Carrier 50JZ 024-060, 48JZ-N-024-060, 50GL 024-060, 48GP-N-024-060 User Manual

48GP (N) 024-060, 48JZ (N) 024-060

50GL 024-060, 50JZ 024-060

ICM FIOP Installation Instructions

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Installation, Start-Up, and Operating Instructions

NOTE: Read the entire instruction manual before starting the

installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS .....................................................1

INTRODUCTION ..........................................................................2

RECEIVING AND INSTALLATION ..........................................2

ICM FIOP PRE-START-UP..........................................................2

Electrical Connections ..............................................................2

Control Voltage Connections ..............................................2

Standard Connection............................................................2

Easy Select™—48GP..........................................................2

48GP Sequence of Operation..............................................4

Easy Select™—48JZ...........................................................5

48JZ Sequence of Operation...............................................7

Easy Select™—50GL & 50JZ............................................7

50GL & 50JZ Sequence Of Operation...............................9

ICM FIOP START-UP ................................................................10

48GP Start-Up (ICM FIOP) ...................................................10

48JZ Start-Up (ICM FIOP) ....................................................10

50GL: Start-Up (ICM FIOP)..................................................11

50JZ: Start-Up (ICM FIOP) ...................................................11

ELECTRICAL DATA & SCHEMATICS—ICM FIOP.............12

Physical Data & Electrical Schematics..................................12

Tables For System Set-Up......................................................12

CARE AND MAINTENANCE...................................................12

TROUBLESHOOTING ...............................................................13

START-UP CHECKLIST............................................................13

NOTE TO INSTALLER — READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY before installing this unit.
Also, make sure the Owner’s Manual and Service Instructions are
left with the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of
cleaning coils and 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 extinguisher
available for all brazing operations.

Recognize safety information. This is the safety-alert symbol .
When you see this symbol on the product or in instructions or
manuals, be alert to the potential for personal injury.

Understand the signal words — DANGER, WARNING, CAU­TION, and NOTE. Danger identifies the most serious hazards,
which will result in severe personal injury or death. Warning
indicates a condition that could cause serious personal injury or
death. Caution is used to identify unsafe practices, which would
result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.

The power supply (volts, phase, and hertz) must correspond to that
specified on unit rating plate.

The electrical supply provided by the utility must be sufficient to
handle load imposed by this unit. Electrical supply must match the
voltage requirements listed on unit rating plate.

This installation must conform with local building codes and with
NEC (National Electrical Code). Refer to provincial and local
plumbing or waste water codes and other applicable local codes.

Fig. 1—Puron® Unit (48GP Shown)

Improper installation, adjustment, alteration, service, mainte­nance, or use can cause explosion, fire, electric shock, or
other occurrences, which could cause serious injury or death
or damage your property. Consult a qualified installer or
service agency for information or assistance. The qualified
installer or agency must use only factory-authorized kits or
accessories when modifying this product.

C99088

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4
Tab 1a 1a

PC 101 Catalog No. 534-80085 Printed in U.S.A. Form 48–21SI Pg 1 10-01 Replaces: 48–20SI

Approved for outdoor installation on wood flooring or on class A,
B or C roof covering materials.

Before performing service or maintenance operations on
system, turn off main power to unit and install lock-out tag.
Turn off accessory heater power switch if applicable. Elec­trical shock could cause severe injury or death.

Puron® (R-410A) systems operate at higher pressures than
standard R-22 systems. Do not use R-22 service equipment or
components on Puron® (R-410A) equipment. Ensure service
equipment is rated for Puron® (R-410A)

INTRODUCTION

NOTE: The minimum outdoor cooling operating temperature for

units using this ICM motor option is 55°F. To operate in cooling
at lower ambients the Motor Master™ II low ambient kit is
required.

These instructions cover the installation of a Carrier Small
Packaged Product with ICM motor-factory installed option
(FIOP). This option can be selected as a FIOP on gas
heating/electric cooling (48GP), dual fuel–electric heat pump with
gas heat back-up (48JZ), electric cooling (50GL) or electric heat
pump (50JZ) units with Puron®.

RECEIVING AND INSTALLATION

Refer to unit Installation Instructions.

ICM FIOP PRE-START-UP

Step 1—Electrical Connections

CONTROL VOLTAGE CONNECTIONS

NOTE: Do not use any type of power-stealing thermostat, with­out connecting the C (Common) terminal. Failure to follow this
note could result in unit control problems.

Use no. 18 American Wire Gage (AWG) color-coded, insulated
(35 C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 ft from the unit (as measured along the control
voltage wires), use no. 16 AWG color-coded, insulated (35 C
minimum) wires.

STANDARD CONNECTION

Remove knockout hole located in the heat section panel adjacent to
the service access panel (See unit installation package). Remove
the rubber grommet from the installer’s packet (included with unit)
and install grommet in the knockout opening. Provide a drip loop
before running wire through panel. Run the low-voltage leads from
the thermostat, through the inlet hole, and into unit low-voltage
splice box. Locate 18-gage wires leaving control box. These
low-voltage connection leads can be identified by colors (See Fig.
2, 3, 4 or 5). Ensure the leads are long enough to be routed into the
low-voltage splice box (located below right side of control box).
Route leads through hole in bottom of control box and make
low-voltage connections (See Fig. 2, 3, 4 or 5). Secure all cut
wires, so that they do not interfere with operation of unit.

SPECIAL PROCEDURES FOR 208–V OPERATION

Make sure that the power supply to the unit is switched OFF
before making any wiring changes. With disconnect switch
open, move yellow wire from transformer (3/16 in.) terminal
marked 230 to terminal marked 200. This retaps transformer
to primary voltage of 208-v. Electrical shock could cause
serious injury or death.

EASY SELECT™—48GP

HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)

FIELD-SUPPLIED
FUSED DISCONNECT

BLK(DH)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

WHI(W1)

DHUM

Y

G

R

C

W1

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)

GND

SPLICE BOX

LEGEND

Field Control-Voltage Wiring
Field High-Voltage Wiring

Fig. 2—48GP High- and Control-Voltage

Connections

HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)

FIELD CONTROL - VOLTAGE WIRING
FIELD HIGH - VOLTAGE WIRING

GND

SPLICE BOX

FIELD-SUPPLIED
FUSED DISCONNECT

BLK (DH)

WHT(W1)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

ORN(O)

DHUM

W/W1

Y/Y2

G

R

C

O/W2

POWER
SUPPLY

THERMOSTAT

(THERMIDISTAT ™ )

Fig. 3—48JZ High- and Control-Voltage

Connections

POWER
SUPPLY

THERMOSTAT
(TYPICAL)

C01026

C01107

EASY SELECT™ CONFIGURATION TAPS FOR 48GP

Easy Select™ taps are used by the installer to configure a system.

2

HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)

Field Control-Voltage Wiring
Field High-Voltage Wiring

SPLICE BOX

LEGEND

GND

FIELD-SUPPLIED
FUSED DISCONNECT

BLK(DH)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

WHI(W1)

GRA(W2)

DHUM

Y

G

R

C

W1

W2

POWER
SUPPLY

THERMOSTAT
(TYPICAL)

C01027

Fig. 4—50GL High- and Control-Voltage

Connections

HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)

Field Control-Voltage Wiring
Field High-Voltage Wiring

SPLICE BOX

LEGEND

GND

FIELD-SUPPLIED
FUSED DISCONNECT

BLK(DH)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

WHI(W1)

GRA(W2)

ORN(0)

DHUM

Y

G

R

C

W1

W2

O

POWER
SUPPLY

THERMOSTAT
(TYPICAL)

C01028

Fig. 5—50JZ High- and Control-Voltage

Connections

The ICM motor uses the selected taps to modify its operation to a
pre-programmed table of airflows.
The unit must be configured to operate properly with system
components with which it is installed. To successfully configure a
basic system (see information printed on circuit board label located
next to select pins), move the 6 select wires to the pins which
match the components used (See Fig. 8).

a. GAS HEAT/CFM—SELECT GAS HEAT INPUT SIZE

Factory selected gas heat size should correspond to unit label.

b. AC/HP SIZE—SELECT SYSTEM SIZE INSTALLED

Factory selected air conditioner size should correspond to
capacity of unit installed. Installer should verify air conditioner
size to ensure that airflow delivered falls within proper range
for the size unit installed. This applies to all operational modes.

c. SYSTEM TYPE—SELECT SYSTEM TYPE INSTALLED

Factory selected on 48GP for AC-Air conditioner.

For Gas Heat/Electric Cool Unit–AC must be selected.

d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW, OR

HIGH AIRFLOW

The AC/HP CFM Adjust select is factory set to the High-HI
(NOM for 060) tap. The CFM Adjust selections NOM/LO will
regulate airflow supplied for all operational modes, except
non-heat pump heating modes. HI provides 15 percent airflow
over nominal unit size selected and LO provides 10 percent
airflow below nominal unit size selected. Adjust selection
options are provided to adjust airflow supplied to meet indi­vidual installation needs for such things as noise, comfort, and
humidity removal (See Fig. 8, D as indicated).

e. ON/OFF DELAY—SELECT DESIRED

TIME DELAY PROFILE

Four motor operation delay profiles are provided to customize
and enhance system operation (See Fig. 8, E as indicated).
Selection options are:

(1.) The standard 90 sec off delay (Factory Setting) at 100

percent airflow in cooling mode. In heating mode, IGC
will control 45 sec on delay with no airflow and 45 sec off
delay.

(2.) A 30 sec cooling delay with no airflow/ 90 sec off delay at

100 percent airflow profile is used when it is desirable to
allow system coils time to cool-down in conjunction with
the airflow in heating mode.

(3.) A no delay option used for servicing unit or when a

thermostat is utilized to perform delay functions in cooling
mode. In heating mode IGC will control 45 sec on delay
with no airflow and 45 sec off delay.

(4.) Not recommended for 48GP

f. CONTINUOUS FAN—SELECT DESIRED FAN SPEED

WHEN THERMOSTAT IS SET ON CONTINUOUS FAN

(1.) LO speed—Factory setting, 50 percent cooling mode

airflow.

(2.) MED speed—Move connector to MED, 65 percent cooling

mode airflow.

(3.) HI speed—Move connector to HI, 100 percent cooling

mode airflow (See Fig. 8, F as indicated).

g. LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE

The low-voltage circuit is fused by a board-mounted 5–amp
automotive fuse placed in series with the transformer SEC2 and
the R circuit. The C circuit of the transformer is referenced to
chassis ground through a printed circuit run at SEC1 connected
to metal standoff marked with ground symbol.

h. BASIC UNIT CONFIGURATION

The following basic configuration of the indoor motor will
provide ARI rated performance of the 48GP. This BASIC

CONFIGURATION should be used when the rated ARI perfor­mance is required, or if system enhancements such as super
dehumidify are not needed.

(1.) HEAT-Factory selected to match heat input size.

3

(2.) AC/HP Size-Factory selected to match system size, please

verify.

(3.) SYSTEM TYPE-Factory selected on 48GP system AC-

AIR CONDITIONER.

(4.) AC/HP CFM ADJUST-Select HIGH for 042 & 048, NOM

for 036 & 060, and LO for 024 & 030..

(5.) ON/OFF DELAY-Factory selected 0/90 profile.

