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Honeywell T7350 Fig. 19. Typical hookup of T7350B in three-stage heat and two-stage cool heat pump system

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

63-2605—5 26

Fig. 19. Typical hookup of T7350B in three-stage heat and two-stage cool heat pump system

with two transformers.

Fig. 20. Typical hookup of T7350D in three-stage heat and three-stage cool conventional system with one transformer.

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.

1

M19767A

2

2

3

RCX

SUBBASE

O/B G

T7770 REMOTE SENSOR

Y1

W2 Y2

AUXRH

T5 T6 T7 T4 T3

DISCHARGE

AIR

SENSOR

OUTDOOR

AIR

SENSOR

OSOS AS

AS

1

3

L1

(HOT)

L2 1

L1

(HOT)

L2

COMPRESSOR

CONTACTOR 1

COMPRESSOR

CONTACTOR 2

HEATING

TRANSFORMER

COOLING

TRANSFORMER

CHANGE

OVER

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FAN

RELAY

ECONOMIZER

AUX HEAT

STAGE 1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.

HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

1

M19766A

2

3

2

3

4

RCX

SUBBASE

W1 G

T7770 REMOTE SENSOR

Y1

W3/Y4 Y3 W2 Y2

AUXRH

T5 T6 T7 T4 T3

DISCHARGE

AIR

SENSOR

OUTDOOR

AIR

SENSOR

MOTION

SENSOR

HUMIDITY

SENSOR

M

OSOS ASAS

MHC HP

HS

1

4

L1

(HOT)

L2

COMPRESSOR

CONTACTOR 1

COMPRESSOR

CONTACTOR 2

HEAT

RELAY 1

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FAN

RELAY

ECONOMIZER

HEAT

RELAY 2

COMPRESSOR

CONTACTOR 3

HEAT

RELAY 3

Contents

Main PRODUCT DATA T7350 Commercial Programmable Thermostat FOR SINGLE- OR MTG512ULTI-STAGE CONVENTIONAL/HEAT PUMP SYSTEMS APPLICATION FEATURES Contents ORDERING INFORMATION FEATURES Features Available via PDA Configuration Features via Optional Network Model-H SPECIFICATIONS Page T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Fig. 2. T7350H LonMark Space Comfort Controller Rooftop Object (8504) with Node Object. Hardware Input 563-26055 Hardware OutputHardware Output MERCURY NOTICE Location Subbase Mounting Subbase Page Wiring Page Mounting Thermostat on Subbase (Fig. 8) SETTINGS Using Thermostat Keys Setting Temperature Setting System and Fan System Settings INSTALLER SETUP % Setup Using Keypad Setting Keypad Lockout Configuration Special Functions Restore Factory Configuration (Run/Clear) Get Factory Schedule (Info/Clear) Test Mode (Occupied/Not Occupied/Schedule Day) T PROGRAMMING Setting Current Day/Time Setting Schedule Times Program Holidays Copying a Day Clearing Program Start Times Temperature Setpoints Setpoint Limits Programming Temperature Setpoints Using Temporary Occupied Override Using Temporary Not Occupied Override OPERATION Startup Operation T7350 Relay Logic Logic with Modulating Outputs (T7350H1017, M, only) O/B Terminal for Heat or Cool Changeover Recovery Ramping Logic Recovery Ramping for Conventional Systems Recovery Ramping for Heat Pump Systems Auxiliary Relay Relay for Time-Of-Day (Table 16) Relay for Economizers Other Uses for the Auxiliary Relay Default Auxiliary Relay Operations (T7350D, T7350H1009 only) Dehumidification (T7350D,M,H only) Control Through Cooling Options Utilizing Auxiliary Output TROUBLESHOOTING GUIDE (TABLE 19) Page WIRING DIAGRAMS (FIG. 17-25) Fig. 17. Typical hookup of T7350A in two-stage heat and one-stage cool conventional system Fig. 18. Typical hookup of T7350B in two-stage heat and two-stage cool conventional system 63-26055 26 Fig. 19. Typical hookup of T7350B in three-stage heat and two-stage cool heat pump system Fig. 21. Typical hookup of T7350D in two-stage heat and four-stage cool conventional system. Page Page APPENDIX - PDA USAGE Hardware Requirements Setting Clock PDA Programming Configuration Page Page Page Weekly (Wkly) Schedule Holidays Calibration Online Diagnostics