systems.
The thermostat must be wired to the Apollo Control before
starting the unit. Refer to the Apollo Control installation
instructions for information on installing the thermostat.
DISCONNECT SWITCH — The optional disconnect switch
is non-fused. The switch has the capability of being locked in
place for safety purposes.

SPACING OF SUPPORTS
STEEL PIPE
NOMINAL DIAMETER
(in.)
1/ 2
3/ or 1
4
11/4 or larger

SPACING OF SUPPORTS
X DIMENSION
(ft)
6
8
10

Fig. 7 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
Install conduit through side panel openings indicated in
Fig. 5. Route power lines through connector to terminal connections as shown in Fig. 8.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate (also see
Tables 2A-2D). On 3-phase units, voltages between phases
must be balanced within 2% and the current within 10%. Use
the formula shown in Tables 2A-2D, Note 2 to determine the
percent voltage imbalance. Operation on improper line voltage
or excessive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

8

C
COMPS
EQUIP
GND
IFC
NEC
TB

LEGEND
— Contactor
— Compressors
— Equipment
— Ground
— Indoor (Evaporator)
Fan Contactor
— National Electrical Code
— Terminal Block

Fig. 8 — Power Wiring Connections

RACEWAY

AHA
CC
TC
TH

LEGEND
— Adjustable Heat Anticipator
— Cooling Compensator
— Thermostat-Cooling
— Thermostat-Heating
Field Wiring
Factory Wiring

LOW VOLTAGE
CONNECTIONS

INTEGRATED GAS UNIT
CONTROLLER (IGC)

HOLE IN END PANEL (HIDDEN)

Fig. 10 — Field Control Wiring Raceway

NOTE: Connect Y2 when unit is equipped with an integrated
economizer.

Fig. 9 — Low-Voltage Connections With or
Without Economizer
9

Table 2A — 48HJ Electrical Data Standard Motor (Units Without Electrical Convenience Outlet)
UNIT
48HJ

004
(3 Tons)

005
(4 Tons)

006
(5 Tons)

007
(6 Tons)

NOMINAL
VOLTAGE
(V-Ph-Hz)
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60

VOLTAGE
RANGE

COMPRESSOR

OFM

IFM

COMBUSTION
FAN MOTOR

Min
187
187
414
518
187
187
414
518
187
187
414
518
187
414
518

RLA
16.0
10.3
5.1
4.2
23.7
13.5
7.4
5.8
28.8
17.3
9.0
7.1
20.5
9.6
7.7

FLA
0.7
0.7
0.4
0.4
0.7
0.7
0.4
0.4
1.5
1.5
0.8
0.8
1.4
0.6
0.6

FLA
4.9
4.9
2.2
2.2
4.9
4.9
2.2
2.2
8.8
5.8
2.6
2.6
5.8
2.6
2.6

FLA
.57
.57
.30
.30
.57
.57
.30
.30
.57
.57
.30
.30
.57
.30
.30

Max
254
254
508
632
254
254
508
632
254
254
508
632
254
508
632

LRA
88.0
77.0
39.0
31.0
129.0
99.0
49.5
40.0
169.0
123.0
62.0
50.0
156.0
70.0
56.0

POWER
SUPPLY
WITH OUTLET
MCA
MOCP†
25.6/25.6
35/35
18.5/18.5
25/25
9.0
15
7.3
15
35.2/35.2
45/45
22.5/22.5
30/30
11.9
15
9.3
15
46.3/46.3
60/60
28.9/28.9
35/35
14.7
20
11.6
15
32.8/32.8
40/40
15.2
20
12.2
15

MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
25/25 101/101
18/18
90/ 90
9
46
7
36
34/34 142/142
22/22 112/112
12
56
9
45
45/45 216/216
28/28 168/168
14
84
11
67
32/32 200/200
15
92
13
78

Table 2B — 48HJ Electrical Data Standard Motor (Units With Electrical Convenience Outlet)
UNIT
48HJ

004
(3 Tons)

005
(4 Tons)

006
(5 Tons)

007
(6 Tons)

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP—
NEC —
OFM —
RLA —
UL
—

NOMINAL
VOLTAGE
(V-Ph-Hz)
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60

VOLTAGE
RANGE

COMPRESSOR

OFM

IFM

COMBUSTION
FAN MOTOR

Min
187
187
414
518
187
187
414
518
187
187
414
518
187
414
518

RLA
16.0
10.3
5.1
4.2
23.7
13.5
7.4
5.8
28.8
17.3
9.0
7.1
20.5
9.6
7.7

FLA
0.7
0.7
0.4
0.4
0.7
0.7
0.4
0.4
1.5
1.5
0.8
0.8
1.4
0.6
0.6

FLA
4.9
4.9
2.2
2.2
4.9
4.9
2.2
2.2
8.8
5.8
2.6
2.6
5.8
2.6
2.6

FLA
.57
.57
.30
.30
.57
.57
.30
.30
.57
.57
.30
.30
.57
.30
.30

Max
254
254
508
632
254
254
508
632
254
254
508
632
254
508
632

LRA
88.0
77.0
39.0
31.0
129.0
99.0
49.5
40.0
169.0
123.0
62.0
50.0
156.0
70.0
56.0

LEGEND
Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Outdoor (Condenser) Fan Motor
Rated Load Amps
Underwriters’ Laboratories

POWER
SUPPLY
WITH OUTLET
MCA
MOCP†
31.6/31.6
40/40
24.5/24.5
30/30
11.7
15
9.5
15
41.2/41.2
50/50
28.5/28.5
35/35
14.6
20
11.5
15
52.3/52.3
60/60
34.9/34.9
40/40
17.4
20
13.8
20
38.8/38.8
45/45
17.9
20
14.3
20

MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
30/30 106/106
24/24
95/95
11
48
9
38
39/39 147/147
27/27 117/117
14
58
11
47
50/50 221/221
34/34 173/173
17
86
13
69
37/37 205/205
17
94
15
79

Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
=

452 + 464 + 455
3
1371
3

= 457
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
457

*Used to determine minimum disconnect per NEC.
†Fuse or HACR circuit breaker.
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. UL, Canada 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.
max voltage deviation from average voltage
= 100 x
average voltage

= 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.

10

Table 2C — 48HJ High-Static Motor Units Without Electrical Convenience Outlet
UNIT
48HJ

004

005

006

007

NOMINAL
VOLTAGE
(V-Ph-Hz)
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60

VOLTAGE
RANGE

COMPRESSOR
(each)

OFM

IFM

COMBUSTION
FAN MOTOR

Min Max
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632

RLA
10.3
5.1
4.2
13.5
7.4
5.8
17.3
9.0
7.1
20.5
9.6
7.7

FLA
0.7
0.4
0.4
0.7
0.4
0.4
1.5
0.8
0.8
1.4
0.6
0.6

FLA
5.8
2.6
2.6
5.8
2.6
2.6
7.5
3.4
3.4
7.5
3.4
3.4

RLA
0.6
0.3
0.3
0.6
0.3
0.3
0.6
0.3
0.3
0.6
0.3
0.3

LRA
77.0
39.0
31.0
99.0
49.5
40.0
123.0
62.0
50.0
156.0
70.0
56.0

POWER
SUPPLY
MCA
19.4/19.4
9.4
7.7
23.4/23.4
12.3
9.7
30.6/30.6
15.5
12.2
30.6/30.6
15.5
12.2

MOCP†
25/25
15
15
30/30
15
15
35/35
20
15
35/35
20
15

MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
19/19
120/120
9
60
8
48
23/23
142/142
12
71
9
57
30/30
187/187
15
94
12
76
30/30
187/187
15
94
12
76

Table 2D — 48HJ High-Static Motor Units With Electrical Convenience Outlet
UNIT
48HJ

004

005

006

007

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP—
NEC —
OFM —
RLA —
UL
—

NOMINAL
VOLTAGE
(V-Ph-Hz)
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60

VOLTAGE
RANGE

COMPRESSOR
(each)

OFM

IFM

COMBUSTION
FAN MOTOR

Min Max
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632

RLA
10.3
5.1
4.2
13.5
7.4
5.8
17.3
9.0
7.1
20.5
9.6
7.7

FLA
0.7
0.4
0.4
0.7
0.4
0.4
1.5
0.8
0.8
1.4
0.6
0.6

FLA
5.8
2.6
2.6
5.8
2.6
2.6
7.5
3.4
3.4
7.5
3.4
3.4

RLA
0.6
0.3
0.3
0.6
0.3
0.3
0.6
0.3
0.3
0.6
0.3
0.3

LRA
77.0
39.0
31.0
99.0
49.5
40.0
123.0
62.0
50.0
156.0
70.0
56.0

LEGEND
Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Outdoor (Condenser) Fan Motor
Rated Load Amps
Underwriters’ Laboratories

POWER
SUPPLY
MCA
25.4/25.4
12.1
9.8
29.4/29.4
15.0
11.8
36.6/36.6
18.2
14.4
40.5/40.5
18.7
15.0

MOCP†
30/30
15
15
35/35
20
15
40/40
20
20
45/45
25
20

MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
25
124/124
12
63
10
50
29
146/146
14
73
11
59
36
192/192
18
96
14
77
39
224/224
18
104
15
89

Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
=

452 + 464 + 455
3
1371
3

= 457
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
457

*Used to determine minimum disconnect per NEC.
†Fuse or HACR circuit breaker.
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. UL, Canada 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.
max voltage deviation from average voltage
= 100 x
average voltage

= 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.

11

OPTIONAL DURABLADE ECONOMIZER — The optional economizer hood assembly is packaged and shipped in the
filter section. Damper blades and control boards are installed at
the factory and the economizer is shipped in the vertical discharge position.
NOTE: Horizontal discharge block-off plate is shipped with
the air hood package. If unit is to be used for vertical discharge
application, discard this plate.
Assembly:
1. Determine if ventilation air is required in building. If so,
determine the minimum amount to be supplied by each
unit and record quantity of ventilation air needed for use
in Step 7.
2. Remove filter access panel by raising panel and swinging
panel outward. Panel is now disengaged from track and
can be removed. No tools are required to remove filter access panel. Remove outdoor-air opening panel. Save panels and screws. See Fig. 13. Remove economizer, and remove optional outdoor-air damper hood package from
filter section (located behind economizer).
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 14. Install seal strips on hood top and sides. Put
aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.
4. Slide economizer into unit and secure with screws. See
Fig. 15.
NOTE: Be sure to engage rear economizer flange under
tabs in vertical return-air opening.
5. To convert to horizontal discharge application:
a. Rotate economizer 90 degrees until the economizer motor faces the condenser section (see
Fig. 16).
b. Remove tape and shipping screw, rotate the barometric relief damper cover 90 degrees.

C
CCH
COMP
FU
HU
IFM
LLSV
S-LPS
TRAN

—
—
—
—
—
—
—
—
—

c. Install horizontal discharge block-off plate over
the opening on the access panel. (Block-off plate
MUST be installed before installing hood assembly.) See Fig. 17.
6. Remove 12-pin blue and yellow wire jumper plug from
factory wiring harness and store. Insert economizer plug
into 12-pin plug of factory wiring harness. Remove tape
and shipping screw from barometric relief damper. See
Fig.18.
7. If ventilation air is not required, proceed to Step 8. If ventilation air is required, determine minimum position setting for required airflow. See Fig. 19. Adjust minimum
position setting by adjusting the screws on the position
setting bracket. Slide bracket until the top screw is in the
position determined by Fig. 19. Tighten screws.
8. Remove tape from outdoor-air thermostat (OAT). Fasten
OAT to inside of hood using screws and speed clips provided. See Fig. 20. Make sure OAT terminals are positioned up.

MOISTUREMISER

% RELATIVE HUMIDITY

Fig. 11 — Accessory Field-Installed Humidistat

LEGEND
Contactor (Compressor)
Crankcase Heater
Compressor
Fuse
Humidistat
Indoor (Evaporator) Fan Motor
Liquid Line Solenoid Valve
Low-Pressure Switch (Subcooler Only)
Transformer
Factory Wiring
Accessory or Optional Wiring

Fig. 12 — Typical MoistureMiser Dehumidification Package Humidistat Wiring
(208/230-V Unit Shown)
12

9. Replace outdoor-air opening panel using screws from
Step 2. Replace filter access panel. Ensure the filter access panel slides along the tracks and is securely engaged.
10. Fasten hood top and side plate assembly (Fig. 14) to
outdoor-air opening panel with screws provided.
11. Place knob supplied with economizer on OAT. See
Fig. 20. Set for 3° F below indoor room thermostat setting. If accessory enthalpy control (EC) is used in place of
OAT, see instructions shipped with EC for installation
and adjustment. See Fig. 20.
12. Connect OAT per Fig. 21.
13. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen retainer to hood using screws provided.
NOTE: Refer to Fig. 22 for economizer barometric relief
damper characteristics.

ECONOMIZER
CONTROL BOARD

ECONOMIZER
PLUG

ECONOMIZER
MOTOR

TOP
SCREW

SHIPPING
SCREW

Fig. 15 — Durablade Economizer Installed in Unit

ECONOMIZER
CONTROL
BOARD

FILTER
ACCESS
PANEL

OUTDOOR-AIR
OPENING

COMPRESSOR
ACCESS
PANEL

BAROMETRIC
RELIEF
DAMPER

Fig. 13 — Typical Access Panel Locations

ECONOMIZER
PLUG

ECONOMIZER
MOTOR

Fig. 16 — Horizontal Durablade Economizer
Installation

BLOCK-OFF PLATE

Fig. 17 — Horizontal Discharge Block-Off Plate

Fig. 14 — Outdoor-Air Hood Details

13

U-SHAPED
HOLE
(NOT SHOWN)
ECONOMIZER
PLUG

WIRING
HARNESS

Fig. 18 — Typical Durablade Economizer and
Wiring Harness

OAT
(TERMINALS ARE UP)

TOP

UNIT

OUTSIDE AIR
SCREEN

Example:
Given —
Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . .0.1 in. wg
Outdoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1100 cfm
Determine —
Setting = 6

ENTHALPY
CONTROL

REV. B

B

Fig. 19A — Durablade Economizer Damper
Minimum Position Setting

TR

C

24VAC

2

TR1

1

3 mA MIN. AT 11 VDC

B A

ENTHALPY CONTROL

3

D

CW–SETPOINTS–CCW

198818A

RUSH AT 24VAC

CONTACTS SHOWN IN HIGH ENTHALPY
OR UNPOWERED STATE

0

°F

CONTACT RATINGS: 1.5A RUN, 3.5A IN

OUTDOOR TEMP.

% 90
H
DAMPER
U 70
CLOSED
M
I 60
DAMPER
D
OPEN
I 30
T
Y 10
50 55 60 65 70 75 80 85

1

SO

D

TR

S

4

2

5

3

P1

T1

1

P

T

2

C

MINIMUM
POSITION

OPEN

HOOD

97-3672

Fig. 20 — Outdoor-Air Thermostat/
Enthalpy Control Installation

Fig. 19B — Durablade Economizer Minimum
Position Damper Setting

Fig. 21 — Wiring Connections for
Outdoor-Air Thermostat

9

8

7

6

5

4

3

REV.

14

the EconoMi$er plug into the unit wiring harness. Refer
to wiring diagram Fig. 30 and 31. Also refer to Fig. 32 if
installing an accessory power exhaust.
9. Install the complete hood assembly on the unit and secure
using the screws provided.
10. Remove the indoor fan motor access panel. See Fig. 33.
11. Mount the supply-air temperature sensor to the lower left
portion of the indoor blower housing with the two
(2) screws provided (see Fig. 34). Connect the violet and
pink wires to the corresponding connections on the
supply-air temperature sensor. Replace the indoor fan
motor access panel.