(6.) CONTINUOUS FAN-Select desired fan speed when ther-

mostat is set to continuous fan.

i. COMFORT OPTIONS—SUPER DEHUMIDIFY (See Quick

Reference Guide)

The Super Dehumidify option is possible when this unit is
installed with a field supplied Thermidistat™ control (Super­Dehumidify does not require an outdoor temperature sensor).
The following configuration is recommended for maximum
cooling/dehumidifying comfort. This configuration will im­prove the comfort provided by the air conditioning system if
more humidity removal is desired. While providing this im­proved comfort, the system will operate efficiently, but not at
the published ARI SEER efficiency. During cool-to-dehumidify
call, it provides maximum dehumidification by reducing airflow
to a minimum. The actual super dehumidify command from
Thermidistat™ control to the indoor unit is a “Y” signal without
a “G” signal in addition to dehumidify signal. The indoor unit
responds to this combination by reducing the airflow to a
minimum. All other characteristics of cool to dehumidify are the
same.
The following system configuration is recommended for maxi­mum cooling/dehumidifying comfort (See Fig. 8).

(1.) HEAT-Factory selected to match gas heat size of unit

installed.

(2.) AC/HP Size-Factory selected to match system size, please

verify.

(3.) SYSTEM TYPE-Factory selected on 48GP system AC-

AIR CONDITIONER.

(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060).

(5.) ON/OFF DELAY-Select ENH profile.

(6.) CONTINUOUS FAN-Select desired fan speed when ther-

mostat is set to continuous fan.

(7.) DEHUMIDIFY MODE-Remove J1 jumper to activate.

NOTE: J1 jumper should only be removed when a Thermidis­tat™, humidistat or capable zoning control is installed.

(8.) LOW VOLTAGE CONNECTIONS-Make connections as

shown in ELECTRICAL CONNECTIONS section.

(9.) CONFIGURE THERMIDISTAT™-Follow Thermidis-

tat™ (or capable zoning system) installation instructions
for Super Dehumidify operation.

ACCESSORY INSTALLATION

a. AUXILIARY TERMINALS

The AUX and HUM terminals on the Easy Select™ Board are
tied directly to the G terminal, and provide a 24-v. signal
whenever the G terminal is energized (See Fig. 6). During
Super dehumidify mode, the G signal is not present and the
auxiliary terminals are not energized. If the installation includes
the use of this operating mode, do not use these terminals to
control accessories. See Electronic Air Cleaner and Humidifier
sections for further information.

b. ELECTRONIC AIR CLEANER CONNECTIONS

The AUX1 and AUX2 terminals are not always energized
during blower operations, as described above. When using an

electronic air cleaner with the unit, use Airflow Sensor P/N.
KEAAC0101AAA. The airflow sensor turns on electronic air
cleaner when the blower is operating.

c. HUMIDIFIER/HUMIDISTAT CONNECTIONS

Easy Select™ Board terminals HUM1 and HUM2 are provided
for direct connection to the low-voltage control of a humidifier
through a standard humidistat (See Fig. 6). These terminals are
energized with 24-v. when G thermostat signal is present (See
Fig. 6 & 7). Alternately, the 24-v. signal may be sourced from
the W and C on the 9 pin connector. When using a Thermidis­tat™ Control, Zone Comfort Plus or Comfort Zone II, the 24-v.
signal may be sourced directly from the Thermidistat™ HUM
terminal (See Fig. 6,7&8).

HUMIDISTAT

HUM 1

(C)

HUM 2

(G)

24-VAC

HUMIDIFIER WIRING

Fig. 6—Humidifier Wiring-48GP

EASY SELECT

BOARD TERMINAL

BLOCK

D

J1

REMOVE

JUMPER

H

R

Fig. 7—Humidistat Wiring for

De-Humidify Mode-48GP

d. DEHUMIDIFY CAPABILITY WITH STANDARD

HUMIDISTAT CONNECTION
Latent capacities for this unit are better than average systems. If
increased latent capacity is an application requirement, the ICM
board provides connection terminals for use of a standard
humidistat. The unit will detect the humidistat contacts opening
on increasing humidity and reduce its airflow to approximately
80 percent of nominal cooling mode airflow. This reduction
will increase the system latent capacity until the humidity falls
to a level which causes the humidistat to close its contacts.
When the contacts close, the airflow will return to 100 percent
of selected cooling airflow. To activate this mode, remove
jumper J1 and wire in a standard humidistat (See Fig. 7).

e. DEHUMIDIFY AND SUPER DEHUMIDIFY

CAPABILITIES
This model unit is capable of responding to a signal from indoor
system control (Thermidistat™ or capable zoning control) to
operate in comfort control modes such as Super Dehumidify
Mode. Consult literature provided with indoor system control to
determine if these operating modes are available, and to see
control set up instructions. No special setup or wiring of unit is
required.

48GP SEQUENCE OF OPERATION

a. CONTINUOUS FAN

(1.) Thermostat closes circuit R to G—The Blower runs at

continuous fan airflow

4

TO HUMIDIFIER

A95317

HUMIDISTAT

A95316

b. COOLING MODE

(1.) If indoor temperature is above temperature set point and

humidity is below humidity set point, thermostat closes
circuits R to G, R to Y/Y2 and R to O—The unit delivers
single speed cooling airflow.

c. COOLING MODE-DEHUMIDIFICATION

(1.) If indoor temperature is above temperature set point and

humidity is above humidity set point, thermostat or Ther­midistat™ closes circuits R to G, R to Y/Y2, R to O and
humidistat or Thermidistat™ opens R to DH—The unit
delivers airflow which is approximately 80 percent of the
nominal cooling airflow to increase the latent capacity of
the system.

d. COOLING MODE-SUPER DEHUMIDIFY OPERATION

(SEE QUICK REFERENCE GUIDE)

NOTE: The indoor control used, such as a Thermidistat™, must
be capable of providing Super Dehumidify operation mode and
control must be configured as outlined in its installation instruc­tions. Consult indoor control literature to determine if control is
capable of providing Super Dehumidify inputs and for configura­tion instruction.

(1.) If the indoor temperature is below the temperature set

point and the humidity is above the humidity set point, the
Thermidistat™ closes circuit R to O, opens circuits R to
DH and R to G, and closes circuit R to Y/Y2. If circuit R
to G is closed (24-v.), the motor will deliver airflow at the
full cooling or cooling plus dehumidify mode requested
value. If circuit R to G is open (0–v.) for Super Dehu­midify mode, the motor delivers reduced airflow to maxi­mize the humidity removal of the system while minimizing
over cooling.

e. GAS HEATING MODE

(1.) Thermostat closes circuit R to W/W1—The unit delivers

the selected gas heat airflow. The IGC will control a 45
sec. blower “On” delay and a 45 sec. “Off” delay.

EASY SELECT™—48JZ

NOTE: Either the Carrier Thermidistat™ or Dual Fuel ther­mostat is required for operation of the dual-fuel (48JZ) units.
Be sure to follow the installation instructions supplied with the
Thermidistat™. Either indoor temperature control must use
an outdoor air sensor to properly control heating operation.

EASY SELECT™ CONFIGURATION TAPS FOR 48JZ

Easy Select™ taps are used by the installer to configure a system.
The ICM motor uses the selected taps to modify its operation to a
pre-programmed table of airflows.
The unit must be configured to operate properly with system
components with which it is installed. To successfully configure a
basic system (see information printed on circuit board label located
next to select pins), move the 6 select wires to the pins which
match the components used (See Fig. 8).

a. GAS HEAT/CFM—SELECT GAS HEAT INPUT SIZE

Factory selected gas heat size should correspond to unit label.

b. AC/HP SIZE—SELECT SYSTEM SIZE INSTALLED

Factory selected air conditioner size should correspond to
capacity of unit installed. Installer should verify air conditioner
size to ensure that airflow delivered falls within proper range
for the size unit installed. This applies to all operational modes.

c. SYSTEM TYPE—SELECT SYSTEM TYPE INSTALLED

Factory selected on 48JZ for HP-EFF.
SELECT OPTIONS

1. HP-COMFORT provides approximately 315 CFM/ton for
higher normal heating air temperature and provides approxi-

9 PIN CONNECTOR

ICM PRINTED CIRCUIT BOARD

SEC1 SEC2

EASY SELECT

GAS HEAT/CFM

090

060

1250

A

B

C

D

E

F

VIO

BLU

ORN

BLK

WHT

YEL

1100

AC/HP SIZE

036 030 024 018

SYSTEM TYPE

AC

AC/HP CFM ADJUST

NOM HI

ON/OFF DELAY

09030900

CONTINUOUS FAN

MED HI YELLO

TM

040
800

HP-COMFORT

HP-EFF

LO

0

HEATER/MOTOR

N/A

ENH

12 PIN CONNECTOR

J2

J1

AUX1 HUM1

AUX2

24VAC

GRY

D
R

W
W
Y
Y/ Y
G
O

C

HUM2

H

1

2

1

2

C01039

Fig. 8—Detail of SPP Printed-Circuit Board

mately 350 CFM/ton cooling airflow for good humidity re­moval

2. HP-EFF (factory selected) Provides equal airflow for heating
and cooling modes to increase overall heat pump efficiency.
Provides approximately 400 CFM/ton.

d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW, OR

HIGH AIRFLOW

The AC/HP CFM Adjust select is factory set to the High-HI
(NOM for 036, 060) tap. The CFM Adjust selections NOM/LO
will regulate airflow supplied for all operational modes, except
non-heat pump heating modes. HI provides 15 percent airflow
over nominal unit size selected and LO provides 10 percent
airflow below nominal unit size selected. Adjust selection
options are provided to adjust airflow supplied to meet indi­vidual installation needs for such things as noise, comfort, and
humidity removal (See Fig. 8, D as indicated).

e. ON/OFF DELAY—SELECT DESIRED

TIME DELAY PROFILE

Four motor operation delay profiles are provided to customize
and enhance system operation (See Fig. 8, E as indicated).
Selection options are:

(1.) The standard 90 sec off delay (Factory Setting) at 100

percent airflow in cooling or heat pump heating mode. In
gas heating mode, IGC will control a 45 sec “On” delay
and a 45 sec “Off” delay.

(2.) A 30 sec cooling delay with no airflow/ 90 sec off delay at

100 percent airflow profile is used when it is desirable to
allow system coils time to cool-down/heat-up in conjunc­tion with the airflow in cooling or heat pump heating
mode.

(3.) A no delay option used for servicing unit or when a

thermostat is utilized to perform delay functions. In gas
heating mode IGC will control 45 sec on delay with no
airflow and 45 sec off delay.

5

(4.) ENH (enhanced) selection provides a 30 sec. cooling &

heat pump on delay with no airflow, plus 150 seconds at 70
percent airflow and no off delay for added comfort. This
will minimize cold blow in heat pump operation and could
enhance system efficiency.

f. CONTINUOUS FAN—SELECT DESIRED FAN SPEED

WHEN THERMOSTAT IS SET ON CONTINUOUS FAN

(1.) LO speed—Factory setting, 50 percent cooling mode

airflow.

(2.) MED speed—Move connector to MED, 65 percent cooling

mode airflow.

(3.) HI speed—Move connector to HI, 100 percent cooling

mode airflow (See Fig. 8, F as indicated).

g. LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE

The low-voltage circuit is fused by a board-mounted 5–amp
automotive fuse placed in series with the transformer SEC2 and
the R circuit. The C circuit of the transformer is referenced to
chassis ground through a printed circuit run at SEC1 connected
to metal standoff marked with ground symbol.

h. BASIC UNIT CONFIGURATION

The following basic configuration of the indoor motor will
provide ARI rated performance of the 48JZ. This BASIC

CONFIGURATION should be used when the rated ARI perfor­mance is required.

