Carrier 48JZ N 024 060 User Manual

48GP (N) 024-060, 48JZ (N) 024-060  
50GL 024-060, 50JZ 024-060  
ICM FIOP Installation Instructions  
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  
C99088  
50GL: Start-Up (ICM FIOP)..................................................11  
50JZ: Start-Up (ICM FIOP)...................................................11  
Fig. 1—Puron® Unit (48GP Shown)  
ELECTRICAL DATA & SCHEMATICS—ICM FIOP.............12  
Physical Data & Electrical Schematics..................................12  
Improper installation, adjustment, alteration, service, mainte-  
nance, 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.  
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.  
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, CAU-  
TION, 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.  
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.  
The power supply (volts, phase, and hertz) must correspond to that  
specified on unit rating plate.  
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.  
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.  
Follow all safety codes. Wear safety glasses and work gloves. Use  
quenching cloth for unbrazing operations. Have fire extinguisher  
available for all brazing operations.  
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.  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book  
Tab 1a 1a  
1
4
PC 101  
Catalog No. 534-80085  
Printed in U.S.A.  
Form 48–21SI  
Pg 1  
10-01  
Replaces: 48–20SI  
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  
HIGH VOLTAGE  
POWER LEADS  
(SEE UNIT WIRING  
LABEL)  
POWER  
SUPPLY  
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.  
FIELD-SUPPLIED  
FUSED DISCONNECT  
c. SYSTEM TYPE—SELECT SYSTEM TYPE INSTALLED  
GND  
CONTROL BOX  
Factory selected on 48GP for AC-Air conditioner.  
For Gas Heat/Electric Cool Unit–AC must be selected.  
BLK(DH)  
DHUM  
YEL(Y)  
d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW, OR  
HIGH AIRFLOW  
Y
THERMOSTAT  
(TYPICAL)  
GRN(G)  
G
R
C
LOW-VOLTAGE  
POWER LEADS  
(SEE UNIT  
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 indi-  
vidual installation needs for such things as noise, comfort, and  
humidity removal (See Fig. 8, D as indicated).  
RED(R)  
BRN(C)  
WHI(W1)  
WIRING LABEL)  
W1  
W2  
GRA(W2)  
SPLICE BOX  
LEGEND  
Field Control-Voltage Wiring  
Field High-Voltage Wiring  
e. ON/OFF DELAY—SELECT DESIRED  
TIME DELAY PROFILE  
C01027  
Four motor operation delay profiles are provided to customize  
and enhance system operation (See Fig. 8, E as indicated).  
Selection options are:  
Fig. 4—50GL High- and Control-Voltage  
Connections  
(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.  
HIGH VOLTAGE  
POWER LEADS  
POWER  
SUPPLY  
(SEE UNIT WIRING  
LABEL)  
(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.  
FIELD-SUPPLIED  
GND  
(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.  
FUSED DISCONNECT  
CONTROL BOX  
BLK(DH)  
DHUM  
YEL(Y)  
Y
THERMOSTAT  
(TYPICAL)  
(4.) Not recommended for 48GP  
GRN(G)  
G
R
C
LOW-VOLTAGE  
POWER LEADS  
(SEE UNIT  
f. CONTINUOUS FAN—SELECT DESIRED FAN SPEED  
WHEN THERMOSTAT IS SET ON CONTINUOUS FAN  
RED(R)  
BRN(C)  
WHI(W1)  
WIRING LABEL)  
(1.) LO speed—Factory setting, 50 percent cooling mode  
airflow.  
W1  
W2  
O
GRA(W2)  
ORN(0)  
(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).  
SPLICE BOX  
LEGEND  
Field Control-Voltage Wiring  
Field High-Voltage Wiring  
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.  
C01028  
Fig. 5—50JZ High- and Control-Voltage  
Connections  
h. BASIC UNIT CONFIGURATION  
The ICM motor uses the selected taps to modify its operation to a  
pre-programmed table of airflows.  
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 perfor-  
mance is required, or if system enhancements such as super  
dehumidify are not needed.  
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).  
(1.) HEAT-Factory selected to match heat input size.  
3
(2.) AC/HP Size-Factory selected to match system size, please  
verify.  
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.  
(3.) SYSTEM TYPE-Factory selected on 48GP system AC-  
AIR CONDITIONER.  
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 Thermidis-  
tat™ 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).  
(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 (Super-  
Dehumidify does not require an outdoor temperature sensor).  
The following configuration is recommended for maximum  
cooling/dehumidifying comfort. This configuration will im-  
prove the comfort provided by the air conditioning system if  
more humidity removal is desired. While providing this im-  
proved 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.  
HUMIDISTAT  
HUM 1  
(C)  
24-VAC  
TO HUMIDIFIER  
HUM 2  
(G)  
HUMIDIFIER WIRING  
A95317  
Fig. 6—Humidifier Wiring-48GP  
EASY SELECT  
BOARD TERMINAL  
BLOCK  
The following system configuration is recommended for maxi-  
mum cooling/dehumidifying comfort (See Fig. 8).  
D
H
J1  
HUMIDISTAT  
(1.) HEAT-Factory selected to match gas heat size of unit  
installed.  
R
REMOVE  
JUMPER  
(2.) AC/HP Size-Factory selected to match system size, please  
verify.  
A95316  
(3.) SYSTEM TYPE-Factory selected on 48GP system AC-  
AIR CONDITIONER.  
Fig. 7—Humidistat Wiring for  
De-Humidify Mode-48GP  
(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060).  
(5.) ON/OFF DELAY-Select ENH profile.  
d. DEHUMIDIFY CAPABILITY WITH STANDARD  
HUMIDISTAT CONNECTION  
(6.) CONTINUOUS FAN-Select desired fan speed when ther-  
mostat is set to continuous fan.  
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).  
(7.) DEHUMIDIFY MODE-Remove J1 jumper to activate.  
NOTE: J1 jumper should only be removed when a Thermidis-  
tat™, 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  
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.  
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.  
48GP SEQUENCE OF OPERATION  
a. CONTINUOUS FAN  
b. ELECTRONIC AIR CLEANER CONNECTIONS  
The AUX1 and AUX2 terminals are not always energized  
during blower operations, as described above. When using an  
(1.) Thermostat closes circuit R to G—The Blower runs at  
continuous fan airflow  
4
b. COOLING MODE  
9 PIN CONNECTOR  
ICM PRINTED CIRCUIT BOARD  
(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.  
SEC1  
SEC2  
J1  
EASY SELECTTM  
c. COOLING MODE-DEHUMIDIFICATION  
GAS HEAT/CFM  
090  
1250  
060  
040  
800  
N/A  
1100  
(1.) If indoor temperature is above temperature set point and  
humidity is above humidity set point, thermostat or Ther-  
midistat™ 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.  
A
B
VIO  
AC/HP SIZE  
036  
AC  
030  
024  
018  
BLU  
SYSTEM TYPE  
HP-COMFORT  
HP-EFF  
DH  
R
C
D
ORN  
W1  
W2  
AC/HP CFM ADJUST  
NOM  
LO  
HI  
d. COOLING MODE-SUPER DEHUMIDIFY OPERATION  
(SEE QUICK REFERENCE GUIDE)  
Y
1
BLK  
Y/ Y  
2
ON/OFF DELAY  
G
O
C
J2  
0
90  
30  
90  
0
0
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 instruc-  
tions. Consult indoor control literature to determine if control is  
capable of providing Super Dehumidify inputs and for configura-  
tion instruction.  