0.90

0.80

PRESSURE DROP (in. wg)

0.70

0.60
0.50
0.40

ECONOMI$ER
PLUG

0.30

CONTROLLER
GEAR-DRIVEN
DAMPER

0.20
OUTDOOR AIR
TEMPERATURE
SENSOR

0.10

0.00

100

200

300

400
CFM

500

600

700

800
ACTUATOR

Fig. 22 — Durablade Economizer Barometric
Relief Damper Characteristics
BAROMETRIC RELIEF DAMPERS

OPTIONAL ECONOMI$ER — See Fig. 23 for EconoMi$er
component locations.
1. To remove the existing unit filter access panel, raise the
panel and swing the bottom outward. The panel is now
disengaged from the track and can be removed. Remove
the indoor coil access panel and discard. See Fig. 24.
If installing an optional Power Exhaust Assembly, refer to
the EconoMi$er Power Exhaust Installation Instructions.
Controller should be mounted in vertical position as
shown in Fig. 23.
2. Assemble the hood assembly as follows:
Remove the EconoMi$er hood from its packaging. Remove shipping brackets holding hood package to
EconoMi$er. Locate the outdoor-air opening panel. See
Fig. 25. Remove hood assembly shipping brackets located on the back (sloped) side of the EconoMi$er assembly.
These brackets are used to retain the hood assembly during shipping only.
3. Install the 1/8 x 3/4-in. seal strip on the exhaust air hood
side panels and the bottom bracket. Assemble the exhaust
air hood to the outdoor-air opening panel as shown in
Fig. 25, using the screws provided. Do not attach hood
assembly to unit at this time.
4. Install the 1/8 x 3/4 in. seal strip on the outdoor-air hood
top and side panels. Assemble the outdoor-air hood to the
outdoor-air opening panel as shown in Fig. 26, using the
screws provided. Do not attach hood assembly to the unit
at this time.
5. Slide the outdoor-air inlet screens into the screen track on
the hood side panels. While holding the screens in place,
fasten the screen retainer to the hood using the screws
provided. Repeat the process for the barometric exhaust
air screen. Do not attach completed (Fig. 27) hood assembly to unit at this time.
6. Install the EconoMi$er assembly into the rooftop unit.
See Fig. 28 and 29.
NOTE: Be sure to engage rear EconoMi$er flange under
tabs in return-air opening of the unit base. See Fig. 28.
7. Install the outdoor-air block-off plate, then secure the
EconoMi$er with the screws provided. See Fig. 29.
8. Remove and discard the 12-pin jumper plug from the unit
wiring harness located int he upper left corner and insert

Fig. 23 — Economizer Component Locations

OUTDOOR-AIR
OPENING PANEL

FILTER ACCESS
PANEL

Fig. 24 — Typical Access Panel Locations
OUTDOOR AIR
OPENING PANEL

EXHAUST AIR
HOOD TOP
SCREEN
RETAINER

SEAL STRIP

EXHAUST AIR
HOOD SIDES

EXHAUST AIR SCREEN
EXHAUST AIR
BOTTOM BRACKET

Fig. 25 — Exhaust Air Hood Assembly
15

OUTDOOR AIR
OPENING
PANEL

SEAL STRIP

UNIT FILTER
RACK

OUTDOOR AIR
HOOD TOP

SCREEN
RETAINER
SEAL STRIP

ECONOMIZER CLIP
HVAC UNIT

ECONOMIZER
UNIT BASE

OUTDOOR AIR
INLET
SCREENS

ECONOMIZER REAR
FLANGE

ASSEMBLED
EXHAUST HOOD

Fig. 28 — Rear EconoMi$er Flange Installation

OUTDOOR AIR
HOOD SIDES

Fig. 26 — Outdoor-Air Hood Assembly

WIRING
HARNESS

OUTDOOR
AIR
BLOCK-OFF
PLATE

Fig. 27 — Completed Hood Assembly

OAT

—

Fig. 29 — EconoMi$er Installed

LEGEND
Outdoor-Air Thermostat

Fig. 30 — EconoMi$er Wiring
16

BROWN

ECONOMI$ER
CONTROLLER

VIOLET

OAT
WHITE
RED

COM
OAH
-15 V

BROWN

RAT

VIOLET
WHITE

COM
RAH

RED

+15 V

CONTROL BOX/BURNER
ACCESS PANEL

TEMP
TEMP
COM
OUT
PWR

OUTDOOR
AIR
SENSOR

TEMP
TEMP
COM
OUT
PWR

RETURN
AIR
SENSOR

CO2 SENSOR
24
V+
COM VAC

CO2 (+)
CO2 COM
DAT
COM
REM POT
COM
LED
COM

INDOOR FAN MOTOR
ACCESS PANEL AND BLOWER

SUPPLY AIR
TEMPERATURE SENSOR
PINK
TEMP
VIOLET
TEMP

Fig. 33 — Typical Access Panel Locations
(Standard Efficiency Unit Shown)

Fig. 31 — EconoMi$er Sensor Wiring

POWER EXHAUST SYSTEM (HIGH VOLTAGE)

RED

GRAY

H1

H2

X4

X2 X3

FAN 1

CAPACITOR 2
CAPACITOR 1

X1

H1

H3 H2

FAN 2

RELAY 2
RELAY 1

RED YEL BLU GRAY
HT01AH850
(460 VAC)

HT01AH859
(575 VAC)

TO FUSED
DISCONNECT

H4

4-PIN
CONNECTOR PLUG
(HIGH VOLTAGE)
X2 X3

X4

SECONDARY
230VAC

3-PIN
CONNECTOR PLUG
(LOW VOLTAGE)

X1

SECONDARY
230VAC

FIELD SUPPLIED
WIRING

BLACK

OR

BLACK

COMPRESSOR 1
CONTACTOR
11

LT. BLUE

21
230VAC

13

BROWN

23

FAN 1

GREEN/
YELLOW

2 x 4 IN.
HANDY BOX
BLACK L1

1

BLUE
L2 2
GREEN GND

3
4

9

2

5

8

1

4

7

B
R1
24 VAC

3-PIN
CONNECTOR
PLUG

A

BLUE

L1

1
L2
2
GND
3
4

230 VAC
1 PHASE

6

BLACK

C1

4-PIN
CONNECTOR
PLUG

3

ORANGE

1

YELLOW

2

BROWN
BLACK
BLACK

BLUE

LT. BLUE

GREEN

BROWN

FAN 2

C1
GREEN/
YELLOW

3

6

9

2

5

8

4

7

1

BLUE

Fig. 32 — Wiring Diagram for Power Exhaust System

17

B

BLACK

R2
24 VAC

A

3

Ventilation Air (Minimum Position Set Up) — If ventilation
air is not required, proceed to Step 5. If ventilation air is required, perform the following:
1. The indoor fan must be on to set the ventilation air. Either
put the thermostat in the continuous fan mode or jumper
the R and G terminals at the rooftop unit connection
board.
2. Locate the minimum position (MIN POS) potentiometer.
Turn the potentiometer full CCW to fully close the outdoor air dampers. Turn the potentiometer gradually
clockwise (CW) to the desired position. See Fig. 35.
3. Replace the filter access panel. See Fig. 24. Ensure the filter access panel slides along the tracks and is securely
engaged.
4. Calculate the minimum airflow across the EconoMi$er.
a. Calculate % of outside air using the following
formula.
% Outdoor air through EconoMi$er
Mixture Temp –
Return Air Temp
% Outdoor air =
Outdoor Temp –
Return Air Temp

SUPPLY AIR
TEMPERATURE
SENSOR
MOUNTING
LOCATION

SUPPLY AIR
TEMPERATURE
SENSOR

Fig. 34 — Supply-Air Sensor Placement

CO2 Control Setup — If a CO2 sensor is not being used, proceed to the next section. If a CO2 sensor is being used, perform
the following:
1. Determine the value at which you want the minimum position of the dampers to begin opening to allow a greater
amount of outdoor air to enter. The range is 800 to
1,400 ppm.
2. Locate the CO2 SP (PPM) potentiometer and adjust to the
desired set point. See Fig. 35.
Mechanical Cooling Lockout — Determine the outdoor-air
temperature at which you want the mechanical cooling (compressors) to be disabled. Locate the mechanical cooling lockout
(MECH CLG LOCKOUT) potentiometer. To disable this feature, turn the potentiometer counterclockwise (CCW) to the
OFF position. Otherwise, set the value between 10 and 60 F.
Mechanical cooling will not operate when the outdoor air
temperature is below this value. See Fig. 35.
Dry Bulb Changeover Set Up — Determine the dry bulb
changeover set point from Table 3. The settings are A, B, C and
D. Locate the ECON SP potentiometer and set the dry bulb
changeover set point. See Fig. 35. When the OAT is above this
set point, the damper is limited to minimum position setting.

b. Divide total CFM by percentage outdoor air, this
gives outdoor air volume in CFM.
5. Turn on base unit power.
NOTE: The EconoMi$er begins operation three minutes after
power up.

Personal Injury Hazard. Avoid possible injury by keeping fingers away from damper blades.
6. See Fig. 36 for barometric relief damper characteristics.

Table 3 — Changeover Set Points
A
73
27
2
1

B
69
25
2
1

C
66
24
2
1

D
63
22
2
1

Fig. 35 — EconoMi$er Control Adjustment
Potentiometers (Factory Settings)
STATIC PRESSURE (IN.WG)

SETTINGS
Dry Bulb (°F)
Single Enthalpy* (Btu/lb)
Differential Temperature* (°F, Not Adjustable)
Differential Enthalpy* (Btu/lb, Not Adjustable)

*Field-installed accessory.

If a potentiometer fails, its setting will default to the values
in Table 4.
Table 4 — Default Potentiometer Settings
POTENTIOMETER
CO2 SP (PPM)
MECH CLG LOCKOUT
ECON SP
MIN POS (%)

DEFAULT SETTING
1,000
47°
D
20

0.5
0.4
0.3
0.2
0.1
0
0

400

800

1200

1600

2000

2400

FLOW (CUBIC FEET/MINUTE)

Fig. 36 — Barometric Relief Capacity

18

Step 9 — Adjust Evaporator-Fan Speed — Adjust evaporator-fan speed to meet jobsite conditions.
Tables 5A and 5B show fan rpm at motor pulley settings.
Tables 6 and 7 show maximum amp draw of belt-drive motor.
Table 8 shows motor nominal horsepower for evaporator-fan
motors. Refer to Tables 8-25 for performance data. See Tables
26 and 27 for accessory and option static pressure drops.
BELT-DRIVE MOTORS — Fan motor pulleys are factory set
for speed shown in Table 1. Check pulley alignment and belt
tension prior to start-up.
NOTE: Before adjusting fan speed, make sure the new fan
speed will provide an air temperature rise range as shown in
Table 1.
To change fan speed:
1. Shut off unit power supply, tag disconnect.
2. Loosen belt by loosening fan motor mounting nuts. See
Fig. 37.
3. Loosen movable pulley flange setscrew (see Fig. 38).
4. Screw movable flange toward fixed flange to increase
speed and away from fixed flange to decrease speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Table 1.
5. Set movable flange at nearest keyway of pulley hub and
tighten setscrew. (See Table 1 for speed change for each
full turn of pulley flange.)
To align fan and motor pulleys, loosen fan pulley setscrews
and slide fan pulley along fan shaft. Make angular alignment
by loosening motor from mounting.
To adjust belt tension:
1. Loosen fan motor mounting nuts.
2. Slide motor mounting plate away from fan scroll for
proper belt tension (1/2-in. deflection with 8 to 10 lbs of
force) and tighten mounting nuts.
3. Adjust lock bolt and nut on mounting plate to secure motor in fixed position.

MOTOR MOUNTING
PLATE NUTS

Fig. 37 — Belt-Drive Motor Mounting

Fig. 38 — Evaporator-Fan Pulley Adjustment

19

Table 5A — 48HJ Fan Rpm at Motor Pulley Setting With Standard Motor
STANDARD MOTOR*
UNIT
48HJ
004
005
006
(single-phase)
006 (3-phase)
and 007

1055
1150

1
1025
1115

11/2
990
1080

MOTOR PULLEY TURNS OPEN
2
21 / 2
3
31/2
4
960
925
890
860
825
1045
1015
980
945
910

1460

1425

1385

1350

1315

1275

1240

1205

1585

1540

1490

1445

1400

1350

1305

1260

0
1090
1185

1/
2

41/2
795
875

5
760
840

51 / 2
—
—

6
—
—

1165

1130

1095

1055

1020

1210

1165

1120

—

—

*Approximate fan rpm shown (standard motor/drive).

Table 5B — 48HJ Fan Rpm at Motor Pulley Setting With High Static Motor
HIGH-STATIC MOTOR
UNIT
48HJ
004
005
006
007

0
1455
1455
1685
1685

1/

2

1423
1423
1589
1589

1
1392
1392
1557
1557

11/2
1360
1360
1525
1525

2
1328
1328
1493
1493

MOTOR PULLEY TURNS OPEN
21 / 2
3
31 / 2
1297
1265
1233
1297
1265
1233
1460
1428
1396
1460
1428
1396

4
1202
1202
1364
1364

41/2
1170
1170
1332
1332

5
1138
1138
1300
1300

51 / 2
1107
1107
—
—

6
1075
1075
—
—

Table 6 — Evaporator-Fan Motor Data — Standard Motor
UNIT
48HJ

004

005

006

007

UNIT
PHASE
Single

MAXIMUM
CONTINUOUS BHP*
1.20

MAXIMUM
OPERATING WATTS*
1000

Three

1.20

1000

Single

1.20

1000

Three

1.20

1000

Single

1.30

1650

Three

2.40

2120

Three

2.40

2120

LEGEND
Bhp — Brake Horsepower

UNIT VOLTAGE
208/230
208/230
460
575
208/230
208/230
460
575
208/230
208/230
460
575
208/230
460
575

MAXIMUM
AMP DRAW
5.4
5.4
2.4
2.4
5.4
5.4
2.4
2.4
9.7
6.4
2.9
2.9
6.4
2.9
2.9

*Extensive motor and electrical testing on these units ensures that
the full horsepower and watts range of the motors can be utilized
with confidence. Using your fan motors up to the ratings shown in
this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

Table 7 — Evaporator-Fan Motor Data — High-Static Motors
UNIT
48HJ

UNIT
PHASE

MAXIMUM
CONTINUOUS BHP*

MAXIMUM
OPERATING WATTS*

004

Three

2.40

2120

005

Three

2.40

2120

006

Three

2.90

2615

007

Three

2.90

2615

LEGEND
Bhp — Brake Horsepower

UNIT VOLTAGE
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575

MAXIMUM
AMP DRAW
6.4
2.9
2.9
6.4
2.9
2.9
7.9
3.6
3.6
6.4
3.6
3.6

*Extensive motor and electrical testing on these units ensures that
the full horsepower and watts range of the motors can be utilized
with confidence. Using your fan motors up to the ratings shown in
this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

20

Table 8 — Motor Nominal Horsepower
UNIT 48HJ
004
005

MOTOR
All
All
Single Phase
Three Phase
All

006
007

NOMINAL HORSEPOWER
1.00
1.00
1.50
2.00
2.00

Table 9 — Outdoor Sound Power (Total Unit)
ARI
RATING
(Bels)
7.6
004,005
8.0
006,007
UNIT
48HJ

OCTAVE BANDS
63

125

250

500

1000

2000

4000

8000

55.9
59.1

66.0
68.9

64.0
68.7

66.2
71.9

68.4
74.0

64.5
68.9

61.7
65.7

57.3
59.0

LEGEND
ARI — Air Conditioning and Refrigeration Institute
Bels — Sound Levels (1 bel = 10 decibels)

