Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 70

INTERCITY PRODUCTS/HEIL QUAKER/WHIRLPOOL/TEMPSTAR
Existing
Function
Terminals
Common
X
Power
R
Compressor
Y
1st Stage
W1
Heat
Auxiliary
W2
Heat
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
–
Defrost
P
2nd Stage
–
Compressor
Terminal X (C) must be connected to transformer common.
Remove factory-installed Y1 (Y) to W1 jumper.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers or
relays.
Configure O/B (select models) in Installer Setup.
If multiple auxiliary heat loads are used, connect to W2 (W8900B) terminal.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
70-6627 • 68
Chronotherm
Electromechanical
X X
R R
Y Y1
W1 W1
W2 W2
G G
B B
O O
L
E E
W3 W3
X2 X1 X2
– –
– –
T8611R1190 (HQ1149375HW)
T874R1947/Q674L1819 (HQ1149406HW/HQ1149407HW)
Electronic Replacement or Upgrade
®
III
C C C
R R R
Y1 Y Y1
W1 W1 W1
W2 W2 W2
G G G
or
B B B O/B
or
O O O O/B
L L L
E E E
– – –
P – –
– – –
If separate Y1 and W1 terminals are required, install R8222D1014. See
page 12.
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
Y Y1 Y1/W1
W1 W1
W2 W2 Aux.
G G G
or
B B O/B O/B
or
O O O/B O/B
L L L
E E E
– X1 X2 –
– – –
– – W2
M13159