Typical System Wiring Diagram - White Rodgers 50A55-143 User Manual

HOT
(LINE)
ELECTRONIC
AIR CLEANER
Low Voltage (24 VAC)
Line Voltage (120 VAC)
N. C. = Normally closed switch
N. O. = Normally open switch
4

TYPICAL SYSTEM WIRING DIAGRAM

TH
HUMIDIFIER
50A55-143
IN OTHER
FURNACES
TWINNING
APPLICATIONS
ONLY
TWIN*
FLAME
SENSOR
PROBE
LEGEND
120 VAC
24 VAC CLASS II
TRANSFORMER
24 VAC TR
50A55
COOL
HEAT
PARK
PARK
LINE
XFMR
EAC
INDUCER
HUM
IND
IGN
IGNITOR
CIR N
LINE N
XFMR N
HUM N
EAC N
Y Y
W W
G G
R R
THERMOSTAT
C
TWIN*
PRESSURE SWITCH (N. O.)
PS
HLI
HLO
HIGH LIMIT
FP
(N. C.)
RO1
ROLLOUT
GND
(N. C.)
RO2
MV
MV
TR
TH
NEUTRAL
(LINE)
CIRCULATOR
BLOWER
COMPRESSOR
CONTACTOR
AUX. HIGH
LIMIT (N. C.)
GAS
VALVE