Table 10 — 48HJ004 Fan Performance — Vertical Discharge Units With Standard Motor
AIRFLOW
(Cfm)

0.1
Rpm
581
644
687
733
754
810
841

900
1000
1100
1200
1300
1400
1500
AIRFLOW
(Cfm)

Bhp
0.12
0.19
0.22
0.26
0.29
0.35
0.42

900
1000
1100
1200
1300
1400
1500

Rpm
673
709
746
785
826
868
911

0.7
Rpm
957
992
1013
1045
1075
1110
1150

Bhp
0.18
0.22
0.26
0.32
0.38
0.45
0.53

EXTERNAL STATIC PRESSURE (in. wg)
0.3
0.4
Rpm
Bhp
Rpm
Bhp
736
0.22
805
0.25
782
0.28
835
0.30
806
0.30
867
0.35
843
0.35
903
0.41
891
0.43
942
0.48
937
0.51
984
0.57
985
0.61
1029
0.66

Rpm
865
900
929
960
991
1032
1073

Bhp
0.43
0.49
0.55
0.64
0.70
0.78
0.84

EXTERNAL STATIC PRESSURE (in. wg)
0.9
1.0
Rpm
Bhp
Rpm
Bhp
1039
0.47
1061
0.51
1061
0.55
1088
0.60
1091
0.61
1109
0.66
1109
0.68
1156
0.73
1152
0.76
1190
0.82
1181
0.83
1237
0.88
1225
0.89
1271
0.95

Rpm
1083
1111
1127
1203
1228
1293
1371

0.2

0.8
Bhp
0.39
0.44
0.49
0.56
0.64
0.73
0.78

Rpm
988
1039
1068
1090
1122
1160
1190

0.5

0.6
Bhp
0.29
0.35
0.40
0.47
0.53
0.62
0.72

Rpm
911
937
964
994
1047
1067
1109

Bhp
0.54
0.66
0.73
0.81
0.87
0.94
1.00

Rpm
1105
1136
1145
1250
1266
1349
1383

1.1

Bhp
0.34
0.38
0.40
0.50
0.60
0.67
0.77

1.2
Bhp
0.58
0.72
0.80
0.86
0.94
0.99
1.05

Table 11 — 48HJ004 Fan Performance — Vertical Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500

0.2
Rpm
673
709
746
785
826
868
911

AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500

0.4
Bhp
0.18
0.22
0.28
0.32
0.38
0.45
0.53

Rpm
805
835
867
903
942
984
1029

1.2
Rpm
1105
1136
1145
1210
1266
1349
1363

1.4
Bhp
0.57
0.63
0.67
0.74
0.84
0.93
1.05

Rpm
1140
1172
1181
1248
1306
1391
1406

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Bhp
Rpm
Bhp
Rpm
0.25
911
0.34
988
0.30
937
0.38
1039
0.35
964
0.40
1068
0.41
994
0.50
1090
0.48
1047
0.60
1122
0.57
1087
0.67
1160
0.66
1109
0.77
1190
EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
0.63
1170
0.68
1198
0.69
1203
0.75
1232
0.73
1213
0.80
1242
0.81
1282
0.88
1312
0.92
1341
1.00
1373
1.02
1429
1.11
1463
1.15
1465
1.25
1500

0.8

1.0
Bhp
0.43
0.49
0.55
0.64
0.70
0.84
1.00

Rpm
1061
1086
1109
1156
1190
1237
1271

Bhp
0.73
0.80
0.85
0.94
1.07
1.19
1.34

Rpm
1224
1258
1268
1340
1402
1494
1532

1.8

Bhp
0.47
0.55
0.61
0.68
0.76
0.85
0.95

2.0
Bhp
0.77
0.86
0.91
1.01
1.14
1.26
1.43

LEGEND AND NOTES FOR TABLES 10 AND 11
4. Maximum continuous bhp is 1.20 for standard motor, 2.40 for high-static
motor. Extensive motor and electrical testing on these units ensures that
Bhp —
the full range of the motor can be utilized with confidence. Using your
FIOP —
fan motors up to the ratings shown will not result in nuisance tripping
or premature motor failure. Unit warranty will not be affected. See
NOTES:
Evaporator-Fan Motor Data tables on page 20 for additional information.
1. Boldface indicates field-supplied drive required. (See Note 2.)
5. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
2. Motor drive range is 760 to 1090 rpm for standard motor; 1075 to 1455
representative to verify.
rpm for high-static motor. All other rpms require a field-supplied drive.
6. Interpolation is permissible. Do not extrapolate.
3. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
LEGEND
Brake Horsepower Input to Fan
Factory-Installed Option

21

Table 12 — 48HJ005 Fan Performance — Vertical Discharge Units With Standard Motor
AIRFLOW
(Cfm)

0.1
Rpm
596
633
672
711
751
791
831
872
913

1200
1300
1400
1500
1600
1700
1800
1900
2000

AIRFLOW
(Cfm)

Bhp
0.20
0.24
0.30
0.35
0.42
0.49
0.58
0.67
0.77

Rpm
665
699
735
770
835
873
881
919
958

0.9
Rpm
993
1021
1049
1077
1107
1137
1167
1197
1229

1200
1300
1400
1500
1600
1700
1800
1900
2000

Rpm
722
754
788
822
871
907
929
965
1002

EXTERNAL STATIC PRESSURE (in. wg)
0.3
0.4
0.6
Bhp
Rpm
Bhp
Rpm
0.31
779
0.36
872
0.36
809
0.42
902
0.42
840
0.48
933
0.49
873
0.55
963
0.56
907
0.63
993
0.65
941
0.72
1024
0.74
976
0.81
1057
0.84
1011
0.92
1091
0.95
1046
1.03
1125

Bhp
0.48
0.55
0.62
0.69
0.77
0.87
0.97
1.08
1.21

Rpm
915
943
972
1002
1033
1064
1095
1127
1160

Rpm
1056
1090
1120
1147
1174
1203
1233
1263
1294

EXTERNAL STATIC PRESSURE (in. wg)
1.1
1.2
1.4
Bhp
Rpm
Bhp
Rpm
0.72
1083
0.74
1134
0.85
1121
0.89
1171
0.96
1153
1.00
1210
1241
1.06
1180
1.13
1207
1.25
1269
1.17
1.29
1235
1.37
1296
1.41
1263
1.49
1323
1.54
1294
1.63
1351
1.68
1325
1.78
1362

Bhp
0.80
0.94
1.12
1.27
1.40
1.53
1.67
1.81
1.97

Rpm
1185
1219
1257
1295
1326
1354
1381
1408
1436

0.2
Bhp
0.25
0.30
0.36
0.42
0.49
0.57
0.66
0.75
0.86

1.0
Bhp
0.65
0.74
0.82
0.92
1.00
1.12
1.23
1.35
1.48

Rpm
1028
1058
1086
1113
1141
1171
1202
1232
1262

Bhp
0.69
0.80
0.89
0.99
1.09
1.20
1.32
1.45
1.58

0.7

0.8
Bhp
0.54
0.61
0.69
0.77
0.85
0.96
1.06
1.17
1.30

Rpm
957
984
1011
1041
1072
1103
1132
1162
1195

Bhp
0.88
1.00
1.17
1.37
1.54
1.70
1.85
2.00
2.16

Rpm
1331
1268
1307
1339
1376
1407
1436
1463
1489

1.6

Bhp
0.60
0.67
0.75
0.84
0.93
1.04
1.14
1.25
1.38

1.8
Bhp
0.99
1.10
1.25
1.43
1.65
1.84
2.02
2.19
2.36

Table 13 — 48HJ005 Fan Performance — Vertical Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000

0.2
Rpm
665
699
735
770
835
873
881
919
958

AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000

0.4
Bhp
0.25
0.30
0.36
0.42
0.49
0.57
0.66
0.75
0.86

Rpm
779
809
840
873
907
941
976
1011
1046

1.2
Rpm
1083
1121
1153
1180
1207
1235
1263
1294
1325

1.4
Bhp
0.74
0.89
1.00
1.13
1.25
1.37
1.49
1.63
1.78

Rpm
1134
1171
1210
1241
1269
1296
1323
1351
1362

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Bhp
Rpm
Bhp
Rpm
0.36
872
0.48
957
0.42
902
0.55
984
0.48
933
0.62
1011
0.55
963
0.69
1041
0.63
993
0.77
1072
0.72
1024
0.87
1103
0.81
1057
0.97
1132
0.92
1091
1.08
1162
1.03
1125
1.21
1195

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
0.80
1185
0.88
1331
0.94
1219
1.00
1268
1.12
1257
1.17
1307
1.27
1295
1.37
1339
1.40
1326
1.54
1376
1.53
1354
1.70
1407
1.67
1381
1.85
1436
1.81
1408
2.00
1463
1.97
1436
2.16
1489

0.8

1.0
Bhp
0.60
0.67
0.75
0.84
0.93
1.04
1.14
1.25
1.38

Rpm
1028
1058
1086
1113
1141
1171
1202
1232
1262

Bhp
0.99
1.10
1.25
1.43
1.65
1.84
2.02
2.19
2.36

Rpm
1374
1309
1349
1382
1420
1452
1482
—
—

1.8

Bhp
0.69
0.80
0.89
0.99
1.09
1.20
1.32
1.45
1.58

2.0
Bhp
1.09
1.21
1.37
1.57
1.81
2.02
2.22
—
—

LEGEND AND NOTES FOR TABLES 12 AND 13
4. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
Bhp — Brake Horsepower Input to Fan
5. Maximum continuous bhp is 1.2 for standard motor, 2.4 for high-static
FIOP — Factory-Installed Option
motor. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your
NOTES:
fan motors up to the ratings shown will not result in nuisance tripping or
1. Boldface indicates field-supplied drive required. (See Note 3.)
premature motor failure. Unit warranty will not be affected. See Evaporator-Fan Motor Data tables on page 20 for additional information.
2.
indicates field-supplied motor and drive required.
6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
3. Motor drive range is 840 to 1185 rpm for standard motor; 1075 to
representative to verify.
1455 rpm for high-static motor. All other rpms require a field-supplied
7. Interpolation is permissible. Do not extrapolate.
drive.
LEGEND

22

Table 14 — 48HJ006 Fan Performance — Vertical Discharge Units With Standard Motor
Single-Phase Units
AIRFLOW
(Cfm)

0.1
Rpm
771
816
902
942
982
1022
1063
1104
1130
1174
1201

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

Bhp
0.37
0.45
0.61
0.70
0.80
0.91
0.99
1.13
1.26
1.37
1.48

0.2
Rpm
828
869
940
978
1023
1068
1115
1159
1202
1237
1272

0.4
Rpm
935
968
1007
1063
1097
1132
1180
1214
1248
1292
1335

Bhp
0.44
0.51
0.60
0.66
0.78
0.90
1.00
1.15
1.29
1.41
1.53

Bhp
0.58
0.66
0.75
0.82
0.91
1.01
1.17
1.28
1.38
1.55
1.71

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1027
0.73
1107
0.88
1185
1.04
1056
0.81
1127
0.97
1215
1.14
1094
0.91
1175
1.09
1245
1.26
1322
1.33
1147
0.97
1248
1.20
1175
1.11
1266
1.29
1356
1.47
1303
1.41
1397
1.52
1218
1.23
1261
1.35
1340
1.53
1428
1.66
1310
1.52
1375
1.63
1459
1.80
1358
1.69
1410
1.72
1488
1.93
1392
1.81
1460
1.90
1532
2.14
1427
1.94
1518
2.16
1575
2.35

1.2
Rpm
Bhp
1257
1.20
1286
1.31
1315
1.44
1395
1.46
1430
1.58
1459
1.67
1489
1.80
1528
1.95
1561
2.13
1584
2.28
1633
2.53

1.4
Rpm
Bhp
1330
1.38
1353
1.49
1381
1.52
1475
1.56
1504
1.69
1532
1.82
1567
1.99
1603
2.17
1637
2.35
1671
2.55
1698
2.72

1.6
Rpm
Bhp
1411
1.59
1421
1.68
1443
1.69
1542
1.71
1556
1.82
1588
1.97
1626
2.16
1666
2.37
1710
2.54
1756
2.70
—
—

1.2
Rpm
Bhp
1257
1.20
1286
1.31
1315
1.44
1395
1.46
1430
1.58
1459
1.67
1489
1.80
1528
1.95
1561
2.13
1584
2.28
1633
2.53

1.4
Rpm
Bhp
1330
1.38
1353
1.49
1381
1.52
1475
1.56
1504
1.69
1532
1.82
1567
1.99
1603
2.17
1637
2.35
1671
2.55
1698
2.72

1.6
Rpm
Bhp
1411
1.59
1421
1.68
1443
1.69
1542
1.71
1556
1.82
1588
1.97
1626
2.16
1666
2.37
1710
2.54
1756
2.70
—
—

3-Phase Units
AIRFLOW
(Cfm)

0.1
Rpm
771
816
902
942
982
1022
1063
1104
1130
1174
1201

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

Bhp
0.37
0.45
0.61
0.70
0.80
0.91
0.99
1.13
1.26
1.37
1.48

0.2
Rpm
828
869
940
978
1023
1068
1115
1159
1202
1237
1272

0.4
Rpm
935
968
1007
1063
1097
1132
1180
1214
1248
1292
1335

Bhp
0.44
0.51
0.60
0.66
0.78
0.90
1.00
1.15
1.29
1.41
1.53

Bhp
0.58
0.66
0.75
0.82
0.91
1.01
1.17
1.28
1.38
1.55
1.71

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1027
0.73
1107
0.88
1185
1.04
1056
0.81
1127
0.97
1215
1.14
1094
0.91
1175
1.09
1245
1.26
1147
0.97
1248
1.20
1322
1.33
1175
1.11
1266
1.29
1356
1.47
1218
1.23
1303
1.41
1397
1.52
1261
1.35
1340
1.53
1428
1.66
1310
1.52
1375
1.63
1459
1.80
1358
1.69
1410
1.72
1488
1.93
1392
1.81
1460
1.90
1532
2.14
1427
1.94
1518
2.16
1575
2.35

Table 15 — 48HJ006 Fan Performance — Vertical Discharge Units With High-Static Motor
AIRFLOW
(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)
0.4
0.6
Rpm
Bhp
Rpm
Bhp
914
0.56
1001
0.69
950
0.64
1034
0.78
983
0.72
1068
0.88
1018
0.82
1105
0.98
1057
0.92
1143
1.10
1096
1.04
1177
1.22
1136
1.17
1210
1.35
1173
1.30
1245
1.49
1210
1.47
1284
1.65
1249
1.61
1323
1.80
1289
1.78
1363
2.00

0.2
Rpm
808
846
884
924
965
1008
1051
1095
1140
1185
1231

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

AIRFLOW
(Cfm)

1.2
Rpm
1199
1263
1295
1319
1343
1374
1409
1442
1475
1565
1596

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

Bhp
0.42
0.49
0.57
0.66
0.76
0.87
0.99
1.12
1.26
1.41
1.57

1.4
Bhp
1.19
1.28
1.39
1.52
1.64
1.77
1.91
2.08
2.26
2.47
2.95

Rpm
1126
1275
1351
1389
1415
1438
1465
1498
1554
1649
1682

0.8
Rpm
1084
1111
1145
1179
1212
1247
1284
1322
1356
1389
1424

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
1.46
1250
1.69
1301
1.49
1299
1.78
1352
1.58
1352
1.80
1407
1.71
1435
1.91
1494
1.80
1478
2.05
1538
1.99
1505
2.21
1566
2.14
1533
2.45
1596
1632
2.30
1568
2.64
1627
3.03
1693
2.64
2.89
1726
3.31
—
3.45
1760
3.96
—

1.0
Bhp
0.85
0.94
1.03
1.13
1.26
1.40
1.54
1.70
1.80
2.03
2.22

Rpm
1168
1194
1218
1246
1280
1300
1347
1380
1418
1456
1500

1.8

Bhp
1.01
1.11
1.21
1.32
1.43
1.57
1.72
1.89
2.07
2.26
2.45

2.0
Bhp
1.91
2.01
2.03
2.15
2.31
2.49
2.77
2.97
3.42
—
—

Rpm
1349
1401
1459
1548
1594
1624
1654
1691
1755
—
—

Bhp
2.12
2.23
2.26
2.40
2.57
2.77
3.08
3.31
3.81
—
—

LEGEND AND NOTES FOR TABLES 14 AND 15
4. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
Bhp
— Brake Horsepower Input to Fan
5. Maximum continuous bhp is 1.30 for single-phase standard motors, 2.40
FIOP — Factory-Installed Option
for 3-phase standard motors, and 2.90 for high-static motors. Extensive
motor and electrical testing on these units ensures that the full range of
NOTES:
the motor can be utilized with confidence. Using your fan motors up to
1. Boldface indicates field-supplied drive required. (See Note 3.)
the ratings shown will not result in nuisance tripping or premature motor
failure. Unit warranty will not be affected. See Evaporator-Fan Motor
2.
indicates field-supplied motor and drive required.
Data tables on page 20 for additional information.
3. Motor drive range is 1020 to 1460 rpm for single-phase standard
6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
motors, 1120 to 1585 for 3-phase standard motors, and 1300 to 1685 for
representative to verify.
high-static motors. All other rpms require a field-supplied drive.
7. Interpolation is permissible. Do not extrapolate.

