Installation Instructions
Contents
1. MINCOOL 45 F 45 99 F Min Cool Setpoint 7 C 7 37 C MAXHEAT 90 F 40 90 F Max Heat Setpoint 32 C 4 32 HEATLCK NO YES or NO Heating Lockout Only displayed if Outdoor Air Sensor is selected NO None YES Enabled HTLCKSP 70 F 40 120 F Heating Lockout Temperature 21 C 40 49 F Display only if Remote Outdoor Air Sensor is configured COOLLCK NO YES or NO Cooling Lockout Only displayed if Outdoor Air Sensor is Selected NO None YES Enabled CLLCKSP 35 F 40 120 F Cooling Lockout Temperature 2 C 40 49 C Display only if Remote Outdoor Air Sensor is configured DAT LL NO YES or NO Discharge Low Limit Only displayed if Discharge Air Sensor is Selected NO None YES Enabled DATLLSP 45 F 35 60 F Discharge Low Temp Limit 7 C 2 16 C Display only if Discharge Sensor is configured DAT HL NO YES or NO Discharge High Limit Only displayed if Discharge Air Sensor is Selected NO None YES Enabled DATHLSP 110 F 65 140 F Discharge High Temperature Limit 43 C 18 60 C Display only if Discharge Sensor is configured DEHUMID 0 0 5 Dehumidification 0 None 1 MinOn Time 2 Reset Temp Setpoint 3 Reset w MinOn 4 Reheat 5 Reheat w Min On DEHMIN 5 5 15 Dehumidify Minutes On DEH TMP 2 1 5 Dehumidify Temp Reset MINHTRT 5 0 20 DDF HR Minimum Heat Recovery Ramp Rate MA2. Fast 9 cph 3 Super Fast 20 cph CL RESP JO 0 Standard 3 cph 1 Fast 4 cph Holidays and 365 Day Clock The T7351can be configured to schedule up to 10 separate holidays each with a duration of up to 99 days To enable this function the user must set the date 1 Press Set Day and Set Time keys simultaneously 2 Use the Up Down keys to set the date to YES then press the key 3 Use the Up Down keys to set the month then press the key 4 Use the Up Down keys to set the day then press the key See Table 4 for valid day choices 5 Use the Up Down keys to set the year then press Holidays can be set in the following manner Press the Temporary Occupied and Temporary Not Occupied keys simultaneously The month MON of the first holiday is then dis played 00 means the holiday is ignored Use the Up Down keys to set the month then press 1 2 3 4 5 the key Use the Up Down keys to set the day then press the key see Table 4 for valid day choices Use the Up Down keys to set the duration The first holiday is now set and pressing the key will take you to programming the second holiday denoted by the key the number 2 on the screen Table 4 Valid Day Values Value Description Value Description Value Description Value Description 1t0 31 Day of month 42 Sec
3. are used to set current time and day program times and setpoints for heating and cooling override the program temperatures display present setting set system and fan operation NOTE See Fig 5 for keypad information T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Setting Temperature Refer to Table 2 for the default temperature setpoints To set the Occupied and Not Occupied Heat and Cool setpoints simply press the Heat and Cool button under the Occupied or Not Occupied area of the keypad To set the Standby Heat setpoint press both the Occupied and Not Occupied Heat buttons simultaneous To set the Standby Cool setpoint press the Occupied Cool and Not Occupied Heat buttons simultaneously Setting System and Fan System default setting is Auto Fan default setting is On NOTE Use System and Fan keys to change settings System Settings Auto Thermostat automatically changes between heating and cooling based on indoor temperature Cool Thermostat controls cooling Off Heating cooling and fan are all off Heat Thermostat controls heating Em Heat Auxiliary heat serves as first stage Compressor stages are locked off Fan Settings On See Table 1 Auto Fan always cycles with call for heat or cool Conventional The equipment i e plenum switch controls fan operation in heat mode Thermostat controls fan operation in cool mode Electric Heat Thermostat controls fan operation
4. 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 te
5. in both heat and cool modes NOTES Fan operation can extend delay Off after the heating cooling turns off Heating choices are 0 or 90 seconds Cooling choices are 0 or 40 seconds Table 1 T7351 Intelligent Fan ON control logic Occupancy Effective Occupancy Scheduled Period Motion Sensor Signal Occupied No Sensor Wired Occupied Fan On Call for Heat Cool Occupied Motion Sensed Occupied Fan On Occupied No Motion Sensed Standby Fan On Not Occupied No Sensor Wired Not Occupied Fan On Effective Occupancy is Standby Standby setpoints are used and it assumes that the space is unoccupied Fan is on only when there is a call for heating or cooling Occupancy sensor will only be active during Not Occupied Motion Sensed Not Occupied Fan On scheduled Occupied periods During scheduled Not Occupied periods the effective occupancy Not Occupied No Motion Sensed Not Occupied Fan On will always be Not Occupied n heat mode when set for conventional heat the equipment i e plenum switch could power the fan despite the T7350 3 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Temperature P Occupied 4A HEAT CooL HEAT COOL Not Occupied ha Override Temporary Temporary Day Time Occupied Not Occupied Set Day Time amp Lo Cx J Lo Cx 0 o to 1 Schedule Cheat Day Occupied Not Occupied Start T
