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WIRING
AND CONFIGURATION 50M56U-843
TH
TR
MV HI
MV COM
MV LO
GND
HLO
HLI
PSO
PSI
C
R
G
W
Y
IGNITOR
Y
W
G
R
THERMOSTAT
2 STAGE
GAS
VALVE
HIGH LIMIT
(N. C.)
ROLLOUT
(N. C.)
AUX. HIGH
LIMIT (N. C.)
PRESSURE SWITCH (N. O.)
COMPRESSOR
CONTACTOR
ELECTRONIC
AIR CLEANER
INDUCER
CIRCULATOR
BLOWER
50M56
24 VAC
120 VAC
24 VAC CLASS II
TRANSFORMER
HOT
(LINE)
NEUTRAL
(LINE)
FS
FLAME
SENSOR
PROBE
TH TR
R/O OUT
R/O IN
TYPICAL SYSTEM WIRING DIAGRAM
HUMIDIFIER
Low Voltage (24 VAC)
Line Voltage (120 VAC)
LEGEND
N. C. = Normally closed switch
N. O. = Normally open switch
1 STAGE
GAS
VALVE
For Goodman 50M56-289 Application
IGN
IGN-N
IND
IND-N
LINE N
XFMR N
EAC N
HUM N
CIR N
PARK
EAC
HUM
XFMR
LINE
PARK
HI HEAT
LO HEAT
COOL
50M56U-843 TYPICAL WIRING DIAGRAM
190
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