Honeywell Heat/1Cool User Guide - Page 37

Con O/B Select Models in Installer Setup.

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HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE ³ Terminal must be connected to the transformer common. · Terminal is for multiple auxiliary heat loads such as contactors, sequencers, or relays. » Configure O/B (Select Models) in Installer Setup. ¿ Optional LED indication activated with completed circuit on X1 and X2 terminals. ´ If separate Y1 and W1 terminals are required, install R8222D1014; (See page 12.) ² When W2 is not used, configure W2 cycle rate to NC. ¶ LED is energized when terminal is powered. º L terminal is powered continuously when thermostat is in Em. Ht. position. ¾ Do not remove factory-installed jumper. µ If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. ¸ Used on two-speed compressor heat pump applications. ¹ Used on heat pumps that energize the compressor on both first stage cooling and first stage heating through a common Y terminal. Ƹ Q674F1022 switching subbase available when separate first stage heat and cool terminals are required. See specific heat pump manufacturer's listing for hookup information. ƹ P terminal on T8611R1000 only. Energized in heating and cooling modes; shown only when used. ƺ Jumper W2 and Y2 if stage 2 heating and cooling are common. ƻ To change fan operation in Emergency Heat mode, see page 9. X1 TO R CHECK LED FAULT DETECTION SWITCH (YELLOW) X2 TO C/X SWITCH TO R (POWER) SIDE OF SYSTEM TRANSFORMER X1 TO R X1 CHECK LED (YELLOW) FAULT DETECTION SWITCH X2 TO C/X CHECK LED SWITCHING DEVICE (YELLOW) 24 VAC X2 SWITCH TO C (COMMON) SIDE OF SYSTEM TRANSFORMER SWITCH IN SECONDARY OF SEPARATE TRANSFORMER L1 (HOT) L2 M13246 70-6627 • 35

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35
HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE
A
Terminal must be connected to the transformer common.
B
Terminal is for multiple auxiliary heat loads such as contactors, sequencers, or relays.
C
Configure O/B (Select Models) in Installer Setup.
D
Optional LED indication activated with completed circuit on X1 and X2 terminals.
E
If separate Y1 and W1 terminals are required, install R8222D1014; (See page 12.)
F
When W2 is not used, configure W2 cycle rate to NC.
G
LED is energized when terminal is powered.
H
L terminal is powered continuously when thermostat is in Em. Ht. position.
I
Do not remove factory-installed jumper.
J
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal.
K
Used on two-speed compressor heat pump applications.
L
Used on heat pumps that energize the compressor on both first stage cooling and first stage heating through a common Y
terminal.
M
Q674F1022 switching subbase available when separate first stage heat and cool terminals are required. See specific heat pump
manufacturer’s listing for hookup information.
N
P terminal on T8611R1000 only. Energized in heating and cooling modes; shown only when used.
O
Jumper W2 and Y2 if stage 2 heating and cooling are common.
P
To change fan operation in Emergency Heat mode, see page 9.
L1
(HOT)
L2
X1
X2
CHECK
LED
(YELLOW)
FAULT DETECTION
SWITCH
SWITCH TO R (POWER) SIDE
OF SYSTEM TRANSFORMER
TO C/X
TO R
X1
X2
CHECK
LED
(YELLOW)
SWITCHING
DEVICE
SWITCH IN SECONDARY OF
SEPARATE TRANSFORMER
X1
X2
CHECK
LED
(YELLOW)
FAULT DETECTION
SWITCH
SWITCH TO C (COMMON) SIDE
OF SYSTEM TRANSFORMER
TO C/X
TO R
24 VAC
M13246