(1.) HEAT-Factory selected to match heat input size.

(2.) AC/HP Size-Factory selected to match system size, please

verify.

(3.) SYSTEM TYPE-Factory selected on 48JZ system for

HP-EFF.

(4.) AC/HP CFM ADJUST-Select HIGH for 042 & 048, NOM

for 036 & 060, and LO for 024 & 030.

(5.) ON/OFF DELAY-Factory selected 0/90 profile.

(6.) CONTINUOUS FAN-Select desired fan speed when ther-

mostat is set to continuous fan.

i. COMFORT OPTIONS—SUPER DEHUMIDIFY (See Quick

Reference Guide)

The Super Dehumidify option is possible when this unit is
installed with a field supplied Thermidistat™ control (Super­Dehumidify does not require an outdoor temperature sensor).
The following configuration is recommended for maximum
cooling/dehumidifying comfort. This configuration will im­prove the comfort provided by the air conditioning system if
more humidity removal is desired. While providing this im­proved comfort, the system will operate efficiently, but not at
the published ARI SEER efficiency.
The following system configuration is recommended for maxi­mum cooling/dehumidifying comfort (See Fig. 8).

(1.) HEAT-Factory selected to match gas heat size of unit

installed.

(2.) AC/HP Size-Factory selected to match system size, please

verify.

(3.) SYSTEM TYPE-Factory selected on 48JZ system for

HP-EFF.

(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060).

(5.) ON/OFF DELAY-Select ENH profile.

(6.) CONTINUOUS FAN-Select desired fan speed when ther-

mostat is set to continuous fan.

(7.) LOW VOLTAGE CONNECTIONS-Make connections as

shown in ELECTRICAL CONNECTIONS section.

(8.) CONFIGURE THERMIDISTAT™-Follow Thermidis-

tat™ installation instructions for Super Dehumidify opera­tion.

ACCESSORY INSTALLATION

a. AUXILIARY TERMINALS

The AUX and HUM terminals on the Easy Select™ Board are
tied directly to the G terminal, and provide a 24-v. signal
whenever the G terminal is energized (See Fig. 9). During
Super dehumidify mode, the G signal is not present and the
auxiliary terminals are not energized. If the installation includes
the use of this operating mode, do not use these terminals to
control accessories. See Electronic Air Cleaner and Humidifier
sections for further information.

b. ELECTRONIC AIR CLEANER CONNECTIONS

The AUX1 and AUX2 terminals are not always energized
during blower operations, as described above. When using an
electronic air cleaner with the unit, use Airflow Sensor P/N.
KEAAC0101AAA. The airflow sensor turns on electronic air
cleaner when the blower is operating.

c. HUMIDIFIER / THERMIDISTAT™ CONNECTIONS

Easy Select™ Board terminals HUM1 and HUM2 are provided
for direct connection to the low-voltage control of a humidifier
through a standard Thermidistat™ (See Fig. 9). These terminals
are energized with 24-v. when G thermostat signal is present
(See Fig. 10). Alternately, the 24-v. signal may be sourced from
the W and C on the 9 pin connector. When using a Thermidis­tat™ Control the 24-v. signal may be sourced directly from the
Thermidistat™ HUM terminal (See Fig. 8, 9 & 10).

THERMIDISTAT ™

HUM 1

(C)

HUM 2

(G)

24-VAC

HUMIDIFIER WIRING

Fig. 9—Humidifier Wiring-48JZ

EASY SELECT

BOARD TERMINAL

BLOCK

D

J1

JUMPER

H

R

Fig. 10—Thermidistat™ Wiring for

De-Humidify Mode-48JZ

d. DEHUMIDIFY CAPABILITY WITH STANDARD

THERMIDISTAT™ CONNECTION

Latent capacities for this unit are better than average systems. If
increased latent capacity is an application requirement, the ICM
board provides connection terminals for use of a Thermidis­tat™. The unit will detect the Thermidistat™ contacts opening
on increasing humidity and reduce its airflow to approximately
80 percent of nominal cooling mode airflow. This reduction
will increase the system latent capacity until the humidity falls

6

TO HUMIDIFIER

C01108

THERMIDISTAT

C01109

to a level which causes the Thermidistat™ to close its contacts.
When the contacts close, the airflow will return to 100 percent
of selected cooling airflow. To activate this mode wire in
Thermidistat™ see jumper in Fig. 10.

e. DEHUMIDIFY AND SUPER DEHUMIDIFY

CAPABILITIES

This model unit is capable of responding to a signal from
Thermidistat™ to operate in comfort control modes such as
Super Dehumidify Mode. Consult literature provided with
Thermidistat™ to determine if these operating modes are
available, and to see control set up instructions. No special
setup or wiring of unit is required.

48JZ SEQUENCE OF OPERATION

a. CONTINUOUS FAN

(1.) Thermostat closes circuit R to G—The Blower runs at

continuous fan airflow

b. COOLING MODE

(1.) If indoor temperature is above temperature set point and

humidity is below humidity set point, thermostat closes
circuits R to G, R to Y/Y2 and R to O—The unit delivers
single speed cooling airflow.

c. COOLING MODE-DEHUMIDIFICATION

(1.) If indoor temperature is above temperature set point and

humidity is above humidity set point, Thermidistat™
closes circuits R to G, R to Y/Y2, R to O and Thermidis­tat™ opens R to DH—The unit delivers airflow which is
approximately 80 percent of the nominal cooling airflow to
increase the latent capacity of the system.

d. COOLING MODE-SUPER DEHUMIDIFY OPERATION

(SEE QUICK REFERENCE GUIDE)

NOTE: Thermidistat™ is capable of providing Super Dehu­midify operation mode and must be configured as outlined in its
installation instructions. Consult indoor control literature to deter­mine if control is capable of providing Super Dehumidify inputs
and for configuration instruction.

(1.) If the indoor temperature is below the temperature set

point and the humidity is above the humidity set point, the
Thermidistat™ closes circuit R to O, opens circuits R to
DH and R to G, and closes circuit R to Y/Y2. If circuit R
to G is closed (24-v.), the motor will deliver airflow at the
full cooling or cooling plus dehumidify mode requested
value. If circuit R to G is open (0–v.) for super dehumidify
mode, the motor delivers reduced airflow to maximize the
humidity removal of the system while minimizing over
cooling.

e. GAS HEATING MODE

(Occurs if outdoor temperature is below outdoor temperature
change over setpoint.)

(1.) Thermostat closes circuit R to W/W1—The unit delivers

the selected gas heat airflow. The IGC will control 45 sec.
on delay with no airflow and 45 sec. off delay.

f. HEAT PUMP HEATING MODE

(Occurs if outdoor temperature is above outdoor temperature
change over setpoint.)

(1.) Thermidistat™ closes circuit R to G and R to Y/Y2–The

unit delivers selected heat pump heating airflow.

g. HEATING MODE—SUPER COMFORT HEAT OPERA-

TION

NOTE: The Thermidistat™ is capable of providing Super Com­fort Heat operation mode and must be configured as outlined in its
installation instructions. The system must be installed with appro­priate outdoor temperature sensor. Consult Thermidistat™ litera­ture for configuration instructions. Consult sensor instructions for
sensor installation details.

If the outdoor temperature is in the range of 12° to 40° F, the
Thermidistat™ closes circuit R to Y/Y2 and opens circuit R to G.
If circuit R to G is closed (24-v.), the motor will deliver airflow at
the full heating requested value. If circuit R to G is open (0-v.) for
maximum heating comfort, the motor delivers reduced airflow to
maximize the temperature and minimize the draft effect of the
heated air leaving the unit.

EASY SELECT™—50GL & 50JZ

9 PIN CONNECTOR

ICM PRINTED CIRCUIT BOARD

SEC1 SEC2

EASY SELECT

AUX HEAT KW/CFM

0-30

0-20

1075

A

B

C

D

E

F

VIO

BLU

ORN

BLK

WHT

YEL

875

AC/HP SIZE

036 030 024 018

SYSTEM TYPE

AC

AC/HP CFM ADJUST

NOM HI

ON/OFF DELAY

09030900

CONTINUOUS FAN

MED HI YELLO

TM

0-10

725

HP-COMFORT

HP-EFF

LO

0

HEATER/MOTOR

ENH

0-5
625

12 PIN CONNECTOR

J2

J1

AUX1 HUM1

AUX2

24VAC

GRY

HUM2

D
R

W
W
Y
Y/ Y
G
O

C

H

1

2

1

2

C01033

Fig. 11—Detail of SPP Printed-Circuit Board

EASY SELECT™ CONFIGURATION TAPS FOR 50GL &
50JZ

Easy Select™ taps are used by the installer to configure a system.
The ICM motor uses the selected taps to modify its operation to a
pre-programmed table of airflows.
The unit must be configured to operate properly with system
components with which it is installed. To successfully configure a
basic system (see information printed on circuit board label located
next to select pins), move the 6 select wires to the pins which
match the components used.

a. AUX HEAT kW/CFM—SELECT HEATER RANGE FOR

SIZE OF ELECTRIC HEATER INSTALLED

Installer must select the auxiliary heat airflow approved for
application with kW size heater installed. If no heater is
installed, this step can be skipped. Each select pin is marked
with a range of heaters for which airflow (also marked), is
approved. For increased comfort, select the narrowest kW range
matching the heater size, for example, 0–10 for 10–kW heater.
This airflow must be greater than the minimum for CFM for
electric heater application with the size system installed for safe

7

and continuous operation. (See Tables 16, 17 & 18 for airflow
delivery and minimum CFM.) Note that airflow marked is the
airflow which will be supplied in emergency heat mode and
heating mode on air conditioners when electric heat is the
primary heating source. In heat pump heating mode when
electric heaters are energized, the ICM will run the higher of
heat pump heating airflow and electric heater airflow to ensure
safe heater operation. The factory selection is the largest heater
range approved (See Fig. 11, A as indicated).

b. AC/HP SIZE—SELECT SYSTEM SIZE INSTALLED

The factory setting for air conditioner or heat pump size is the
size which matches the model of packaged unit installed.
Installer should verify air conditioner or heat pump size to
ensure that airflow delivered falls within proper range for the
size unit installed. This applies to all operational modes with
the exception of electric heat modes (See Fig. 11, B as
indicated).

c. SYSTEM TYPE—SELECT SYSTEM TYPE INSTALLED

The type of system will be factory selected (see below for
details):

(1.) AC-Air conditioner (Factory Selected for 50GL)

(2.) HP-COMFORT—Heat Pump Comfort provides approxi-

mately 315 CFM per ton for higher normal heating air
delivery temperature and provides approximately 350
CFM per ton cooling airflow for good humidity removal.

