Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 80

IMPORTANT:
DISCONNECT POWER SUPPLY BEFORE BEGINNING WIRING.
TIE FORMER OUTSIDE
STEP
TRANSFORMER COMMON
3
TO NEW TRANSORMER
COMMON
70-6627 • 78
STEP
1
TAPE OFF
X X
YELLOW
INDOOR BLOWER
RELAY
COMPRESSOR
CONTACTOR
DEFROST
RELAY
REVERSING
VALVE
EMERGENCY
HEAT RELAY
3
HEAT RELAY
NO. 1
SERVICE
LIGHT
THERMOSTAT
THERMISTOR
OUTDOOR
THERMOSTAT
HEAT RELAY
HEAT RELAY
NO. 2
NO. 1 (AUX)
1 RELAY REQUIRED TO OPERATE SYSTEM MONITOR LIGHT ON TRADELINE
THERMOSTATS. TAPE OFF IF NOT DESIRED.
ATTACH BOTH WIRES (FORMER
STEP
VR AND V) TO REPLACEMENT
4
THERMOSTAT R TERMINAL
REMOVE FORMER
OUTSIDE
TRANSFORMER
DEFROST
CONTROL
RELAY
DEFROST
RELAY
1
TAPE
OFF
EMERGENCY
HEAT RELAY
STEP REPLACE FORMER INDOOR
TRANSFORMER WITH NEW 75VA
2
AT88A1021 OR AT175A1008
REPLACEMENT
THERMOSTAT/
FORMER SUBBASE
V
G
F
M Y
(Y1 + W1)
R O
E E
X
X
W2
Y
L L (X1)
X2
A
VR R
M958B