Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 107

Existing
Function
Terminals
Common
X
Power
R
1st Stage
W1
Heat
2nd Stage
W2
Heat
Fan
G
1st Stage
Y
Cool
2nd Stage
–
Cool
C/O Valve
–
Heat
C/O Valve
–
Cool
System Monitor/
–
System Defrost
Em. Heat
E
Multiple Aux.
–
Heat Loads
LED Indication
–
2nd Stage
–
Compressor
Remove factory-installed Y1 (Y) to W1 (W) jumper.
Terminal must be connected to the transformer common.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
Chronotherm
Electromechanical
X X
R R
W1 W1
W2 W2
G G
Y Y1
– –
B B
O O
L X1
E E
W3 W3
X2 X2
– –
Electronic Replacement or Upgrade
®
III
C C C
R R R
W1 W1 W1
W2 W2 W2
G G G
Y1 Y Y1
– – –
or
B B B O/B
or
O O O O/B
L L L
E E E
– – –
– – –
Field-installed X2 to X (C) jumper.
If separate Y1 and W1 terminals are required, install R8222D1014; see
page 12.
When W2 is not used, configure W2 cycle rate to NC.
WESTINGHOUSE
TYPICAL HB, HI RELI, HLO
Chronotherm
IV
C C C
R R R
W1 W1
W2 W2 Aux.
G G G
Y Y1 Y1/W1
– – Y2
or
B B O/B O/B
or
O O O/B O/B
L L L
E E E
– X1 X2 –
– – W2
M13211
70-6627 • 105