LEGEND

23

Table 16 — 48HJ007 Fan Performance — Vertical Discharge Units With Standard Motor
AIRFLOW
(Cfm)

0.1
Rpm
942
982
1022
1063
1104
1130
1174
1201
1246
1285
1304
1345
1378

1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000

Bhp
0.70
0.80
0.91
0.99
1.13
1.26
1.37
1.48
1.62
1.75
1.87
2.07
2.26

0.2
Rpm
978
1023
1068
1115
1159
1202
1237
1272
1320
1361
1402
1446
1489

Bhp
0.66
0.78
0.90
1.00
1.15
1.29
1.41
1.53
1.68
1.82
1.95
2.16
2.36

0.4
Rpm
Bhp
1063
0.82
1097
0.91
1132
1.01
1180
1.17
1214
1.28
1248
1.38
1292
1.55
1335
1.71
1368
1.81
1400
1.91
1439
2.08
1477
2.16
1529
2.52

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1147
0.97
1248
1.20
1322
1.33
1175
1.11
1266
1.29
1356
1.47
1218
1.23
1303
1.41
1397
1.52
1261
1.35
1340
1.53
1428
1.66
1310
1.52
1375
1.63
1459
1.80
1358
1.69
1410
1.72
1488
1.93
1392
1.81
1460
1.90
1532
2.14
1427
1.94
1518
2.16
1575
2.35
1458
2.06
1562
2.42
1620
2.59
1602
2.64
1666
2.85
1490
2.19
1543
2.43
1642
2.86
—
—
1585
2.65
—
—
—
—
1598
2.73
—
—
—
—

1.2
Rpm
Bhp
1395
1.46
1430
1.58
1459
1.67
1489
1.80
1528
1.95
1561
2.13
1584
2.28
1633
2.53
1675
2.77
—
—
—
—
—
—
—
—

1.4
Rpm
Bhp
1475
1.56
1504
1.69
1532
1.82
1567
1.99
1603
2.17
1637
2.35
1671
2.55
1698
2.72
—
—
—
—
—
—
—
—
—
—

1.6
Rpm
Bhp
1542
1.71
1556
1.82
1588
1.97
1626
2.16
1666
2.37
1710
2.54
1756
2.70
—
—
—
—
—
—
—
—
—
—
—
—

Table 17 — 48HJ007 Fan Performance — Vertical Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000

AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000

0.2
Rpm
978
1023
1068
1115
1159
1202
1237
1272
1320
1361
1402
1446
1489

0.4
Bhp
0.66
0.78
0.90
1.00
1.15
1.29
1.41
1.53
1.68
1.82
1.95
2.16
2.36

Rpm
1063
1097
1132
1180
1214
1248
1292
1335
1368
1400
1439
1477
1529

1.2
Rpm
1395
1430
1459
1489
1528
1561
1584
1633
1675
1776
—
—
—

1.4
Bhp
1.46
1.58
1.67
1.80
1.95
2.13
2.28
2.53
2.77
3.45
—
—
—

Rpm
1475
1504
1532
1567
1603
1637
1671
1698
1768
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Bhp
Rpm
Bhp
Rpm
0.82
1147
0.97
1248
0.91
1175
1.11
1266
1.01
1218
1.23
1303
1.17
1261
1.35
1340
1.28
1310
1.52
1375
1.38
1358
1.69
1410
1.55
1392
1.81
1460
1.71
1427
1.94
1518
1.81
1458
2.06
1562
1.91
1490
2.19
1602
2.08
1543
2.43
1642
1753
2.16
1585
2.65
1767
2.52
1598
2.73

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
1.56
1542
1.71
1607
1.69
1556
1.82
1621
1.82
1588
1.97
1655
1.99
1626
2.16
1694
2.17
1666
2.37
1736
2.35
1710
2.54
1782
2.55
1756
2.70
—
1779
3.13
—
2.72
3.26
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

0.8

1.0
Bhp
1.20
1.29
1.41
1.53
1.63
1.72
1.90
2.16
2.42
2.64
2.86
3.58
3.69

Rpm
1322
1356
1397
1428
1459
1488
1532
1575
1620
1666
1775
—
—

Bhp
1.94
2.06
2.23
2.44
2.68
2.87
—
—
—
—
—
—
—

Rpm
1667
1682
1717
1758
—
—
—
—
—
—
—
—
—

1.8

Bhp
1.33
1.47
1.52
1.66
1.80
1.93
2.14
2.35
2.59
2.85
3.62
—
—

2.0
Bhp
2.16
2.30
2.49
2.73
—
—
—
—
—
—
—
—
—

LEGEND AND NOTES FOR TABLES 16 AND 17
4. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
Bhp
—
5. Maximum continuous bhp is 2.40 for standard motors, 2.90 for highFIOP —
static motors. Extensive motor and electrical testing on these units
ensures that the full range of the motor can be utilized with confidence.
NOTES:
Using your fan motors up to the ratings shown will not result in nuisance
1. Boldface indicates field-supplied drive required. (See Note 3.)
tripping or premature motor failure. Unit warranty will not be affected.
See Evaporator-Fan Motor Data tables on page 20 for additional infor2.
indicates field-supplied motor and drive required.
mation.
3. Motor drive range is 1120 to 1585 rpm for standard motors, 1130 to
6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
1685 rpm for high-static motors. All other rpms require a field-supplied
representative to verify.
drive.
7. Interpolation is permissible. Do not extrapolate.
LEGEND
Brake Horsepower Input to Fan
Factory-Installed Option

24

Table 18 — 48HJ004 Fan Performance — Horizontal Discharge Units With Standard Motor
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500

0.1
Rpm
526
570
614
658
703
725
755

AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500

Bhp
0.06
0.09
0.13
0.16
0.20
0.29
0.33

Rpm
584
627
670
710
752
776
816

0.7
Rpm
924
936
960
988
1012
1027
1056

Bhp
0.08
0.13
0.16
0.23
0.27
0.31
0.38

EXTERNAL STATIC PRESSURE (in. wg)
0.3
0.4
Rpm
Bhp
Rpm
Bhp
656
0.12
734
0.22
738
0.19
800
0.26
758
0.23
812
0.29
780
0.28
840
0.32
808
0.32
868
0.37
845
0.38
891
0.42
870
0.43
924
0.48

Rpm
818
848
863
889
916
937
969

Bhp
0.35
0.39
0.43
0.50
0.56
0.60
0.68

EXTERNAL STATIC PRESSURE (in. wg)
0.9
1.0
Rpm
Bhp
Rpm
Bhp
989
0.38
1028
0.42
1020
0.44
1064
0.48
1052
0.49
1100
0.52
1076
0.53
1136
0.59
1094
0.61
1172
0.65
1108
0.67
1208
0.70
1117
0.70
1245
0.74

Rpm
1074
1124
1163
1201
1239
1278
1315

0.2

0.8
Bhp
0.32
0.35
0.39
0.45
0.51
0.56
0.63

Rpm
953
977
1005
1038
1061
1071
1097

0.5

0.6
Bhp
0.25
0.29
0.32
0.36
0.41
0.47
0.53

Rpm
875
895
914
938
963
983
1014

Bhp
0.45
0.52
0.56
0.61
0.69
0.75
0.80

Rpm
1120
1185
1225
1266
1306
1347
1385

1.1

Bhp
0.27
0.31
0.35
0.40
0.45
0.51
0.58

1.2
Bhp
0.50
0.55
0.60
0.64
0.72
0.79
0.85

Table 19 — 48HJ004 Fan Performance — Horizontal Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500

0.2
Rpm
584
627
670
710
752
776
816

AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500

0.4
Bhp
0.08
0.13
0.16
0.23
0.27
0.31
0.38

Rpm
734
800
812
840
868
891
924

1.2
Rpm
1120
1185
1225
1266
1306
1347
1385

1.4
Bhp
0.54
0.60
0.65
0.72
0.79
0.87
0.96

Rpm
1155
1222
1263
1306
1347
1389
1428

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Bhp
Rpm
Bhp
Rpm
0.22
875
0.27
953
0.26
895
0.31
977
0.29
914
0.35
1005
0.32
938
0.40
1038
0.37
963
0.45
1061
0.42
983
0.51
1071
0.48
1014
0.58
1097
EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
0.59
1186
0.64
1215
0.66
1255
0.71
1285
0.71
1298
0.77
1328
0.79
1341
0.86
1373
0.87
1383
0.94
1416
0.95
1427
1.03
1461
1.05
1467
1.14
1502

0.8

1.0
Bhp
0.36
0.39
0.43
0.50
0.56
0.60
0.68

Rpm
1028
1064
1100
1136
1172
1208
1245

Bhp
0.69
0.77
0.83
0.92
1.01
1.11
1.22

Rpm
1240
1312
1357
1402
1446
1492
1534

1.8

Bhp
0.42
0.48
0.52
0.59
0.65
0.70
0.74

2.0
Bhp
0.73
0.82
0.88
0.98
1.07
1.18
1.30

LEGEND AND NOTES FOR TABLES 18 AND 19
4. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See EvaporatorNOTES:
Fan Motor Data tables on page 20 for additional information.
1. Boldface indicates field-supplied drive required. (See Note 3.)
5.
Use of a field-supplied motor may affect wire sizing. Contact your Carrier
2. Motor drive range is 760 to 1090 rpm for standard motors; 1075 to
representative to verify.
1455 rpm for high-static motors. All other rpms require a field-supplied
6. Interpolation is permissible. Do not extrapolate.
drive.
3. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
LEGEND
Bhp — Brake Horsepower Input to Fan
FIOP — Factory-Installed Option

25

Table 20 — 48HJ005 Fan Performance — Horizontal Discharge Units With Standard Motor
AIRFLOW
(Cfm)

0.1
Rpm
569
604
640
676
713
750
788
826
864

1200
1300
1400
1500
1600
1700
1800
1900
2000

AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000

Bhp
0.18
0.22
0.27
0.32
0.38
0.45
0.52
0.60
0.70

Rpm
641
673
705
738
772
806
841
876
912

0.9
Rpm
987
1006
1033
1060
1087
1114
1141
1168
1197

Rpm
701
731
761
793
825
857
890
924
958

EXTERNAL STATIC PRESSURE (in. wg)
0.3
0.4
0.6
Bhp
Rpm
Bhp
Rpm
0.29
761
0.34
859
0.34
788
0.39
887
0.39
817
0.45
914
0.45
847
0.51
940
0.51
877
0.58
967
0.59
908
0.66
997
0.67
939
0.75
1026
0.76
971
0.84
1056
0.86
1004
0.94
1087

Bhp
0.46
0.52
0.59
0.65
0.73
0.81
0.91
1.01
1.12

Rpm
901
928
955
982
1009
1037
1065
1094
1125

Rpm
1068
1086
1104
1129
1156
1183
1211
1238
1265

EXTERNAL STATIC PRESSURE (in. wg)
1.1
1.2
1.4
Bhp
Rpm
Bhp
Rpm
0.79
1106
0.87
1134
0.84
1128
0.91
1183
0.93
1139
1.01
1218
1228
1.02
1162
1.09
1250
1.13
1185
1.20
1.23
1215
1.31
1276
1.35
1243
1.43
1303
1.47
1271
1.56
1330
1.59
1298
1.69
1358

Bhp
0.98
1.10
1.14
1.24
1.35
1.48
1.61
1.74
1.89

Rpm
1189
1226
1286
1303
1319
1334
1359
1386
1413

0.2
Bhp
0.23
0.28
0.33
0.38
0.44
0.51
0.59
0.68
0.77

1.0
Bhp
0.64
0.71
0.79
0.88
1.01
1.07
1.17
1.28
1.39

Rpm
1030
1044
1069
1095
1123
1151
1178
1204
1231

Bhp
0.70
0.77
0.86
0.95
1.05
1.15
1.26
1.37
1.48

0.7

0.8
Bhp
0.52
0.59
0.66
0.73
0.81
0.90
1.01
1.10
1.21

Rpm
943
968
996
1024
1051
1077
1104
1132
1162

Bhp
1.12
1.23
1.34
1.40
1.51
1.64
1.78
1.93
2.08

Rpm
1245
1297
1320
1343
1382
1398
1418
1439
1466

1.6

Bhp
0.58
0.65
0.72
0.81
0.89
1.01
1.07
1.18
1.30

1.8
Bhp
1.21
1.35
1.48
1.60
1.68
1.80
1.95
2.11
2.27

Table 21 — 48HJ005 Fan Performance — Horizontal Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000

0.2
Rpm
641
673
705
738
772
806
841
876
912

AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000

0.4
Bhp
0.23
0.28
0.33
0.38
0.44
0.51
0.59
0.68
0.77

Rpm
761
788
817
847
877
908
939
971
1004

1.2
Rpm
1106
1128
1139
1162
1185
1215
1243
1271
1298

1.4
Bhp
0.87
0.91
1.01
1.09
1.20
1.31
1.43
1.56
1.69

Rpm
1134
1183
1218
1228
1250
1276
1303
1330
1358

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Bhp
Rpm
Bhp
Rpm
0.34
859
0.46
943
0.39
887
0.52
968
0.45
914
0.59
996
0.51
940
0.65
1024
0.58
967
0.73
1051
0.66
997
0.81
1077
0.75
1026
0.91
1104
0.84
1056
1.01
1132
0.94
1087
1.12
1162
EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
0.98
1189
1.12
1245
1.10
1226
1.23
1297
1.14
1286
1.34
1320
1.24
1303
1.40
1343
1.35
1319
1.51
1382
1.48
1334
1.64
1398
1.61
1359
1.78
1418
1.74
1386
1.93
1439
1.89
1413
2.08
1466