ENH  
E
F
WHT  
YEL  
CONTINUOUS FAN  
MED HI  
AUX1  
HUM1  
LO  
YEL  
AUX2  
24VAC  
GRY  
HUM2  
(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 Dehu-  
midify mode, the motor delivers reduced airflow to maxi-  
mize the humidity removal of the system while minimizing  
over cooling.  
HEATER/MOTOR  
12 PIN CONNECTOR  
C01039  
Fig. 8—Detail of SPP Printed-Circuit Board  
mately 350 CFM/ton cooling airflow for good humidity re-  
moval  
2. HP-EFF (factory selected) Provides equal airflow for heating  
and cooling modes to increase overall heat pump efficiency.  
Provides approximately 400 CFM/ton.  
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.  
d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW, OR  
HIGH AIRFLOW  
EASY SELECT™—48JZ  
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 indi-  
vidual installation needs for such things as noise, comfort, and  
humidity removal (See Fig. 8, D as indicated).  
NOTE: Either the Carrier Thermidistat™ or Dual Fuel ther-  
mostat 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).  
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.  
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  
(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 conjunc-  
tion with the airflow in cooling or heat pump heating  
mode.  
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-  
(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.  
(8.) CONFIGURE THERMIDISTAT™-Follow Thermidis-  
tat™ installation instructions for Super Dehumidify opera-  
tion.  
ACCESSORY INSTALLATION  
a. AUXILIARY TERMINALS  
f. CONTINUOUS FAN—SELECT DESIRED FAN SPEED  
WHEN THERMOSTAT IS SET ON CONTINUOUS FAN  
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.  
(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).  
b. ELECTRONIC AIR CLEANER CONNECTIONS  
g. LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE  
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.  
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.  
c. HUMIDIFIER / THERMIDISTAT™ CONNECTIONS  
h. BASIC UNIT CONFIGURATION  
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 Thermidis-  
tat™ Control the 24-v. signal may be sourced directly from the  
Thermidistat™ HUM terminal (See Fig. 8, 9 & 10).  
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 perfor-  
mance 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.  
THERMIDISTAT ™  
(4.) AC/HP CFM ADJUST-Select HIGH for 042 & 048, NOM  
for 036 & 060, and LO for 024 & 030.  
HUM 1  
(C)  
24-VAC  
TO HUMIDIFIER  
(5.) ON/OFF DELAY-Factory selected 0/90 profile.  
HUM 2  
(G)  
(6.) CONTINUOUS FAN-Select desired fan speed when ther-  
mostat is set to continuous fan.  
HUMIDIFIER WIRING  
C01108  
i. COMFORT OPTIONS—SUPER DEHUMIDIFY (See Quick  
Reference Guide)  
Fig. 9—Humidifier Wiring-48JZ  
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 im-  
prove the comfort provided by the air conditioning system if  
more humidity removal is desired. While providing this im-  
proved comfort, the system will operate efficiently, but not at  
the published ARI SEER efficiency.  
EASY SELECT  
BOARD TERMINAL  
BLOCK  
DH  
J1  
THERMIDISTAT  
R
JUMPER  
The following system configuration is recommended for maxi-  
mum cooling/dehumidifying comfort (See Fig. 8).  
(1.) HEAT-Factory selected to match gas heat size of unit  
installed.  
C01109  
Fig. 10—Thermidistat™ Wiring for  
De-Humidify Mode-48JZ  
(2.) AC/HP Size-Factory selected to match system size, please  
verify.  
d. DEHUMIDIFY CAPABILITY WITH STANDARD  
THERMIDISTAT™ CONNECTION  
(3.) SYSTEM TYPE-Factory selected on 48JZ system for  
HP-EFF.  
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 Thermidis-  
tat™. 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  
(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.  
6
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.  
NOTE: The Thermidistat™ is capable of providing Super Com-  
fort Heat operation mode and must be configured as outlined in its  
installation instructions. The system must be installed with appro-  
priate outdoor temperature sensor. Consult Thermidistat™ litera-  
ture for configuration instructions. Consult sensor instructions for  
sensor installation details.  
e. DEHUMIDIFY AND SUPER DEHUMIDIFY  
CAPABILITIES  
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.  
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.  
EASY SELECT™—50GL & 50JZ  
48JZ SEQUENCE OF OPERATION  
a. CONTINUOUS FAN  
9 PIN CONNECTOR  
(1.) Thermostat closes circuit R to G—The Blower runs at  
continuous fan airflow  
ICM PRINTED CIRCUIT BOARD  
SEC1  
SEC2  
J1  
b. COOLING MODE  
EASY SELECTTM  
(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.  
AUX HEAT KW/CFM  
0-30  
0-20  
875  
0-10  
725  
0-5  
625  
1075  
A
B
VIO  
AC/HP SIZE  
036  
AC  
030  
024  
018  
c. COOLING MODE-DEHUMIDIFICATION  
BLU  
(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 Thermidis-  
tat™ 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.  
SYSTEM TYPE  
HP-COMFORT  
DH  
R
HP-EFF  
C
D
ORN  
W1  
W2  
AC/HP CFM ADJUST  
NOM  
LO  
HI  
Y
1
BLK  
Y/ Y  
2
ON/OFF DELAY  
G
O
C
J2  
0
90  
30  
90  
0
0
ENH  
E
F
d. COOLING MODE-SUPER DEHUMIDIFY OPERATION  
(SEE QUICK REFERENCE GUIDE)  
WHT  
YEL  
CONTINUOUS FAN  
MED HI  
AUX1  
HUM1  
LO  
YEL  
NOTE: Thermidistat™ is capable of providing Super Dehu-  
midify operation mode and must be configured as outlined in its  
installation instructions. Consult indoor control literature to deter-  
mine if control is capable of providing Super Dehumidify inputs  
and for configuration instruction.  
AUX2  
24VAC  
GRY  
HUM2  
HEATER/MOTOR  
(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.  
12 PIN CONNECTOR  
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.  
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.  
a. AUX HEAT kW/CFM—SELECT HEATER RANGE FOR  
SIZE OF ELECTRIC HEATER INSTALLED  
f. HEAT PUMP HEATING MODE  
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  
(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  
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).  
(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.  
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).  
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 perfor-  
mance is required, or if system enhancements such as super  
dehumidify are not needed.  
c. SYSTEM TYPE—SELECT SYSTEM TYPE INSTALLED  
The type of system will be factory selected (see below for  
details):  
(1.) AUX HEAT kW/CFM-Select the heater range for the size  
of electric heater installed (skip this step if no heater is  
installed).  
(1.) AC-Air conditioner (Factory Selected for 50GL)  
(2.) AC/HP SIZE-Factory selected to match system size in-  
stalled, please verify.  
(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.) SYSTEM TYPE-Factory selected AC (50GL) or HP-EFF  
(50JZ).  
(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.  
(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.  
d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW, OR  
HIGH AIRFLOW  
i. COMFORT OPTIONS—SUPER DEHUMIDIFY (See Quick  
Reference Guide)  
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 indi-  
vidual installation needs for such things as noise, comfort, and  
humidity removal (See Fig. 11, D as indicated).  
