Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 76

KEEPRITE
Existing
Function
Terminals
Common
B
Power
R
Compressor
Y
1st Stage
–
Heat
Aux. Heat
W
Fan
G
C/O Valve
–
Heat
C/O Valve
O
Cool
System
–
Monitor
Em. Heat
X
Multiple Aux.
Heat Loads
–
LED Indication
–
2nd Stage
–
Compressor
2nd Stage
–
Cool
Configure O/B (select models) in Installer Setup.
When W2 is not used, configure W2 cycle rate to NC.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
70-6627 • 74
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
– – –
– – –
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T874R1814/Q674L1132
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 –
– –
– –
Terminal X (C,B) must be connected to transformer common.
Leave factory-installed jumper in place.
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
– – –
– – –
C
R
Y1/W1
–
Aux.
G
O/B O/B
O/B O/B
L
E
–
–
W2
Y2
M13193