Installation Instructions
Page 1
... they must be a trained, experienced service technician. 4. 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. Contact your old control in an area with good air... only at 1-800-468-1502. If you have questions, call Honeywell Customer Care Center at the controlled equipment case. INSTALLATION INSTRUCTIONS - Failure to sense ambient conditions, install the thermostat in an area that is replacing a control that contains mercury in...
... they must be a trained, experienced service technician. 4. 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. Contact your old control in an area with good air... only at 1-800-468-1502. If you have questions, call Honeywell Customer Care Center at the controlled equipment case. INSTALLATION INSTRUCTIONS - Failure to sense ambient conditions, install the thermostat in an area that is replacing a control that contains mercury in...
Installation Instructions
Page 2
...: - Mounting to mark the mounting holes. (See Fig. 3). 3. Mount to latch. Position and level the subbase. Mounting the subbase. Swing the thermostat down. 3. B. by 4 in . Use a pencil to a 2 in . (50.8 mm by 101.6 mm) wiring box can be mounted ... the mounting screws into the thermostat top. 2. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE. A. Position the subbase over the holes, pulling wires through the wiring opening. 6. Engage top subbase tabs into the holes. 7. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Mounting Subbase The subbase mounts...
...: - Mounting to mark the mounting holes. (See Fig. 3). 3. Mount to latch. Position and level the subbase. Mounting the subbase. Swing the thermostat down. 3. B. by 4 in . Use a pencil to a 2 in . (50.8 mm by 101.6 mm) wiring box can be mounted ... the mounting screws into the thermostat top. 2. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE. A. Position the subbase over the holes, pulling wires through the wiring opening. 6. Engage top subbase tabs into the holes. 7. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Mounting Subbase The subbase mounts...
Installation Instructions
Page 3
...Heat setpoint, press both heat and cool modes. Securely tighten each terminal for heat or cool. - SETTINGS Using Thermostat Keys The thermostat keys are used to the Wiring Diagram section for heating or cooling. Table 1. To set system and fan operation... heat mode, when set the Standby Cool setpoint, press the Occupied Cool and Not Occupied Heat buttons simultaneously. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Wiring Follow equipment manufacturer wiring instructions when available. During scheduled Not Occupied periods, the effective occupancy Not Occupied No Motion...
...Heat setpoint, press both heat and cool modes. Securely tighten each terminal for heat or cool. - SETTINGS Using Thermostat Keys The thermostat keys are used to the Wiring Diagram section for heating or cooling. Table 1. To set system and fan operation... heat mode, when set the Standby Cool setpoint, press the Occupied Cool and Not Occupied Heat buttons simultaneously. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Wiring Follow equipment manufacturer wiring instructions when available. During scheduled Not Occupied periods, the effective occupancy Not Occupied No Motion...
Installation Instructions
Page 4
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Occupied HEAT Temperature COOL Not Occupied HEAT COOL Set Day/Time Day Time Override Temporary Temporary Occupied Not Occupied Schedule Clear System Fan Run Day Occupied Not Occupied Start Time Copy HEAT COOL ON AUTO Schedule Fig. 5. Thermostat key locations. NOTE:...until DEGREES 00 (or DEGREES 01) displays. Default Setpoints. Setup Using Keypad The installer uses the Installer Setup to customize the thermostat to the next Installer Setup number, press . Display prompts SAV CFG (save the new configuration, use the up or down ...
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Occupied HEAT Temperature COOL Not Occupied HEAT COOL Set Day/Time Day Time Override Temporary Temporary Occupied Not Occupied Schedule Clear System Fan Run Day Occupied Not Occupied Start Time Copy HEAT COOL ON AUTO Schedule Fig. 5. Thermostat key locations. NOTE:...until DEGREES 00 (or DEGREES 01) displays. Default Setpoints. Setup Using Keypad The installer uses the Installer Setup to customize the thermostat to the next Installer Setup number, press . Display prompts SAV CFG (save the new configuration, use the up or down ...
