Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 64

HONEYWELL
UNIVERSAL
Existing
Function
Terminals
Common
X
Power
R
or
Compressor
Y1 Y
1st Stage
W1
Heat
or
Aux. Heat
W W2
Fan
G
C/O Valve
B
Heat
C/O Valve
O
Cool
or or
System
L1 X1 L
Monitor
EM. Heat
E
Multiple Aux.
W3
Heat Loads
LED Indication
X2
2nd Stage
–
Compressor
2nd Stage
–
Cool
Configure O/B (select models) in Installer Setup.
For best performance, use a NEMA standard transformer.
Terminal is for multiple second stage heating loads such as contactors,
sequencers, or relays.
Terminal X (C) must be connected to transformer common.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
Do not remove factory-installed jumper.
T841A1084
T841A1282
T841A1290
T841A1340
T841A1563
T872G1000/Q672F1018
T872G1224/Q672F1208
70-6627 • 62
Electromechanical
X X X
R R R
Y Y Y1
– W1 W1
W2 W2 W2
G G G
B B B
O O O
L
E E E
W3 W3 W3
– X2 X1 X2
– – –
– – –
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T872R1008/Q672B1046
T872R1057/Q672L1037
T874G1113/Q674L1041
T874G1139/Q674A
T874G1212/Q674F1238
T874G1246/Q674F1212
T874G1246/Q674F1410
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
–
X1 X2 –
– –
– –
Optional CHECK LED. See Fig. 26.
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
Thermostat will have connection to either O or B terminal, not both.
LED is energized when terminal is powered.
L terminal is powered continuously when thermostat is in Em. Ht. position.
When W2 is not used, configure W2 cycle rate to NC.
T874G1444/Q674J1027
T874G1626/Q674F1436
T874R1004/Q674B1042
T874R1004/Q674B1109
T874R1061/Q674L1082
T874R1152/Q674L1207
T874R1285/Q674L1157
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
– – X1 X2
– – –
– – –
T874R1350/Q674L1181
T874R1376/Q674L1207
T874R1392/Q674L1447
T874R1475/Q674L1520
T874R1491/Q674L1553
C
R
Y1/W1
–
Aux.
G
O/B O/B
O/B O/B
L
E
–
W2
Y2
M13186