(3.) HP-EFF (Factory Selected for 50JZ)— Heat Pump Effi-

ciency provides same airflow for heating and cooling
modes to increase overall HP efficiency; approximately
350 CFM per ton.

d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW, OR

HIGH AIRFLOW

The AC/HP CFM Adjust select is factory set to the High-Hi
(NOM for 060) tap. The CFM Adjust selections NOM/LO will
regulate airflow supplied for all operational modes, except
non-heat pump heating modes. HI provides 15 percent airflow
over nominal unit size selected and LO provides 10 percent
airflow below nominal unit size selected. CFM Adjust selection
options are provided to adjust airflow supplied to meet indi­vidual installation needs for such things as noise, comfort, and
humidity removal (See Fig. 11, D as indicated).

e. ON/OFF DELAY—SELECT DESIRED

TIME DELAY PROFILE

Four motor operation delay profiles are provided to customize
and enhance system operation (See Fig. 11, E as indicated).
Selection options are:

(1.) The standard 90 sec off delay (Factory Setting) at 100

percent airflow in cooling or heat pump heating mode.

(2.) A 30 sec cooling delay with no airflow/90 sec off delay at

100 percent airflow profile is used when it is desirable to
allow system coils time to heat-up/cool-down in conjunc­tion with the airflow in cooling or heat pump heating
mode.

(3.) A no delay option used for servicing unit or when a

thermostat is utilized to perform delay functions.

(4.) ENH, enhanced selection, provides a 30 sec cooling on

delay with no airflow/ plus 150 sec at 70 percent airflow/
no off delay for added comfort.
This will minimize cold blow in heat pump operation
(50JZ only) and could enhance system efficiency.

f. CONTINUOUS FAN—SELECT DESIRED FAN SPEED

WHEN THERMOSTAT IS SET ON CONTINUOUS FAN

(1.) LO speed—Factory setting, 50 percent cooling mode

airflow.

(2.) MED speed—Move connector to MED, 65 percent cooling

mode airflow.

(3.) HI speed—Move connector to HI, 100 percent cooling

mode airflow (See Fig. 11, F as indicated).

g. LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE

The low-voltage circuit is fused by a board-mounted 5–amp
automotive fuse placed in series with the transformer SEC2 and
the R circuit. The C circuit of the transformer is referenced to
chassis ground through a printed circuit run at SEC1 connected
to metal standoff marked with ground symbol.

h. BASIC UNIT CONFIGURATION

The following basic configuration of the indoor motor will
provide ARI rated performance of the System. This BASIC

CONFIGURATION should be used when the rated ARI perfor­mance is required, or if system enhancements such as super
dehumidify are not needed.

(1.) AUX HEAT kW/CFM-Select the heater range for the size

of electric heater installed (skip this step if no heater is
installed).

(2.) AC/HP SIZE-Factory selected to match system size in-

stalled, please verify.

(3.) SYSTEM TYPE-Factory selected AC (50GL) or HP-EFF

(50JZ).

(4.) AC/HP CFM ADJUST-Select HIGH for 042 & 048, NOM

for 036 & 060, and LO for 024 & 030.

(5.) ON/OFF DELAY-Select 0/90 profile.

(6.) CONTINUOUS FAN-Select desired fan speed when ther-

mostat is set to continuous fan.

i. COMFORT OPTIONS—SUPER DEHUMIDIFY (See Quick

Reference Guide)

The Super Dehumidify option is possible when this unit is
installed with a field supplied Thermidistat™ control (Super
Dehumidify does not require an outdoor temperature sensor).
The following configuration is recommended for maximum
cooling/dehumidifying comfort: This configuration will im­prove the comfort provided by the air conditioning system if
more humidity removal is desired. While providing this im­proved comfort, the system will operate efficiently, but not at
the published HSPF or ARI SEER efficiency.
The following system configuration is recommended for maxi­mum heating and cooling/dehumidifying comfort (See Fig. 11).

(1.) AUX HEAT kW/CFM-Select the narrowest heater range to

match size of electric heater installed (skip this step if no
heater is installed).

(2.) AC/HP Size-Factory selected to match system size in-

stalled, please verify.

(3.) SYSTEM TYPE-Select system type HP-COMFORT (for

heat pump system) or AC (for air conditioner system).

(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060).

(5.) ON/OFF DELAY-Select ENH profile.

(6.) CONTINUOUS FAN-Select desired fan speed when ther-

mostat is set to continuous fan.

(7.) DEHUMIDIFY MODE-Remove J1 jumper to activate.

(8.) LOW VOLTAGE CONNECTIONS-Make connections as

shown in ELECTRICAL CONNECTIONS section.

(9.) CONFIGURE THERMIDISTAT™ (or capable zoning

system)-Following its installation instructions for Super
Dehumidify and Super Comfort Heat operation.

8

This configuration provides the following comfort enhance­ments:

(a.) A 30 sec blower on delay with 150 sec at 70 percent

airflow to allow the indoor coil to warm up or cool
down before the blower is asked to deliver 100 percent
airflow reducing the cold blow sensation at start up in
heating and allowing the indoor coil to more quickly
reach wet coil operating conditions in cooling.

(b.) A no blower off delay eliminates cold blow which may

be associated with running the blower after shut down
of the compressor and avoids re-evaporation of con­densed moisture after cooling/dehumidifying opera­tion.

(c.) Lower airflow while the compressor is running to

reduce draft effects and increase heating air tempera­ture and improved humidity control during cooling
operation.

ACCESSORY INSTALLATION

a. ACCESSORY ELECTRIC HEATERS

Electric heaters may be installed with the 50GL & 50JZ units
per instructions supplied with electric heater package. See unit
rating plate for factory-approved electric heater kits.

b. AUXILIARY TERMINALS

The AUX and HUM terminals on the Easy Select™ Board are
tied directly to the G terminal, and provide a 24-v. signal
whenever the G terminal is energized (See Fig. 12). During
Super dehumidify mode, the G signal is not present and the
auxiliary terminals are not energized. If the installation includes
the use of the operating mode, do not use these terminals to
control accessories. See Electronic Air Cleaner and Humidifier
sections for further information.

c. ELECTRONIC AIR CLEANER CONNECTIONS

The AUX1 and AUX2 terminals are not always energized
during blower operations, as described above. When using an
electronic air cleaner with the unit, use Airflow Sensor P/N
KEAAC0101AAA. The airflow sensor turns on electronic air
cleaner when the blower is operating.

d. HUMIDIFIER/HUMIDISTAT CONNECTIONS

Easy Select™ Board terminals HUM1 and HUM2 are provided
for direct connection to the low-voltage control of a humidifier
through a standard humidistat (See Fig. 12). These terminals are
energized with 24-v. when G thermostat signal is present. (See
Fig. 11, 12 & 13). Alternately, the 24-v. signal may be sourced
from the W and C circuit board connections. When using a
Thermidistat™ Control, Zone Comfort Plus or Comfort Zone
II, the 24-v. signal may be sourced directly from the Thermi­distat™ HUM terminal.

HUMIDISTAT

HUM 1

(C)

HUM 2

(G)

24-VAC

HUMIDIFIER WIRING

TO HUMIDIFIER

Fig. 12—Humidifier Wiring for 50GL & 50JZ

e. DEHUMIDIFY CAPABILITY WITH STANDARD

HUMIDISTAT CONNECTION

Latent capacities for these units are better than average systems.
If increased latent capacity is an application requirement, the
circuit board provides connection terminals for use of a

A95317

EASY SELECT

BOARD TERMINAL

BLOCK

D

J1

REMOVE

JUMPER

H

HUMIDISTAT

R

A95316

Fig. 13—Humidistat Wiring for De-Humidify Mode-

for 50GL & 50JZ

standard humidistat. The unit will detect the humidistat contacts
opening on increasing humidity and reduce its airflow to
approximately 80 percent of nominal cooling mode airflow.
This reduction will increase the system latent capacity until the
humidity falls to a level which causes the humidistat to close its
contacts. When the contacts close, the airflow will return to 100
percent of selected cooling airflow. To activate this mode,
remove jumper J1 and wire in a standard humidistat ( See Fig.

13).

f. DEHUMIDIFY AND SUPER DEHUMIDIFY CAPABILITIES

these models are capable of responding to a signal from indoor
system control (thermostat, Thermidistat™, zoning control) to
operate in comfort control modes such as Super Dehumidify
Mode. Consult literature provided with indoor system control to
determine if these operating modes are available, and to see
control set up instructions. No special setup or wiring of unit is
required.

50GL & 50JZ SEQUENCE OF OPERATION

a. CONTINUOUS FAN

(1.) Thermostat closes circuit R to G—The Blower runs at

continuous fan airflow.

b. COOLING MODE-LOW HUMIDITY

(1.) If indoor temperature is above temperature set point and

humidity is below humidity set point, thermostat closes
circuits R to G, R to Y/Y2 and R to O—The unit delivers
cooling airflow.

c. COOLING MODE-DEHUMIDIFICATION

(1.) If indoor temperature is above temperature set point and

humidity is above humidity set point, thermostat or Ther­midistat™ closes circuits R to G, R to O, and R to Y/Y2
and humidistat or Thermidistat™ opens R to DH—The
unit delivers airflow which is approximately 80 percent of
the nominal cooling airflow to increase the latent capacity
of the system.

d. COOLING MODE-SUPER DEHUMIDIFY OPERATION (see

quick reference guide)

NOTE: The indoor control used, such as a Thermidistat™, must
be capable of providing Super Dehumidify operation mode and
control must be configured as outlined in its installation instruc­tions. Consult indoor control literature to determine if control is
capable of providing Super Dehumidify inputs and for configura­tion instruction.

(1.) If the indoor temperature is below the temperature set

point and the humidity is above the humidity set point, the
Thermidistat™ closes circuit R to O, opens circuits R to
DH and R to G, and cycles circuit R to Y/Y2. If circuit R
to G is closed (24-v.), the motor will deliver airflow at the
full cooling or cooling plus dehumidify mode requested

9

value. If circuit R to G is open (0–v.) for super dehumidify
mode, the motor delivers reduced airflow to maximize the
humidity removal of the system while minimizing over
cooling.

e. ELECTRIC HEATING MODE

(1.) Thermostat closes circuit R to W/W1, or W2—The unit

delivers the selected electric heat airflow. There are no on
or off delays.

f. HEAT PUMP HEATING MODE (50JZ only)

(1.) Thermostat closes circuits R to G and R to Y/Y2—The unit

delivers selected heat pump heating airflow.

g. HEAT PUMP HEATING WITH AUXILIARY

ELECTRIC HEAT (50JZ only)

(1.) Thermostat closes circuits R to G, R to Y/Y2 and R to

W/W1 or W2 (and R to O in the case of defrost).

In the event that electric heating is called for by the thermostat
while the heat pump is also operating in either heating or
defrost modes, the motor will modify its airflow output, if
necessary, to provide an airflow which is defined as safe for the
operation of the electric heater during heat pump operation.
That airflow is the greater of the heat pump heating airflow and
the electric heater only airflow.

h. HEATING MODE—SUPER COMFORT HEAT OPERA-

TION

NOTE: The indoor control used, such as a Thermidistat™, must
be capable of providing Super Comfort Heat operation mode and
control must be configured as outlined in its installation instruc­tions. The system must be installed with appropriate outdoor
temperature sensor. Consult indoor control literature to determine
if control is capable and for configuration instructions. Consult
indoor control instructions and sensor instructions for sensor
installation details.

If the outdoor temperature is in the range of 12° to 40° F, the
Thermidistat™ closes circuit R to Y/Y2 and opens circuit R to G.
If circuit R to G is closed (24-v.), the motor will deliver airflow at
the full heating requested value. If circuit R to G is open (0-v.) for
maximum heating comfort, the motor delivers reduced airflow to
maximize the temperature and minimize the draft effect of the
heated air leaving the unit.