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 im-  
prove the comfort provided by the air conditioning system if  
more humidity removal is desired. While providing this im-  
proved comfort, the system will operate efficiently, but not at  
the published HSPF or ARI SEER efficiency.  
e. ON/OFF DELAY—SELECT DESIRED  
TIME DELAY PROFILE  
The following system configuration is recommended for maxi-  
mum heating and cooling/dehumidifying comfort (See Fig. 11).  
Four motor operation delay profiles are provided to customize  
and enhance system operation (See Fig. 11, E as indicated).  
Selection options are:  
(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).  
(1.) The standard 90 sec off delay (Factory Setting) at 100  
percent airflow in cooling or heat pump heating mode.  
(2.) AC/HP Size-Factory selected to match system size in-  
stalled, please verify.  
(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 conjunc-  
tion with the airflow in cooling or heat pump heating  
mode.  
(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.  
(3.) A no delay option used for servicing unit or when a  
thermostat is utilized to perform delay functions.  
(6.) CONTINUOUS FAN-Select desired fan speed when ther-  
mostat is set to continuous fan.  
(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.  
(7.) DEHUMIDIFY MODE-Remove J1 jumper to activate.  
(8.) LOW VOLTAGE CONNECTIONS-Make connections as  
shown in ELECTRICAL CONNECTIONS section.  
This will minimize cold blow in heat pump operation  
(50JZ only) and could enhance system efficiency.  
(9.) CONFIGURE THERMIDISTAT™ (or capable zoning  
system)-Following its installation instructions for Super  
Dehumidify and Super Comfort Heat operation.  
f. CONTINUOUS FAN—SELECT DESIRED FAN SPEED  
WHEN THERMOSTAT IS SET ON CONTINUOUS FAN  
8
This configuration provides the following comfort enhance-  
ments:  
EASY SELECT  
BOARD TERMINAL  
BLOCK  
(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.  
D
H
J1  
HUMIDISTAT  
R
REMOVE  
JUMPER  
(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 con-  
densed moisture after cooling/dehumidifying opera-  
tion.  
A95316  
Fig. 13—Humidistat Wiring for De-Humidify Mode-  
for 50GL & 50JZ  
(c.) Lower airflow while the compressor is running to  
reduce draft effects and increase heating air tempera-  
ture and improved humidity control during cooling  
operation.  
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).  
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  
f. DEHUMIDIFY AND SUPER DEHUMIDIFY CAPABILITIES  
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.  
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  
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.  
(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.  
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 Thermi-  
distat™ HUM terminal.  
c. COOLING MODE-DEHUMIDIFICATION  
(1.) If indoor temperature is above temperature set point and  
humidity is above humidity set point, thermostat or Ther-  
midistat™ 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.  
HUMIDISTAT  
d. COOLING MODE-SUPER DEHUMIDIFY OPERATION (see  
quick reference guide)  
HUM 1  
(C)  
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 instruc-  
tions. Consult indoor control literature to determine if control is  
capable of providing Super Dehumidify inputs and for configura-  
tion instruction.  
24-VAC  
TO HUMIDIFIER  
HUM 2  
(G)  
HUMIDIFIER WIRING  
A95317  
Fig. 12—Humidifier Wiring for 50GL & 50JZ  
(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  
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  
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.  
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:  
e. ELECTRIC HEATING MODE  
(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.)  
(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.  
(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 evapo-  
rator fan will continue to run for the time setting selected  
on Easy Select™ board. (See Easy Select Section.)  
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.  
(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 tempera-  
ture control is set to “call for heating” (above room  
temperature) and operates in cooling mode when tempera-  
ture control is set to “call for cooling” (below room  
temperature).  
h. HEATING MODE—SUPER COMFORT HEAT OPERA-  
TION  
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.  
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 instruc-  
tions. 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.  
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.  
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.  
(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.  
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 tempera-  
tures 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  
(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.  
IMPORTANT: When evaluating the refrigerant charge, an indi-  
cated 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-  
10  
(2.) COOLING MODE—  
perature. Observe that compressor, condenser fan, and  
evaporator blower motors start. Observe that cooling cycle  
shuts down when control setting is satisfied. The evapo-  
rator fan will continue to run for the selected off delay.  
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.) When using an auto-changeover room thermostat, place  
both SYSTEM and FAN switches in AUTO positions.  
Observe that unit operates in heating mode when tempera-  
ture control is set to ‘‘call for heating’’ (above room  
temperature) and operates in cooling mode when tempera-  
ture control is set to ‘‘call for cooling’’ (below room  
temperature).  
(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 compres-  
sor, 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.  
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 ther-  
mostat 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.  
(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.  
Step 4—50JZ: Start-Up (ICM FIOP)  
CHECKING COOLING AND HEATING CONTROL OPERA-  
TION– 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.  
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”.  
(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 ter-  
minal 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).  
(5.) AUTOMATIC CHANGE-OVER—  
To test AUTO CHANGE-OVER function between COOL  
and HEAT:  
Enable the AUTO CHANGE-OVER mode during Thermi-  
distat™ 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 tempera-  
ture).  
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 ter-  
minal 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).  
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.  
(3.) Place system switch or MODE control in HEAT position.  
Set control above room temperature. Observe that com-  
pressor, 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.  
Step 3—50GL: Start-Up (ICM FIOP)  
(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).  
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-  
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  
NOMINAL CAPACITY (ton)  
OPERATING WEIGHT (lb.)  
024040  
2
024060  
2
030040  
2-1/2  
313  
030060  
2-1/2  
313  
036060  
3
036090  
3
042060  
3-1/2  
382  
042090  
3-1/2  
382  
290  
290  
321  
321  
COMPRESSORS  
Quantity  
Scroll  
1
REFRIGERANT (R-410A)  
Quantity (lb.)  
5.0  
5.0  
5.5  
5.5  
6.9  
6.9  
9.0  
9.0  
REFRIGERANT METERING DEVICE  
Orifice ID (in.)  
.057  
.057  
.057  
.057  
.065  
.065  
.070  
.070  
AccuRater™ Piston  
CONDENSER COIL  
Rows...Fins/in.  
Face Area (sq ft)  
1...17  
10.9  
1...17  
10.9  
1...17  
12.7  
1...17  
12.7  
2...17  
9.1  
2...17  
9.1  
2...17  
12.3  
2...17  
12.3  
CONDENSER FAN  
Nominal Cfm  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
Diameter (in.)  
Motor HP (Rpm)  
EVAPORATOR COIL  
Rows...Fins/in.  
Face Area (sq ft)  
3...15  
3.7  
3...15  
3.7  
3...15  
3.7  
3...15  
3.7  
3...15  
3.7  
3...15  
3.7  
3...15  
4.7  
3...15  
4.7  
EVAPORATOR BLOWER  
Nominal Airflow (Cfm)  
Size (in.)  
800  
10 X 10  
1/2  
800  
10 X 10  
1/2  
1000  
10 X 10  
1/2  
1000  
10 X 10  
1/2  
1200  
11 X 10  
3/4  
1200  
11 X 10  
3/4  
1400  
11 X 10  
3/4  
1400  
11 X 10  
3/4  
Motor (HP)  
FURNACE SECTION*  
Burner Orifice No. (Qty...Drill Size)  
Natural Gas  
Burner Orifice No. (Qty...Drill Size)  
Propane Gas  
2...44  
2...50  
2...38  
2...46  
2...44  
2...50  
2...38  
2...46  
2...38  
2...46  
3...38  
3...46  
2...38  
2...46  
3...38  
3...46  
HIGH-PRESSURE SWITCH (psig)  
Cutout  
610 15  
420 25  
Reset (Auto)  
LOSS-OF-CHARGE/LOW-  
PRESSURE SWITCH  
(Liquid Line) (psig)  
Cutout  
20  
45 10  
5
Reset (Auto)  
RETURN-AIR FILTERS (in.)  