6. time is activated Wait up to five minutes for the system to respond Configure heating response System selection is set to Off or Cool Set system selection to Heat or Auto Cooling will not come on No power to the thermostat Check that X terminal is connected to the system transformer Check for 24 Vac between X and RH terminals If missing 24 Vac Check if circuit breaker is tripped if so reset circuit breaker Check if system fuse is blown if so replace fuse e Check if the HVAC equipment power switch is in the Off position if so set to the On position Check wiring between thermostat and HVAC equipment Replace broken wires and tighten loose connections If 24 Vac is present proceed with troubleshooting Thermostat minimum off time is activated Wait up to five minutes for the system to respond Configure cooling response System selection is set to Off or Heat Set system selection to Cool or Auto System indicator flame heat snowflake cool is displayed but no warm or cool air is coming from the registers The call for heat or cool is not yet given Check if any stage indicators dots next to the system indicator are displayed With no display of stage indicators no call for cool heat is yet given Conventional heating equipment turns the fan on only after the furnace has warmed to a setpoint Wait one minute after seeing the on indicat
7. Honeywell 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 DEN Installing this Product 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 N CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply
8. ITH ONE TRANSFORMER REQUIRE THE FACTORY INSTALLED JUMPER A USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS 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 M29255 Fig 9 Typical hookup of T7351F2010 in three stage heat and three stage cool conventional system with one transformer TROUBLESHOOTING GUIDE TABLE 7 settings will not change Example Cannot set heating higher or cooling lower limits were reached Table 7 Troubleshooting Information Symptom Possible Cause Action Display will not Thermostat is not being Check that X terminal is connected to the system transformer come on powered Check for 24 Vac between X and RH terminals If missing 24 Vac Check if circuit breaker is tripped if so reset circuit breaker Check if system fuse is blown if so replace fuse Checkif the HVAC equipment power switch is in the Off position if SO set to the On position Check wiring between thermostat and HVAC equipment Replace broken wires and tighten loose connections If 24 Vac is present proceed with troubleshooting Temperature Thermostat is configured Press both Run Schedule and Copy then reconfigure the display display is for F or C display incorrect Bad thermostat location Relocate the thermostat Display shows three T7351 is set for
9. ONS A 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 M29323 Fig 7 Typical hookup of T7351F2010 in two stage heat and two stage cool heat pump system with two transformers TR23 H REMOTE SENSOR 4 ul 2j Is 4 s e v a o 9 25 oo 112 m my HUMIDITY SENSOR A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD A HEAT COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY INSTALLED JUMPER A USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS A 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 M29254 Fig 8 Typical hookup of T7351F2010 in two stage heat and four stage cool conventional system 11 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT TR23 H REMOTE SENSOR PIE T HUMIDITY y SENSOR OUTDOOR AIR SENSOR COMPRESSOR CONTACTOR 2 DISCHARGE AIR SENSOR COMPRESSOR CONTACTOR 3 A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD A HEAT COOL SYSTEMS W
10. XHTRT 8 0 20 DDF HR Maximum Heat Recovery Ramp Rate Only Displayed if Outdoor Sensor is Selected MINHTOA 0 F 20 120 F Minimum Heat Outdoor Air Temperature Only Displayed if Outdoor Sensor is 18 29 49 C Selected C MAXHTOA 40 F 20 120 F Maximum Heat Outdoor Air Temperature Only Displayed if Outdoor Sensor is 4 C 29 49 C Selected MINCLRT 3 0 20 DDF HR Minimum Cool Recovery Ramp Rate MAXCLRT 6 0 20 DDF HR Maximum Cool Recovery Ramp Rate Only Displayed if Outdoor Sensor is Selected MINCLOA 90 F 20 120 F Minimum Cool Outdoor Air Temperature Only Displayed if Outdoor Sensor is 32 C 29 49 C Selected MAXCLOA 70 F 20 120 F Maximum Cool Outdoor Air Temperature Only Displayed if Outdoor Sensor is 21 C 29 49 C Selected 62 0258 05 6 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 33 First Sunday etc 0 31 Day of Month 32 Last Day of Month DSTMONZ2 11 0 12 DLS Fall Month DSTDAY2 0 31 32 74 DLS Fall Day 33 First Sunday etc 0 31 Day of Month 32 Last Day of Month HT RESP 1 0 Standard 3 cph 1 Medium 6 cph 2