0.8

1.0
Bhp
0.58
0.65
0.72
0.81
0.89
1.01
1.07
1.18
1.30

Rpm
1030
1044
1069
1095
1123
1151
1178
1204
1231

1.8

Bhp
0.70
0.77
0.86
0.95
1.05
1.15
1.26
1.37
1.48

2.0
Bhp
1.21
1.35
1.48
1.60
1.68
1.80
1.95
2.11
2.27

Rpm
1292
1346
1370
1393
1434
1451
1471
1493
15.21

Bhp
1.35
1.51
1.65
1.79
1.88
2.01
2.18
2.36
2.54

LEGEND AND NOTES FOR TABLES 20 AND 21
5. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See EvaporatorNOTES:
Fan Motor Data tables on page 20 for additional information.
1. Boldface indicates field-supplied drive required. (See Note 3.)
6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
2.
indicates field-supplied motor and drive required.
representative to verify.
7. Interpolation is permissible. Do not extrapolate.
3. Motor drive range is 840 to 1185 rpm for standard units; 1075 to 1455 rpm
for high-static motors. All other rpms require a field-supplied drive.
4. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
LEGEND
Bhp — Brake Horsepower Input to Fan
FIOP — Factory-Installed Option

26

Table 22 — 48HJ006 Fan Performance — Horizontal Discharge Units With Standard Motor
Single-Phase Units
AIRFLOW
(Cfm)

0.1
Rpm
Bhp
741
0.38
783
0.45
825
0.53
885
0.63
928
0.73
971
0.84
1015
0.97
1060
1.10
1104
1.25
1138
1.30
1183
1.43

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

0.2
Rpm
Bhp
798
0.43
838
0.51
878
0.60
942
0.73
982
0.83
1022
0.94
1063
1.10
1104
1.20
1130
1.27
1174
1.37
1201
1.50

0.4
Rpm
Bhp
895
0.54
933
0.63
969
0.72
1047
0.90
1084
1.02
1121
1.12
1140
1.18
1159
1.23
1196
1.37
1245
1.57
1284
1.65

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
990
0.67
1073
0.80
1154
0.95
1016
0.75
1102
0.90
1182
1.04
1049
0.84
1134
1.00
1206
1.14
1139
1.05
1193
1.14
1276
1.30
1160
1.11
1223
1.24
1301
1.38
1254
1.36
1329
1.44
1188
1.22
1272
1.45
1354
1.58
1196
1.27
1229
1.41
1306
1.53
1363
1.70
1264
1.56
1340
1.66
1397
1.86
1305
1.63
1373
1.84
1440
1.95
1338
1.75
1402
1.99
1469
2.04

0.4
Rpm
Bhp
895
0.54
933
0.63
969
0.72
1047
0.90
1084
1.02
1121
1.12
1140
1.18
1159
1.23
1196
1.37
1245
1.57
1284
1.65

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
990
0.67
1073
0.80
1154
0.95
1016
0.75
1102
0.90
1182
1.04
1049
0.84
1134
1.00
1206
1.14
1139
1.05
1193
1.14
1276
1.30
1160
1.11
1223
1.24
1301
1.38
1188
1.22
1254
1.36
1329
1.44
1196
1.27
1272
1.45
1354
1.58
1229
1.41
1306
1.53
1363
1.70
1264
1.56
1340
1.66
1397
1.86
1305
1.63
1373
1.84
1440
1.95
1338
1.75
1402
1.99
1469
2.04

1.2
Bhp
1218
1251
1281
1341
1374
1396
1413
1434
1459
1502
1524

1.4
Rpm
1.12
1.20
1.31
1.40
1.53
1.66
1.75
1.81
1.88
2.06
2.24

Bhp
1295
1310
1342
1413
1437
1460
1475
1487
1520
1552
1585

Rpm
1.12
1.20
1.31
1.40
1.53
1.66
1.75
1.81
1.88
2.06
2.24

Bhp
1295
1310
1342
1413
1437
1460
1475
1487
1520
1552
1585

1.6
Rpm
1.36
1.40
1.48
1.55
1.62
1.68
1.73
1.85
2.07
2.24
2.42

Bhp
1360
1385
1398
1474
1490
1509
1529
1554
1576
1604
1638

Rpm
1.36
1.40
1.48
1.55
1.62
1.68
1.73
1.85
2.07
2.24
2.42

Bhp
1360
1385
1398
1474
1490
1509
1529
1554
1576
1604
1638

Rpm
1.40
1.49
1.53
1.58
1.67
1.77
1.92
2.07
2.24
2.42
2.60

3-Phase Units
AIRFLOW
(Cfm)

0.1
Rpm
Bhp
741
0.38
783
0.45
825
0.53
885
0.63
928
0.73
971
0.84
1015
0.97
1060
1.10
1104
1.25
1138
1.30
1183
1.43

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

0.2
Rpm
Bhp
798
0.43
838
0.51
878
0.60
942
0.73
982
0.83
1022
0.94
1063
1.10
1104
1.20
1130
1.27
1174
1.37
1201
1.50

1.2
Bhp
1218
1251
1281
1341
1374
1396
1413
1434
1459
1502
1524

1.4

1.6
Rpm
1.40
1.49
1.53
1.58
1.67
1.77
1.92
2.07
2.24
2.42
2.60

Table 23 — 48HJ006 Fan Performance — Horizontal Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

0.2
Rpm
789
826
865
905
945
984
1024
1064
1104
1145
1186

AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500

0.4
Bhp
0.40
0.46
0.54
0.62
0.72
0.82
0.93
1.05
1.18
1.32
1.48

Rpm
896
931
966
1002
1037
1072
1108
1145
1183
1222
1262

1.2
Rpm
1221
1252
1278
1303
1330
1362
1393
1423
1454
1485
1518

1.4
Bhp
1.17
1.27
1.37
1.48
1.59
1.73
1.87
2.02
2.18
2.36
2.55

Rpm
1256
1311
1345
1371
1396
1422
1452
1483
1515
1544
1574

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Bhp
Rpm
Bhp
Rpm
0.53
990
0.67
1072
0.61
1020
0.75
1101
0.69
1051
0.84
1133
0.78
1084
0.93
1163
0.88
1119
1.04
1194
0.98
1154
1.16
1226
1.10
1192
1.29
1259
1.22
1225
1.43
1294
1.36
1260
1.57
1330
1.45
1296
1.73
1365
1.68
1331
1.89
1400

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Bhp
Rpm
Bhp
Rpm
1.30
1283
1.32
1303
1.45
1340
1.58
1330
1.57
1397
1.76
1424
1.69
1433
1.90
1480
1.80
1460
2.03
1517
1.94
1485
2.16
1544
2.08
1510
2.31
1570
2.24
1538
2.46
1594
2.41
1571
2.64
1623
1657
2.59
1604
2.84
2.78
1633
3.03
1692

0.8

1.0
Bhp
0.83
0.91
1.01
1.10
1.21
1.33
1.47
1.62
1.78
1.94
2.12

Rpm
1153
1178
1205
1235
1266
1297
1327
1359
1392
1426
1461

Bhp
1.22
1.61
1.89
2.09
2.25
2.40
2.55
2.71
2.88
3.07
3.28

Rpm
1345
1373
1470
1528
1566
1594
1620
1645
1676
1710
1746

1.8

Bhp
1.00
1.09
1.18
1.29
1.40
1.53
1.66
1.80
1.97
2.15
2.34

2.0
Bhp
1.34
1.77
2.08
2.30
2.47
2.64
2.80
2.98
3.17
3.38
3.61

LEGEND AND NOTES FOR TABLES 22 AND 23
5. Maximum continuous bhp is 1.30 for single-phase standard units, 2.40 for
3-phase standard motors, and 2.90 for high-static motors. Extensive
motor and electrical testing on these units ensures that the full range of
the motor can be utilized with confidence. Using your fan motors up to the
ratings shown will not result in nuisance tripping or premature motor failNOTES:
ure. Unit warranty will not be affected. See Evaporator-Fan Motor Data
1. Boldface indicates field-supplied drive required. (See Note 3.)
tables on page 20 for additional information.
2.
indicates field-supplied motor and drive required.
6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
representative to verify.
3. Motor drive range is 1020 to 1460 rpm for single-phase standard units,
7. Interpolation is permissible. Do not extrapolate.
1120 to 1585 for 3-phase standard units, and 1300 to 1685 for high-static
units. All other rpms require a field-supplied drive.
4. Values include losses for filters, unit casing, and wet coils. See page 28
for accessory/FIOP static pressure information.
LEGEND
Bhp — Brake Horsepower Input to Fan
FIOP — Factory-Installed Option

27

Table 24 — 48HJ007 Fan Performance — Horizontal Discharge Units With Standard Motor
AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000

0.1
Rpm
Bhp
885
0.63
928
0.73
971
0.84
1015
0.97
1060
1.10
1104
1.25
1138
1.30
1183
1.43
1210
1.58
1254
1.76
1274
1.82
1318
1.95
1362
2.20

0.2
Rpm
Bhp
942
0.73
982
0.83
1022
0.94
1063
1.10
1104
1.20
1130
1.27
1174
1.37
1201
1.50
1243
1.67
1285
1.80
1304
1.85
1345
2.05
1378
2.30

0.4
Rpm
Bhp
1047
0.90
1084
1.02
1121
1.12
1140
1.18
1159
1.23
1196
1.37
1245
1.57
1284
1.65
1312
1.76
1354
1.95
1374
2.12
1412
2.32
1451
2.40

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1139
1.05
1193
1.14
1276
1.30
1160
1.11
1223
1.24
1301
1.38
1188
1.22
1254
1.36
1329
1.44
1196
1.27
1272
1.45
1354
1.58
1229
1.41
1306
1.53
1363
1.70
1264
1.56
1340
1.66
1397
1.86
1305
1.63
1373
1.84
1440
1.95
1338
1.75
1402
1.99
1469
2.04
1366
1.96
1435
2.10
1494
2.19
1536
2.46
1403
2.14
1474
2.21
1514
2.42
1570
2.66
1459
2.25
1496
2.45
1529
2.61
1603
2.87
1534
2.66
1560
2.81
1611
3.01

1.2
Rpm
Bhp
1341
1.40
1374
1.53
1396
1.66
1413
1.75
1434
1.81
1459
1.88
1502
2.06
1524
2.24
1552
2.40
1584
2.61
1624
2.85
1671
3.03
—
—

1.4
Rpm
1413
1437
1460
1475
1487
1520
1552
1585
1616
1646
1677
—
—

Bhp
1.55
1.62
1.68
1.73
1.85
2.07
2.24
2.42
2.63
2.83
2.99
—
—

1.6
Rpm
Bhp
1474
1.58
1490
1.67
1509
1.77
1529
1.92
1554
2.07
1576
2.24
1604
2.42
1638
2.60
1671
2.80
1706
2.97
—
—
—
—
—
—

Table 25 — 48HJ007 Fan Performance — Horizontal Discharge Units With High-Static Motor
AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000

0.2
Rpm Bhp
942 0.73
982 0.83
1022 0.94
1063 1.10
1104 1.20
1130 1.27
1174 1.37
1201 1.50
1246 1.67
1285 1.80
1304 1.85
1345 2.05
1378 2.30

0.4
Rpm Bhp
1047 0.90
1084 1.02
1121 1.12
1140 1.18
1159 1.23
1196 1.37
1245 1.57
1284 1.65
1312 1.76
1354 1.95
1374 2.12
1412 2.32
1451 2.40

0.6
Rpm Bhp
1139 1.05
1160 1.11
1188 1.22
1196 1.27
1229 1.41
1264 1.56
1305 1.63
1338 1.75
1366 1.96
1403 2.14
1459 2.25
1496 2.54
1534 2.66

EXTERNAL STATIC PRESSURE (in. wg)
0.8
1.0
1.2
1.4
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
1193 1.14 1276 1.30 1341 1.40 1413 1.55
1223 1.24 1301 1.38 1374 1.53 1437 1.62
1264 1.36 1329 1.44 1396 1.66 1460 1.68
1272 1.45 1354 1.58 1413 1.75 1475 1.73
1306 1.53 1363 1.70 1434 1.81 1487 1.85
1340 1.66 1397 1.86 1459 1.88 1520 2.07
1373 1.84 1440 1.95 1502 2.06 1552 2.24
1402 1.99 1469 2.04 1524 2.24 1585 2.42
1435 2.10 1494 2.19 1552 2.40 1616 2.63
1474 2.21 1536 2.46 1584 2.61 1646 2.83
1514 2.42 1570 2.66 1624 2.85 1677 2.99
1529 2.61 1603 2.87 1671 3.03 1742 3.43
1560 2.81 1611 3.01 1692 3.49 1764 3.95

1.6
Rpm Bhp
1474 1.58
1490 1.67
1509 1.77
1529 1.92
1554 2.07
1576 2.24
1604 2.42
1638 2.60
1671 2.80
1706 2.97
1739 3.33
—
—
—
—

1.8
Rpm Bhp
1522 1.74
1538 1.84
1558 1.95
1578 2.11
1604 2.28
1627 2.46
1656 2.66
1691 2.86
1726 3.09
1761 3.27
1795 3.67
—
—
—
—

2.0
Rpm Bhp
1566 1.89
1583 2.00
1603 2.12
1624 2.30
1651 2.48
1674 2.68
1704 2.90
1740 3.12
1775 3.35
—
—
—
—
—
—
—
—

LEGEND AND NOTES FOR TABLES 24 AND 25
5. Maximum continuous bhp is 2.4 for standard motors; 2.9 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See EvaporatorNOTES:
Fan Motor Data tables on page 20 for additional information.
1. Boldface indicates field-supplied drive required. (See Note 3.)
6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier
2.
indicates field-supplied motor and drive required.
representative to verify.
7. Interpolation is permissible. Do not extrapolate.
3. Motor drive range is 1120 to 1585 rpm for standard motors; 1300 to
1685 rpm for high-static motors. All other rpms require a field-supplied
drive.
4. Values include losses for filters, unit casing, and wet coils. See below for
accessory/FIOP static pressure information.
LEGEND
Bhp — Brake Horsepower Input to Fan
FIOP — Factory-Installed Option

Table 26 — Economizer Static Pressure Drop
(in. wg)

Table 27 — FIOP MoistureMiser Dehumidification
Package Static Pressure Drop (in. wg)

CFM
900 1200 1400 1600 1800 2000 2200 2400 2600
Durablade .05 .05 .05 .05 .05 .05 .05 .05 .05
EconoMi$er .05 .10 .13 .17 .22 .27 .32 .39 .45

UNIT SIZE
UNIT
48HJ
NOMINAL TONS
3
E/F004
4
D/E/F005
5
D/E/F006
6
D/E/F007
LEGEND
FIOP — Factory-Installed Option

UNIT

28

CFM PER TON
300
400
500
.04
.07
.09
.07
.12
.15
.09
.15
.21
.12
.20
.28

PRE-START-UP

b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain trap is filled with
water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose
parts have been removed.

Failure to observe the following warnings could result in
serious personal injury:
1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant
system.
2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is in
place and secured.
3. Do not remove compressor terminal cover until all
electrical sources are disconnected.
4. Relieve all pressure from system before touching or
disturbing anything inside terminal box if refrigerant
leak is suspected around compressor terminals.
5. Never attempt to repair soldered connection while refrigerant system is under pressure.
6. Do not use torch to remove any component. System
contains oil and refrigerant under pressure. To remove
a component, wear protective goggles and proceed as
follows:
a. Shut off electrical power and then gas to unit.
b. Reclaim refrigerant to relieve all pressure from
system using both high- and low-pressure ports.
c. Cut component connection tubing with tubing
cutter and remove component from unit.
d. Carefully unsweat remaining tubing stubs
when necessary. Oil can ignite when exposed
to torch flame.

