Installation Instructions
Page 1
... 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 subbase mounts on the product to ensure the product is replacing a control that is complete, check out product operation as an outside wall behind doors and in a temperature averaging network consisting of four sensors (See Fig. 2). Dispose of an old control. INSTALLATION When Installing this control...
... 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 subbase mounts on the product to ensure the product is replacing a control that is complete, check out product operation as an outside wall behind doors and in a temperature averaging network consisting of four sensors (See Fig. 2). Dispose of an old control. INSTALLATION When Installing this control...
Installation Instructions
Page 2
... thermostat from the wall and drill two 3/ 16 in. (4.8 mm) holes in . Position and level the subbase. The thermostat functions properly when not level. 2. Position the subbase over the holes, pulling wires through the wiring opening. 6. Mounting the subbase. then remove the top. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Mounting Subbase The subbase mounts horizontally. IMPORTANT • When using remote room temperature and humidity sensors, thermostat...
... thermostat from the wall and drill two 3/ 16 in. (4.8 mm) holes in . Position and level the subbase. The thermostat functions properly when not level. 2. Position the subbase over the holes, pulling wires through the wiring opening. 6. Mounting the subbase. then remove the top. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Mounting Subbase The subbase mounts horizontally. IMPORTANT • When using remote room temperature and humidity sensors, thermostat...
Installation Instructions
Page 3
... Fan On Fan Offa scheduled Occupied periods. Off: Heating, cooling, and fan are 0 or 40 seconds. Em Heat: Auxiliary heat serves as first stage. Auto: Fan always cycles with call for the default temperature setpoints. NOTES: Fan operation can extend (delay Off) after the heating/cooling turns off . - T7351 Intelligent™ Fan ON control logic Occupancy Call for typical hookups. Refer to pre- Securely tighten each terminal for identification. Cool: Thermostat controls cooling. - Setting Temperature Refer to change settings. plenum switch) controls fan operation...
... Fan On Fan Offa scheduled Occupied periods. Off: Heating, cooling, and fan are 0 or 40 seconds. Em Heat: Auxiliary heat serves as first stage. Auto: Fan always cycles with call for the default temperature setpoints. NOTES: Fan operation can extend (delay Off) after the heating/cooling turns off . - T7351 Intelligent™ Fan ON control logic Occupancy Call for typical hookups. Refer to pre- Securely tighten each terminal for identification. Cool: Thermostat controls cooling. - Setting Temperature Refer to change settings. plenum switch) controls fan operation...
Installation Instructions
Page 4
... key locations. Table 2. Display prompts SAV CFG (save the new configuration, use the Installer Setup feature: 1. a. Text Default Choices DEGREES 0 0 -1 CLOCK 0 0 - 1 KEYLOCK 0 0 - 3 Table 3. 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. NOTE: When power is first applied to specific systems 3. NOTE: Pressing...
... key locations. Table 2. Display prompts SAV CFG (save the new configuration, use the Installer Setup feature: 1. a. Text Default Choices DEGREES 0 0 -1 CLOCK 0 0 - 1 KEYLOCK 0 0 - 3 Table 3. 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. NOTE: When power is first applied to specific systems 3. NOTE: Pressing...
Installation Instructions
Page 5
... 1 means that by pressing the override button a second time the thermostat can return to the unoccupied period.) Outdoor Air Sensor Selection 0: None 1: Remote Outdoor Air Sensor Discharge Air Sensor Selection 0: None 1: Remote Discharge Air Sensor Room Humidity Sensor selection 0: None 1: On Board Sensor 2: Remote Sensor Occupancy Sensor Selection 0: None 1: Remote Occ Sensor Fan Operation on Heat 0: Conventional (Equipment controls Fan) 1: Electric (Thermostat turns on Fan with call for Heat) Extended Fan on Heat NO: None YES: 90 seconds Extended Fan on call for cool) 2: Heat Pump...