Installation Instructions
Page 5
... Stages 2: 2 Aux Stages Aux Contact Functionality 0: Time of Heat Pump Heating Stages (Only shown when Heat Pump is pressed again, the timer will begin. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Text Default Choices HEATPMP 0 0 - 2 COOLSTG 1 0 - 4 HEATSTG 1 0 - 3 AUX STG 0 0 - 2 AUX CON 0 0 - 3 WALLMOD 0 0 - 3 OATSENS 0 DATSENS 0 HUMSENS 0 0 - 1 0 ... T7771 (Remote sensor, Remote Setpoint, Bypass 1) (Bypass 0 means that by pressing the override button the thermostat goes from unoccupied to occupied and the LED will light up and the temporary occupied timer will restart.) (...
... Stages 2: 2 Aux Stages Aux Contact Functionality 0: Time of Heat Pump Heating Stages (Only shown when Heat Pump is pressed again, the timer will begin. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Text Default Choices HEATPMP 0 0 - 2 COOLSTG 1 0 - 4 HEATSTG 1 0 - 3 AUX STG 0 0 - 2 AUX CON 0 0 - 3 WALLMOD 0 0 - 3 OATSENS 0 DATSENS 0 HUMSENS 0 0 - 1 0 ... T7771 (Remote sensor, Remote Setpoint, Bypass 1) (Bypass 0 means that by pressing the override button the thermostat goes from unoccupied to occupied and the LED will light up and the temporary occupied timer will restart.) (...
Installation Instructions
Page 6
... Cool Outdoor Air Temperature (Only Displayed if Outdoor Sensor is (21° C) (-29° - 49° C) Selected) 62-0258-05 6 F 1: 1 Deg. F 5: 5 Deg. F 4: 4 Deg. F 2: 2 Deg. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3.
... Cool Outdoor Air Temperature (Only Displayed if Outdoor Sensor is (21° C) (-29° - 49° C) Selected) 62-0258-05 6 F 1: 1 Deg. F 5: 5 Deg. F 4: 4 Deg. F 2: 2 Deg. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3.
Installation Instructions
Page 7
... 4. Obtains information (where humidity "high-limit" can make temporary change in temperature setpoint. 7 62-0258-05 Also can be set), cycles through setup options. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Text Default Choices DSTMON1 3 DSTDAY1 40 0 - 12 0 - 31, 32 - 74 DSTMON2 11 DSTDAY2 33 0 - 12 0 - 31, 32 - 74 HT RESP 1 0 - 3 CL RESP 0 0 - 1 Table 3. DLS Fall...
... 4. Obtains information (where humidity "high-limit" can make temporary change in temperature setpoint. 7 62-0258-05 Also can be set), cycles through setup options. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Text Default Choices DSTMON1 3 DSTDAY1 40 0 - 12 0 - 31, 32 - 74 DSTMON2 11 DSTDAY2 33 0 - 12 0 - 31, 32 - 74 HT RESP 1 0 - 3 CL RESP 0 0 - 1 Table 3. DLS Fall...
Installation Instructions
Page 8
... Checkout. - a. b. To restore the factory schedule, press up or down until the display indicates YES. During not occupied periods and in one hour increments. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Grouping Temperature Set Override Schedule Table 5. Day Time Temporary Occupied Temporary Not Occupied Day Sets day of time without keypress): - System Selects System Mode. The...
... Checkout. - a. b. To restore the factory schedule, press up or down until the display indicates YES. During not occupied periods and in one hour increments. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Grouping Temperature Set Override Schedule Table 5. Day Time Temporary Occupied Temporary Not Occupied Day Sets day of time without keypress): - System Selects System Mode. The...
Installation Instructions
Page 9
...bypassed during typical off time for multiple cooling stages. 9 62-0258-05 Minimum On. - Can force wider temperature swings by a programmable amount. Equipment damage can occur. b. a. NOTE: The dehumidification high limit can be set point, this output. Reset. NOTES: -... The display gives the option to GET SHD. a. Hysteresis and a minimum timer are five methods through cooling. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Test Mode (Occupied/Not Occupied/ Schedule Day) CAUTION Possible Equipment Damage. b. Press Run Schedule. Save User Schedule (Info...
...bypassed during typical off time for multiple cooling stages. 9 62-0258-05 Minimum On. - Can force wider temperature swings by a programmable amount. Equipment damage can occur. b. a. NOTE: The dehumidification high limit can be set point, this output. Reset. NOTES: -... The display gives the option to GET SHD. a. Hysteresis and a minimum timer are five methods through cooling. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Test Mode (Occupied/Not Occupied/ Schedule Day) CAUTION Possible Equipment Damage. b. Press Run Schedule. Save User Schedule (Info...