ICM FIOP START-UP

ICM General Start Up

CHECKING AND ADJUSTING REFRIGERANT CHARGE
The refrigerant system is fully charged with Puron® (R-410A)
refrigerant, and is tested and factory sealed.

NOTE: Adjustment of the refrigerant charge is not required
UNLESS the unit is suspected of not having the proper R-410A
charge.

The charging label and the tables shown refer to system tempera­tures and pressures. The temperatures and pressures are calculated
at rated airflow. When charging unit, set to rated airflow. A
refrigerant charging chart label is attached to the outside of the
compressor access door. The chart includes the required suction
line temperature at given suction line pressures and outdoor
ambients. An accurate superheat, thermocouple- or thermistor-type
thermometer, and 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

IMPORTANT: When evaluating the refrigerant charge, an indi­cated adjustment to the specified factory charge must always be
very minimal. If a substantial adjustment is indicated, an abnormal
condition exists somewhere in the cooling system, such as insuf-

ficient airflow across either one or both coils.

Step 1—48GP Start-Up (ICM FIOP)

CHECKING COOLING CONTROL OPERATION-Start and
check the unit for proper cooling control operation as follows:

(1.) Place room thermostat SYSTEM switch in OFF position.

Observe that blower motor starts when FAN switch is
placed in ON position and shuts down when FAN switch
is placed in AUTO position. Note fan delay time setting
selected on the Easy Select™ board. (See Easy Select
Section.)

(2.) Place SYSTEM switch in COOL position and FAN switch

in AUTO position. Set cooling control below room tem­perature. Observe that compressor, condenser fan, and
evaporator blower motors start. Observe that cooling cycle
shuts down when control setting is satisfied. The evapo­rator fan will continue to run for the time setting selected
on Easy Select™ board. (See Easy Select Section.)

(3.) When using an auto-changeover room thermostat, place

both SYSTEM and FAN switches in AUTO position.
Observe that unit operates in heating mode when tempera­ture control is set to “call for heating” (above room
temperature) and operates in cooling mode when tempera­ture control is set to “call for cooling” (below room
temperature).

AIRFLOW AND TEMPERATURE RISE-The heating section for
each size unit is designed and approved for heating operation
within the temperature rise range stamped on the unit rating plate.
Table 15 shows the approved temperature rise range for each
heating input, and the air delivery (CFM) at various temperature
rise ranges.
The heating operation airflow must produce a temperature rise that
falls with in the approved range.
Refer to Indoor Airflow and Airflow Tables on the following
pages to adjust heating airflow when required.

CHECK HEATING CONTROL-Start and check the unit for
proper heating control operation as follows. (see furnace lighting
instructions located inside burner or blower access panel.):

(1.) Place room thermostat SYSTEM switch in the HEAT

position and the FAN switch in the AUTO position.

(2.) Set the heating temperature control of the thermostat above

room temperature.

(3.) The induced-draft motor will start.

(4.) After a call for heating, the main burner should light with

in 5 sec. If the burners still do not light, this sequence is
repeated. If the burners do not light within 15 minutes from
the initial call for heat, there is a lockout. To reset the
lockout control, break the 24-v. power to W.

(5.) The indoor fan will turn on 45 sec after the flame has been

established. The indoor fan will turn off according to time
delay selected on the Easy Select™ board (See Easy Select
Section) after the thermostat has been satisfied.

Step 2—48JZ Start-Up (ICM FIOP)

Also refer to the Thermidistat™ instructions for start up and
check out of the system.

(1.) FAN OPERATION—

The fan button on Thermidistat™ switches fan icon
between AUTO and ON. While ON is displayed, output
will be on, turning fan on. Allow up to 10 sec. after button
is pressed for fan to turn on and off. the fan will continue
to run for the time setting selected on the Easy Select™
board after AUTO icon is displayed.

10

(2.) COOLING MODE—

Press MODE button on the Thermidistat™ until COOL
icon is displayed. Cooling begins within 10 sec. and
remains on for 4 minutes. Observe that compressor,
outdoor fan and indoor blower motors start after the call
for Cooling. At the end of 4 minutes, the cooling cycle
stops and the MODE reverts back to OFF. The Indoor
Blower continues to run for the time selected on the Easy
Select™ board after OFF icon is displayed.

(3.) HEAT PUMP HEATING—

Press MODE button on the Thermidistat™ until HEAT
icon is displayed. Heat pump heating begins within 10 sec.
and remains on for 4 minutes. Observe that the compres­sor, outdoor fan and indoor blower come on. At the end of
the 4 minutes, heating cycle stops and the MODE reverts
back to OFF. The indoor blower continues to run for the
time selected on the Easy Select™ Board after the OFF
icon is displayed. Heating maybe turned off anytime
during the 4 minute cycle by pressing MODE button until
OFF is displayed.

(4.) GAS HEAT MODE—

Press MODE button until E-HEAT(Emergency Heat or
Back-Up Heat) icon is displayed. Gas heating begins
within 10 sec. and remains on for 4 minutes. The induced
draft motor should start immediately. The burners should
light within 5 sec. of E-HEAT call. The indoor blower will
turn on 45 sec. after the flame has been established. Gas
heating stops at the end of 4 minutes and MODE reverts
back to OFF. The indoor blower continues to run for the
time selected on the Easy Select™ Board after the OFF
icon is displayed.

NOTE: If the burners do not light, this lighting sequence is
repeated for 15 minutes from the initial call for E-HEAT. If after
15 minutes the burners do not light, there will be a lockout. To
reset the burner lockout control, break the 24-v. power to “W”.

(5.) AUTOMATIC CHANGE-OVER—

To test AUTO CHANGE-OVER function between COOL
and HEAT:
Enable the AUTO CHANGE-OVER mode during Thermi­distat™ set-up. Refer to the Thermidistat™ literature for
details. Observe that the unit operates in cooling when in
COOL MODE (when setting is below room temperature)
and HEAT MODE (when setting is above room tempera­ture).

AIRFLOW AND TEMPERATURE RISE-The heating section for
each size unit is designed and approved for heating operation
within the temperature rise range stamped on the unit rating plate.
Table 15 shows the approved temperature rise range for each
heating input, and the air delivery (CFM) at various temperature
rise ranges.
The heating operation airflow must produce a temperature rise that
falls with in the approved range.
Refer to Indoor Airflow and Airflow Tables on the following
pages to adjust heating airflow when required.

Step 3—50GL: Start-Up (ICM FIOP)

CHECKING COOLING CONTROL OPERATION–Start and
check the unit for proper cooling control operation as follows:

(1.) Place room thermostat SYSTEM switch in OFF position.

Observe that blower motor starts when FAN switch is
placed in ON position and shuts down when FAN switch
is placed in AUTO position.

(2.) Place SYSTEM switch in COOL position and FAN switch

in AUTO position. Set cooling control below room tem-

perature. Observe that compressor, condenser fan, and
evaporator blower motors start. Observe that cooling cycle
shuts down when control setting is satisfied. The evapo­rator fan will continue to run for the selected off delay.

(3.) When using an auto-changeover room thermostat, place

both SYSTEM and FAN switches in AUTO positions.
Observe that unit operates in heating mode when tempera­ture control is set to ‘‘call for heating’’ (above room
temperature) and operates in cooling mode when tempera­ture control is set to ‘‘call for cooling’’ (below room
temperature).

NOTE: Once the compressor has started and then has stopped, it
will not start again until 5 minutes have elapsed. (The cooling
cycle remains ‘‘on’’ until the room temperature drops to point that
is slightly below the cooling control setting of the room thermostat.
At this point, the thermostat ‘‘breaks’’ the circuit between ther­mostat terminal R to terminals Y and G.) These open circuits
de-energize contactor coil C and ICM board. The condenser and
compressor motors stop. After the time delay setting selected on
the Easy Select™ board (See Easy Select Section) , the blower
motor stops. The unit is in a ‘‘standby’’ condition, waiting for the
next ‘‘call for cooling’’ from the room thermostat.

Step 4—50JZ: Start-Up (ICM FIOP)

CHECKING COOLING AND HEATING CONTROL OPERA­TION– Start and check the unit for proper control operation as
follows:

(1.) Place room thermostat SYSTEM switch or MODE control

in OFF position. Observe that blower motor starts when
FAN mode is placed in FAN ON position and shuts down
according to time delay selected on the Easy Select™
board (See Easy Select Section) when FAN MODE switch
is placed in AUTO position.

(2.) Thermostat:

When the room temperature rises to a point that is slightly
above the cooling control setting of the thermostat, the
thermostat completes the circuit between thermostat ter­minal R to terminals Y, O and G. These completed circuits
through the thermostat connect contactor coil (C) (through
unit wire Y) and ICM board (through unit wire G) across
the 24-v. secondary of transformer (TRAN).

Thermidistat™ or Thermostat and Humidistat:

When the room temperature rises to a point that is slightly
above the cooling control setting of the thermostat, the
thermostat completes the circuit between thermostat ter­minal R to terminals Y, O, DH, and G. These completed
circuits through the thermostat connect contactor coil (C)
(through unit wire Y) and ICM board (though unit wire G)
across the 24-v. secondary of transformer (TRANS).

(3.) Place system switch or MODE control in HEAT position.

Set control above room temperature. Observe that com­pressor, outdoor fan, and indoor blower motors start.
Observe that heating cycle shuts down according to time
delay selected on the Easy Select™ board (See Easy Select
Section) when control setting is satisfied.

(4.) When using an automatic changeover room thermostat,

place both SYSTEM or MODE control and FAN mode
switches in AUTO positions. Observe that unit operates in
Cooling mode when temperature control is set to “call for
Cooling” (below room temperature), and unit operates in
Heating mode when temperature control is set to “call for
Heating” (above room temperature).

NOTE: Once the compressor has started and then has stopped, it
should not be started again until 5 minutes have elapsed. The

11

Table 1—ICM FIOP Physical Data—Unit 48GP

THIS DATA APPLIES TO 48GP UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 48GP 024040 024060 030040 030060 036060 036090 042060 042090

NOMINAL CAPACITY (ton) 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2

OPERATING WEIGHT (lb.) 290 290 313 313 321 321 382 382

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb.)

REFRIGERANT METERING DEVICE

Orifice ID (in.)

AccuRater™ Piston

CONDENSER COIL

Rows...Fins/in.

Face Area (sq ft)

CONDENSER FAN

Nominal Cfm

Diameter (in.)

Motor HP (Rpm)

EVAPORATOR COIL

Rows...Fins/in.

Face Area (sq ft)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor (HP)

FURNACE SECTION*

Burner Orifice No. (Qty...Drill Size)

Natural Gas

Burner Orifice No. (Qty...Drill Size)

Propane Gas

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-

PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

RETURN-AIR FILTERS (in.)

Throwaway

* Based on altitude of 0 to 2000 ft.

