Honeywell T7351F2010 - Digital Thermostat, 3h Installation Instructions Manual

Honeywell T7351F2010 - Digital Thermostat, 3h Installation Instructions Manual

Commercial programmable thermostat for single- or multi-stage conventional/heat pump systems

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T7351 Commercial Programmable Thermostat
FOR SINGLE- OR MULTI-STAGE CONVENTIONAL/HEAT PUMP SYSTEMS
APPLICATION
The T7351 Commercial Programmable Thermostat
controls 24 Vac commercial single zone heating,
ventilating and air conditioning (HVAC) equipment. The
T7351 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.
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.

INSTALLATION INSTRUCTIONS

— 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.
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).
NOTE: Only TR21 models with no setpoint adjustment
can be used for temperature averaging.
NO
NO
Fig. 1. Typical location of thermostat or
remote-mounted sensor.
YES
NO
5 FEET
(1.5 METERS)
Place Bar Code Here
62-0258-05
M4823A

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Summary of Contents for Honeywell T7351F2010 - Digital Thermostat, 3h

  • Page 1: Installation Instructions

    If you have WHEN NOT USED TO SENSE ROOM TEMPERATURE questions, call Honeywell Customer Care Center When using the remote-mounted temperature (and at 1-800-468-1502. humidity) sensor(s) to sense ambient conditions, install the thermostat in an area that is accessible for setting and adjusting the temperature and settings.
  • Page 2: Mounting Subbase

    T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Mounting Subbase The subbase mounts horizontally. IMPORTANT WIRES THROUGH WALL • When using the internal temperature or humidity MOUNTING sensor, the device must be mounted horizontally HOLES (with the LCD facing upwards). Precise leveling is not needed. •...
  • Page 3: System Settings

    T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Wiring Setting Temperature Follow equipment manufacturer wiring instructions when Refer to Table 2 for the default temperature setpoints. To available. Refer to the Wiring Diagram section for typical set the Occupied and Not Occupied Heat and Cool hookups.
  • Page 4: Installer Setup

    T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Temperature Set Day/Time Override Temporary Temporary Occupied Not Occupied Time Occupied Not Occupied HEAT COOL HEAT COOL Schedule System Clear Schedule Occupied Not Occupied Start Time Copy ON AUTO HEAT COOL M19610 Fig. 5. Thermostat key locations. INSTALLER SETUP A combination of key presses are required to use the Installer Setup feature:...
  • Page 5 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3. Installer Setup. (Continued) Text Default Choices Notes HEATPMP 0 0 - 2 Application Type Selection 0: Conventional 1: Heat Pump - Cooling (Energize O/B on call for cool) 2: Heat Pump - Heating (Energize O/B on call for heat) COOLSTG 1 0 - 4 Number of Cooling Stages...
  • Page 6 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3. Installer Setup. (Continued) Text Default Choices Notes TMP LIM 0 - 5 Temporary Setpoint Adjustment 0: 0 Deg. F 1: 1 Deg. F 2: 2 Deg. F 3: 3 Deg. F 4: 4 Deg. F 5: 5 Deg.
  • Page 7 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3. Installer Setup. (Continued) Text Default Choices Notes (DayLight Savings options only display when Date is valid) DSTMON1 3 0 - 12 DLS Spring Month DSTDAY1 0 - 31, 32 - 74 DLS Spring Day 0 - 31 = Day of Month 32 = Last Day of Month 33 = First Sunday...
  • Page 8: Special Functions

    T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 5. T7351 Key Function Summary. (Continued) Grouping Button Definition Temperature Occupied Sets Occupied Heat setpoint. Heat Occupied Sets Occupied Cool setpoint. Cool Sets Not Occupied Heat setpoint. Occupied Heat Sets Not Occupied Cool setpoint. Occupied Cool Sets day of week.
  • Page 9 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Test Mode (Occupied/Not Occupied/ NOTES: — These methods operate only during cooling. Schedule Day) — Selecting both Reheat and Reset options can cause frequent setpoint adjustments. This selection is not recommended. CAUTION Min. ON Time Possible Equipment Damage. Equipment damage can result if compressor is Dehumidifies by increasing the compressor minimum on cycled too quickly.
  • Page 10 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Dehumid Hot Gas BP Auxiliary output during call for multiple cooling stages for two reasons: The auxiliary output operates as shown in Table 6. 1. This method assumes that the cooling provides dehumidification. Table 6. Hot Gas Bypass Dehumidification Logic. 2.
  • Page 11: Wiring Diagrams

    T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT WIRING DIAGRAMS TR23-H REMOTE SENSOR OUTDOOR COMPRESSOR SENSOR CONTACTOR 2 10 11 12 DISCHARGE AUX HEAT STAGE 1 AIR SENSOR SUBBASE CHANGE- HUMIDITY MOTION OVER RELAY SENSOR SENSOR COMPRESSOR CONTACTOR 1 ECONOMIZER (HOT) (HOT) HEATING COOLING TRANSFORMER TRANSFORMER POWER SUPPLY.
  • Page 12 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT TR23-H REMOTE SENSOR OUTDOOR COMPRESSOR SENSOR CONTACTOR 2 10 11 12 DISCHARGE HEAT HEAT RELAY 3 RELAY 2 SENSOR SUBBASE W3/Y4 Y3 COMPRESSOR CONTACTOR 3 HEAT HUMIDITY MOTION RELAY 1 RELAY SENSOR SENSOR COMPRESSOR CONTACTOR 1 ECONOMIZER (HOT) POWER SUPPLY.
  • Page 13 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 7. Troubleshooting Information. (Continued) Symptom Possible Cause Action Heat 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. If missing 24 Vac: •...
  • Page 14 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 62-0258—05...
  • Page 15 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 62-0258—05...
  • Page 16 Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive ® U.S. Registered Trademark Toronto, Ontario M1V 4Z9 © 2010 Honeywell International Inc. 62-0258—05 M.S. Rev. 09-10 customer.honeywell.com Printed in U.S.A.

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T7351

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