Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 99

Existing
Function
Terminals
Common
B
Power
R
Compressor
Y
1st Stage
–
Heat
Aux. Heat
W or W1
Fan
G
C/O Valve
–
Heat
C/O Valve
O
Cool
System Monitor/
F
System Defrost
or
Outdoor
T A
Sensor
Outdoor Stat
X2
LED Indication
–
2nd Stage
–
Compressor
2nd Stage
–
Cool
Terminal must be connected to the transformer common.
Tape off. Thermostat replaces outdoor reset with improved zero droop
performance.
Do not remove factory-installed jumper.
Optional LED indication with completed circuit on X1 and X2 terminals.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T841A1407 (ASYSTAT652)
T841A1530 (ASYSTAT652A)
T872G1059/Q672J1039
T872R1057/Q672L1037
T874G1204/Q674J1043
T874G1675/Q674J1142 (ASYSTAT650/WY28X0250)
T874R1053/Q674L1140
T874R1426/Q674L1496 (BAYSTAT339/WY28X0112)
T874R1657/Q674L1611 (ASYSTAT651/WY28X235)
Electromechanical
B B B
R R R
Y Y Y
– – –
W W W
G G G
– – –
O O O
F F F
T T T
X2 X2 X2
– – –
– – –
– – –
TRANE/AMERICAN STANDARD
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.
T874R1939 (ASYSTAT-651A)/Q674L1801 (THT1225)
T8141A1014
T8141A1071
T8300A1128/Q6300A1101 (BAY28X194/BAY28X195)
T8611G1038 (THT-0603)
T8611G1111 (TAYSTAT501)
T8611R1091
T8611R1109 (THT-0602)
T8611R1117 (ASYSTAT700)
DIRECT TRADE REPLACEMENTS
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
– – –
– – –
70-6627 • 97
C
R
Y1/W1
–
Aux.
G
O/B
O/B
L
E
–
W2
Y2
M13225