Throwaway  
20 X 20 X 1 20 X 20 X 1 20 X 20 X 1 20 X 20 X 1 20 X 24 X 1 20 X 24 X 1 24 X 30 X 1 24 X 30 X 1  
* Based on altitude of 0 to 2000 ft.  
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 con-  
denser 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.  
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 disconnect-  
ing the electrical power. Failure to adhere to this warning  
could cause serious injury or death.  
ELECTRICAL DATA & SCHEMATICS—ICM FIOP  
Step 1—Physical Data & Electrical Schematics  
To clean the blower motor and wheel:  
1. 1. Remove and disassemble blower assembly as follows:  
a. Remove unit access panel.  
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  
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.  
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.  
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.  
CARE AND MAINTENANCE  
Indoor Blower and Motor  
NOTE: All motors are pre-lubricated. Do not attempt to lubricate  
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  
NOMINAL CAPACITY (ton)  
OPERATING WEIGHT (lb.)  
048090  
4
048115  
4
048130  
4
060090  
5
060115  
5
060130  
5
421  
421  
421  
468  
468  
468  
COMPRESSORS  
Quantity  
Scroll  
1
REFRIGERANT (R-410A)  
Quantity (lb.)  
9.5  
9.5  
9.5  
10.0  
.086  
10.0  
.086  
10.0  
.086  
REFRIGERANT METERING DEVICE  
Orifice ID (in.)  
.073  
.073  
.073  
AccuRater™ Piston  
CONDENSER COIL  
Rows...Fins/in.  
Face Area (sq ft)  
2...17  
12.3  
2...17  
12.3  
2...17  
12.3  
2...17  
16.4  
2...17  
16.4  
2...17  
16.4  
CONDENSER FAN  
Nominal Cfm  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
Diameter (in.)  
Motor Hp (Rpm)  
EVAPORATOR COIL  
Rows...Fins/in.  
Face Area (sq ft)  
4...15  
4.7  
4...15  
4.7  
4...15  
4.7  
4...15  
4.7  
4...15  
4.7  
4...15  
4.7  
EVAPORATOR BLOWER  
Nominal Airflow (Cfm)  
Size (in.)  
1600  
11 X 10  
3/4  
1600  
11 X 10  
3/4  
1600  
11 X 10  
3/4  
2000  
11 X 10  
1.0  
2000  
11 X 10  
1.0  
2000  
11 X 10  
1.0  
Motor (HP)  
FURNACE SECTION*  
Burner Orifice No. (Qty...Drill Size)  
Natural Gas  
Burner Orifice No. (Qty...Drill Size)  
Propane Gas  
3...38  
3...46  
3...33  
3...42  
3...31  
3...41  
3...38  
3...46  
3...33  
3...42  
3...31  
3...41  
HIGH-PRESSURE SWITCH (psig)  
Cutout  
610 15  
420 25  
Reset (Auto)  
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH  
(Liquid Line) (psig)  
Cutout  
20  
45 10  
5
Reset (Auto)  
RETURN-AIR FILTERS (in.)  
Throwaway  
24 X 30 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1  
* Based on altitude of 0 to 2000 ft.  
Table 3—48GP with ICM FIOP Electrical Data  
VOLTAGE  
RANGE  
OUTDOOR FAN  
MOTOR  
INDOOR FAN  
COMPRESSOR  
POWER SUPPLY  
MOTOR  
UNIT  
SIZE 48GP  
V-PH-HZ  
MAX FUSE  
MIN  
MAX  
RLA  
LRA  
FLA  
FLA  
MCA  
OR CKT. BKR.  
024  
030  
036  
042  
048  
060  
208/230–1–60  
208/230–1–60  
208/230–1–60  
208/230–1–60  
208/230–1–60  
208/230–1–60  
187  
187  
187  
187  
187  
187  
253  
253  
253  
253  
253  
253  
13.5  
14.7  
15.4  
18.6  
20.5  
27.6  
61.0  
73.0  
0.9  
0.9  
0.9  
0.9  
1.6  
1.6  
4.3  
4.3  
6.8  
6.8  
6.8  
9.2  
22.1  
23.6  
27.0  
31.0  
34.0  
45.2  
30  
30  
35  
40  
40  
60  
83.0  
105.0  
109.0  
158.0  
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.  
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.  
2. Remove and clean blower wheel as follows:  
f. Pivot blower access panel back into place. Adjust wire  
assemblies so that wiring follows proper pathways.  
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.  
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.  
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 attach-  
ment. Remove grease and oil with mild solvent.  
TROUBLESHOOTING  
START-UP CHECKLIST  
13  
C01035  
Fig. 14—ICM FIOP Electric Schematic—Unit 48GP  
14  
Table 4—ICM FIOP Physical Data—Unit 48JZ  
THIS DATA APPLIES TO 48JZ UNITS WITH THE ICM INDOOR MOTOR FIOP  
UNIT SIZE 48JZ  
NOMINAL CAPACITY (ton)  
OPERATING WEIGHT (lb.)  
024040  
2
030040  
2-1/2  
324  
030060  
2-1/2  
324  
036060  
3
036090  
3
042060  
3-1/2  
380  
042090  
3-1/2  
380  
310  
321  
321  
COMPRESSORS  
Quantity  
Scroll  
1
REFRIGERANT (R-410A)  
Quantity (lb.)  
7.0  
8.9  
8.9  
9.3  
9.3  
9.5  
9.5  
REFRIGERANT METERING DEVICE  
Orifice Indoor (in.)  
0.061  
0.061  
0.061  
0.067  
0.067  
0.073  
0.073  
AccuRater™ Piston  
REFRIGERANT METERING DEVICE  
Orifice Outdoor (in.)  
0.032 (2)  
0.040 (2)  
0.040 (2)  
0.040 (2)  
0.040 (2)  
0.038 (2)  
0.038 (2)  
AccuRater™ Piston  
OUTDOOR COIL  
Rows...Fins/in.  
Face Area (sq ft)  
2...17  
8.5  
2...17  
10.3  
2...17  
10.3  
2...17  
10.3  
2...17  
10.3  
2...17  
13.5  
2...17  
13.5  
OUTDOOR FAN  
Nominal Cfm  
Diameter (in.)  
Motor Hp (Rpm)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2500  
22  
1/4 (1100)  
2500  
22  
1/4 (1100)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
INDOOR COIL  
Rows...Fins/in.  
Face Area (sq ft)  
3...15  
3.7  
3...15  
3.7  
3...15  
3.7  
4...15  
3.7  
4...15  
3.7  
3...15  
4.7  
3...15  
4.7  
INDOOR BLOWER  
Nominal Airflow (Cfm)  
Size (in.)  
