18-GE20D1-1E-EN
25
Electrical Connections
Make wiring connections to the unit as indicated on enclosed wiring diagram. This modular blower shall be connected into a permanently live
electric circuit. It is recommended that modular blower be provided with a separate "circuit protection device" electric circuit. The modular
blower must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code, ANSI/NFPA
70, if an external electrical source is utilized. The integrated modular blower control is polarity sensitive. The hot leg of the 120V power
supply must be connected to the black power lead as indicated on the wiring diagram.
Refer to the SERVICE FACTS literature and unit wiring diagram attached to modular blower.
Field Wiring
O
BK
BK
Y2
Y1 Y1
B/C B/C
W2
W1W1
GG
RR
O
Y1
B/C
Two Stage
Thermostat
Modular Blower
Integrated Modular Blower Control
Outdoor Unit
(No Transformer)
SEE
NOTE 2
BK JUMPER
SEE NOTE 1
Y2
W2
Y2
Disabled.
Applying 24VAC to
W1 or W2 will
create error
FIELD WIRING DIAGRAM FOR SINGLE OR TWO STAGE
THERMOSTAT, SINGLE OR TWO STAGE COOLING
NOTES:
1) For PWM (BK) enabled thermostats, cut the BK jumper
on the Integrated Modular Blower Control (IMBC) and
connect wiring.
2) The factory Y1-O jumper must remain in place for proper
LED read out in cooling mode.
3) Y1 and Y2 wiring from the thermostat must connect to
the IMBC for proper airflow and LED readout.
4) Single compressor and two compressor airflow is auto-
matically set with the IMBC Menu optionsin ODU section.
2-1=2 stage / 1 compressor (1st stage airflow = 80%)
2-2=2 stage / 2 compressors (1st stage airflow = 50%)
INTER-COMPONENT WIRING
24 V FIELD WIRING
24 V FACTORY WIRING
O
BK
BK
Y2
Y1 Y1
B/C B/C
W2W2
W1W1
GG
RR
O
Y1
Two Stage
Thermostat
Outdoor Unit
(No Transformer)
SEE
NOTE 2
O
R
X2
Y2
NOTES:
1) For PWM (BK) enabled thermostats, cut the BK jumper
on the IMBC and connect wiring.
2) Remove the factory Y1-O jumper for HP systems
for proper LED read out.
3) Y1 and Y2 wiring from the thermostat must connect to Y1 and
Y2 of the IMBC for proper airflow and LED readout.
4) Single compressor and two compressor airflow is automatically
set with the IMBC Menu options in ODU section.
2-1=2 stage / 1 compressor (1st stage airflow = 80%)
2-2=2 stage / 2 compressors (1st stage airflow = 50%)
INTER-COMPONENT WIRING
24 V FIELD WIRING
24 V FACTORY WIRING
R-BK
JUMPER
SEE NOTE 1
FIELD WIRING DIAGRAM FOR SINGLE OR TWO
STAGE THERMOSTAT, SINGLE OR TWO STAGE HEAT PUMP
Integrated Modular Blower Control
Y2
B/C
Modular Blower
Disabled.
Applying 24VAC to W1 or
W2 will create error
GGeenneerraall IInnssttaallllaattiioonn
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