Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 41

Existing
Terminals
Function
or
Common
X C
or X1
Power
R
Compressor
Y
1st Stg. Heat
W1
or
Aux. Heat
W2 W1
Fan
G
C/O Valve
B
Heat
C/O Valve
O
Cool
or
System Monitor/
L X
System Defrost
EM. Heat
E
Multiple Aux.
–
Heat Loads
LED Indication
–
Defrost
P
2nd Stage
–
Compressor
Configure O/B (select models) in Installer Setup.
When W2 is not used, configure W2 cycle rate to NC.
Terminal X (C, X1) must be connected to transformer common.
Terminal is for multiple second stage loads such as contactors,
sequencers, or relays.
Do not remove factory-installed jumper.
Optional CHECK LED on T8611G1004. See Fig. 26.
Field-installed X2 to X jumper (provided).
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T841A1142 (1506726)
T874G1592/Q674F1212
T874R1301/Q674L1181 (1505714)
T874R1525/Q674L1181
T874R1723/Q674L1702 (654958B07)
T8300A1193/Q6300A
ARCOAIRE/SNYDER GENERAL/COMFORTMAKER
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 X1
E E E
W3 W3 W3
– X2 X2
– – –
– – –
T841A1159 (1505726)
T874G1782/Q674J1175 (1506756)
T874R1483/Q674L1538 (1505721)
T874R1574/Q674L1538
T8611R1067 (1506-744)
Electronic Replacement or Upgrade
®
Chronotherm
III
C C
R R
or
Y1 Y Y
W1 W1
W2 W2
G G
B B
O O O
L L
E E
X1 X2 –
P –
– –
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
LED is energized when terminal is powered.
Available on T8611R1000 only.
If separate Y1 and W1 Terminals are required, install R8222D1014.
See page 12.
L terminal is powered continuously when thermostat is in Em. Ht. position.
AYC, AYD, AYF
Chronotherm
IV
C C C
R R R
Y1 Y Y1
W1 W1 W1
W2 W2 W2
G G G
or or
B O/B B B
or or
O/B O O
L L L
E E E
– – X1 X2
– – –
– – –
T874D1603
T874G1774/Q674J1175 (1505756)
T874R1517/Q674L1538 (1506721)
T874R1582/Q674L1538 (A02077)
T8611R1075 (1505-744)
C
R
Y1/W1
–
Aux.
G
O/B O/B
O/B O/B
L
E
–
–
W2
M13144
70-6627 • 39