Honeywell Heat/1Cool User Guide - Page 109

Typical 2-speed Pump

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Electromechanical Chronotherm® III WESTINGHOUSE TYPICAL 2-SPEED PUMP Electronic Replacement or Upgrade Chronotherm IV Q6T7³844F1D0121265 T8611M7008 T8511M1002 T8T6816111M2M0220517 W89P00C8B910000/2 Function Existing Terminals Common ¿ X X1 Power R 1st Stage Heat - Compressor Stage 1 Y1 Compressor Stage 2 Y2 2nd Stage Heat - Auxiliary 3rd - Stage Heat R W1 » Y1 Y2 ² W2 - Fan G G C/O Valve O O Cool C/O Valve B Heat System Monitor/ L System Defrost » º X2 Em. Heat W E LED Indication - - ³ When subbase system switch is in AUTO position, equipment will operate in COOL mode only. · IMPORTANT: Do not use T874D/Q674F1022 if B terminal is used on original equipment. » Y1 to W1 jumper required. ¿ Terminal must be connected to the transformer common. C C R R - - Y Y1 Y2 Y2 ² W2 - W3 W3 C C R R - - Y1 Y1/W1 Y2 Y2 ² - W2 W3 Aux. G O B ¾ L G ¶ O/B ¶ O/B º L G ¶ O/B ¶ O/B ¾ L G ¶ O/B ¶ O/B º L E E ´ X1 X2 - E E X1 X2 ´ - ´ Optional LED indication activated with completed circuit on X1 and X2 terminals. ² Y2 to W2 jumper required. ¶ Configure O/B (Select Models) in Installer Setup. º LED is energized when terminal is powered. ¾ L terminal is powered continuously when thermostat is in Em. Ht. position. M13242 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T872G1356/Q672L1219 T874D,G/Q674L1223 70-6627 • 107

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70-6627
•
107
WESTINGHOUSE
TYPICAL 2-SPEED PUMP
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T872G1356/Q672L1219
T874D,G/Q674L1223
T8611M2017
T8611M2025
Function
Existing
Terminals
T8611M7008
T8511M1002
Chronotherm
®
III
Electronic Replacement or Upgrade
Common
D
Power
1st Stage Heat
Compressor Stage 1
Compressor Stage 2
2nd Stage Heat
Auxiliary 3rd
Stage Heat
Fan
C/O Valve
Cool
C/O Valve
Heat
System Monitor/
System Defrost
Em. Heat
LED Indication
M13242
G
G
A
When subbase system switch is in AUTO position, equipment will
operate in COOL mode only.
B
IMPORTANT:
Do not use T874D/Q674F1022 if B terminal is used on
original equipment.
C
Y1 to W1 jumper required.
D
Terminal must be connected to the transformer common.
E
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
F
Y2 to W2 jumper required.
G
Configure O/B (Select Models) in Installer Setup.
H
LED is energized when terminal is powered.
I
L terminal is powered continuously when thermostat is in Em. Ht. position.
PC8900/
W8900B1002
Electromechanical
T84D1165
Q674F1022
A
H
E
E
G
G
I
G
H
H
G
I
C
X
X1
C
C
C
C
R
R
R
R
R
R
–
W1
–
–
–
–
Y1
Y1
Y
Y1
Y1
Y1/W1
Y2
Y2
Y2
Y2
Y2
Y2
–
W2
W2
–
–
W2
–
–
W3
W3
W3
Aux.
G
G
G
G
G
G
O
O
O
O/B
O/B
O/B
B
B
O/B
O/B
O/B
L
X2
L
L
L
L
W
E
E
E
E
E
–
–
X1
X2
–
X1
X2
–
F
F
F
C
Chronotherm IV