Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 54

EVCON/COLEMAN
TYPICAL 3700, 3900, 4400, 6500, 7100, 9200 (3600 SERIES THERMOSTAT) DIRECT REPLACEMENTS
Existing
Function
Terminals
Common
X
Power
R
Compressor
Y
1st Stage
–
Heat
Auxiliary
W2
Heat
Fan
G
C/O Valve
B
Heat
C/O Valve
O
Cool
System Monitor/
L
System Defrost
Em. Heat
E
2nd Stage
–
Compressor
Terminal X (C) must be connected to transformer common.
When W2 is not used, configure W2 cycle rate to NC.
Do not remove factory-installed jumper.
To eliminate automatic fan in emergency heat mode, connect switching
relay as shown on page 9.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
70-6627 • 52
Electromechanical
X X X
R R R
Y Y Y
– – –
W2 W2 W2
G G G
B B B
O O O
L L L
E E E
– – –
T874G1501 (3600-375)/Q674F1378
T874G1576 (3600-373)/Q674F1402
T874R1368 (3600-368)/Q674L1421
Electronic Replacement or Upgrade
®
Chronotherm
III
C C
R R
or
Y1 Y Y
W1 W1
W2 W2
G G
B B
O O O
L L
E E
– –
Configure O/B (select models) in Installer Setup.
LED is energized when terminal is powered.
L terminal is powered continuously when thermostat is in Em. Ht. position.
Chronotherm
IV
C C C
R R R
Y1 Y Y1
W1 W1 W1
W2 W2 W2
G G G
or or
B O/B B B
or or
O/B O O
L L L
E E E
– – –
C
R
Y1/W1
–
Aux.
G
O/B O/B
O/B O/B
L
E
W2
M13157