... 1 means that by pressing the override button a second time the thermostat can return to the unoccupied period.) Outdoor Air Sensor Selection 0: None 1: Remote Outdoor Air Sensor Discharge Air Sensor Selection 0: None 1: Remote Discharge Air Sensor Room Humidity Sensor selection 0: None 1: On Board Sensor 2: Remote Sensor Occupancy Sensor Selection 0: None 1: Remote Occ Sensor Fan Operation on Heat 0: Conventional (Equipment controls Fan) 1: Electric (Thermostat turns on Fan with call for Heat) Extended Fan on Heat NO: None YES: 90 seconds Extended Fan on call for cool) 2: Heat Pump...
Installation Instructions
Page 6
...: Enabled Discharge High Temperature Limit (Display only if Discharge Sensor is configured) Dehumidification 0: None 1: MinOn Time 2: Reset Temp Setpoint 3: Reset w/ MinOn 4: Reheat 5: Reheat w/ Min On Dehumidify Minutes On Dehumidify Temp Reset Minimum Heat Recovery Ramp Rate Maximum Heat Recovery Ramp Rate (Only Displayed if Outdoor Sensor is Selected) Minimum Heat Outdoor Air Temperature (Only Displayed if Outdoor Sensor is Selected) Maximum Heat Outdoor Air Temperature (Only Displayed if Outdoor Sensor is Selected) Minimum Cool Recovery Ramp Rate MAXCLRT...
...: Enabled Discharge High Temperature Limit (Display only if Discharge Sensor is configured) Dehumidification 0: None 1: MinOn Time 2: Reset Temp Setpoint 3: Reset w/ MinOn 4: Reheat 5: Reheat w/ Min On Dehumidify Minutes On Dehumidify Temp Reset Minimum Heat Recovery Ramp Rate Maximum Heat Recovery Ramp Rate (Only Displayed if Outdoor Sensor is Selected) Minimum Heat Outdoor Air Temperature (Only Displayed if Outdoor Sensor is Selected) Maximum Heat Outdoor Air Temperature (Only Displayed if Outdoor Sensor is Selected) Minimum Cool Recovery Ramp Rate MAXCLRT...
Installation Instructions
Page 7
... can be configured to schedule up to set the date: 1. Day Clock The T7351can be set), cycles through setup options. Use the Up/Down keys to 10 separate holidays, each with a duration of Month 33 = First Sunday etc... Press the "Temporary Occupied" and Temporary Not Occupied" keys simultaneously. 2. T7351 Key Function Summary. To enable this function, the user must set the duration. Use the Up...
... can be configured to schedule up to set the date: 1. Day Clock The T7351can be set), cycles through setup options. Use the Up/Down keys to 10 separate holidays, each with a duration of Month 33 = First Sunday etc... Press the "Temporary Occupied" and Temporary Not Occupied" keys simultaneously. 2. T7351 Key Function Summary. To enable this function, the user must set the duration. Use the Up...
Installation Instructions
Page 8
...: when returning from setting clock/day. - b. Press Run Schedule. 62-0258-05 8 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Grouping Temperature Set Override Schedule Table 5. Tapping key with copy key.) Occupied Not Occupied Clear Start Time Selects occupied event start time for all configuration, parameters, setpoints and schedules. Clears start times for heat or cool. To restore the factory schedule, press up or down until the display indicates YES. Sets Not Occupied Heat setpoint. Auto: Fan cycles with "Set Value" segment on increases current day (same...
...: when returning from setting clock/day. - b. Press Run Schedule. 62-0258-05 8 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Grouping Temperature Set Override Schedule Table 5. Tapping key with copy key.) Occupied Not Occupied Clear Start Time Selects occupied event start time for all configuration, parameters, setpoints and schedules. Clears start times for heat or cool. To restore the factory schedule, press up or down until the display indicates YES. Sets Not Occupied Heat setpoint. Auto: Fan cycles with "Set Value" segment on increases current day (same...
Installation Instructions
Page 9
... display indicates YES. b. The display gives the option to revert to check the thermostat configurations and operation. These methods operate only during typical off time for compressors is on time (normally 3 minutes) by running the heat at the same time. Hot Gas Bypass Dehumidification. Hysteresis and a minimum timer prevent short cycling of 10 to 15 minutes. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Test Mode (Occupied/Not Occupied/ Schedule Day) CAUTION Possible Equipment Damage. Press Run Schedule...
