Honeywell Heat/1Cool User Guide - Page 45

Function, Chronotherm, Electronic Replacement or Upgrade, Electromechanical, Chronotherm IV

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Electromechanical Chronotherm® III CARRIER TYPICAL 38BQ » Electronic Replacement or Upgrade Chronotherm IV Q6T78474F1D0121265/ T8611M7008 T8511M1002 T8T6816111M2M0220517 W89P00C8B910000/2 Function Existing Terminals Common ³ C X1 C C C C Power R R R R R R 1st Stage Cool Y1 » Y1 » » » » » 1st Stage Heat W1 W1 » » » » · 2nd Stage Heat W2 W2 W2 Y2 Y2 W2 Fan G G C/O Valve - O Cool » G » O G »´ O/B G »´ O/B G »´ O/B C/O Valve - Heat Em. Heat E Common 1st Stage - Compressor » System Monitor/ - System Defrost LED Indication X B · E - - X2 · B E » Y L¶ X1 X2 ¿ O/B E Y1 » Lº - O/B E Y1 » L¶ X1 X2 ¿ O/B E Y1/W1 »² Lº - 2nd Stage Cool Y2 Y2 Y2 Y2 Y2 Y2 ³ Terminal must be connected to the transformer common. · For auxiliary heat LED indication, jumper X2 to W2 on Q674. For emergency heat LED indication, jumper X2 to E. » Relay required (R8222B1067 typically) for T8511M, T8611M, PC8900/W8900B1002 application. See page 9 for wiring diagram. ¿ Optional LED indication activated with completed circuit on X1 and X2 terminals. ´ Configure O/B (select models) in Installer Setup. ² Configure Y1/W1 terminal in installer setup. ¶ L terminal is continuously energized in Em. Heat Mode. º LED is energized when terminal is powered. M13148 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER) T874D1074/Q674F1030 (HHO7AT172/HH93AZ174) T874D1074/Q674F1063 (HH07AT172/HH93AZ181) 70-6627 • 43

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70-6627
•
43
CARRIER
TYPICAL 38BQ
C
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T874D1074/Q674F1030 (HHO7AT172/HH93AZ174)
T874D1074/Q674F1063 (HH07AT172/HH93AZ181)
T8611M2017
T8611M2025
Function
Existing
Terminals
T8611M7008
T8511M1002
Chronotherm
®
III
Electronic Replacement or Upgrade
Common
A
Power
1st Stage Cool
1st Stage Heat
2nd Stage Heat
Fan
C/O Valve
Cool
C
C/O Valve
Heat
Em. Heat
Common 1st Stage
Compressor
C
System Monitor/
System Defrost
LED Indication
2nd Stage Cool
M13148
C
C
B
C
C
C
A
Terminal must be connected to the transformer common.
B
For auxiliary heat LED indication, jumper X2 to W2 on Q674. For emergency
heat LED indication, jumper X2 to E.
C
Relay required (R8222B1067 typically) for T8511M, T8611M,
PC8900/W8900B1002 application. See page 9 for wiring diagram.
D
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
E
Configure O/B (select models) in Installer Setup.
F
Configure Y1/W1 terminal in installer setup.
G
L terminal is continuously energized in Em. Heat Mode.
H
LED is energized when terminal is powered.
PC8900/
W8900B1002
B
Electromechanical
T874D1165/
Q674F1022
B
D
D
CF
C
CE
CE
CE
Chronotherm IV
C
X1
C
C
C
C
R
R
R
R
R
R
Y1
Y1
W1
W1
W2
W2
W2
Y2
Y2
W2
G
G
G
G
G
G
–
O
O
O/B
O/B
O/B
–
B
B
O/B
O/B
O/B
E
E
E
E
E
E
–
–
Y
Y1
Y1
Y1/W1
–
–
L
L
L
L
X
X2
X1
X2
–
X1
X2
–
Y2
Y2
Y2
Y2
Y2
Y2
H
G
H
G
C
C
C
C
C
C
C
C