Install Instructions

ManualsBrandsHoneywell ManualsCommercial Pro ThermostatsProgrammable Commercial Thermostat with 3 Heat/3 Cool Conventional/Heat Pump

INSTALLATION INSTRUCTIONS

Place Bar Code Here

62-0195-06

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

hazardous 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.

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

distribution systems. Use shielded cable. The

cable shield must be grounded only at the

controlled 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.)

If multiple remote sensors are required, they must be

arranged in a temperature averaging network consisting

of four sensors. (See Fig. 2.)

Summary of content (12 pages)

PAGE 1
T7350 Commercial Programmable Thermostat FOR SINGLE- OR MULTI-STAGE CONVENTIONAL/ HEAT PUMP SYSTEMS INSTALLATION INSTRUCTIONS 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.
PAGE 2
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT NOTE: Only TR21 models with no setpoint adjustment can be used for temperature averaging. YES NO NO NO 5 FEET (1.5 METERS) 2. Use a pencil to mark the mounting holes. (See Fig. 3.) 3. Remove the subbase from the wall and drill two 3/16 in. (4.8 mm) holes in the wall (if drywall) as marked. For firmer material such as plaster or wood, drill two 7/32 in. (5.6 mm) holes. 4. Gently tap anchors (provided) into the drilled holes until flush with the wall. 5.
PAGE 3
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT NOTE: See Fig. 5 for keypad information. A. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE. Setting Temperature Refer to Table 2 for the default temperature setpoints. See the Product Data (form 63-2605) for complete instructions on changing the setpoints. Setting System and Fan System default setting is Auto. Fan default setting is On. NOTE: Use System and Fan keys to change settings.
PAGE 4
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT INSTALLER SETUP For most applications, the thermostat factory settings do not need to be changed. Review the factory settings in Table 2. NOTE: When power is first applied to the thermostat, the display will show all segments (see Fig. 6). Table 2. Default setpoints.
PAGE 5
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3. T7350 Key Function Summary. Grouping Information Button Down Arrow Information Up Arrow Definition T 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. Obtains information (where humidity “high-limit” can be set), cycles through setup options. S Raises setpoint, day, or time.
PAGE 6
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Special Functions Restore Factory Configuration (Run/Clear) IMPORTANT This operation erases current configuration and restores factory defaults for all configuration, parameters, setpoints and schedules. To regain the old configuration requires device reconfiguration. 1. 2. 3. Press both Run Schedule and Clear Start Time. The display gives the option to revert to FAC CFG. a. To restore the factory defaults, press up S or down T until the display indicates YES. b.
PAGE 7
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 4. Troubleshooting Information. (Continued) Symptom Possible Cause Action Temperature settings will not change. (Example: Cannot set heating higher or cooling lower.) Upper or lower temperature limits were reached. Check the temperature setpoints: • Heating limits are 40 to 90°F (7 to 31°C) • Cooling limits are 45 to 99°F (9 to 37°C) Occupied setpoint temperature range stops were configured. Using a PDA, check setpoint stops.
PAGE 8
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT WIRING DIAGRAMS (FIG. 7-14) SUBBASE 2 X RH RC AUX W1 Y1 FAN RELAY HEAT RELAY 1 HEAT RELAY 2 G COMPRESSOR CONTACTOR 1 L2 1 L2 1 L1 (HOT) L1 (HOT) HEATING TRANSFORMER COOLING TRANSFORMER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER. M19764A Fig. 7.
PAGE 9
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 4 3 5 LED 2 6 OUTDOOR AIR SENSOR BYPASS SENSOR 1 SET PT GND TR23 REMOTE SENSOR 7 8 9 10 11 12 HEAT RELAY 2 DISCHARGE AIR SENSOR COMPRESSOR CONTACTOR 2 SUBBASE T5 T6 T7 T4 T3 OS OS AS AS W2 Y2 Y1 G 2 X RH RC W1 AUX FAN RELAY HEAT RELAY 1 COMPRESSOR CONTACTOR 1 HEAT RELAY 3 1 L2 L2 1 L1 (HOT) L1 (HOT) HEATING TRANSFORMER COOLING TRANSFORMER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
PAGE 10
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 4 3 5 OUTDOOR AIR SENSOR BYPASS 2 SET PT SENSOR 1 LED GND TR23-H REMOTE SENSOR 7 8 9 10 11 12 6 HEAT RELAY 2 DISCHARGE AIR SENSOR COMPRESSOR CONTACTOR 4 COMPRESSOR CONTACTOR 2 SUBBASE T5 T6 T7 T4 HS HC T3 OS OS AS AS HP M M X RH W3/Y4 Y3 RC AUX W1 W2 Y2 Y1 G COMPRESSOR CONTACTOR 3 5 HUMIDITY SENSOR 3 MOTION SENSOR HEAT RELAY 1 COMPRESSOR CONTACTOR 1 4 1 L2 2 FAN RELAY ECONOMIZER L1 (HOT) 1 POWER SUPPLY.
PAGE 11
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 3 4 5 LED 2 7 8 9 10 11 12 6 MODULATING R COOL – + (4-20 mA) X OUTDOOR AIR SENSOR BYPASS SENSOR 1 SET PT GND TR23-H REMOTE SENSOR MODULATING HEAT – + (4-20 mA) DISCHARGE AIR SENSOR R X SUBBASE T5 T6 T7 T4 EB EB HS HC T3 OS OS AS AS HP M M X RH MH MC RC AUX W1 AUX Y1 HUMIDITY SENSOR FAN RELAY HEAT RELAY 1 MOTION SENSOR COMPRESSOR CONTACTOR 1 3 1 G 2 4 LONWORKS® BUS LONWORKS® BUS MX L2 L2 1 L1 (HOT) ECONOMIZER L1
PAGE 12
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT DEHUMIDIFICATION (T7350D,H,M) There are five methods through which the T7350 can control for dehumidification. Three of them modify the control algorithm, thus providing limited dehumidification through cooling. The other two use the auxiliary output to control another device. Reset Temp SetPt The room temperature setpoint resets to a specified number of degrees below the actual setpoint when room relative humidity (RH) rises above humidity high limit setpoint.