Installation Instructions
Page 10
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Dehumid Hot Gas BP The auxiliary output operates as shown in Table 6. Humidity Cooling Stages Active Auxiliary Output High more than one De-energized High ...
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Dehumid Hot Gas BP The auxiliary output operates as shown in Table 6. Humidity Cooling Stages Active Auxiliary Output High more than one De-energized High ...
Installation Instructions
Page 11
... HEAT FAN RELAY 1 RELAY COMPRESSOR CONTACTOR 3 1 2 L2 L1 (HOT) COMPRESSOR CONTACTOR 1 4 ECONOMIZER 1 POWER SUPPLY. Typical hookup of T7351F2010 in two-stage heat and four-stage cool conventional system. 11 62-0258-05 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE TRANSFORMER... THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1 COMMON AT THE SENSOR. M29323 Fig. 7. WIRING DIAGRAMS T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT GND SENSOR SET PT LED BYPASS TR23-H REMOTE SENSOR 1 2 3 4 5 6 7 8 9 10 11 12 OUTDOOR AIR SENSOR DISCHARGE AIR...
... HEAT FAN RELAY 1 RELAY COMPRESSOR CONTACTOR 3 1 2 L2 L1 (HOT) COMPRESSOR CONTACTOR 1 4 ECONOMIZER 1 POWER SUPPLY. Typical hookup of T7351F2010 in two-stage heat and four-stage cool conventional system. 11 62-0258-05 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE TRANSFORMER... THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1 COMMON AT THE SENSOR. M29323 Fig. 7. WIRING DIAGRAMS T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT GND SENSOR SET PT LED BYPASS TR23-H REMOTE SENSOR 1 2 3 4 5 6 7 8 9 10 11 12 OUTDOOR AIR SENSOR DISCHARGE AIR...
Installation Instructions
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...conventional system with troubleshooting. Temperature Upper or lower temperature Check the temperature setpoints: settings will not Thermostat is locked. Press both Run Schedule and Copy, then reconfigure the display. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT GND SENSOR SET PT LED BYPASS TR23-H REMOTE SENSOR 1 2 3 4 5 6 7... SENSOR. if so, replace fuse. • Check if the HVAC equipment power switch is incorrect. Bad thermostat location. Remote temperature sensing is out of T7351F2010 in the Off position; M29255 Fig. 9. Check for °F or °C display. When a Check...
...conventional system with troubleshooting. Temperature Upper or lower temperature Check the temperature setpoints: settings will not Thermostat is locked. Press both Run Schedule and Copy, then reconfigure the display. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT GND SENSOR SET PT LED BYPASS TR23-H REMOTE SENSOR 1 2 3 4 5 6 7... SENSOR. if so, replace fuse. • Check if the HVAC equipment power switch is incorrect. Bad thermostat location. Remote temperature sensing is out of T7351F2010 in the Off position; M29255 Fig. 9. Check for °F or °C display. When a Check...
Installation Instructions
Page 13
...between X and RH terminals. Heating or cooling Wait one minute after the furnace has warmed to the system transformer. No power to the thermostat. If missing 24 Vac: • Check if circuit breaker is coming from the registers. if so, replace fuse. • Check if... off • Wait up to five minutes for 24 Vac between X and RH terminals. equipment is blown; T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 7. No power to the thermostat. time is blown; Conventional heating equipment turns the fan on . If 24 Vac is present, proceed with troubleshooting. Off or...
...between X and RH terminals. Heating or cooling Wait one minute after the furnace has warmed to the system transformer. No power to the thermostat. If missing 24 Vac: • Check if circuit breaker is coming from the registers. if so, replace fuse. • Check if... off • Wait up to five minutes for 24 Vac between X and RH terminals. equipment is blown; T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 7. No power to the thermostat. time is blown; Conventional heating equipment turns the fan on . If 24 Vac is present, proceed with troubleshooting. Off or...
Installation Instructions
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Registered Trademark © 2010 Honeywell International Inc. 62-0258-05 M.S. 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. Rev. 09-10 Printed in U.S.A.
Registered Trademark © 2010 Honeywell International Inc. 62-0258-05 M.S. 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. Rev. 09-10 Printed in U.S.A.