... display indicates YES. b. The display gives the option to revert to check the thermostat configurations and operation. These methods operate only during typical off time for compressors is on time (normally 3 minutes) by running the heat at the same time. Hot Gas Bypass Dehumidification. Hysteresis and a minimum timer prevent short cycling of 10 to 15 minutes. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Test Mode (Occupied/Not Occupied/ Schedule Day) CAUTION Possible Equipment Damage. Press Run Schedule...
Installation Instructions
Page 10
... one De-energized Low one or less De-energized Auxiliary output during call for multiple cooling stages for two reasons: 1. Table 6. This method assumes that the cooling provides dehumidification. 2. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Dehumid Hot Gas BP The auxiliary output operates as shown in Table 6. Hysteresis and a minimum timer prevent short cycling of this output. 62-0258-05 10 Multiple cooling stages probably provide necessary...
... one De-energized Low one or less De-energized Auxiliary output during call for multiple cooling stages for two reasons: 1. Table 6. This method assumes that the cooling provides dehumidification. 2. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Dehumid Hot Gas BP The auxiliary output operates as shown in Table 6. Hysteresis and a minimum timer prevent short cycling of this output. 62-0258-05 10 Multiple cooling stages probably provide necessary...
Installation Instructions
Page 11
...-stage heat and two-stage cool heat pump system with two transformers. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER. 3 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS. 4 WHEN USING THE TR23-H FOR HUMIDITY SENSING, THERE IS NO NEED TO WIRE THE HC TERMINAL BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1 COMMON AT THE SENSOR...
...-stage heat and two-stage cool heat pump system with two transformers. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER. 3 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS. 4 WHEN USING THE TR23-H FOR HUMIDITY SENSING, THERE IS NO NEED TO WIRE THE HC TERMINAL BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1 COMMON AT THE SENSOR...
Installation Instructions
Page 12
... REQUIRE THE FACTORY-INSTALLED JUMPER. 4 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS. 5 WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1 COMMON AT THE SENSOR. TROUBLESHOOTING GUIDE (TABLE 7) Table 7. Replace broken wires and tighten loose connections. Press both Run Schedule and Copy, then reconfigure the display. Remote temperature sensing is locked. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT GND SENSOR SET PT...
... REQUIRE THE FACTORY-INSTALLED JUMPER. 4 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS. 5 WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1 COMMON AT THE SENSOR. TROUBLESHOOTING GUIDE (TABLE 7) Table 7. Replace broken wires and tighten loose connections. Press both Run Schedule and Copy, then reconfigure the display. Remote temperature sensing is locked. T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT GND SENSOR SET PT...
Installation Instructions
Page 13
... HVAC equipment power switch is present, proceed with troubleshooting. Thermostat minimum off • Wait up to Cool or Auto. time is blown; With no display of heating or cooling equipment in the Off position; Verify operation of stage indicators, no warm or cool air is blown; if so, set to respond. Check for the system to the On position. • Check wiring between X and RH terminals. if so, reset circuit...
... HVAC equipment power switch is present, proceed with troubleshooting. Thermostat minimum off • Wait up to Cool or Auto. time is blown; With no display of heating or cooling equipment in the Off position; Verify operation of stage indicators, no warm or cool air is blown; if so, set to respond. Check for the system to the On position. • Check wiring between X and RH terminals. if so, reset circuit...
Installation Instructions
Page 14
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 62-0258-05 14
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 62-0258-05 14
Installation Instructions
Page 15
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 15 62-0258-05
T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 15 62-0258-05
Installation Instructions
Page 16
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. Registered Trademark © 2010 Honeywell International Inc. 62-0258-05 M.S. Rev. 09-10 Printed in U.S.A.
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. Registered Trademark © 2010 Honeywell International Inc. 62-0258-05 M.S. Rev. 09-10 Printed in U.S.A.