800  
10 X 10  
1/2  
1000  
10 X 10  
1/2  
1000  
10 X 10  
1/2  
1200  
11 X 10  
3/4  
1200  
11 X 10  
3/4  
1400  
11 X 10  
3/4  
1400  
11 X 10  
3/4  
Motor (HP)  
FURNACE SECTION*  
Burner Orifice No. (Qty...Drill Size)  
Natural Gas  
Burner Orifice No. (Qty...Drill Size)  
Propane Gas  
2...44  
2...50  
2...44  
2...50  
2...38  
2...46  
2...38  
2...46  
3...38  
3...46  
2...38  
2...46  
3...38  
3...46  
HIGH-PRESSURE SWITCH (psig)  
Cutout  
610 15  
420 25  
Reset (Auto)  
LOSS-OF-CHARGE/LOW-  
PRESSURE SWITCH  
(Liquid Line) (psig)  
Cutout  
20  
45 10  
5
Reset (Auto)  
RETURN-AIR FILTERS (in.)  
Throwaway  
20 X 20 X 1 20 X 20 X 1 20 X 20 X 1 20 X 24 X 1 20 X 24 X 1 24 X 30 X 1 24 X 30 X 1  
* Based on altitude of 0 to 2000 ft.  
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  
NOMINAL CAPACITY (ton)  
OPERATING WEIGHT (lb.)  
048090  
4
048115  
4
048130  
4
060090  
5
060115  
5
060130  
5
409  
409  
409  
504  
504  
504  
COMPRESSORS  
Quantity  
Scroll  
1
REFRIGERANT (R-410A)  
Quantity (lb.)  
10.6  
.076  
10.6  
.076  
10.6  
.076  
12.4  
.088  
12.4  
.088  
12.4  
.088  
REFRIGERANT METERING DEVICE  
Orifice Indoor (in.)  
AccuRater™ Piston  
REFRIGERANT METERING DEVICE  
Orifice Outdoor (in.)  
0.046 (2)  
0.046 (2)  
0.046 (2)  
0.052 (2)  
0.052 (2)  
0.052 (2)  
AccuRater™ Piston  
OUTDOOR COIL  
Rows...Fins/in.  
Face Area (sq ft)  
2...17  
13.5  
2...17  
13.5  
2...17  
13.5  
2...17  
15.4  
2...17  
15.4  
2...17  
15.4  
OUTDOOR FAN  
Nominal Cfm  
Diameter (in.)  
Motor Hp (Rpm)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
INDOOR COIL  
Rows...Fins/in.  
Face Area (sq ft)  
4...15  
4.7  
4...15  
4.7  
4...15  
4.7  
4...15  
5.7  
4...15  
5.7  
4...15  
5.7  
INDOOR BLOWER  
Nominal Airflow (Cfm)  
Size (in.)  
1600  
11 X 10  
3/4  
1600  
11 X 10  
3/4  
1600  
11 X 10  
3/4  
1750  
11 X 10  
1.0  
1750  
11 X 10  
1.0  
1750  
11 X 10  
1.0  
Motor (HP)  
FURNACE SECTION*  
Burner Orifice No. (Qty...Drill Size)  
Natural Gas  
Burner Orifice No. (Qty...Drill Size)  
Propane Gas  
3...38  
3...46  
3...33  
3...42  
3...31  
3...41  
3...38  
3...46  
3...33  
3...42  
3...31  
3...41  
HIGH-PRESSURE SWITCH (psig)  
Cutout  
610 15  
420 25  
Reset (Auto)  
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH  
(Liquid Line) (psig)  
Cutout  
20  
45 10  
5
Reset (Auto)  
RETURN-AIR FILTERS (in.)  
Throwaway  
24 X 30 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1  
* Based on altitude of 0 to 2000 ft.  
Table 6—48JZ with ICM FIOP Electrical Data  
VOLTAGE  
RANGE  
OUTDOOR FAN  
MOTOR  
INDOOR FAN  
COMPRESSOR  
POWER SUPPLY  
MOTOR  
UNIT  
SIZE 48JZ  
V-PH-HZ  
MAX FUSE  
MIN  
MAX  
RLA  
LRA  
FLA  
FLA  
MCA  
OR CKT. BKR.  
024  
030  
036  
042  
048  
060  
208/230–1–60  
208/230–1–60  
208/230–1–60  
208/230–1–60  
208/230–1–60  
208/230–1–60  
187  
187  
187  
187  
187  
187  
253  
253  
253  
253  
253  
253  
13.5  
15.9  
16.9  
22.4  
21.3  
27.6  
61.0  
73.0  
0.9  
0.9  
1.6  
0.9  
1.6  
1.6  
4.3  
4.3  
6.8  
6.8  
6.8  
9.2  
22.1  
25.1  
29.5  
35.7  
35.0  
45.3  
30  
35  
40  
50  
50  
60  
83.0  
105.0  
109.0  
158.0  
16  
C01101  
Fig. 15—ICM FIOP Electric Schematic—Unit 48JZ  
17  
Table 7—ICM FIOP Physical Data—Unit 50GL  
THIS DATA APPLIES TO 50GL UNITS WITH THE ICM INDOOR MOTOR FIOP  
UNIT SIZE  
024  
2
030  
2-1/2  
291  
036  
3
042  
3-1/2  
321  
048  
4
060  
5
NOMINAL CAPACITY (ton)  
OPERATING WEIGHT (lb)  
COMPRESSOR  
270  
299  
326  
399  
Scroll  
REFRIGERANT (R-410A)  
Quantity (lb)  
5.0  
5.5  
6.9  
9.0  
9.5  
10.0  
.086  
AccuRater™ Piston  
REFRIGERANT METERING DEVICE  
Orifice ID (in.)  
.057  
.057  
.065  
.070  
.073  
CONDENSER COIL  
Rows...Fins/in.  
Face Area (sq. ft.)  
1...17  
10.9  
1...17  
12.7  
2...17  
9.1  
2...17  
12.3  
2...17  
12.3  
2...17  
16.4  
CONDENSER FAN  
Nominal Cfm  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
Diameter (in.)  
Motor Hp (Rpm)  
EVAPORATOR COIL  
Rows...Fins/in.  
Face Area (sq. ft.)  
3...15  
3.7  
3...15  
3.7  
3...15  
3.7  
3...15  
4.7  
4...15  
4.7  
4...15  
4.7  
EVAPORATOR BLOWER  
Nominal Airflow (Cfm)  
Size (in.)  
800  
10x10  
1/2  
1000  
10x10  
1/2  
1200  
10x10  
3/4  
1400  
11x10  
3/4  
1600  
11x10  
3/4  
2000  
11x10  
1
Motor (HP)  
HIGH-PRESSURE SWITCH (psig)  
Cutout  
610 15  
420 25  
Reset (Auto)  
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH  
(Liquid Line) (psig)  
Cutout  
20  
45 10  
5
Reset (Auto)  
RETURN-AIR FILTERS (in.)  
Throwaway  
20 X 20 X 1 20 X 20 X 1 20 X 24 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1  
18  
Table 8—50GL with ICM FIOP Electrical Data  
OUTDOOR INDOOR  
ELECTRIC  
VOLTAGE  
RANGE  
SINGLE POINT  
POWER SUPPLY  
COMPRESSOR  
FAN  
FAN  
HEAT  
UNIT  
SIZE 50GL  
MOTOR  
MOTOR  
V-PH-HZ  
MAX FUSE  
OR CKT. BKR.  