5.0 5.0 5.5 5.5 6.9 6.9 9.0 9.0

.057 .057 .057 .057 .065 .065 .070 .070

1...17

10.9

2350

22

1/8 (825)

3...15

3.7

800

10X10

1/2

2...44

2...50

20X20X1 20X20X1 20X20X1 20X20X1 20X24X1 20X24X1 24X30X1 24X30X1

1...17

10.9

2350

22

1/8 (825)

3...15

3.7

800

10X10

1/2

2...38

2...46

1...17

12.7

2350

22

1/8 (825)

3...15

3.7

1000

10X10

1/2

2...44

2...50

1/8 (825)

1...17

12.7

2350

22

3...15

3.7

1000

10X10

1/2

2...38

2...46

610±15
420±25

Scroll

1

1/8 (825)

20±5

45±10

2...17

9.1

2350

22

3...15

3.7

1200

11X10

3/4

2...38

2...46

2...17

9.1

2350

22

1/8 (825)

3...15

3.7

1200

11X10

3/4

3...38

3...46

2...17

12.3

2350

22

1/8 (825)

3...15

4.7

1400

11X10

3/4

2...38

2...46

2...17

12.3

2350

22

1/8 (825)

3...15

4.7

1400

11 X 10

3/4

3...38

3...46

cooling cycle remains ‘‘on’’ until the room temperature drops to
point that is slightly below the cooling control setting of the room
thermostat. At this point, the thermostat ‘‘breaks’’ the circuit
between thermostat terminal R to terminals Y and G. These open
circuits de-energize contactor coil C and ICM board. The con­denser and compressor motors stop. After the time delay setting
selected on the Easy Select™ board (See Easy Select Section) , the
blower motor stops. The unit is in a ‘‘standby’’ condition, waiting
for the next ‘‘call for cooling’’ from the room thermostat. The 5
minute compressor delay also applies to heat pump heating mode.

ELECTRICAL DATA & SCHEMATICS—ICM FIOP

Step 1—Physical Data & Electrical Schematics

Use the Physical Data and Electrical Tables on the following pages
for information that applies to Carrier Puron® units with the ICM
indoor motor FIOP.

AIRFLOW & TEMPERATURE RISE TABLES—ICM FIOP

Step 2—Tables For System Set-Up

Use the Airflow and Temperature Rise Tables on the following
pages for information that applies to Carrier Puron® units with the
ICM indoor motor FIOP.

CARE AND MAINTENANCE

Indoor Blower and Motor

NOTE: All motors are pre-lubricated. Do not attempt to lubricate

these motors. For longer life, operating economy, and continuing
efficiency, clean accumulated dirt and grease from the blower
wheel and motor annually.

Disconnect and tag electrical power to the unit before
cleaning and lubricating any blower motor and wheel. On
units with gas heat, turn off the gas supply before disconnect­ing the electrical power. Failure to adhere to this warning
could cause serious injury or death.

To clean the blower motor and wheel:

1. 1. Remove and disassemble blower assembly as follows:

a. Remove unit access panel.

b. Carefully pivot blower access panel outward towards the

electrical box. Route wiring above blower access panel.

c. Disconnect the 5 and 16 pin plugs at the blower motor.

d. On all units, remove blower assembly from unit. Remove

screws securing blower to vertical partition and slide
assembly out. Be careful not to tear insulation in blower
compartment.

e. Ensure proper reassembly by marking blower wheel and

motor in relation to blower housing before disassembly.

12

Table 2—ICM FIOP Physical Data—Unit 48GP (Continued)

THIS DATA APPLIES TO 48GP UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 48GP 048090 048115 048130 060090 060115 060130

NOMINAL CAPACITY (ton) 444555

OPERATING WEIGHT (lb.) 421 421 421 468 468 468

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb.)

REFRIGERANT METERING DEVICE

Orifice ID (in.)

AccuRater™ Piston

CONDENSER COIL

Rows...Fins/in.

Face Area (sq ft)

CONDENSER FAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

EVAPORATOR COIL

Rows...Fins/in.

Face Area (sq ft)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor (HP)

FURNACE SECTION*

Burner Orifice No. (Qty...Drill Size)

Natural Gas

Burner Orifice No. (Qty...Drill Size)

Propane Gas

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

RETURN-AIR FILTERS (in.)

Throwaway

* Based on altitude of 0 to 2000 ft.

Scroll

1

9.5 9.5 9.5 10.0 10.0 10.0

.073 .073 .073 .086 .086 .086

2...17

12.3

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

3...38

3...46

24X30X1 24X30X1 24X30X1 24X30X1 24X30X1 24X30X1

2...17

12.3

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

3...33

3...42

2...17

12.3

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

3...31

3...41

1/4 (1100)

610±15
420±25

20±5

45±10

2...17

16.4

3300

22

4...15

4.7

2000

11X10

1.0

3...38

3...46

2...17

16.4

3300

22

1/4 (1100)

4...15

4.7

2000

11X10

1.0

3...33

3...42

2...17

16.4

3300

22

1/4 (1100)

4...15

4.7

2000

11X10

1.0

3...31

3...41

Table 3—48GP with ICM FIOP Electrical Data

VOLTAGE

UNIT

SIZE 48GP

024 208/230–1–60 187 253 13.5 61.0 0.9 4.3 22.1 30
030 208/230–1–60 187 253 14.7 73.0 0.9 4.3 23.6 30
036 208/230–1–60 187 253 15.4 83.0 0.9 6.8 27.0 35
042 208/230–1–60 187 253 18.6 105.0 0.9 6.8 31.0 40
048 208/230–1–60 187 253 20.5 109.0 1.6 6.8 34.0 40
060 208/230–1–60 187 253 27.6 158.0 1.6 9.2 45.2 60

V-PH-HZ

RANGE

MIN MAX RLA LRA FLA FLA MCA

COMPRESSOR

f. Loosen set-screw that secures wheel to motor shaft, remove

screws that secure motor mount brackets to blower housing,
and slide motor and motor mount out of blower housing.

2. Remove and clean blower wheel as follows:

a. Ensure proper reassembly by marking wheel orientation.

b. Lift wheel from housing. When handling and/or cleaning

blower wheel, be sure not to disturb balance weights (clips)
on blower wheel vanes.

c. Remove caked-on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from wheel
and housing with vacuum cleaner, using soft brush attach­ment. Remove grease and oil with mild solvent.

OUTDOOR FAN

MOTOR

INDOOR FAN

MOTOR

POWER SUPPLY

d. Reassemble wheel into housing.

e. Reassemble motor into housing. Be sure set-screw(s) are

tightened on motor shaft flats and not on round part of
shaft.

f. Pivot blower access panel back into place. Adjust wire

assemblies so that wiring follows proper pathways.

g. Reinstall unit access panel.

3. Restore electrical power, then gas supply to unit. Start unit and
check for proper blower rotation and motor speeds during
heating and cooling cycles.

TROUBLESHOOTING

START-UP CHECKLIST

MAX FUSE

OR CKT. BKR.

13

Fig. 14—ICM FIOP Electric Schematic—Unit 48GP

14

C01035

Table 4—ICM FIOP Physical Data—Unit 48JZ

THIS DATA APPLIES TO 48JZ UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 48JZ 024040 030040 030060 036060 036090 042060 042090

NOMINAL CAPACITY (ton) 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2

OPERATING WEIGHT (lb.) 310 324 324 321 321 380 380

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb.)

REFRIGERANT METERING DEVICE

Orifice Indoor (in.)

AccuRater™ Piston

REFRIGERANT METERING DEVICE

Orifice Outdoor (in.)

AccuRater™ Piston

OUTDOOR COIL

Rows...Fins/in.

Face Area (sq ft)

OUTDOOR FAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

INDOOR COIL

Rows...Fins/in.

Face Area (sq ft)

INDOOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor (HP)

FURNACE SECTION*

Burner Orifice No. (Qty...Drill Size)

Natural Gas

Burner Orifice No. (Qty...Drill Size)

Propane Gas

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-

PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

RETURN-AIR FILTERS (in.)

Throwaway

* Based on altitude of 0 to 2000 ft.

7.0 8.9 8.9 9.3 9.3 9.5 9.5

0.061 0.061 0.061 0.067 0.067 0.073 0.073

0.032 (2) 0.040 (2) 0.040 (2) 0.040 (2) 0.040 (2) 0.038 (2) 0.038 (2)

2...17

8.5

2350

22

1/8 (825)

3...15

3.7

800

10X10

1/2

2...44

2...50

20X20X1 20X20X1 20X20X1 20X24X1 20X24X1 24X30X1 24X30X1

2...17

10.3

2350

22

1/8 (825)

3...15

3.7

1000

10X10

1/2

2...44

2...50

2...17

10.3

2350

22

1/8 (825)

3...15

3.7

1000

10X10

1/2

2...38

2...46

Scroll

1

2...17

10.3

2500

22

1/4 (1100)

4...15

3.7

1200

11X10

3/4

2...38

2...46

610±15
420±25

20±5

45±10

2...17

10.3

2500

22

1/4 (1100)

4...15

3.7

1200

11X10

3/4

3...38

3...46

2...17

13.5

2350

22

1/8 (825)

3...15

4.7

1400

11X10

3/4

2...38

2...46

2...17

13.5

2350

22

1/8 (825)

3...15

4.7

1400

11X10

3/4

3...38

3...46

15

Table 5—ICM FIOP Physical Data—Unit 48JZ (Continued)

THIS DATA APPLIES TO 48JZ UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 48JZ 048090 048115 048130 060090 060115 060130

NOMINAL CAPACITY (ton) 444555

OPERATING WEIGHT (lb.) 409 409 409 504 504 504

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb.)

REFRIGERANT METERING DEVICE

Orifice Indoor (in.)

AccuRater™ Piston

REFRIGERANT METERING DEVICE

Orifice Outdoor (in.)

AccuRater™ Piston

OUTDOOR COIL

Rows...Fins/in.

Face Area (sq ft)

OUTDOOR FAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

INDOOR COIL

Rows...Fins/in.

Face Area (sq ft)

INDOOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor (HP)

FURNACE SECTION*

Burner Orifice No. (Qty...Drill Size)

Natural Gas

Burner Orifice No. (Qty...Drill Size)

Propane Gas

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

RETURN-AIR FILTERS (in.)

Throwaway

* Based on altitude of 0 to 2000 ft.

Scroll

1

10.6 10.6 10.6 12.4 12.4 12.4

.076 .076 .076 .088 .088 .088

0.046 (2) 0.046 (2) 0.046 (2) 0.052 (2) 0.052 (2) 0.052 (2)

2...17

13.5

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

3...38

3...46

24X30X1 24X30X1 24X30X1 24X30X1 24X30X1 24X30X1

2...17

13.5

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

3...33

3...42

2...17

13.5

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

3...31

3...41

1/4 (1100)

610±15
420±25

20±5

45±10

2...17

15.4

3300

22

4...15

5.7

1750

11X10

1.0

3...38

3...46

2...17

15.4

3300

22

1/4 (1100)

4...15

5.7

1750

11X10

1.0

3...33

3...42

2...17

15.4

3300

22

1/4 (1100)

4...15

5.7

1750

11X10

1.0

3...31

3...41

Table 6—48JZ with ICM FIOP Electrical Data

VOLTAGE

UNIT

SIZE 48JZ

024 208/230–1–60 187 253 13.5 61.0 0.9 4.3 22.1 30
030 208/230–1–60 187 253 15.9 73.0 0.9 4.3 25.1 35
036 208/230–1–60 187 253 16.9 83.0 1.6 6.8 29.5 40
042 208/230–1–60 187 253 22.4 105.0 0.9 6.8 35.7 50
048 208/230–1–60 187 253 21.3 109.0 1.6 6.8 35.0 50
060 208/230–1–60 187 253 27.6 158.0 1.6 9.2 45.3 60

V-PH-HZ

RANGE

MIN MAX RLA LRA FLA FLA MCA

COMPRESSOR

OUTDOOR FAN

MOTOR

INDOOR FAN

MOTOR

POWER SUPPLY

16

MAX FUSE

OR CKT. BKR.

