Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 100

TRANE/AMERICAN STANDARD
Existing
Function
Terminals
Common
C
Power
R
or
Compressor
Y Y1
1st Stage
W1
Heat
Aux. Heat
W2
Fan
G
C/O Valve
B
Heat
C/O Valve
O
Cool
System Monitor/
L
System Defrost
Outdoor Stat
E
or
LED Indication
X1 X2
2nd Stage
–
Compressor
2nd Stage
–
Cool
Terminal must be connected to the transformer common.
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
Do not remove factory-installed jumper.
Optional LED on T8611G1004. See Fig. 26.
70-6627 • 98
Electromechanical
B B B
R R R
Y Y Y
– – –
W W W
G G G
– – –
O O O
F F F
X2 X2 X2
– – –
– – –
– – –
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 –
– –
– –
Configure O/B (select models) in Installer Setup.
When W2 is not used, configure W2 cycle rate to NC.
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
M13226