START-UP
Unit Preparation — Make sure that unit has been installed in accordance with installation instructions and applicable codes.
Return-Air Filters — Make sure correct filters are installed in unit (see Table 1). Do not operate unit without returnair filters.
Outdoor-Air Inlet Screens — Outdoor-air inlet screen
must be in place before operating unit.
Compressor Mounting — Compressors are internally
spring mounted. Do not loosen or remove compressor holddown bolts.

Internal Wiring — Check all electrical connections in
unit control boxes. Tighten as required.

Refrigerant Service Ports — Each unit system has
3 Schrader-type service ports: one on the suction line, one on
the liquid line, and one on the compressor discharge line. Be
sure that caps on the ports are tight. Two additional Schrader
valves are located under the high-pressure and low-pressure
switches, respectively.
HIGH FLOW REFRIGERANT VALVES — Two high flow
valves are located on the hot gas tube coming out of the compressor and the suction tube going into the compressor. Large
black plastic caps identify these valves. These valves have
O-rings inside which screw the cap onto a brass body to prevent leaks. No field access to these valves is available at this
time. Ensure the plastic caps remain on the valves and are tight
or the possibility of refrigerant leakage could occur.

Proceed as follows to inspect and prepare the unit for initial
start-up:
1. Remove all access panels.
2. Read and follow instructions on all WARNING, CAUTION, and INFORMATION labels attached to, or
shipped with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, or disconnected wires, etc.
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
connections using electronic leak detector, halide
torch, or liquid-soap solution.
c. Inspect all field- and factory-wiring connections.
Be sure that connections are completed and tight.
Be sure that wires are not in contact with refrigerant tubing or sharp edges.
d. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that condenser-fan blade are correctly
positioned in fan orifice. See Condenser-Fan
Adjustment section on page 34 for more details.

Compressor Rotation — On 3-phase units with scroll
compressors, it is important to be certain compressor is rotating
in the proper direction. To determine whether or not compressor is rotating in the proper direction:
1. Connect service gages to suction and discharge pressure
fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge pressure does not rise to normal levels:
1. Note that the evaporator fan (006 and 007 only) is probably also rotating in the wrong direction.
2. Turn off power to the unit, tag disconnect.
3. Reverse any two of the unit power leads.
4. Reenergize to the compressor. Check pressures.
The suction and discharge pressure levels should now move
to their normal start-up levels.

29

NOTE: When the compressor is rotating in the wrong direction, the unit will make an elevated level of noise and will not
provide cooling.

2. Turn on electrical supply and manual gas valve.
3. Set system switch selector at HEAT position and fan
switch at AUTO. or ON position. Set heating temperature
lever above room temperature.
4. The induced-draft motor will start.
5. After a call for heating, the main burners should light
within 5 seconds. If the burner does not light, then there is
a 22-second delay before another 5-second try. If the
burner still does not light, the time delay is repeated. If the
burner does not light within 15 minutes, there is a lockout. To reset the control, break the 24 v power to W1.
6. The evaporator-fan motor will turn on 45 seconds after
burner ignition.
7. The evaporator-fan motor will turn off in 45 seconds after
the thermostat temperature is satisfied.
8. Adjust airflow to obtain a temperature rise within the
range specified on the unit nameplate.
NOTE: The default value for the evaporator-fan motor on/off
delay is 45 seconds. The Integrated Gas Unit Controller (IGC)
modifies this value when abnormal limit switch cycles occur.
Based upon unit operating conditions, the on delay can be
reduced to 0 seconds and the off delay can be extended to
180 seconds. When one flash of the LED (light-emitting diode)
is observed, the evaporator-fan on/off delay has been modified.
If the limit switch trips at the start of the heating cycle during the evaporator on delay, the time period of the on delay for
the next cycle will be 5 seconds less than the time at which the
switch tripped. (Example: If the limit switch trips at 30 seconds, the evaporator-fan on delay for the next cycle will occur
at 25 seconds.) To prevent short-cycling, a 5-second reduction
will only occur if a minimum of 10 minutes has elapsed since
the last call for heating.
The evaporator-fan off delay can also be modified. Once the
call for heating has ended, there is a 10-minute period during
which the modification can occur. If the limit switch trips during this period, the evaporator-fan off delay will increase by
15 seconds. A maximum of 9 trips can occur, extending the
evaporator-fan off delay to 180 seconds.
To restore the original default value, reset the power to the
unit.
TO SHUT OFF UNIT — Set system selector switch at off position. Resetting heating selector lever below room temperature
will temporarily shut unit off until space temperature falls below thermostat setting.

Cooling — Set space thermostat to OFF position. To start
unit, turn on main power supply. Set system selector switch at
COOL position and fan switch at AUTO. position. Adjust thermostat to a setting below room temperature. Compressor starts
on closure of contactor.
Check unit charge. Refer to Refrigerant Charge section on
page 34.
Reset thermostat at a position above room temperature.
Compressor will shut off. Evaporator fan will shut off after a
30-second delay.
TO SHUT OFF UNIT — Set system selector switch at OFF
position. Resetting thermostat at a position above room temperature shuts unit off temporarily until space temperature exceeds thermostat setting. Units are equipped with CycleLOC™ protection device. Unit shuts down on any safety trip,
and indicator light on thermostat comes on. Check reason for
all safety trips.
Compressor restart is accomplished by manual reset at the
thermostat by turning the selector switch to OFF and then to
ON position.
Main Burners — Main burners are factory set and should
require no adjustment.
TO CHECK ignition of main burners and heating controls,
move thermostat set point above room temperature and verify
that the burners light and evaporator fan is energized. Check
heating effect, then lower the thermostat setting below the
room temperature and verify that the burners and evaporator
fan turn off.
Refer to Table 28 for the correct orifice to use at high
altitudes.
Table 28 — Altitude Compensation*

ELEVATION
(ft)

0-2,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000

72,000 AND 115,000
BTUH NOMINAL
INPUT
Natural
Liquid
Gas
Propane
Orifice
Orifice
Size†
Size†
33
43
34
43
35
44
36
44
36
44
37
45
37
45
38
46
39
47
41
48
43
48
44
49
44
49
45
50

150,000 BTUH
NOMINAL INPUT
Natural
Gas
Orifice
Size†
30
30
31
32
33
34
35
36
37
38
39
40
41
42

Liquid
Propane
Orifice
Size†
38
39
40
41
42
43
43
44
44
45
45
46
47
47

Safety Relief — A soft-solder joint at the suction service
Schrader port provides pressure relief under abnormal temperature and pressure conditions.

Ventilation (Continuous Fan) — Set fan and system
selector switches at ON and OFF positions, respectively.
Evaporator fan operates continuously to provide constant air
circulation. When the evaporator-fan selector switch is turned
to the OFF position, there is a 30-second delay before the fan
turns off.

Operating Sequence
COOLING, UNITS WITHOUT ECONOMIZER — When
thermostat calls for cooling, terminals G and Y1 and the compressor contactor (C) are energized. The indoor (evaporator) fan
motor (IFM), compressor, and outdoor (condenser) fan motor
(OFM) start. The OFM runs continuously while the unit is in
cooling. When the thermostat is satisfied, C is deenergized and
the compressor and OFM shut off. After a 30-second delay, the
(IFM) shuts off. If the thermostat fan selector switch is in the
ON position, the evaporator motor will run continuously.

*As the height above sea level increases, there is less oxygen per
cubic foot of air. Therefore, heat input rate should be reduced at
higher altitudes.
†Orifices available through your local Carrier distributor.

Heating
1. Purge gas supply line of air by opening union ahead of
the gas valve. If gas odor is detected, tighten union and
wait 5 minutes before proceeding.

30

HEATING, UNITS WITHOUT ECONOMIZER — When
the thermostat calls for heating, terminal W1 is energized. The
induced-draft motor is energized and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a flame is ignited. When additional
heat is needed, W2 is energized and the high-fire solenoid on
the main gas valve (MGV) is energized. When the thermostat
is satisfied and W1 is deenergized, the IFM stops after a
45-second time-off delay.
COOLING, UNITS WITH DURABLADE ECONOMIZER — When the outdoor-air temperature is above the outdoor-air thermostat (OAT) setting and the room thermostat
calls for cooling, compressor contactor is energized to start
compressor and the outdoor (condenser) fan motor (OFM).
The indoor (evaporator) fan motor (IFM) is energized and the
economizer damper moves to the minimum position. After the
thermostat is satisfied, there is a 30-second delay before the
evaporator fan turns off. The damper then moves to the fullyclosed position. When using continuous fan, the damper moves
to the minimum position.
When the outdoor-air temperature is below the OAT setting
and the thermostat calls for cooling, the economizer damper
move to the minimum position. If the supply-air temperature is
above 57 F, the damper continues to open until it reaches the
fully-open position or until the supply-air temperature drops
below 52 F.
When the supply-air temperature falls between 57 F and
52 F, the damper will remain at an intermediate open position.
If the supply-air temperature falls below 52 F, the damper will
modulate closed until it reaches the minimum position or until
the supply-air temperature is above 52 F. When the thermostat
is satisfied, the damper moves to the fully closed position when
using AUTO. fan or to the minimum position when using continuous fan.
If the outdoor air alone cannot satisfy the cooling requirements of the conditioned space, economizer cooling is integrated with mechanical cooling, providing two stages of cooling.
Compressor and the condenser fan will be energized and the
position of the economizer damper will be determined by the
supply-air temperature. When the second stage of cooling is
satisfied, the compressor and OFM will be deenergized. The
damper position will be determined by the supply-air temperature. When the first stage of cooling is satisfied, there is a
30-second delay before the evaporator fan shuts off. The damper then moves to the fully closed position. When using a continuous fan, the damper moves to the minimum position.
COOLING, UNITS WITH ECONOMI$ER — When the
Outdoor Air Temperature (OAT) is above the ECON SP set
point and the room thermostat calls for Stage 1 cooling (R to
G +Y1), the indoor-fan motor (IFM) is energized and the
EconoMi$er damper modulates to minimum position. The
compressor contactor is energized starting the compressor and
outdoor-fan motor (OFM). After the thermostat is satisfied, the
damper modulates to the fully closed position when the IFM is
deenergized.
When the OAT is below the ECON SP set point and the
room thermostat calls for Stage 1 cooling (R to G + Y1), the
EconoMi$er modulates to the minimum position when the
IFM is energized. The EconoMi$er provides Stage 1 of cooling
by modulating the return and outdoor air dampers to maintain a
55 F supply air set point. If the supply-air temperature (SAT) is
greater than 57 F, the EconoMi$er modulates open, allowing a
greater amount of outdoor air to enter the unit. If the SAT drops
below 53 F, the outdoor-air damper modules closed to reduce
the amount of outdoor air. When the SAT is between 53 and
57 F, the EconoMi$er maintains its position.
HEATING, UNITS WITH ECONOMIZER — When the thermostat calls for heating, terminal W1 is energized. The

induced-draft motor is energized and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a flame is ignited and the damper
moves to the minimum position. When additional heat is needed, W2 energized and the high-fire solenoid on the main gas
valve (MGV) is energized. When the thermostat is satisfied
and W1 is deenergized, the IFM stops after a 45-second timeoff delay. The economizer damper then moves to the fully
closed position. When using continuous fan, the damper will
remain in the minimum position.
UNITS WITH MOISTUREMISER DEHUMIDIFICATION
PACKAGE — When thermostat calls for cooling, terminals G
and Y1 and the compressor contactor C1 is energized. The indoor (evaporator) fan motor (IFM), compressor, and outdoor
(condenser) fan motor (OFM) start. The OFM runs continuously while the unit is in cooling. As shipped from the factory,
MoistureMiser dehumidification circuit is always energized. If
MoistureMiser circuit modulation is desired, a field-installed,
wall-mounted humidistat is required.
If the MoistureMiser humidistat is installed and calls for the
MoistureMiser subcooler coil to operate, the humidistat internal switch closes. This energizes and closes the liquid line solenoid valve coil (LLSV) of the MoistureMiser circuit, forcing
the hot liquid refrigerant of the liquid line to enter the subcooler
coil (see Fig. 39). As the hot liquid passes through the subcooler coil, it is exposed to the cold supply airflow coming off from
the evaporator coil and the liquid is further cooled to a temperature approaching the evaporator coil leaving-air temperature.
The state of the refrigerant leaving the subcooler coil is a highly subcooled liquid refrigerant. The liquid then enters a thermostatic expansion valve (TXV) where the liquid is dropped to a
lower pressure. The TXV does not have a pressure drop great
enough to change the liquid to a 2-phase fluid. The TXV can
throttle the pressure drop of the liquid refrigerant and maintain
proper conditions at the compressor suction valve over a wide
range of operating conditions. The liquid then enters a second
fixed restrictor expansion device for a second pressure drop to
a 2-phase fluid. The liquid proceeds to the evaporator coil at a
temperature lower than normal cooling operation. This lower
temperature is what increases the latent capacity of the rooftop.
The 2-phase refrigerant passes through the evaporator and is
changed into a vapor. The air passing over the evaporator coil
will become colder than during normal operation as a result of
the colder refrigerant temperatures. However, as it passes over
the subcooler coil, the air will be warmed slightly.
As the refrigerant leaves the evaporator, the refrigerant
passes a low-pressure switch in the suction line. This lowpressure switch will de-activate the MoistureMiser package
when the suction pressure reaches 60 psig. The low-pressure
switch is an added safety device to protect against evaporator
coil freeze-up. The low-pressure switch will only de-activate
and open the liquid line solenoid valve in the MoistureMiser
circuit. The compressors will continue to run as long as there is
a call for cooling, regardless of the position of the low-pressure
switch. The solenoid valve and the MoistureMiser package will
be re-activated only when the call for cooling has been satisfied, the low-pressure switch has closed, and a new call for
cooling exists. The crankcase heaters on the scroll compressor
provide additional protection for the compressor due to the additional refrigerant charge in the subcooler.
When the humidistat is satisfied, the humidistat internal
switch opens cutting power to and opening the LLSV. The refrigerant is routed back through the evaporator and the subcooler coil is removed from the refrigerant loop.
When the thermostat is satisfied, C1 is deenergized and the
compressor and OFM shut off. After a 30-second delay, the
IFM shuts off. If the thermostat fan selector switch is in the ON
position, the IFM will run continuously.

31

Fig. 39 — MoistureMiser Option Operation

32

SERVICE

FAN MOTOR BEARINGS — Fan motor bearings are of the
permanently lubricated type. No further lubrication is required.
No lubrication of condenser- or evaporator-fan motors is
required.

When servicing unit, shut off all electrical power to unit to
avoid shock hazard or injury from rotating parts.

