Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 102

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
Multiple Aux.
–
Heat Loads
or
LED Indication
X1 X2
2nd Stage
–
Compressor
2nd Stage
–
Cool
When W2 is not used, configure W2 cycle rate to NC.
Terminal must be connected to the transformer common.
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
Do not remove factory-installed jumper.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T841A1407 (ASYSTAT652)
T841A1530 (ASYSTAT652A)
T872G1059/Q672J1039
T872R1057/Q672L1037
T874G1204/Q674J1043
T874G1675/Q674J1142
(ASYSTAT650/WY28X0250)
70-6627 • 100
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
– – –
– – –
T874R1053/Q674L1140
T874R1426/Q674L1496 (BAYSTAT339/WY28X0112)
T874R1657/Q674L1611 (ASYSTAT651/WY28X235)
T874R1939 (ASYSTAT-651A)/Q674L1801 (THT1225)
T8141A1014
T8141A1071
T8300A1128/Q6300A1101 (BAY28X194/BAY28X195)
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 –
– –
– –
Optional Check LED on T8611G1004. See Fig. 26.
Field-installed X2 to X (C) jumper.
LED is energized when terminal is powered.
L terminal is powered continuously when thermostat is in Em. Ht. position.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
Configure O/B (select models) in Installer Setup.
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
– – –
– – –
T8611G1038 (THT-0603)
T8611G111 (TAYSTAT501)
T8611R1091
T8611R1109 (THT-0602)
T8611R1117 (ASYSTAT700)
C
R
Y1/W1
–
Aux.
G
O/B
O/B
L
E
–
W2
Y2
M13228