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
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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
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(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
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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
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(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
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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
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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
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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
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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
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(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.)
(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).
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-
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
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.
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
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C01035
Fig. 14—ICM FIOP Electric Schematic—Unit 48GP
14
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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
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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
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C01101
Fig. 15—ICM FIOP Electric Schematic—Unit 48JZ
17
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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
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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
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C01037
Fig. 16—ICM FIOP Electrical Schematic—50GL
20
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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
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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
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c01036
Fig. 17—ICM FIOP Electrical Schematic—50JZ
23
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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
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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
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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
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→
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
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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
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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
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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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