Cleaning — Inspect unit interior at the beginning of heating and cooling season and as operating conditions require.
EVAPORATOR COIL
1. Turn unit power off, tag disconnect. Remove evaporator
coil access panel.
2. If economizer or two-position damper is installed, remove economizer by disconnecting Molex plug and removing mounting screws. Refer to accessory economizer
installation instructions or Optional Economizer sections
on pages 12 and 15 for additional information.
3. Slide filters out of unit.
4. Clean coil using a commercial coil cleaner or dishwasher
detergent in a pressurized spray canister. Wash both sides
of coil and flush with clean water. For best results,
back-flush toward return-air section to remove foreign
material. Flush condensate pan after completion.
5. Reinstall economizer and filters.
6. Reconnect wiring.
7. Replace access panels.
CONDENSER COIL — Inspect coil monthly. Clean condenser coil annually, and as required by location and outdoor
air conditions.
One-Row Coil — Wash coil with commercial coil cleaner. It
is not necessary to remove top panel.
2-Row Coils
Clean coil as follows:
1. Turn off unit power, tag disconnecct.
2. Remove top panel screws on condenser end of unit.
3. Remove condenser coil corner post. See Fig. 40. To hold
top panel open, place coil corner post between top panel
and center post. See Fig. 41.
4. Remove screws securing coil to compressor plate and
compressor access panel.
5. Remove fastener holding coil sections together at return
end of condenser coil. Carefully separate the outer coil
section 3 to 4 in. from the inner coil section. See Fig. 42.
6. Use a water hose or other suitable equipment to flush
down between the 2 coil sections to remove dirt and debris. Clean the outer surfaces with a stiff brush in the normal manner.
7. Secure inner and outer coil rows together with a fieldsupplied fastener.
8. Reposition the outer coil section and remove the coil corner post from between the top panel and center post. Reinstall the coil corner post and replace all screws.
CONDENSATE DRAIN — Check and clean each year at
start of cooling season. In winter, keep drain dry or protect
against freeze-up.
FILTERS — Clean or replace at start of each heating and cooling season, or more often if operating conditions require it. Replacement filters must be same dimensions as original filters.
OUTDOOR-AIR INLET SCREENS — Clean screen with
steam or hot water and a mild detergent. Do not use disposable
filters in place of screen.

Fig. 40 — Cleaning Condenser Coil

Fig. 41 — Propping Up Top Panel

Lubrication

Fig. 42 — Separating Coil Sections

COMPRESSORS — Each compressor is charged with correct
amount of oil at the factory.
33

Condenser-Fan Adjustment (Fig. 43) — Shut off
unit power supply. Remove condenser-fan assembly (grille,
motor, motor cover, and fan) and loosen fan hub setscrews.
Adjust fan height as shown in Fig. 43. Tighten setscrews and
replace condenser-fan assembly.

UNIT 48HJ
004-006 and 007 (208/230 V)
007 (460 and 575 V)

Dehumidification package, fully evacuate, recover, and recharge the system to the nameplate specified charge level.
To check or adjust refrigerant charge on systems using the
MoistureMiser Dehumidification package, charge per Fig. 4851. The subcooler MUST be energized to use the charging
charts. The charts reference a liquid pressure (psig) and
temperature at a point between the condenser coil and the
subcooler coil. A tap is provided on the unit to measure liquid
pressure entering the subcooler.
IMPORTANT: The subcooler charging charts (Fig. 4851) are to be used ONLY with units having the optional
MoistureMiser subcooling option. DO NOT use standard
charge (Fig. 44-47) for units with MoistureMiser option,
and DO NOT use Fig. 48-51 for standard units.

FAN HEIGHT — “A” (in.)
2.75
3.50

Fig. 43 — Condenser-Fan Adjustment

Economizer Adjustment — Refer to Optional Economizer sections on pages 12 and 15.

Evaporator Fan Belt Inspection — Check condition
of evaporator belt or tension during heating and cooling inspections or as conditions require. Replace belt or adjust as necessary.
High-Pressure Switch — The high-pressure switch
contains a Schrader core depressor, and is located on the compressor hot gas line. This switch opens at 428 psig and closes at
320 psig. No adjustments are necessary.
Loss-of-Charge Switch — The loss-of-charge switch
contains a Schrader core depressor, and is located on the compressor liquid line. This switch opens at 7 psig and closes at
22 psig. No adjustments are necessary.

Freeze-Stat — The freeze-stat is a bimetal temperaturesensing switch that is located on the “hair-pin” end of the evaporator coil. The switch protects the evaporator coil from freezeup due to lack of airflow. The switch opens at 30 F and closes
at 45 F. No adjustments are necessary.
Refrigerant Charge — Amount of refrigerant charge is
listed on unit nameplate (also refer to Table 1). Refer to Carrier
GTAC2-5 Charging, Recovery, Recycling, and Reclamation
training manual and the following procedures.
Unit panels must be in place when unit is operating during
charging procedure. Unit must operate a minimum of 10 minutes before checking or adjusting referigerant charge.
An accurate superheat, thermocouple- or thermistor-type
thermometer, and a gage manifold are required when using the
superheat charging method for evaluating the unit charge. Do
not use mercury or small dial-type thermometers because they
are not adequate for this type of measurement.
NO CHARGE — Use standard evacuating techniques. After
evacuating system, weigh in the specified amount of refrigerant. (Refer to Table 1.)
LOW CHARGE COOLING — Using Cooling Charging
Charts, Fig. 44-47, vary refrigerant until the conditions of the
charts are met. Note the charging charts are different from type
normally used. Charts are based on charging the units to the
correct superheat for the various operating conditions. Accurate pressure gage and temperature sensing device are required.
Connect the pressure gage to the service port on the suction
line. Mount the temperature sensing device on the suction line
and insulate it so that outdoor ambient temperature does not affect the reading. Indoor-air cfm must be within the normal operating range of the unit.
MOISTUREMISER SYSTEM CHARGING — The system
charge for units with the MoistureMiser option is greater than
that of the standard unit alone. The charge for units with this
option is indicated on the unit nameplate drawing. Also refer
to Fig. 48-51. To charge systems using the MoistureMiser

Fig. 44 — Cooling Charging Chart,
Standard 48HJ004

Fig. 45 — Cooling Charging Chart,
Standard 48HJ005
34

suction temperature should be. If suction temperature is high,
add refrigerant. If suction temperature is low, carefully recover
some of the charge. Recheck the suction pressure as charge is
adjusted.
Example (Fig. 46):
Outdoor Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 F
Suction Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 psig
Suction Temperature should be. . . . . . . . . . . . . . . . . . . . . . .48 F
(Suction temperature may very ± 5 F.)
If a charging device is used, temperature and pressure readings must be accomplished using the charging charts.
TO USE COOLING CHARGING CHARTS, UNITS
WITH MOISTUREMISER DEHUMIDIFICTION PACKAGE — Refer to charts (Fig. 48-51) to determine the proper
leaving condenser pressure and temperature.
Example (Fig. 48):
Leaving Condenser Pressure. . . . . . . . . . . . . . . . . . . . . 250 psig
Leaving Condenser Temperature . . . . . . . . . . . . . . . . . . . 105 F
NOTE: The MoistureMiser subcooler MUST be energized to
use the charging charts.

Flue Gas Passageways — To inspect the flue collector box and upper areas of the heat exchanger:
1. Remove the combustion blower wheel and motor assembly according to directions in Combustion-Air Blower
section below.
2. Remove the 3 screws holding the blower housing to the
flue cover.
3. Remove the flue cover to inspect the heat exchanger.
4. Clean all surfaces as required using a wire brush.

Fig. 46 — Cooling Charging Chart,
Standard 48HJ006

Combustion-Air Blower — Clean periodically to ensure proper airflow and heating efficiency. Inspect blower
wheel every fall and periodically during heating season. For the
first heating season, inspect blower wheel bimonthly to determine proper cleaning frequency.
To inspect blower wheel, remove draft hood and screen.
Shine a flashlight into opening to inspect wheel. If cleaning is
required, remove motor and wheel as follows:
1. Slide burner access panel out.
2. Remove the 5 screws that attach induced-draft motor assembly to the vestibule cover.
3. Slide the motor and blower wheel assembly out of the
blower housing. The blower wheel can be cleaned at this
point. If additional cleaning is required, continue with
Steps 4 and 5.
4. To remove blower from the motor shaft, by remove
2 setscrews.
5. To remove motor, remove the 4 screws that hold the motor to mounting plate. Remove the motor cooling fan by
removing one setscrew. Then remove nuts that hold motor to mounting plate.
6. To reinstall, reverse the procedure outlined above.

Fig. 47 — Cooling Charging Chart,
Standard 48HJ007

Limit Switch — Remove blower access panel (Fig. 5).

TO USE COOLING CHARGING CHART, STANDARD
UNIT — Take the outdoor ambient temperature and read
the suction pressure gage. Refer to charts to determine what

Limit switch is located on the fan deck.

35

CONDENSER FAN MUST BE OPERATING

CONDENSER FAN MUST BE OPERATING

Fig. 48 — Cooling Charging Chart, 48HJ004 with
Optional MoistureMiser Dehumidification Package

Fig. 50 — Cooling Charging Chart, 48HJ006 with
Optional MoistureMiser Dehumidification Package

CONDENSER FAN MUST BE OPERATING

CONDENSER FAN MUST BE OPERATING

Fig. 51 — Cooling Charging Chart, 48HJ007 with
Optional MoistureMiser Dehumidification Package

Fig. 49 — Cooling Charging Chart, 48HJ005 with
Optional MoistureMiser Dehumidification Package

36

Burner Ignition — Unit is equipped with a direct spark

9. Remove the gas valve bracket.
10. Slide the burner tray out of the unit (Fig. 53).
11. To reinstall, reverse the procedure outlined above.

ignition 100% lockout system. Integrated Gas Unit Controller
(IGC) is located in the control box (Fig. 10). A single LED on
the IGC provides a visual display of operational or sequential
problems when the power supply is uninterrupted. The LED
can be observed through the viewport. When a break in power
occurs, the IGC will be reset (resulting in a loss of fault history)
and the evaporator fan on/off times delay will be reset. During
servicing, refer to the label on the control box cover or Table 29
for an explanation of LED error code descriptions.
If lockout occurs, unit may be reset by interrupting power
supply to unit for at least 5 seconds.

ROLLOUT
SWITCH

INDUCEDDRAFT
MOTOR
MOUNTING
PLATE

Table 29 — LED Error Code Description*
LED INDICATION
ON
OFF
1 Flash†
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes

BURNER
SECTION

ERROR CODE DESCRIPTION
Normal Operation
Hardware Failure
Evaporator Fan On/Off Delay Modified
Limit Switch Fault
Flame Sense Fault
4 Consecutive Limit Switch Faults
Ignition Lockout Fault
Induced-Draft Motor Fault
Rollout Switch Fault
Internal Control Fault

FLUE
EXHAUST
VESTIBULE
PLATE

INDUCEDDRAFT
MOTOR

BLOWER
HOUSING

MANIFOLD
PRESSURE
TAP

GAS
VALVE

Fig. 52 — Burner Section Details

LEGEND
LED — Light-Emitting Diode
*A 3-second pause exists between LED error code flashes. If more
than one error code exists, all applicable codes will be displayed in
numerical sequence.
†Indicates a code that is not an error. The unit will continue to operate when this code is displayed.
IMPORTANT: Refer to Troubleshooting Tables 30-36 for additional information.

Main Burners — At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or
other causes. Observe the main burner flames and adjust, if
necessary.
Fig. 53 — Burner Tray Details
CLEANING AND ADJUSTMENT
1. Remove burner rack from unit as described above.
2. Inspect burners and, if dirty, remove burners from rack.
3. Using a soft brush, clean burners and cross-over port as
required.
4. Adjust spark gap. See Fig. 54.
5. Reinstall burners on rack.
6. Reinstall burner rack as described above.

When servicing gas train, do not hit or plug orifice spuds.
REMOVAL AND REPLACEMENT OF GAS TRAIN
(See Fig. 52 and 53)
1. Shut off manual gas valve.
2. Shut off power to unit, tag disconnect.
3. Remove compressor access panel.
4. Slide out burner compartment side panel.
5. Disconnect gas piping at unit gas valve.
6. Remove wires connected to gas valve. Mark each wire.
7. Remove induced-draft motor, ignitor, and sensor wires at
the Integrated Gas Unit Controller (IGC).
8. Remove the 2 screws that attach the burner rack to the
vestibule plate.

Replacement Parts — A complete list of replacement parts may be obtained from any Carrier distributor
upon request. Refer to Fig. 55 for a typical unit wiring
schematic.

37

LOW HEAT
48HJE004, 48HJD005-007 — 72,000 BTUH INPUT

MEDIUM AND HIGH HEAT
48HJE005-007, 48HJF004 — 115,000 BTUH INPUT
48HJF005-007 — 150,000 BTUH INPUT

Fig. 54 — Spark Gap Adjustment

38

TROUBLESHOOTING
Refer to Tables 30-36 for troubleshooting details.
Table 30 — LED Error Code Service Analysis
SYMPTOM
Hardware failure.
(LED OFF)

CAUSE
Loss of power to control module (IGC).

REMEDY
Check 5 amp fuse on IGC, power to unit, 24-v circuit breaker, and
transformer. Units without a 24-v circuit breaker have an internal
overload in the 24-v transformer. If the overload trips, allow
10 minutes for automatic reset.
Ensure unit is fired on rate and temperature rise is correct.

Fan ON/OFF delay modified High limit switch opens during heat
exchanger warm-up period before fan-on
(LED/FLASH)
delay expires.
Limit switch opens within three minutes
Ensure units’ external static pressure is within application guidelines.
after blower-off delay timing in Heating mode.
High temperature limit switch is open.
Check the operation of the indoor (evaporator) fan motor.
Limit switch fault.
Ensure that the supply-air temperature rise is in accordance with
(LED 2 flashes)
the range on the unit nameplate.
The IGC sensed flame that should not be
Reset unit. If problem persists, replace control board.
Flame sense fault.
present.
(LED 3 flashes)
Inadequate airflow to unit.
Check operation of indoor (evaporator) fan motor and that supply-air
4 consecutive limit
temperature rise agrees with range on unit nameplate information.
switch faults.
(LED 4 flashes)
Unit unsuccessfully attempted ignition for
Check ignitor and flame sensor electrode spacing, gaps, etc.
Ignition lockout.
15 minutes.
Ensure that flame sense and ignition wires are properly
(LED 5 flashes)
terminated. Verify that unit is obtaining proper amount of gas.
IGC does not sense that induced-draft
Check for proper voltage. If motor is operating, check the
Induced-draft motor fault.
motor is operating.
speed sensor plug/IGC Terminal J2 connection. Proper
(LED 6 flashes)
connection: PIN 1— White, PIN 2 — Red, PIN 3 — Black.
Rollout switch has opened.
Rollout switch will automatically reset, but IGC will continue to
Rollout switch fault.
lock out unit. Check gas valve operation. Ensure that induced(LED 7 flashes)
draft blower wheel is properly secured to motor shaft.
Reset unit at unit disconnect.
Microprocessor has sensed an error in the
If error code is not cleared by resetting unit power, replace the IGC.
Internal control fault.
software or hardware.
(LED 8 flashes)
IMPORTANT: Refer to heating troubleshooting for additional
heating section troubleshooting information.
If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that may be present before handling
new control board. The IGC is sensitive to static electricity and
may be damaged if the necessary precautions are not taken.

LEGEND
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode

39

Table 31 — Heating Service Analysis
PROBLEM
Burners will not
ignite.

CAUSE
Misaligned spark electrodes.

REMEDY
Check flame ignition and sensor electrode positioning. Adjust as
needed.
Check gas line for air purge as necessary. After purging gas line of
air, allow gas to dissipate for at least 5 minutes before attempting to
relight unit.
Check gas valve.
Drain water and install drip leg to trap water.
Check power supply, fuses, wiring, and circuit breaker.
Check transformer. Transformers with internal overcurrent protection
require a cool-down period before resetting. Check 24-v circuit
breaker; reset if necessary.
Check all wiring and wirenut connections.
Replace thermostat.
Run continuity check. Replace wires, if necessary.
Clean or replace filter as necessary.
Check gas pressure at manifold. Clock gas meter for input. If too low,
increase manifold pressure or replace with correct orifices.
Replace with proper unit or add additional unit.
Clean filter, replace filter, or remove any restrictions.
Use high speed tap, increase fan speed, or install optional blower, as
suitable for individual units, Adjust pulley.
Check rotation of blower, thermostat heat anticipator settings, and
temperature rise of unit. Adjust as needed.
Adjust minimum position.
Check economizer operation.
Check all screws around flue outlets and burner compartment.
Tighten as necessary.
Cracked heat exchanger.
Overfired unit — reduce input, change orifices, or adjust gas line or
manifold pressure.
Check vent for restriction. Clean as necessary.
Check orifice to burner alignment.
Wait until mandatory one minute time period has elapsed or reset
power to unit.

