Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 116

YORK/BORG WARNER
Existing
Function
Terminals
Common
X
Power
R
Compressor
Y
1st Stage
Heat
Aux. Heat
W2
Fan
G
C/O Valve
–
Heat
C/O Valve
O
Cool
System Monitor/
L
System Defrost
Em. Heat
E
Multiple Aux.
W3
Heat Loads
LED Indication
–
2nd Stage
–
Compressor
–
2nd Stage
Cool
Configure O/B (select models) in Installer Setup.
When W2 is not used, configure W2 cycle rate to NC.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
If provided on original equipment.
Terminal must be connected to the transformer common.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
70-6627 • 114
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 X1
E E E
W3 W3 W3
– X2 X2
– – –
– – –
T874G1410/Q674F1311(6TH11703024)
Electronic Replacement or Upgrade
Chronotherm ®
III
C C
R R
or
Y1 Y Y
W1 W1
W2 W2
G G
B B B
O O O
L L
E E
X1 X2 –
– –
– –
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
Do not remove factory-installed jumper.
Optional Check LED on T8611G1004. See Fig. 26.
Field-installed X2 to X (C) jumper.
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
O/B B B O/B
or or
O/B O O O/B
L L L
E E E
– – X1 X2
– – –
– – –
C
R
Y1/W1
–
Aux.
G
O/B
O/B
L
E
–
W2
Y2
M13219