Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 58

FRIEDRICH
Existing
Function
Terminals
Common
X
Power
R
Compressor
Y
1st Stage
–
Heat
Aux. Heat
W2
Fan
G
C/O Valve
B
Heat
C/O Valve
O
Cool
System Monitor/
L
System Defrost
EM. Heat
E
Multiple Aux.
W3
Heat Loads
LED Indication
–
2nd Stage
–
Compressor
Configure O/B (select models) in Installer Setup.
LED is energized when terminal is powered.
Terminal is for multiple second stage heating loads such as contactors,
sequencers, or relays.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900)
terminal.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
70-6627 • 56
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
– – –
T841A1324 (AT12124)
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) must be connected to transformer common.
Do not remove factory-installed jumper.
Optional CHECK LED on T8611G1004. See Fig. 26.
Field-installed X2 to X jumper (provided).
L terminal is powered continuously when thermostat is in Em. Ht. position.
When W2 is not used, configure W2 cycle rate to NC.
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
M13179