Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 114

YORK/BORG WARNER
DIRECT REPLACEMENTS (OUTDOOR THERMISTOR MODELS) B2CH, B2PS, E1CS, E1EB, E1HB, E2CH
Existing
Function
Terminals
Common
B
Power
R
Compressor
Y
1st Stage
–
Heat
Aux. Heat
W
Fan
G
C/O Valve
H
Heat
C/O Valve
O
Cool
System Monitor/
F
System Defrost
Em. Heat
X
Outdoor
T
Thermistor
F and H terminals are not available on all models.
Tape off. Thermostat replaces outdoor reset models with improved zero droop
performance.
Terminal must be connected to the transformer common.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T872G1042/Q672J1021
T874R1251/Q674L1272 (2TH11702324)
70-6627 • 112
Electromechanical
B B B
R R R
Y Y Y
– – –
W W W
G G G
– – –
O O O
F F F
X2 X2 X2
T T T
T874R1145/Q674L1272
T874R1327/Q674L1272 (6TH11702224)
Electronic Replacement or Upgrade
®
Chronotherm
III
C C
R R
Y1 Y
W1 W1
W2 W2
G G
B B B
O O O
L L
E E
Configure O/B (select models) in Installer Setup.
Do not remove factory-installed jumper.
Configure W2 cycle rate to NC.
Chronotherm
IV
C C C
R R R
Y1 Y Y1
W1 W1 W1
W2 W2 W2
G G G
or or
O/B B B O/B
or or
O/B O O O/B
L L L
E E E
T874R1169/Q674L1330
C
R
Y1/W1
–
Aux.
G
O/B
O/B
L
E
M13216