Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 69

Function
Common
X
Power
R
Compressor
Y
1st Stage
–
Heat
Auxiliary
W2
Heat
Fan
G
C/O Valve
B
Heat
C/O Valve
O
Cool
System Monitor/
L
Sytem Defrost
Em. Heat
E
Multiple
–
Heat Loads
LED Indication
–
Defrost
P
2nd Stage
–
Compressor
2nd Stage
–
Cool
Remove factory-installed jumper for independent first stage heat and cool
operation.
Terminal must be connected to the transformer common.
Configure O/B (select models) in Installer Setup.
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
T874R1491/Q674L1553
T8300A1003/Q6300A1010
T8300A1029/Q6300A1036
T8611R1000
Existing Control Terminal Designation
X C
R R
Y Y1
W1 W1
W2 W2
G G
B B
O O
L L
E E
–
– –
– P
– –
– –
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T874G1600/Q674F1428
T8300A1011/Q6300A1002
T8300A1037/Q6300A1044
T8611G1004
B C
R R
Y1 Y
W1 –
W2 W2
G G
H B
O O
L L
E E
– X1 X2
– –
– –
– –
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
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.
If Y2 is used, T8611M may be used as replacement.
HONEYWELL
UNIVERSAL THERMOSTATS
Electronic Replacement or Upgrade
Chronotherm IV
C C
R R
Y Y1
W1 W1
W2 W2
G G
or
B B O/B
or
O O O/B
L L
E E
– X1 X2
– –
– –
– –
T8085R1015/Q682L1010
T8300A1045/Q6300A1002
T8300B1001/Q6300B1000
70-6627 • 67
C
R
Y1/W1
–
Aux.
G
O/B
O/B
L
E
–
–
W2
Y2
M13244