Typical System Wiring Table - White Rodgers UNIVERSAL INTEGRATED FURANCE CONTROL 50A65-843 Installation Instructions Manual

50A65
TERMINAL
W
G
R
Y
C
MV (2 terminals)
TR
TH
FP
PS
HLI
HLO
GND
RO1
RO2
(1 unused terminal)
IND
IGN
IND N
IGN N
COOL
HEAT
PARK (2 terminals)
LINE
XFMR
EAC (optional)
HUM (optional)
CIR N
LINE N
XFMR N
EAC N (optional)
HUM N (optional)
E33 3/16" spade terminal
* maximum recommended flame probe wire length is 36 inches.

TYPICAL SYSTEM WIRING TABLE

TERMINAL
TYPE
low voltage thermostat W terminal (or equivalent)
Terminal low voltage thermostat G terminal (or equivalent)
block with low voltage thermostat R terminal (or equivalent)
captive low voltage thermostat Y terminal (or equivalent)
screws (2nd wire from Y terminal goes to 24 VAC HOT side of
compressor contactor coil)
24 VAC COMMON side of compressor contactor coil
gas valve (both gas solenoids are connected in parallel)
24 VAC transformer (low voltage COMMON side)
24 VAC transformer (low voltage HIGH side)
12-pin flame sensor probe*
connector pressure switch INPUT
& harness high limit INPUT
high limit OUTPUT
MUST BE RELIABLY GROUNDED TO CHASSIS
rollout switch OUTPUT
rollout switch INPUT
inducer HOT side
4-pin
ignitor HOT side
connector
inducer NEUTRAL side
& harness
ignitor NEUTRAL side
spade terminal circulator blower COOL SPEED terminal
spade terminal circulator blower HEAT SPEED terminal
spade terminal unused circulator blower terminals
spade terminal input voltage (120 VAC) HOT side
spade terminal 24 VAC transformer line voltage HOT side
spade terminal electronic air cleaner HOT side
spade terminal humidifier HOT side
spade terminal circulator blower NEUTRAL terminal
spade terminal input voltage (120 VAC) NEUTRAL side
spade terminal 24 VAC transformer line voltage NEUTRAL side
spade terminal electronic air cleaner NEUTRAL side
spade terminal humidifier NEUTRAL side
Auxiliary flame sense
SYSTEM COMPONENT
CONNECTION
5