No gas at main burners.

Water in gas line.
No power to furnace.
No 24 v power supply to control circuit.

Inadequate heating.

Miswired or loose connections.
Burned-out heat anticipator in thermostat.
Broken thermostat wires.
Dirty air filter.
Gas input to unit too low.
Unit undersized for application.
Restricted airflow.
Blower speed too low.
Limit switch cycles main burners.
Too much outdoor air.

Poor flame
characteristics.

Incomplete combustion (lack of
combustion air) results in:
Aldehyde odors, CO (carbon monoxide),
sooting flame, or floating flame.

Burners will not
turn off.

Unit is locked into Heating mode for a
one minute minimum.

Table 32 — Durablade Economizer Service Analysis
PROBLEM
Damper does not
open.

CAUSE
Evaporator fan not on.

REMEDY
Check wiring between G on connection board and evaporator-fan
contactor.
1. Check that SW3 is making proper contact with the damper blade.
2. Check continually across R1 coil. If not connect, replace relay R1.
3. Check diode D18. If diode is not functioning properly, replace D18.
4. Check wiring in economizer relay pack. (See unit label diagram.)
If there is 24 vac power at the motor terminals, but motor is not operating, replace motor.
1. Set at correct temperature (3 F below indoor space temperature).
2. Check OAT or EC by setting set point above outdoor temperature or
humidity level. If switch does not close, replace OAT or EC.
1. Check continuity across relay R2 coil. If not connected, replace R2
relay.
2. Check continuity across relay R3 coil. If not connected, replace R3
relay.
If supply-air temperature is over 57 F, switch T2 should be closed. If
not, replace SAT.
1. Check switches 2 and 4. If non-operational, replace.
2. Check diode D19. If diode D19 is not functioning properly, replace.
3. Check wiring on economizer and on economizer relay pack. (See
unit label diagram.)
If supply-air thermostat is below 52 F, switch T1 should be closed. If
not, replace SAT.
If there is 24 vac power at motor terminals, but motor is not operating,
replace the motor.

No power to economizer motor.

Economizer motor failure.
Economizer
operation limited to
minimum position.

OAT or EC set too high.
Check wiring of economizer relay packs.

Check SAT.
Damper does not
close.

Incorrect wiring or wiring defects.

Check SAT.
Economizer motor failure.

EC
OAT
SAT
SW

—
—
—
—

LEGEND
Enthalpy Control
Outdoor-Air Thermostat
Supply-Air Thermostat
Switch

40

FLASH CODE
Constant On
Constant Off
Continuous
Flash
Flash One
Flash Two
Flash Three

Non-Critical Fault

Critical Fault

Table 33 — EconoMi$er Flash Code Identification
CAUSE
Normal operation
No power
CONFIG button pushed and held
between 3 and 9 seconds
Control board fault
Thermostat fault (i.e., Y2 without Y1)
Actuator fault

Flash Eight

Return air humidity sensor fault

Flash Nine

Carbon Dioxide (CO2) sensor fault

ACTION TAKEN BY ECONOMI$ER
Normal operation.
No operation.
Outdoor air damper is stroked fully open, then closed
(automatic test procedure takes 3 minutes to complete).
System shutdown.
System shutdown until corrected.
Revert to mechanical cooling only.
Continue operation with damper at minimum position.
Revert to mechanical cooling only.
Continue operation with damper at minimum position.
Disable mechanical cooling lockout.
Continue operation with dry bulb or dry bulb differential switchover.
Continue operation with single enthalpy EconoMi$er
switchover or dry bulb EconoMi$er switchover (without
humidity sensor).
Continue operation with single enthalpy, differential dry
bulb, or dry bulb EconoMi$er switchover.
Continue operation without ventilation control.

Flash Ten

Onboard adjustment potentiometer fault

Continue operation with default potentiometer settings.

Flash Four

Supply air temperature sensor fault

Flash Five

Outdoor air temperature sensor fault

Flash Six

Outdoor air humidity sensor fault

Flash Seven

Return air temperature sensor fault

Table 34 — EconoMi$er Troubleshooting
PROBLEM
Damper Does Not
Open

POTENTIAL CAUSE
Indoor (Evaporator) Fan is
Off

No Power to EconoMi$er
Controller
No Power to G Terminal
Controller Fault
Thermostat Fault

Actuator Fault

EconoMi$er
Operation Limited to
Minimum Position

Damper Position
Less than Minimum
Position Set Point
Damper Does Not
Return to Minimum
Position
Damper Does Not
Close on Power Loss
IFM
PL

Minimum Position Set
Incorrectly
EconoMi$er Changeover
Set Point Set Too High or
Too Low
Supply Air Temperature
Sensor Faulty
Outdoor Air Temperature
Sensor Faulty
Supply Air Low Limit
Strategy Controlling
CO2 Ventilation Strategy
Controlling
Damper Travel is
Restricted

REMEDY
Check to ensure that 24 vac is present at Terminal C1 (Common Power)
on the IFC (Indoor Evaporator Fan Contactor) or that 24 vac is present at
the IFO (Indoor Evaporator Fan On) terminal. Check whether 24 vac is
present at PL 6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is
not present, check wiring (see unit label diagram).
Check proper thermostat connection to G on the connection board.
Check to ensure that 24 vac is present across Terminals 24 VAC and
24 V COM on the EconoMi$er control. If 24 vac is not present, check wiring
(see unit label diagram). If 24 vac is present, STATUS light should be on
constantly.
If IFM is on, check to ensure 24 vac is present on G Terminal of the
EconoMi$er controller. If 24 vac is not present, check wiring (see unit
label diagram).
If STATUS light is flashing one flash, the EconoMi$er controller is
experiencing a fault condition. Cycle power to the controller. If condition
continues, replace the EconoMi$er controller.
If STATUS light is flashing two flashes, the EconoMi$er controller senses
the thermostat is wired incorrectly. Check wiring between the thermostat
and the connection board in the electrical panel. The fault condition is
caused by Y2 being energized before Y1.
Check the wiring between the EconoMi$er controller and the actuator.
Hold CONFIG button between 3 and 10 seconds to verify the
actuator’s operation. (This process takes 3 minutes to complete.)
Verify that the MIN POS (%) is set greater than zero. Adjust MIN POS (%)
to 100% to verify operation, and then set to correct setting.
Set at correct value. See Table 3.
If STATUS light is flashing 4 flashes, Supply Air Temperature Sensor is
faulty. Check wiring or replace sensor.
If STATUS light is flashing 5 flashes, Outdoor Air Temperature Sensor is
faulty. Check wiring or replace sensor.
The supply-air temperature is less than 45 F, causing the minimum
position to be decreased. Refer to the Start-Up instructions. Verify correct
setting of MIN POS (%). If correct, EconoMi$er is operating correctly.
If a CO2 sensor is being used, and the damper position is greater than
minimum position, the ventilation control strategy is controlling. Refer to
the Start-Up instructions. EconoMi$er is operating correctly.
Check to ensure the damper is not blocked.

LEGEND
— Indoor Fan Motor
— Plug

41

Table 35 — MoistureMiser Dehumidification Subcooler Service Analysis
PROBLEM
Subcooler will not energize.

CAUSE
No power to control transformer from
evaporator-fan motor.
No power from control transformer to liquid line
solenoid valve

Liquid line solenoid valve will not operate.
Subcooler will not deenergize.
Low system capacity.

Liquid line solenoid valve will not open.
Low refrigerant charge or frosted evaporator
coil.

Loss of compressor superheat
conditions with subcooler
energized.

Thermostatic expansion valve (TXV).

42

REMEDY
Check power source and evaporator-fan relay. Ensure
all wire connections are tight.
1. Fuse open; check fuse. Ensure continuity of wiring.
2. Low-pressure switch open. Cycle unit off and allow
low-pressure switch to reset. Replace switch if it will
not close.
3. Transformer bad; check transformer.
1. Solenoid coil defective; replace.
2. Solenoid valve stuck open; replace.
Valve is stuck closed; replace valve.
1. Check charge amount. Charge per Fig. 47-51.
2. Evaporator coil frosted; check and replace lowpressure switch if necessary.
1. Check TXV bulb mounting, and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.

Table 36 — Cooling Service Analysis
PROBLEM
Compressor and condenser fan
will not start.

Compressor will not start
but condenser fan runs.

Compressor cycles (other than
normally satisfying thermostat).

Compressor operates continuously.

Excessive head pressure.

Head pressure too low.

Excessive suction pressure.

Suction pressure too low.

Evaporator fan will not shut off.

CAUSE
Power failure.
Fuse blown or circuit breaker tripped.
Defective thermostat, contactor, transformer,
or control relay.
Insufficient line voltage.
Incorrect or faulty wiring.
Thermostat setting too high.
Faulty wiring or loose connections in compressor circuit.
Compressor motor burned out, seized, or
internal overload open.
Defective run/start capacitor, overload, start
relay.
One leg of 3-phase power dead.
Refrigerant overcharge or undercharge.
Defective compressor.
Insufficient line voltage.
Blocked condenser.
Defective run/start capacitor, overload, or
start relay.
Defective thermostat.
Faulty condenser-fan motor or capacitor.
Restriction in refrigerant system.
Dirty air filter.
Unit undersized for load.
Thermostat set too low.
Low refrigerant charge.
Leaking valves in compressor.
Air in system.
Condenser coil dirty or restricted.
Dirty air filter.
Dirty condenser coil.
Refrigerant overcharged.
Air in system.
Condenser air restricted or air short-cycling.
Low refrigerant charge.
Compressor valves leaking.
Restriction in liquid tube.
High heat load.
Compressor valves leaking.
Refrigerant overcharged.
Dirty air filter.
Low refrigerant charge.
Metering device or low side restricted.
Insufficient evaporator airflow.
Temperature too low in conditioned area.
Outdoor ambient below 25 F.
Time off delay not finished.

43

REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Lower thermostat setting below room temperature.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Replace fuse or reset circuit breaker. Determine
cause.
Recover refrigerant, evacuate system, and
recharge to nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace thermostat.
Replace.
Locate restriction and remove.
Replace filter.
Decrease load or increase unit size.
Reset thermostat.
Locate leak, repair, and recharge.
Replace compressor.
Recover refrigerant, evacuate system, and
recharge.
Clean coil or remove restriction.
Replace filter.
Clean coil.
Recover excess refrigerant.
Recover refrigerant, evacuate system, and
recharge.
Determine cause and correct.
Check for leaks, repair, and recharge.
Replace compressor.
Remove restriction.
Check for source and eliminate.
Replace compressor.
Recover excess refrigerant.
Replace filter.
Check for leaks, repair, and recharge.
Remove source of restriction.
Increase air quantity. Check filter and replace if
necessary.
Reset thermostat.
Install low-ambient kit.
Wait for 30-second off delay.

44
Fig. 55 — Typical Wiring Schematic and Component Arrangement
(208/230 3-Phase Unit Shown)

LEGEND AND NOTES FOR FIG. 55
AHA —
C
—
CAP —
CC
—
CLO —
COMP —
D
—
EC
—
ECON —
EPS —
EQUIP —
ER
—
FPT
—
FSS —
FU
—
GND —
GVR —
HPS —
HS
—
HV
—
I
—
IDM
—
IFC
—
IFM
—
IGC
—
LED —
LPS —
LS
—
MGV —
MTR —
OAT —
OFM —
P
—

PL
QT
R
RS
SAT
SEN
SW1
SW2
SW3
SW4
TC
TH
TRAN

Adjustable Heat Anticipator
Contactor, Compressor
Capacitor
Cooling Compensator
Compressor Lockout
Compressor Motor
Diode
Enthalpy Control
Economizer
Emergency Power Supply
Equipment
Economizer Relay
Freeze-Protection Thermostat
Filter-Status Switch
Fuse
Ground
Gas Valve Relay
High-Pressure Switch
Hall-Effect Sensor
High Voltage
Ignitor
Induced-Draft Motor
Indoor (Evaporator) Fan Contactor
Indoor (Evaporator) Fan Motor
Integrated Gas Unit Controller
Light-Emitting Diode
Low-Pressure/Loss-of-Charge Switch
Limit Switch
Main Gas Valve
Motor
Outdoor-Air Thermostat
Outdoor (Condenser) Fan Motor
Plug

—
—
—
—
—
—
—
—
—
—
—
—
—

Plug Assembly
Quadruple Terminal
Relay
Rollout Switch
Supply-Air Thermostat
Sensor
Switch Fully Open
Switch Fully Closed
Switch Minimum Vent Position
Switch Maximum Vent Position
Thermostat-Cooling
Thermostat-Heating
Transformer
Field Splice
Marked Wire
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only.
Not to represent wiring.

NOTES FOR FIG. 55
1. If any of the original wire furnished must be replaced, it must be replaced with Type 90 C wire or its
equivalent.
2. Three-phase motors are protected under primary single-phasing conditions.
3. Thermostats: HH07AT170, 172
Subbase: HH93AZ176, 177, 178 and 179
4. Set heat anticipator at .14 amp for first stage and .14 amp for second stage.
5. Use copper conductors only.
6. TRAN is wired for 230 v unit. If unit is to be run with 208 v power supply, disconnect BLK wire from
230 v tap and connect to 208 v tap (RED). Insulate end of 230 v tap.

45

Copyright 2000 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-767
Printed in U.S.A.
Form 48HJ-18SI
Pg 46
9-00
Replaces: 48HJ-17SI
Book 1 4
Tab 1a 6a

I. PRELIMINARY INFORMATION
MODEL NO.:________________________________

SERIAL NO.: ________________________________________

DATE:______________________________________

TECHNICIAN: _______________________________________
BUILDING LOCATION: _______________________________

II. PRE-START-UP (insert checkmark in box as each item is completed)


 VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

 REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS

 VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS

 CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

 CHECK GAS PIPING FOR LEAKS

 CHECK THAT RETURN INDOOR-AIR FILTER IS CLEAN AND IN PLACE

 VERIFY THAT UNIT INSTALLATION IS LEVEL

 CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

III. START-UP
ELECTRICAL
SUPPLY VOLTAGE
COMPRESSOR AMPS
INDOOR-FAN AMPS

L1-L2
L1
L1

L2-L3
L2
L2

L3-L1
L3
L3

TEMPERATURES
OUTDOOR-AIR TEMPERATURE
RETURN-AIR TEMPERATURE
COOLING SUPPLY AIR
GAS HEAT SUPPLY AIR

DB
DB

WB

PRESSURES
GAS INLET PRESSURE
GAS MANIFOLD PRESSURE
REFRIGERANT SUCTION
REFRIGERANT DISCHARGE

IN. WG
IN. WG (HI FIRE)
PSIG
°F
PSIG
°F


 VERIFY REFRIGERANT CHARGE USING CHARGING TABLES

 VERIFY THAT 3-PHASE SCROLL COMPRESSOR ROTATING IN CORRECT DIRECTION

Copyright 2000 Carrier Corporation
Book
Tab

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
1 4
PC 111
Catalog No. 534-767
Printed in U.S.A.
Form 48HJ-18SI
Pg CL-1
9-00
Replaces: 48HJ-17SI
1a 6a

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE

START-UP CHECKLIST
(Remove and Store in Job File)



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