Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 118

ZONE AIRE
VHP SERIES
Existing
Function
Terminals
or
Common
X1 X
Power
R
Compressor
Y
1st Stage
–
Heat
Aux. Heat
W2
Fan
G
or
C/O Valve
B W1
Heat
C/O Valve
–
Cool
System Monitor/
L
System Defrost
Em. Heat
E
Multiple Aux.
W3
Heat Loads
LED Indication
X2
2nd Stage
–
Compressor
2nd Stage
–
Cool
Configure O/B (select models) in Installer Setup.
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.
Terminal must be connected to the transformer common.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
70-6627 • 116
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
T874R1129/Q674L1181
T874N1024/Q674F1261
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 –
– –
– –
Field-installed X2 to X (C) jumper.
Do not remove factory-installed jumper.
Optional Check LED on T8611G1004. See Fig. 26.
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.
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
– – –
– – –
C
R
Y1/W1
–
Aux.
G
O/B
O/B
L
E
–
W2
Y2
M13221