Fig. 15—ICM FIOP Electric Schematic—Unit 48JZ

17

C01101

Table 7—ICM FIOP Physical Data—Unit 50GL

THIS DATA APPLIES TO 50GL UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 024 030 036 042 048 060

NOMINAL CAPACITY (ton) 2 2-1/2 3 3-1/2 4 5

OPERATING WEIGHT (lb) 270 291 299 321 326 399

COMPRESSOR Scroll

REFRIGERANT (R-410A)

Quantity (lb)

REFRIGERANT METERING DEVICE

Orifice ID (in.)

CONDENSER COIL

Rows...Fins/in.

Face Area (sq. ft.)

CONDENSER FAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

EVAPORATOR COIL

Rows...Fins/in.

Face Area (sq. ft.)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor (HP)

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

RETURN-AIR FILTERS (in.)

Throwaway

5.0 5.5 6.9 9.0 9.5 10.0

AccuRater™ Piston

.057 .057 .065 .070 .073 .086

1...17

10.9

2350

22

1/8 (825)

3...15

3.7

800

10x10

1/2

20X20X1 20X20X1 20X24X1 24X30X1 24X30X1 24X30X1

1...17

12.7

2350

22

1/8 (825)

3...15

3.7

1000

10x10

1/2

2...17

9.1

2350

22

1/8 (825)

3...15

3.7

1200

10x10

3/4

610±15
420±25

20±5

45±10

2...17

12.3

2350

22

1/8 (825)

3...15

4.7

1400

11x10

3/4

2...17

12.3

3300

22

1/4 (1100)

4...15

4.7

1600

11x10

3/4

2...17

16.4

3300

22

1/4 (1100)

4...15

4.7

2000

11x10

1

18

Table 8—50GL with ICM FIOP Electrical Data

VOLTAGE

UNIT

SIZE 50GL

024 208/230–1–60 187 253 13.5 61.0 0.9 4.3

030 208/230–1–60 187 253 14.7 73.0 0.9 4.3

036 208/230–1–60 187 253 15.4 83.0 0.9 6.8

042 208/230–1–60 187 253 18.6 105.0 0.9 6.8

048 208/230–1–60 187 253 20.5 109.0 1.6 6.8

060 208/230–1–60 187 253 27.6 158.0 1.6 9.1

* Heater capacity (kW) based on heater voltage of 208-v & 240-v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.
Refer to

Multiplication Factors

V-PH-HZ

RANGE

MIN MAX RLA LRA FLA FLA Nominal kW* FLA MCA

Table 23.

COMPRESSOR

OUTDOOR

FAN

MOTOR

INDOOR

FAN

MOTOR

ELECTRIC

-/-

3.8/5.0

5.4/7.2

7.5/10.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

HEAT

-/-

18.1/20.8

25.9/30.0

36.1/41.7

-/-

18.1/20.8

25.9/30.0

36.1/41.7

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

72.2/83.3

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

72.2/83.3

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

72.2/83.3

22.1/22.1

27.9/31.4

37.8/42.9

50.5/57.5

23.5/23.5

27.9/31.4

37.8/42.9

50.5/57.5

27.0/27.0

31.1/34.5

40.9/46.0

53.6/60.6

76.2/86.6

31.0/31.0

31.1/34.5

40.9/46.0

53.6/60.6

76.2/86.6

98.8/112.7

34.0/34.0

34.0/34.5

40.9/46.0

53.6/60.6

76.2/86.6

98.8/112.7

45.2/45.2

45.2/45.2

43.8/48.9

56.5/63.5

79.1/89.5

101.6/115.5

SINGLE POINT

POWER SUPPLY

MAX FUSE

OR CKT. BKR.

30/30
30/35
40/50
60/60

30/30
30/35
40/50
60/60

35/35
35/40
50/50

60/–

–

40/10
40/40
50/50

60/–

–
–

40/40
40/40
50/50

60/-

–
–

60/60
60/60
50/50

60/-

–
–

MOCP

–/70

80/90

–/70

90/90

100/125

–/70

90/90

100/125

–/70

90/90

110/125

–
–
–
–

–
–
–
–

–
–
–

–
–
–

–
–
–

–
–
–

19

Fig. 16—ICM FIOP Electrical Schematic—50GL

20

C01037

Table 9—ICM FIOP Physical Data—Unit 50JZ

THIS DATA APPLIES TO 50JZ UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 50JZ024 50JZ030 50JZ036 50JZ042 50JZ048 50JZ060

NOMINAL CAPACITY (ton) 2 2-1/2 3 3-1/2 4 5

OPERATING WEIGHT (lb.) 299 320 328 350 355 428

COMPRESSOR QUANTITY 1

TYPE SCROLL COMPRESSOR

REFRIGERANT R-410A

REFRIGERANT METERING DEVICE AccuRater™

Refrigerant (R-410A) Quantity (lb.) 7.0 8.9 9.3 9.5 10.6 12.4

ORIFICE ID (in.) 0.061 0.061 0.067 0.073 0.076 0.088

ORIFICE OD (in.) 0.032 (2) 0.040 (2) 0.040 (2) 0.038 (2) 0.046 (2) 0.052 (2)

OUTDOOR COIL

Rows... Fins/in.

face area (sq. ft.)

OUTDOOR FAN

Nominal Airflow (CFM)

Diameter

Motor HP (RPM)

INDOOR COIL

Rows... Fins/in.

face area (sq. ft.)

INDOOR BLOWER

Nominal Airflow (CFM)

Size (in.)

Motor (HP)

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

RETURN-AIR FILTERS (in.)

throwaway

2...17

8.5

2350

22

1/8 (825)

3...15

3.7

800

10X10

1/2

20X20X1 20X20X1 20X24X1 24X30X1 24X30X1 24X30X1

2...17

10.3

2350

22

1/8 (825)

3...15

3.7

1000

10X10

1/2

2...17

10.3

2800

22

1/4 (1100)

4...15

3.7

1200

10X10

3/4

610±15
420±25

20±5

45±10

2...17

13.5

2500

22

1/8 (825)

3...15

4.7

1400

11X10

3/4

2...17

13.5

3300

22

1/4 (1100)

4...15

4.7

1600

11X10

3/4

2...17

15.4

3300

22

1/4 (1100)

4...15

5.7

2000

11X10

1

21

Table 10—50JZ with ICM FIOP Electrical Data

VOLTAGE

UNIT

SIZE 50JZ

024 208/230–1–60 187 253 13.5 61.0 0.9 4.3

030 208/230–1–60 187 253 15.9 73.0 0.9 4.3

036 208/230–1–60 187 253 16.9 83.0 1.6 6.8

042 208/230–1–60 187 253 22.4 105.0 0.9 6.8

048 208/230–1–60 187 253 21.3 109.0 1.6 6.8

060 208/230–1–60 187 253 27.6 158.0 1.6 9.2

* Heater capacity (kW) based on heater voltage of 208-v & 240-v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

Multiplication Factors

Refer to

V-PH-HZ

RANGE

MIN MAX RLA LRA FLA FLA Nominal kW* FLA MCA

Table 23.

COMPRESSOR

OUTDOOR

FAN

MOTOR

INDOOR

FAN

MOTOR

ELECTRIC

-/-

3.8/5.0

5.4/7.2

7.5/10.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

HEAT

-/-

18.1/20.8

25.9/30.0

36.1/41.7

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

72.2/83.3

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

72.2/83.3

-/-

18.1/20.8

25.9/30.0

36.1/41.7

54.2/62.5

72.2/83.3

22.1/22.1

44.6/48.1

54.5/59.6

67.2/74.2

25.1/25.1

47.6/51.1

57.4/62.6

70.2/77.2

92.8/103.2

29.5/29.5

52.1/55.6

61.9/67.0

74.7/81.6

97.2/107.7

35.7/35.7

58.3/61.7

68.1/73.2

80.8/87.8

103.4/113.0

126.0/139.9

35.0/35.0

57.6/61.1

67.4/72.5

80.2/87.1

102.7/113.2

125.3/139.2

45.1/45.1

67.7/71.1

77.7/82.8

90.2/97.2

112.8/123.2

135.4/149.3

SINGLE POINT

POWER SUPPLY

MAX FUSE

OR CKT. BKR.

30/30
50/50

60/–

–

30/30
60/60

–
–
–

40/40
60/60

–
–
–

50/50

–
–
–
–
–

50/50

–
–
–
–
–

60/60

–
–
–
–
–

MOCP

–/70

70/80

70/70
80/80

100/110

70/80
80/90

100/110

70/70
80/80

90/90
110/125
150/150

70/70

80/80

90/90
110/125
150/150

80/80

90/90
100/110
125/125
150/150

–
–

–
–

–
–

–

–

–

22

Fig. 17—ICM FIOP Electrical Schematic—50JZ

23

c01036

UNIT
SIZE

024

COMFORT (48JZ Only)

030

COMFORT (48JZ Only)

036

COMFORT (48JZ Only)

† On 48JZ Only

UNIT
SIZE

042

048

060

† On 48JZ Only

Table 11–48GP & 48JZ Cooling (and Heat Pump Heating-48JZ only)

Dry Coil ICM Airflow

Small Cabinet

CFM ADJUST

PIN SELECT

EXTERNAL STATIC

PRESSURE RANGE

COOLING † 745 675 – 835 750 690 940 880 815

COOLING

DEHUMIDIFY

HEAT PUMP

COOLING † 940 860 785 1020 965 895 1185 1100 1010

COOLING

DEHUMIDIFY

HEAT PUMP

COOLING † 1025 935 – 1145 1085 1005 1320 1260 1180

COOLING

DEHUMIDIFY

HEAT PUMP

Heat Pump Efficiency

0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0

675 625 – 675 650 600 755 730 705

670 605 – 740 690 635 845 795 735

820 785 735 820 800 770 955 920 880

850 780 745 935 905 845 1055 1040 955

925 885 – 925 900 870 1060 1040 1010

955 880 – 1075 990 920 1220 1180 1125

and

Cooling

LO PIN NOM PIN HI PIN

pin selections deliver equal airflow

Table 12—48GP & 48JZ Cooling (and Heat Pump Heating-48JZ only)

Dry Coil ICM Airflow

Large Cabinet

CFM ADJUST

PIN SELECT

EXTERNAL STATIC

PRESSURE RANGE

COOLING † 1100 1225 1410

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT (48JZ Only)

COOLING † 1260 1400 1610

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT (48JZ Only)

COOLING † 1575 1750 2010

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT (48JZ Only)

Heat Pump Efficiency

and

Cooling

pin selections deliver equal airflow

LO PIN NOM PIN HI PIN

0.1–1.0 0.1–1.0 0.1–1.0

980 980 1125

990 1100 1265

1120 1120 1290

1135 1260 1450

1400 1400 1610

1415 1575 1810

24

EASY SELECT™

BOARD SETTING (CFM)

External

Unit

Size

024

030

036

Unit
Size

Static

Pressure

Gas Heat Size

040 –––855770710––––––
060 ––––––1020 890 835 – – –
040 –––880840805––––––
060 ––––––1030 970 910 – – –
060 ––––––1035 995 955 – – –
090 –––––––––1170 1110 1025

EASY SELECT™

BOARD SETTING (CFM)

042

048

060

Table 13—48GP & 48JZ Gas Heating ICM Airflow

Small Cabinet

700 800 1100 1250

0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0

Table 14—48GP & 48JZ Gas Heating ICM Airflow

Large Cabinet

1000 1250 1600 1750 1800

External

Static

Pressure

Gas Heat Size

060 1000 ––––
090 – 1250 – – –
090 – 1250 – – –
115 – – 1600 – –
130 – – – 1750 –
090 – 1250 – – –
115 – – 1600 – –
130 ––––1800

0.0–1.0 0.0–1.0 0.0–1.0 0.0–1.0 0.0–1.0

UNIT

48GP

&

48JZ

COOLING

SIZE

024

030

036

042

048

060

Table 15—48GP & 48JZ ICM Air Flow vs. Temperature Rise Chart

RATED GAS
INPUT RATE

(X 1000)

40 800 36.5 20 50 175
60

(48GP Only)

40 800 36.5 20 50 175
60 1100 40 35 65 165
60 1100 40 25 55 165
90 1200 54 45 75 175
60 1000 44 20 50 165
90 1250 53 35 65 170

90 1250 53 25 55 165
115 1600 53 35 65 170
130 1750 54 40 70 175

90 1600 41 25 55 155
115 1600 53 35 65 170
130 1800 53 40 70 175

AIRFLOW SETTING

EASY SELECT™

(SCFM)

1100 40 35 65 165

CALCULATED

TEMPERATURE

RISE

MIN.