MIN MAX RLA  
LRA  
61.0  
FLA  
0.9  
FLA  
4.3  
Nominal kW*  
FLA  
-/-  
MCA  
MOCP  
-/-  
22.1/22.1  
30/30  
30/35  
40/50  
60/60  
3.8/5.0  
5.4/7.2  
7.5/10.0  
18.1/20.8 27.9/31.4  
25.9/30.0 37.8/42.9  
36.1/41.7 50.5/57.5  
024  
030  
208/230–1–60 187 253  
208/230–1–60 187 253  
13.5  
14.7  
-/-  
-/-  
23.5/23.5  
30/30  
30/35  
40/50  
60/60  
3.8/5.0  
5.4/7.2  
7.5/10.0  
18.1/20.8 27.9/31.4  
25.9/30.0 37.8/42.9  
36.1/41.7 50.5/57.5  
73.0  
83.0  
0.9  
0.9  
4.3  
6.8  
-/-  
-/-  
27.0/27.0  
35/35  
35/40  
50/50  
60/–  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
18.1/20.8 31.1/34.5  
25.9/30.0 40.9/46.0  
36.1/41.7 53.6/60.6  
54.2/62.5 76.2/86.6  
036  
042  
208/230–1–60 187 253  
208/230–1–60 187 253  
15.4  
18.6  
–/70  
80/90  
-/-  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
15.0/20.0  
-/-  
31.0/31.0  
40/10  
40/40  
50/50  
60/–  
18.1/20.8 31.1/34.5  
25.9/30.0 40.9/46.0  
36.1/41.7 53.6/60.6  
54.2/62.5 76.2/86.6  
105.0  
109.0  
158.0  
0.9  
1.6  
1.6  
6.8  
6.8  
9.1  
–/70  
90/90  
100/125  
72.2/83.3 98.8/112.7  
-/-  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
15.0/20.0  
-/- 34.0/34.0  
40/40  
40/40  
50/50  
60/-  
18.1/20.8 34.0/34.5  
25.9/30.0 40.9/46.0  
36.1/41.7 53.6/60.6  
54.2/62.5 76.2/86.6  
72.2/83.3 98.8/112.7  
048  
060  
208/230–1–60 187 253  
208/230–1–60 187 253  
20.5  
27.6  
–/70  
90/90  
100/125  
-/-  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
15.0/20.0  
-/-  
45.2/45.2  
60/60  
60/60  
50/50  
60/-  
18.1/20.8 45.2/45.2  
25.9/30.0 43.8/48.9  
36.1/41.7 56.5/63.5  
54.2/62.5 79.1/89.5  
72.2/83.3 101.6/115.5  
–/70  
90/90  
110/125  
* 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 FactorsTable 23.  
19  
C01037  
Fig. 16—ICM FIOP Electrical Schematic—50GL  
20  
Table 9—ICM FIOP Physical Data—Unit 50JZ  
THIS DATA APPLIES TO 50JZ UNITS WITH THE ICM INDOOR MOTOR FIOP  
UNIT SIZE  
NOMINAL CAPACITY (ton)  
OPERATING WEIGHT (lb.)  
COMPRESSOR QUANTITY  
TYPE  
50JZ024  
50JZ030  
2-1/2  
50JZ036  
50JZ042  
3-1/2  
50JZ048  
50JZ060  
2
3
4
5
299  
320  
328  
350  
355  
428  
1
SCROLL COMPRESSOR  
R-410A  
REFRIGERANT  
REFRIGERANT METERING DEVICE  
Refrigerant (R-410A) Quantity (lb.)  
ORIFICE ID (in.)  
AccuRater™  
7.0  
8.9  
9.3  
9.5  
10.6  
0.076  
12.4  
0.088  
0.061  
0.061  
0.067  
0.073  
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.)  
2...17  
8.5  
2...17  
10.3  
2...17  
10.3  
2...17  
13.5  
2...17  
13.5  
2...17  
15.4  
OUTDOOR FAN  
Nominal Airflow (CFM)  
Diameter  
2350  
22  
1/8 (825)  
2350  
22  
1/8 (825)  
2800  
22  
1/4 (1100)  
2500  
22  
1/8 (825)  
3300  
22  
1/4 (1100)  
3300  
22  
1/4 (1100)  
Motor HP (RPM)  
INDOOR COIL  
Rows... Fins/in.  
face area (sq. ft.)  
3...15  
3.7  
3...15  
3.7  
4...15  
3.7  
3...15  
4.7  
4...15  
4.7  
4...15  
5.7  
INDOOR BLOWER  
Nominal Airflow (CFM)  
Size (in.)  
800  
10 X 10  
1/2  
1000  
10 X 10  
1/2  
1200  
10 X 10  
3/4  
1400  
11 X 10  
3/4  
1600  
11 X 10  
3/4  
2000  
11 X 10  
1
Motor (HP)  
HIGH-PRESSURE SWITCH (psig)  
Cutout  
610 15  
420 25  
Reset (Auto)  
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH  
(Liquid Line) (psig)  
Cutout  
20  
45 10  
5
Reset (Auto)  
RETURN-AIR FILTERS (in.)  
throwaway  
20 X 20 X 1 20 X 20 X 1 20 X 24 X 1 24 X 30 X 1 24 X 30 X 1 24 X 30 X 1  
21  
Table 10—50JZ with ICM FIOP Electrical Data  
OUTDOOR INDOOR  
ELECTRIC  
VOLTAGE  
RANGE  
SINGLE POINT  
POWER SUPPLY  
COMPRESSOR  
FAN  
FAN  
HEAT  
UNIT  
SIZE 50JZ  
MOTOR  
MOTOR  
V-PH-HZ  
MAX FUSE  
OR CKT. BKR.  
MIN MAX RLA  
LRA  
61.0  
FLA  
0.9  
FLA  
4.3  
Nominal kW*  
FLA  
-/-  
MCA  
MOCP  
-/-  
22.1/22.1  
30/30  
50/50  
60/–  
3.8/5.0  
5.4/7.2  
7.5/10.0  
18.1/20.8 44.6/48.1  
25.9/30.0 54.5/59.6  
36.1/41.7 67.2/74.2  
024  
030  
208/230–1–60 187 253  
208/230–1–60 187 253  
13.5  
15.9  
–/70  
70/80  
-/-  
-/-  
25.1/25.1  
30/30  
60/60  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
18.1/20.8 47.6/51.1  
25.9/30.0 57.4/62.6  
36.1/41.7 70.2/77.2  
73.0  
83.0  
0.9  
1.6  
4.3  
6.8  
70/70  
80/80  
100/110  
54.2/62.5 92.8/103.2  
-/-  
-/- 29.5/29.5  
40/40  
60/60  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
18.1/20.8 52.1/55.6  
25.9/30.0 61.9/67.0  
36.1/41.7 74.7/81.6  
54.2/62.5 97.2/107.7  
036  
042  
208/230–1–60 187 253  
208/230–1–60 187 253  
16.9  
22.4  
70/80  
80/90  
100/110  
-/-  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
15.0/20.0  
-/-  
35.7/35.7  
50/50  
18.1/20.8 58.3/61.7  
25.9/30.0 68.1/73.2  
36.1/41.7 80.8/87.8  
54.2/62.5 103.4/113.0  
72.2/83.3 126.0/139.9  
70/70  
80/80  
90/90  
110/125  
150/150  
105.0  
109.0  
158.0  
0.9  
1.6  
1.6  
6.8  
6.8  
9.2  
-/-  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
15.0/20.0  
-/-  
35.0/35.0  
50/50  
18.1/20.8 57.6/61.1  
25.9/30.0 67.4/72.5  
36.1/41.7 80.2/87.1  
54.2/62.5 102.7/113.2  
72.2/83.3 125.3/139.2  
70/70  
80/80  
90/90  
110/125  
150/150  
048  
060  
208/230–1–60 187 253  
208/230–1–60 187 253  
21.3  
27.6  
-/-  
3.8/5.0  
5.4/7.2  
7.5/10.0  
11.3/15.0  
15.0/20.0  
-/-  
45.1/45.1  
60/60  
18.1/20.8 67.7/71.1  
25.9/30.0 77.7/82.8  
36.1/41.7 90.2/97.2  
54.2/62.5 112.8/123.2  
72.2/83.3 135.4/149.3  
80/80  
90/90  
100/110  
125/125  
150/150  
* 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 FactorsTable 23.  
