Honeywell T7351 - Page 20

T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2010 Honeywell International Inc.
63-2666—02 M.S. Rev. 09-10
Printed in U.S.A.
Fig. 16. Typical hookup of T7351F2010 in two-stage heat and two-stage cool heat pump system with two transformers.
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
WHEN USING THE TR23-H FOR HUMIDITY SENSING, THERE IS NO NEED TO WIRE THE HC TERMINAL
BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1
COMMON AT THE SENSOR.
1
M29323
2
2
3
4
4
RC X
SUBBASE
O/B G Y1
W1W2 Y2
AUX RH
T5 T6 T7 T4 T3
DISCHARGE
AIR SENSOR
OUTDOOR
AIR
SENSOR
OS OS AS AS
1
3
L1
(HOT)
L2
1
L1
(HOT)
L2
COMPRESSOR
CONTACTOR 1
COMPRESSOR
CONTACTOR 2
HEATING
TRANSFORMER
COOLING
TRANSFORMER
CHANGE-
OVER
FAN
RELAY
ECONOMIZER
AUX HEAT
STAGE 1
MOTION
SENSOR
HUMIDITY
SENSOR
MMHC HPHS
TR23-H REMOTE SENSOR
9
8
76
5
4
3
21
10
11
12
GND SENSOR SET PT
LED
BYPASS