Honeywell T7350 Installation Instructions Manual

Honeywell T7350 Installation Instructions Manual

Commercial programmable thermostat for single- or multi-stage conventional/heat pump systems
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T7350 Commercial Programmable
Thermostat
FOR SINGLE- OR MULTI-STAGE CONVENTIONAL/HEAT PUMP
SYSTEMS

APPLICATION

The T7350 Commercial Programmable Thermostat
controls 24 Vac commercial single zone heating,
ventilating and air conditioning (HVAC) equipment. The
T7350 consists of a thermostat and subbase. The
thermostat includes the display and keypad for 7-day
programming. The subbase includes equipment control
connections. The subbase mounts on the wall and the
thermostat mounts to the subbase.

MERCURY NOTICE

If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of an old control. If you have
questions, call Honeywell Customer Care Center
at 1-800-468-1502.

INSTALLATION

When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check ratings given in instructions and on the
product to ensure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Electrical Shock or Equipment Damage
Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
INSTALLATION INSTRUCTIONS

Location

Do not install the thermostat where it can be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the thermostat.
IMPORTANT
To avoid electrical interference, which can
cause erratic performances, keep wiring runs as
short as possible and do not run thermostat
wires adjacent to the line voltage electrical dis-
tribution systems. Use shielded cable. The
cable shield must be grounded only at the con-
trolled equipment case.
Subbase
WHEN USED TO SENSE ROOM TEMPERATURE
Install the thermostat about 5 ft. (1.5m) above the floor in
an area with good air circulation at average temperature.
(See Fig. 1.)
WHEN NOT USED TO SENSE ROOM TEMPERATURE
When using the remote-mounted temperature (and
humidity) sensor(s) to sense ambient conditions, install
the thermostat in an area that is accessible for setting
and adjusting the temperature and settings.
CAUTION
Equipment Damage Hazard.
Can damage the TIM connection beyond
repair.
Disconnect the TIM cable prior to opening or
closing the thermostat cover.
NOTE: Allow sufficient clearance below the thermostat
to plug in the TIM cable.
Install the remote-mounted sensor(s) about 5 ft. (1.5m)
above the floor in an area with good air circulation at
average temperature. (See Fig. 1.)
62-0195-04

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Summary of Contents for Honeywell T7350

  • Page 1 — radiant heat from sun or appliances. ventilating and air conditioning (HVAC) equipment. The — concealed pipes and chimneys. T7350 consists of a thermostat and subbase. The — unheated (uncooled) areas such as an outside wall thermostat includes the display and keypad for 7-day behind the thermostat.
  • Page 2 T7770A T7770A 5 FEET (1.5 METERS) M19606A Fig. 2. Four T7770A Sensors providing temperature M4823A averaging network for T7350 Thermostat. Fig. 1. Typical location of thermostat or remote-mounted sensor. Mounting Subbase WIRES THROUGH WALL The subbase mounts horizontally. MOUNTING HOLES IMPORTANT •...
  • Page 3: Setting Temperature

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT SETTINGS ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE. Using Thermostat Keys The thermostat keys are used to: • set current time and day, • program times and setpoints for heating and cooling, • override the program temperatures, •...
  • Page 4: Installer Setup

    Fig. 6. LCD display of all segments. NOTE: Spreadsheets of the CnfgID values are available online at http://customer.honeywell.com CAUTION The PDA T7350 Configuration Tool or the PC Tool Possible Equipment Damage. LonSpec can also be used as follows: Fan must be running when system is 1.
  • Page 5 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 12. Display prompts SAV CFG (save configuration). 3. Use the up or down key to change the setting. a. If you want to save the new configuration, use Options are: the up or down key to change NO to YES •...
  • Page 6 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3. T7350 Key Function Summary. Grouping Button Definition Information Down Arrow Lowers setpoint, day, or time. When setting times or temperatures, hold key down to continuously decrease value. Also can make temporary change in temperature setpoint.
  • Page 7: Special Functions

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Special Functions Use the Test Mode to check the thermostat configurations and operation. To start the system test: 1. Press Schedule Day, Occupied and Not Occupied Restore Factory Configuration (Run/Clear) simultaneously. 2. The display gives the option to TEST.
  • Page 8 °C display. display. Bad thermostat location. Relocate the thermostat. Display shows three dashes and a T7350 is set for remote sensing and sensor is missing or circuit degree sign (all systems shut is either open or shorted. down). Temperature Upper or lower temperature limits...
  • Page 9 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 4. Troubleshooting Information. (Continued) Symptom Possible Cause Action Cooling will not No power to the thermostat. Check that X terminal is connected to the system transformer. come on. Check for 24 Vac between X and RH terminals.
  • Page 10 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT OUTDOOR T7770 REMOTE SENSOR COMPRESSOR SENSOR CONTACTOR 2 DISCHARGE HEAT SENSOR RELAY 2 SUBBASE HEAT RELAY RELAY 1 COMPRESSOR CONTACTOR 1 ECONOMIZER (HOT) (HOT) HEATING COOLING TRANSFORMER TRANSFORMER POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
  • Page 11 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT OUTDOOR AUX HEAT T7770 REMOTE SENSOR SENSOR STAGE 1 DISCHARGE COMPRESSOR SENSOR CONTACTOR 2 SUBBASE CHANGE RELAY OVER COMPRESSOR CONTACTOR 1 ECONOMIZER (HOT) (HOT) HEATING COOLING TRANSFORMER TRANSFORMER POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
  • Page 12 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT MODULATING OUTDOOR COOL – T7770 REMOTE SENSOR (4-20 mA) SENSOR MODULATING DISCHARGE HEAT – (4-20 mA) SENSOR SUBBASE HEAT HUMIDITY MOTION RELAY RELAY 1 SENSOR SENSOR COMPRESSOR CONTACTOR 1 ECONOMIZER (HOT) (HOT) HEATING COOLING TRANSFORMER TRANSFORMER POWER SUPPLY.
  • Page 13 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT OUTDOOR COMPRESSOR T7770 REMOTE SENSOR ECONOMIZER SENSOR CONTACTOR 2 DISCHARGE HEAT HEAT RELAY 3 RELAY 2 SENSOR SUBBASE W3/Y4 Y3 COMPRESSOR CONTACTOR 3 ® HEAT ORKS HUMIDITY MOTION RELAY 1 RELAY SENSOR SENSOR ® ORKS COMPRESSOR...
  • Page 14 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT DEHUMIDIFICATION (T7350D,H,M) Reset Temp SetPt There are five methods through which the T7350 can control for dehumidification. Three of them modify the The room temperature set point resets to a specified control algorithm, thus providing limited dehumidification number of degrees below the actual set point when room through cooling.
  • Page 15 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 62-0195—04...
  • Page 16 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered Trademark © 2008 Honeywell International Inc. 62-0195—04...

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