Honeywell Heat/1Cool User Guide - Page 81

Existing, Terminals, PC8900, T874D1165

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Page 81 highlights

LENNOX HP11 IMPORTANT: Replace separate indoor/outdoor transformers with single 75 VA transformer. See diagram on page 78. Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV Q6T78474F1D0121265/ T8611M7008 T8511M1002 T8T6816111M2M0220517 W89P00C8B910000/2 Existing ³ Function Terminals Common ¿ X X1 C C C C ¶ Power Indoor VR R R R R R Common Outside X - - - - - ¶ Common Outside V ¶ ¶ ¶ ¶ ¶ Compressor Stage 1 M ´ Y1 Y Y1 Y1 Y1/W1 Compressor Stage 2 M2 Y2 Y2 Y2 Y2 Y2 Auxiliary Heat Y W2 W2 » W3 - » W3 - » W3 W2 Aux. » Fan F C/O Valve R Cool C/O Valve - Heat System Monitor/ L System Defrost G O B · X2 G O B µ L G º O/B º O/B ¾ L G º O/B O/B º µ L G º O/B º O/B ¾ L Em. Heat E E E E E E Thermistor A - - - - - 1st Stage Heat - W1 - - - - LED Indication - - ² X1 X2 - X1 X2 ² - ³ IMPORTANT: When subbase system is in AUTO position, equipment will operate in COOL mode only (Q674F1022). · For emergency heat indication, jumper E and X2. For auxiliary heat indication, jumper W2 and X2. For any X2 functions, X1 must be connected to transformer common. » For proper operation of auxiliary heat connect Y to W3 or AUX terminal. ¿ Terminal must be connected to the transformer common. ´ W1 to Y1 jumper required. ² Optional LED indication activated with completed circuit on X1 and X2 terminals. ¶ Replace separate indoor and outdoor transformers with one 75 VA transformer. See page 78 for wiring diagram. º Configure O/B (select models) in Installer Setup. ¾ LED is energized when terminal is powered. µ L terminal is powered continuously when thermostat is in Em. Ht. position. M13156 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T872G1323/Q672L1201 T874D1033 T874D1199 T874D1207/Q674L1199 T874D1207/Q674L1389 70-6627 • 79

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70-6627
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79
LENNOX
HP11
IMPORTANT: Replace separate indoor/outdoor transformers with single 75 VA transformer. See diagram on page 78.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T872G1323/Q672L1201
T874D1033
T874D1199
T874D1207/Q674L1199
T874D1207/Q674L1389
T8611M2017
T8611M2025
Function
Existing
Terminals
T8611M7008
T8511M1002
Chronotherm
®
III
Electronic Replacement or Upgrade
Common
D
Power Indoor
Common Outside
Common Outside
Compressor Stage 1
Compressor Stage 2
Auxiliary Heat
Fan
C/O Valve
Cool
C/O Valve
Heat
System Monitor/
System Defrost
Em. Heat
Thermistor
1st Stage Heat
LED Indication
M13156
H
C
G
G
H
A
IMPORTANT:
When subbase system is in AUTO position, equipment will
operate in COOL mode only (Q674F1022).
B
For emergency heat indication, jumper E and X2. For auxiliary heat
indication, jumper W2 and X2. For any X2 functions, X1 must be connected to
transformer common.
C
For proper operation of auxiliary heat connect Y to W3 or AUX terminal.
D
Terminal must be connected to the transformer common.
E
W1 to Y1 jumper required.
F
Optional LED indication activated with completed circuit on X1 and
X2 terminals.
G
Replace separate indoor and outdoor transformers with one 75 VA
transformer. See page 78 for wiring diagram.
H
Configure O/B (select models) in Installer Setup.
I
LED is energized when terminal is powered.
J
L terminal is powered continuously when thermostat is in Em. Ht. position.
PC8900/
W8900B1002
E
Electromechanical
T874D1165/
Q674F1022
B
F
F
H
H
C
J
H
I
I
H
J
C
G
C
G
G
G
G
X
X1
C
C
C
C
VR
R
R
R
R
R
X
–
–
–
–
–
V
M
Y1
Y
Y1
Y1
Y1/W1
M2
Y2
Y2
Y2
Y2
Y2
W2
–
–
W2
Y
W2
W3
W3
W3
Aux.
F
G
G
G
G
G
R
O
O
O/B
O/B
O/B
–
B
B
O/B
O/B
O/B
L
X2
L
L
L
L
E
E
E
E
E
E
A
–
–
–
–
–
–
W1
–
–
–
–
–
–
X1
X2
–
X1
X2
–
Chronotherm IV
A