Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 56

FEDDERS
Existing
Function
Terminals
Common
C
or
Power
Rc Rh R
or
Compressor
Y1 Y
1st Stage
W1
Heat
Auxiliary
W2
Heat
Fan
G
C/O Valve
–
Heat
C/O Valve
–
Cool
or
System Monitor/
L Z
System Defrost
Em. Heat
K
Multiple Aux.
–
Heat Loads
LED Indication
–
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.
Install R8222D1014 (see page 12) if separateY1 and W1 terminals are
required.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T872C/Q672L1102
T874C/Q674L1090
T874D1249
70-6627 • 54
Chronotherm
Electromechanical
X X
R R
Y Y1
W1 W1
W2 W2
G G
B B
O O
L X1
E E
W3 W3
X2 X2
– –
T874D1462/Q674E1205 (THTX-220-AOHB; 88-58-00550-001)
T874R1269/Q674L1066 (THTX-120-HEHB; 88-58-00540-001)
T874R1343/Q674L1413 (THTX-120-HEHC; 88-58-00560-001)
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
– – –
– – –
– – –
Field-installed X2 to X (C) jumper.
Configure O/B (select models) in Installer Setup.
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
M13158