22  
c01036  
Fig. 17—ICM FIOP Electrical Schematic—50JZ  
23  
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  
LO PIN  
NOM PIN  
HI PIN  
UNIT  
SIZE  
0.0–0.4  
745  
0.4–0.7  
675  
0.7–1.0  
0.0–0.4  
835  
0.4–0.7  
750  
0.7–1.0  
690  
0.0–0.4  
940  
0.4–0.7  
880  
0.7–1.0  
815  
COOLING †  
COOLING  
DEHUMIDIFY  
675  
625  
675  
650  
600  
755  
730  
705  
024  
030  
036  
HEAT PUMP  
COMFORT (48JZ Only)  
670  
940  
820  
605  
860  
785  
740  
1020  
820  
690  
965  
800  
635  
895  
770  
845  
1185  
955  
795  
1100  
920  
735  
1010  
880  
COOLING †  
785  
735  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (48JZ Only)  
850  
1025  
925  
780  
935  
885  
745  
935  
1145  
925  
905  
1085  
900  
845  
1005  
870  
1055  
1320  
1060  
1040  
1260  
1040  
955  
1180  
1010  
COOLING †  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (48JZ Only)  
955  
880  
1075  
990  
920  
1220  
1180  
1125  
† On 48JZ Only Heat Pump Efficiency and Cooling 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  
LO PIN  
NOM PIN  
HI PIN  
UNIT  
SIZE  
EXTERNAL STATIC  
PRESSURE RANGE  
0.1–1.0  
1100  
980  
0.1–1.0  
1225  
980  
0.1–1.0  
1410  
COOLING †  
COOLING  
DEHUMIDIFY  
1125  
042  
048  
060  
HEAT PUMP  
COMFORT (48JZ Only)  
990  
1260  
1120  
1100  
1400  
1120  
1265  
1610  
1290  
COOLING †  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (48JZ Only)  
1135  
1575  
1400  
1260  
1750  
1400  
1450  
2010  
1610  
COOLING †  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (48JZ Only)  
1415  
1575  
1810  
† On 48JZ Only Heat Pump Efficiency and Cooling pin selections deliver equal airflow  
24  
Table 13—48GP & 48JZ Gas Heating ICM Airflow  
Small Cabinet  
EASY SELECT™  
BOARD SETTING (CFM)  
700  
800  
1100  
1250  
External  
Static  
Pressure  
Unit  
Size  
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  
Gas Heat Size  
040  
060  
040  
060  
060  
090  
855  
770  
710  
890  
835  
024  
030  
036  
1020  
880  
840  
805  
1030  
1035  
970  
995  
910  
955  
1170  
1110  
1025  
Table 14—48GP & 48JZ Gas Heating ICM Airflow  
Large Cabinet  
EASY SELECT™  
BOARD SETTING (CFM)  
1000  
1250  
1600  
1750  
1800  
External  
Static  
Pressure  
Unit  
Size  
0.0–1.0  
0.0–1.0  
0.0–1.0  
0.0–1.0  
0.0–1.0  
Gas Heat Size  
060  
090  
090  
115  
130  
090  
115  
130  
1000  
1250  
1250  
042  
048  
1600  
1750  
1250  
060  
1600  
1800  
Table 15—48GP & 48JZ ICM Air Flow vs. Temperature Rise Chart  
RATED GAS  
INPUT RATE  
(X 1000)  
AIRFLOW SETTING  
EASY SELECT™  
(SCFM)  
CALCULATED  
TEMPERATURE  
RISE  
MIN.  
TEMP  
RISE  
MAX  
TEMP  
RISE  
MAX  
DISCH.  
TEMP  
COOLING  
SIZE  
UNIT  
40  
800  
36.5  
20  
50  
175  
024  
60  
1100  
40  
35  
65  
165  
(48GP Only)  
40  
60  
800  
36.5  
40  
40  
54  
44  
53  
53  
53  
54  
41  
53  
53  
20  
35  
25  
45  
20  
35  
25  
35  
40  
25  
35  
40  
50  
65  
55  
75  
50  
65  
55  
65  
70  
55  
65  
70  
175  
165  
165  
175  
165  
170  
165  
170  
175  
155  
170  
175  
030  
036  
042  
1100  
1100  
1200  
1000  
1250  
1250  
1600  
1750  
1600  
1600  
1800  
60  
90  
48GP  
&
48JZ  
60  
90  
90  
048  
060  
115  
130  
90  
115  
130  
25  
Table 16—50GL/50JZ Cooling & Heating Dry Coil ICM Airflow  
Small Cabinet  
CFM ADJUST  
PIN SELECT  
EXTERNAL STATIC  
PRESSURE RANGE  
LO PIN  
NOM PIN  
HI PIN  
UNIT  
SIZE  
0.0–0.4  
800  
0.4–0.7  
725  
0.7–1.0  
0.0–0.4  
885  
0.4–0.7  
805  
0.7–1.0  
730  
0.0–0.4  
990  
0.4–0.7  
930  
0.7–1.0  
855  
COOLING †  
COOLING  
DEHUMIDIFY  
715  
670  
715  
695  
645  
795  
775  
745  
024  
030  
036  
HEAT PUMP  
COMFORT (50JZ Only)  
720  
1010  
890  
660  
920  
845  
790  
1105  
890  
745  
1030  
865  
685  
930  
825  
890  
1255  
1010  
850  
1160  
980  
785  
1050  
925  
COOLING †  
825  
795  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (50JZ Only)  
945  
1110  
990  
850  
1025  
960  
765  
970  
910  
1020  
1235  
990  
965  
1175  
975  
895  
1115  
940  
1140  
1400  
1125  
1105  
1355  
1110  
995  
1280  
1085  
COOLING †  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (50JZ Only)  
1035  
975  
910  
1160  
1080  
1020  
1305  
1275  
1220  
Heat Pump Efficiency and Cooling pin selections deliver equal airflow  
Table 17—50GL/50JZ Cooling & Heating Dry Coil ICM Airflow  
Large Cabinet  
CFM ADJUST  
PIN SELECT  
EXTERNAL STATIC  
PRESSURE RANGE  
LO PIN  
NOM PIN  
HI PIN  
UNIT  
SIZE  
0.1–1.0  
1100  
980  
0.1–1.0  
1225  
980  
0.1–1.0  
1410  
COOLING †  
COOLING  
DEHUMIDIFY  
1125  
042  
048  
060  
HEAT PUMP  
COMFORT (50JZ Only)  
990  
1260  
1120  
1100  
1400  
1120  
1265  
1610  
1290  
COOLING †  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (50JZ Only)  
1135  
1575  
1400  
1260  
1750  
1400  
1450  
2010  
1610  
COOLING †  
COOLING  
DEHUMIDIFY  
HEAT PUMP  
COMFORT (50JZ Only)  
1415  
1575  
1810  
Heat Pump Efficiency and Cooling pin selections deliver equal airflow  
