Specifications

4
WIRING DIAGRAM
C
R
G
W
Y
Y
W
G
R
THERMOSTAT
COMPRESSOR
CONTACTOR
OPTIONAL
24 V HUM
Optional
ELECTRONIC
AIR CLEANER
120 V
CIRCULATOR
BLOWER
50M56
24 VAC
120 VAC
24 VAC CLASS II
TRANSFORMER
HOT
(LINE)
NEUTRAL
(LINE)
FS
FLAME
SENSOR
PROBE
TH TR
TYPICAL SYSTEM WIRING DIAGRAM
Optional
HUMIDIFIER
120 V
Low Voltage (24 VAC)
Line Voltage (120 VAC)
LEGEND
N. C. = Normally closed switch
N. O. = Normally open switch
Twinning: The control board in this kit CANNOT
be twinned with any of the Carrier circuit boards.
*Use Line Neutral terminal when replacing new style control.
[4-Pin Connector]
[12-Pin Connector]
GAS
VALVE
HIGH LIMIT
(N. C.)
AUX. HIGH
LIMIT (N. C.)
PRESSURE SWITCH
(N. O.)
MV LO
HLO
PSO
TH
TR
Not Used
GND
HLI
PSI
MV COM
Not Used
Not Used
IGNITOR
INDUCER
IGN
IGN-N*
IND
IND-N*
LINE N
XFMR N
EAC N
HUM N
CIR N
PARK
EAC - H
HUM - H
XFMR - H
LINE - H
PARK
HI HEAT
LO HEAT
COOL
12-Pin Connector
HLO
PSO
5
11
12
HLI
PSI
GND
TH
TR
MV
LO
MV
COM
4-Pin Connector
IND
IGN
IND
N
IGN
N