TEMP

RISE

MAX

TEMP

RISE

MAX

DISCH.

TEMP

25

UNIT
SIZE

024

030

036

†

Heat Pump Efficiency

UNIT
SIZE

†

Heat Pump Efficiency

EXTERNAL STATIC

PRESSURE RANGE

COMFORT (50JZ Only)

COMFORT (50JZ Only)

COMFORT (50JZ Only)

042

048

060

Table 16—50GL/50JZ Cooling & Heating Dry Coil ICM Airflow

Small Cabinet

CFM ADJUST

PIN SELECT

0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0 0.0–0.4 0.4–0.7 0.7–1.0

COOLING † 800 725 – 885 805 730 990 930 855

COOLING

DEHUMIDIFY

HEAT PUMP

COOLING † 1010 920 825 1105 1030 930 1255 1160 1050

COOLING

DEHUMIDIFY

HEAT PUMP

COOLING † 1110 1025 970 1235 1175 1115 1400 1355 1280

COOLING

DEHUMIDIFY

HEAT PUMP

and

Cooling

pin selections deliver equal airflow

715 670 – 715 695 645 795 775 745

720 660 – 790 745 685 890 850 785

890 845 795 890 865 825 1010 980 925

945 850 765 1020 965 895 1140 1105 995

990 960 910 990 975 940 1125 1110 1085

1035 975 910 1160 1080 1020 1305 1275 1220

LO PIN NOM PIN HI PIN

Table 17—50GL/50JZ Cooling & Heating Dry Coil ICM Airflow

Large Cabinet

CFM ADJUST

PIN SELECT

EXTERNAL STATIC

PRESSURE RANGE

COOLING † 1100 1225 1410

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT (50JZ Only)

COOLING † 1260 1400 1610

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT (50JZ Only)

COOLING † 1575 1750 2010

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT (50JZ Only)

and

Cooling

pin selections deliver equal airflow

LO PIN NOM PIN HI PIN

0.1–1.0 0.1–1.0 0.1–1.0

980 980 1125

990 1100 1265

1120 1120 1290

1135 1260 1450

1400 1400 1610

1415 1575 1810

Table 18—Minimum Airflow for Reliable Electric Heater Operation (CFM)

UNIT

SIZE
50JZ 750 1025 1250 1285 1710 1800
50GL 750 750 1250 1205 1500 1800

024 030 036 042 048 060

26

→

Table 19—ELECTRIC HEAT PRESSURE DROP TABLE (in. wg)

Small Cabinet

STATIC

5kW 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07

7.5 kW 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09
10 kW 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11
15 kW 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18
20 kW 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600

CFM

Table 20— ELECTRIC HEAT PRESSURE DROP TABLE (in. wg)

Large Cabinet

STATIC

5kW 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12

7.5 kW 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
10 kW 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
15 kW 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15
20 kW 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16

1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500

CFM

Table 21—ICM FIOP WET COIL PRESSURE DROP (in. wg)

UNIT
SIZE

600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

024 0.005 0.007 0.010 0.012 0.015 –––––––––––
030 – 0.007 0.010 0.012 0.015 0.018 0.021 0.024 ––––––––
036 – – – 0.019 0.023 0.027 0.032 0.037 0.042 0.047 ––––––
042 ––––0.014 0.017 0.020 0.024 0.027 0.031 0.035 0.039 0.043 – – –
048 ––––––0.027 0.032 0.036 0.041 0.046 0.052 0.057 0.063 0.068 –
060 –––––––––0.029 0.032 0.036 0.040 0.045 0.049 0.053

STANDARD CFM (SCFM)

Table 22—FILTER PRESSURE DROP TABLE (in. wg)

FILTER SIZE

20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — — — — — — — — —
20X24X1 ————0.09 0.10 0.11 0.13 0.14 0.15 0.16 — — — — — — — —
24X30X1 ————— — —0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

CFM

Table 23—ELECTRIC HEATER MULTIPLICATION FACTORS

HEATER KW

RATING

240

Example:

15.0 kW (at 240-v.) heater on 208-v.
= 15.0 (.75 mult. factor)
= 11.25 capacity at 208-v.

VOLTAGE

DISTRIBUTION

200 .69
208 .75
230 .92
240 1.00

MULTIPLICATION

FACTOR

27

QUICK REFERENCE GUIDE

SET-UP INSTRUCTIONS FOR WARMER HEATING TEMPERATURES

AND SUPER HUMIDITY CONTROL IN COOLING

EASY SELECT BOARD

9 PIN CONNECTOR

ICM PRINTED CIRCUIT BOARD

SEC1 SEC2

EASY SELECT

AUX HEAT KW/CFM

0-30

0-20

1075

A

B

C

D

E

VIO

BLU

ORN

BLK

WHT

F

YEL

875

AC/HP SIZE

036 030 024 018

SYSTEM TYPE

AC

HP-COMFORT

AC/HP CFM ADJUST

NOM HI

ON/OFF DELAY

09030900

CONTINUOUS FAN

MED HI YELLO

HEATER/MOTOR

TM

0-10

0-5

725

625

HP-EFF

LO

ENH

0

12 PIN CONNECTOR

J2

J1

AUX1 HUM1

AUX2

24VAC

GRY

HUM2

D
R

W
W
Y
Y/ Y
G
O

C

H

1

2

1

2

1. Configuration Taps
(See Installation Instructions, for detailed description.)

A. AUX HEAT - Set for heater size (Ex: 0-10 for 10 kw)
B. AC/HP SIZE - Set for size of outdoor unit
C. SYSTEM TYPE - Select "HP COMFORT"
D. AC/HP CFM ADJUST - Select "LO"
E. ON/OFF DELAY - Select "ENH"
F. CONTINUOUS FAN - Select desired speed

2. Remove Jumper J1 to activate all dehumidify modes.

3. Complete wiring and install outdoor temperature sensor
according to Installation Instructions.

THERMIDISTAT™ CONTROL SETTINGS

1. Set "DIP Switches" - Set the dip switches (back of Thermidistat
Control Board) appropriately for specific system being installed.

2. Thermidistat Control Configurations
(See Thermidistat™ Control Installation Instructions for
detailed description.)

• Option 5 (Variable Speed Motors) - set to ON

• Option 7 (Super Dehumidify) - set to ON

• Option 12 (Heaters during Defrost) - setting "2" is
suggested for all heaters

• Option 16 - Heat pump systems set to ON for warmer heat
below 40° F.

• Option 17 - Select programmable or non-programmable mode.

3. Set desired humidity level on front of Thermidistat
(50 to 55% RH recommended). For dehumidification in
cooling, both "dhu" and "cool" must be displayed.

ICM QUICK REFERENCE GUIDE

Table 24—Troubleshooting Chart

SYSTEM CAUSE REMEDY

Blower wheel not secured to shaft Inspect and properly tighten blower wheel to shaft

IFM does not run

IFM operation is intermittent Connectors not firmly seated

Insufficient voltage at motor Determine cause and correct

Power connectors not properly seated Connectors should snap easily; do not force

c01034

Gently pull wires individually

to be sure they are inserted

into the connectors

28

START-UP CHECKLIST

(Remove and Store in Job File)

I. Preliminary Information

MODEL NO.:_________________________________
SERIAL NO.:__________________________________
DATE:_______________________________________
TECHNICIAN:_________________________________

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 HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
( ) CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)
( ) CHECK THAT INDOOR (EVAPORATOR) 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
( ) MAKE SURE THAT - ON 060 SIZE PURON HEATPUMP, ONLY-THE TWO WIRE TIES FASTEN TO THE
OUTDOOR COILS AND REVERSING VALVE/ACCUMULATOR HAVE BEEN REMOVED.

III. START-UP
ELECTRICAL

SUPPLY VOLTAGE __________________________________
COMPRESSOR AMPS_________________________________
INDOOR (EVAPORATOR) FAN AMPS___________

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE ___________DB
RETURN-AIR TEMPERATURE ___________DB ___________WB
COOLING SUPPLY AIR ___________DB ___________WB
HEAT PUMP SUPPLY AIR ___________
GAS HEAT SUPPLY AIR ___________
ELECTRIC HEAT SUPPLY AIR ___________

PRESSURES

GAS INLET PRESSURE ___________IN. WG
GAS MANIFOLD PRESSURE ___________IN. WG
REFRIGERANT SUCTION ___________PSIG SUCTION LINE TEMP*___________
REFRIGERANT DISCHARGE ___________PSIG DISCHARGE TEMP†___________
( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
GAS HEAT TEMPERATURE RISE
TEMPERATURE RISE (LITERATURE) RANGE___________
MEASURED TEMPERATURE RISE___________
*Measured at suction inlet to compressor
†Measured at liquid line leaving condenser.

EASY SELECT

Heat Settings

IV. EASY SELECT SETTINGS

FULL UNIT MODEL NUMBER:___________
ENTER AVAILABLE HEATSETTINGS
ENTER AVAILABLE AIRFLOW HEAT AIR PIN CONNECTION
SETTING___________
ENTER AVAILABLE SIZES SIZE PIN CONNECTION SETTING___________
TYPE PIN CONNECTION SETTING___________
ADJUST PIN CONNECTION SETTING___________
DELAY PIN CONNECTION SETTING___________
(0/0 or 0/90 for gas/electric models)
CONTINOUS FAN PIN CONNECTION SETTING___________

29

AC HP Size

System Type

AC HP-Comfort HP.Eff

AC/HP CFM Adjust

Norm Lo Hi

On/Off Delay

0

⁄90

30

⁄90

0

⁄0 ENH

Continous Fan

Lo Med Hi

c01999

Copyright 2001 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 4821si

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4
Tab 1a 1a

PC 101 Catalog No. 534-80085 Printed in U.S.A. Form 48–21SI Pg 30 10-01 Replaces: 48–20SI