Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 47

Existing
Function
Terminals
Common
C
Power
R
1st Stg.
Y
Compressor
2nd Stg.
Y2
Compressor
2nd Stg.
W2
Heat Relay
Fan
G
C/O Valve
O
Cool
C/O Valve
–
Heat
System Monitor/
L
System Defrost
EM. Heat
E
Multiple Aux.
–
Heat Loads
Terminal C must be connected to transformer common.
Configure O/B in Installer Setup.
LED is energized when terminal is powered.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
Electromechanical
Chronotherm
T874S1001/Q674F1501 (HH07AT201/HH93AZ215)
T8611T7000 (HH07AX112)
T8611T7018 (HH07AX113)
TWO-SPEED COOLING COMPRESSORS
Electronic Replacement or Upgrade
® III
C C
R R
Y Y1
Y2 Y2
W2
G G
O O/B
B O/B
L L
E E
W3 W3
L terminal is powered continuously when thermostat is in Em. Ht. position.
If 2nd stage heat is auxiliary (electric resistive), connect auxiliary stage
to W3.
CARRIER
Chronotherm IV
C C
R R
Y1 Y1/W1
Y2 Y2
W2
G G
O/B O/B
O/B O/B
L L
E E
W3 Aux.
70-6627 • 45
M13150