White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control Wiring diagram
TH
TR
MV
MV
GND
FP
HLO
HLI
PS
C
R
G
W
Y
EAC N
HUM N
XFMR N
LINE N
CIR N
IGN
IND
IGN N
IND N
HUM
EAC
XFMR
LINE
PARK
PARK
HEAT
COOL
IGNITOR
Y
W
G
R
THERMOSTAT
GAS
VALVE
HIGH LIMIT
(N. C.)
ROLLOUT
(N. C.)
AUX. HIGH
LIMIT (N. C.)
PRESSURE SWITCH (N. O.)
FLAME
SENSOR
PROBE
COMPRESSOR
CONTACTOR
ELECTRONIC
AIR CLEANER
HUMIDIFIER
INDUCER
CIRCULATOR
BLOWER
50A55
24 VAC
120 VAC
24 VAC CLASS II
TRANSFORMER
HOT
(LINE)
NEUTRAL
(LINE)
TH
TR
Low Voltage (24 VAC)
Line Voltage (120 VAC)
LEGEND
N. C. = Normally closed switch
N. O. = Normally open switch
RO1
RO2
TYPICAL SYSTEM WIRING DIAGRAM
TWIN*
TWIN*
50A55-843
in other
furnace(s)
—
TWINNING
APPLICATIONS
ONLY
50A55-843
WIRING AND
CONFIGURATION
Flame Current Requirements:
Minimumcurrenttoinsureflamedetection.............1 µa DC➀
Maximum current for non-detection .....................0.1 µa DC➀
Maximumallowableleakageresistance .............100 M ohms
Flame establishing time ......................0.8 seconds maximum
Flame failure response time ...............2.0 seconds maximum
➀
MeasuredwithaDCmicroammeterintheflameprobelead
50A55-843
www.white-rodgers.com
183
TECHNICAL
HELP
Also See for White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control
- White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control Catalog Page 1 pages
- White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control Installation Instructions 8 pages
- White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control Reference Guide 2 pages
- White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control Specification Sheet 2 pages
- White Rodgers 50A55-843 Universal Silicon Carbide Integrated Furnace Control Troubleshooting 6 pages
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