Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 51

Existing
Function
Terminals
Common
X
Power
R
or
1st Stage
HP1 HP
Compressor
1st Stage
–
Heat
2nd Stage
–
Aux. Heat
3rd Stage
–
Aux. Heat
Fan
G
2nd Stage
HP2
Comp.
C/O Valve
B
Heat
C/O Valve
O
Cool
System Monitor/
–
System Defrost
EM. Heat
–
Multiple Aux.
–
Heat Loads
Remote Sensor
–
LED Indication
–
Configure O/B (select models) in Installer Setup.
Both first stage heat and cool are connected to HP terminal.
If provided on original equipment.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
Terminal X (C) must be connected to transformer common.
Electromechanical
X X X
R R R
Y Y1 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
Electronic Replacement or Upgrade
Chronotherm ®
III
C C
R R
or
Y1 Y Y
W1 W1
W2 W2
W3 –
G G
Y2
B B
O O O
L L
E E
– –
– –
X1 X2 –
Optional CHECK LED on T8611G,M. See Fig. 26 and 27.
Do not remove factory-installed jumper.
Field-installed X2 to X jumper (provided).
When W2 is not used, configure W2 cycle rate to NC.
T8611M7008 Model.
ENERSTAT
Chronotherm
IV
C C C
R R R
Y1 Y Y1
W1 W1 –
W2 W2 W2
– – W3
G G G
Y2
or
B O/B B O/B
or
O/B O O/B
L L L
E E E
– – –
– – –
– – X1 X2
C
R
Y/W1
–
Aux.
–
G
Y2
O/B
O/B
L
E
–
–
–
M13173
70-6627 • 49