Table 18—Minimum Airflow for Reliable Electric Heater Operation (CFM)  
UNIT  
SIZE  
024  
030  
036  
042  
048  
060  
50JZ  
50GL  
750  
750  
1025  
750  
1250  
1250  
1285  
1205  
1710  
1500  
1800  
1800  
26  
Table 19—ELECTRIC HEAT PRESSURE DROP TABLE (in. wg)  
Small Cabinet  
CFM  
STATIC  
500  
0.00  
0.00  
0.00  
0.00  
0.00  
600  
0.00  
0.00  
0.00  
0.00  
0.00  
700  
0.00  
0.00  
0.00  
0.00  
0.02  
800  
0.00  
0.00  
0.00  
0.02  
0.04  
900  
0.00  
0.00  
0.00  
0.04  
0.06  
1000  
0.00  
0.00  
0.02  
0.06  
0.08  
1100  
0.00  
0.02  
0.04  
0.08  
0.09  
1200  
0.00  
0.03  
0.06  
0.10  
0.11  
1300  
0.02  
0.05  
0.07  
0.12  
0.13  
1400  
0.04  
0.07  
0.09  
0.14  
0.15  
1500  
0.06  
0.08  
0.10  
0.16  
0.17  
1600  
0.07  
0.09  
0.11  
0.18  
0.19  
5 kW  
7.5 kW  
10 kW  
15 kW  
20 kW  
Table 20— ELECTRIC HEAT PRESSURE DROP TABLE (in. wg)  
Large Cabinet  
CFM  
STATIC  
1100  
0.00  
0.00  
0.00  
0.00  
0.02  
1200  
0.00  
0.00  
0.00  
0.02  
0.03  
1300  
0.00  
0.01  
0.01  
0.03  
0.04  
1400  
0.01  
0.02  
0.02  
0.04  
0.05  
1500  
0.02  
0.03  
0.03  
0.05  
0.06  
1600  
0.03  
0.04  
0.04  
0.06  
0.07  
1700  
0.04  
0.05  
0.05  
0.07  
0.08  
1800  
0.05  
0.06  
0.06  
0.08  
0.09  
1900  
0.06  
0.07  
0.07  
0.09  
0.10  
2000  
0.07  
0.08  
0.08  
0.10  
0.11  
2100  
0.08  
0.09  
0.09  
0.11  
0.12  
2200  
0.09  
0.10  
0.10  
0.12  
0.13  
2300  
2400  
2500  
0.12  
0.13  
0.13  
0.15  
0.16  
5 kW  
7.5 kW  
10 kW  
15 kW  
20 kW  
0.10  
0.11  
0.11  
0.13  
0.14  
0.11  
0.12  
0.12  
0.14  
0.15  
Table 21—ICM FIOP WET COIL PRESSURE DROP (in. wg)  
STANDARD CFM (SCFM)  
UNIT  
SIZE  
600  
700  
800  
900  
1000  
1100  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
024  
030  
036  
042  
048  
060  
0.005 0.007 0.010 0.012 0.015  
0.007 0.010 0.012 0.015 0.018 0.021 0.024  
0.019 0.023 0.027 0.032 0.037 0.042 0.047  
0.014 0.017 0.020 0.024 0.027 0.031 0.035 0.039 0.043  
0.027 0.032 0.036 0.041 0.046 0.052 0.057 0.063 0.068  
0.029 0.032 0.036 0.040 0.045 0.049 0.053  
Table 22—FILTER PRESSURE DROP TABLE (in. wg)  
CFM  
FILTER SIZE  
20 X 20 X 1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15  
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300  
20 X 24 X 1  
24 X 30 X 1  
0.09 0.10 0.11 0.13 0.14 0.15 0.16  
0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18  
Table 23—ELECTRIC HEATER MULTIPLICATION FACTORS  
HEATER KW  
RATING  
VOLTAGE  
DISTRIBUTION  
MULTIPLICATION  
FACTOR  
200  
208  
230  
240  
.69  
.75  
240  
.92  
1.00  
Example:  
15.0 kW (at 240-v.) heater on 208-v.  
= 15.0 (.75 mult. factor)  
= 11.25 capacity at 208-v.  
27  
QUICK REFERENCE GUIDE  
SET-UP INSTRUCTIONS FOR WARMER HEATING TEMPERATURES  
AND SUPER HUMIDITY CONTROL IN COOLING  
EASY SELECT BOARD  
1. Configuration Taps  
9 PIN CONNECTOR  
(See Installation Instructions, for detailed description.)  
ICM PRINTED CIRCUIT BOARD  
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  
SEC1  
SEC2  
J1  
EASY SELECTTM  
AUX HEAT KW/CFM  
0-30  
1075  
0-20  
875  
0-10  
725  
0-5  
625  
A
B
2. Remove Jumper J1 to activate all dehumidify modes.  
3. Complete wiring and install outdoor temperature sensor  
according to Installation Instructions.  
VIO  
AC/HP SIZE  
036  
AC  
030  
024  
018  
BLU  
SYSTEM TYPE  
HP-COMFORT  
DH  
R
HP-EFF  
C
D
ORN  
THERMIDISTAT™ CONTROL SETTINGS  
W1  
W2  
AC/HP CFM ADJUST  
NOM  
LO  
HI  
Y
1
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.)  
BLK  
Y/ Y  
2
ON/OFF DELAY  
G
O
C
J2  
0
90  
30  
90  
0
0
ENH  
E
F
WHT  
YEL  
CONTINUOUS FAN  
MED HI  
• 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.  
AUX1  
HUM1  
LO  
YEL  
AUX2  
24VAC  
GRY  
HUM2  
HEATER/MOTOR  
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.  
12 PIN CONNECTOR  
c01034  
ICM QUICK REFERENCE GUIDE  
Table 24—Troubleshooting Chart  
SYSTEM  
CAUSE  
REMEDY  
Blower wheel not secured to shaft  
Insufficient voltage at motor  
Inspect and properly tighten blower wheel to shaft  
Determine cause and correct  
IFM does not run  
Power connectors not properly seated  
Connectors should snap easily; do not force  
Gently pull wires individually  
to be sure they are inserted  
into the connectors  
IFM operation is intermittent  
Connectors not firmly seated  
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___________  
EASY SELECT  
Heat Settings  
*Measured at suction inlet to compressor  
†Measured at liquid line leaving condenser.  
IV. EASY SELECT SETTINGS  
AC HP Size  
System Type  
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)  
AC HP-Comfort HP.Eff  
AC/HP CFM Adjust  
Norm  
Lo  
Hi  
On/Off Delay  
0
30  
0
CONTINOUS FAN PIN CONNECTION SETTING___________  
90  
90  
0
ENH  
Hi  
Continous Fan  
Med  
Lo  
29  
c01999  
Copyright 2001 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book  
Replaces: 48–20SI  
4821si  
1
4
PC 101  
Catalog No. 534-80085  
Printed in U.S.A.  
Form 48–21SI  
Pg 30  
10-01  
Tab 1a 1a  

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