Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 108

WESTINGHOUSE
TYPICAL HE SERIES
Existing
Function
Terminals
Common
Power
V
Compressor
C
1st Stage
–
Heat
Aux. Heat
H2
Fan
F
C/O Valve
Z
Heat
C/O Valve
–
Cool
System Monitor/
–
System Defrost
Em. Heat
–
Multiple Aux.
–
Heat Loads
LED Indication
–
2nd Stage
–
Compressor
2nd Stage
–
Cool
Configure O/B (select models) in Installer Setup.
Use common from secondary side of system trransformer.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
Field-installed E to W2 (Aux W8900B) jumper required.
70-6627 • 106
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
– – –
– – –
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 –
– –
– –
Terminal must be connected to the transformer common.
Do not remove factory-installed jumper.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
When W2 is not used, 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
B O/B B B
or or
O/B O O
L L L
E E E
– – X1
– – –
– – –
C
R
Y1/W1
–
Aux.
G
O/B O/B
O/B O/B
L
E
X2 –
W2
Y2
M13212