11. ble for 30 seconds after power up 2 To advance to the next Installer Setup number press NOTE Pressing Run Copy again while in this mode displays the T7351 firmware version number 3 Toreturn to a Setup item cycle through the options 4 To change a setting use the up 4 or down w key 5 Toexitthe Installer Setup press Run Schedule 6 Display prompts SAV CFG save configuration a If you want to save the new configuration use the up 4 ordown w key to change NO to YES before pressing Run Schedule b If you want the configuration to remain as it was before starting this change ensure the display indicates SAV CFG NO and press Run Schedule NOTE Installer Setup is automatically exited after five minutes with no key pressed Upon this auto matic exit all changes are lost Configuration Configuration can be done with the keypad using the Installer Setup ISU Table 3 Installer Setup Text Default Choices Notes DEGREES 0 0 1 Degree Temperature Format 0 Degrees F 1 Degrees C CLOCK 0 0 1 Clock Display Format 0 12 hour 1 24 hour KEYLOCK 0 0 3 Keypad Lockout Level 0 None 1 Lockout all keys except Set Day Set Time Set Date Set Holidays Temporary Occupied Temporary Not Occupied System Fan Up Down and Information 2 Lockout all keys except Set Day Set Time Set Date Set Holidays Temporary Occupied Temporary Not Occupied Up Down and Information 3 Lockout all keys excep
12. ed action Holiday and or Temporary setpoint changes On Continuous fan operation during occupied periods During not occupied periods and in standby mode when no motion is sensed fan cycles with call for heat or cool Auto Fan cycles with call for heat or cool during all periods See Product Data Sheet form 63 2605 for more details NOTES The display returns to default screen after pressing Run Schedule or after a period of time without keypress 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 requires device reconfiguration 1 Press both Run Schedule and Clear Start Time 2 The display gives the option to revert to FAC CFG a Torestore the factory defaults press up 4 or down until the display indicates YES b To cancel this option ensure the display indicates NO 62 0258 05 ten seconds when returning from temporary setpoint changes info screen temp occ and temp not occ one minute when returning from setting clock day ten minutes when returning from System Checkout five minutes when returning from all other modes 3 Press Run Schedule Get Factory Schedule Info Clear Performing this operation reverts the schedules to the factory defaults 1 Press both nfo and Clear Start Time 2 The display gives the op
13. ied and the LED will light up and the temporary occupied timer will begin If the button is pressed again the timer will restart Bypass 1 means that by pressing the override button a second time the thermostat can return to the unoccupied period OATSENS Outdoor Air Sensor Selection 0 None 1 Remote Outdoor Air Sensor DATSENS Discharge Air Sensor Selection 0 None 1 Remote Discharge Air Sensor HUMSENS Room Humidity Sensor selection 0 None 1 On Board Sensor 2 Remote Sensor OCCSENS Occupancy Sensor Selection 0 None 1 Remote Occ Sensor FAN HT Fan Operation on Heat 0 Conventional Equipment controls Fan 1 Electric Thermostat turns on Fan with call for Heat XFAN HT YES YES or NO Extended Fan on Heat NO None YES 90 seconds XFAN CL YES or NO Extended Fan on Cool NO None YES 40 seconds STRTDEL 0 15 Sequential Start Delay 0 to 150 seconds in 10 second increments ADVANCE YES or NO Advanced Settings NO Hide YES Show 5 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3 Installer Setup Continued Text Default Choices Notes TMP LIM 13 0 5 Temporary Setpoint Adjustment 0 0 Deg F 1 1 Deg 2 2 Deg 3 3 Deg 4 4 Deg 5 5 Deg Cnmun r un TMP OCC 3 1 8 Temporary Occupied Duration 1 to 8 hours TMP CAL 0 4 3 Temporary Display Adjustment 0 3 0to 3 DDF 4 7 4to 1 DDF
14. ime System Fan Run Copy HEAT COOL ON AUTO Schedule Co C4 fh 8 3 aj b Le Lo Fig 5 Thermostat key locations 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 Control Occupied Not Occupied 70 F 21 C 55 F 13 C Standby Heating 67 F 19 C Cooling 75 F 24 C 85 F 29 C 78 F 26 C Temporary Standby BEN Not Occupied12 StartTime IH 1 4C T BR ER EEN Be 1 LU LOS sane MonTueWedThuFriSatSunHol MinsDays yst Em Heat 0 3 Off CoolAuto Dehumid OnAuto M19611 RIETI Room Fig 6 LCD display of all segments N CAUTION Possible Equipment Damage Fan must be running when system is operating Heat pump and electric heat systems must be configured correctly to prevent equipment damage caused by the system running without the fan Setup Using Keypad The installer uses the Installer Setup to customize the thermostat to specific systems A combination of key presses are required to use the Installer Setup feature 1 To enter the Installer Setup press and hold both the Run Schedule and the Copy keys until DEGREES 00 or DEGREES 01 displays NOTE Installer Setup will display WAIT and is unavaila
15. inition Temperature Occupied gt Sets Occupied Heat setpoint Heat AT 6 4 Occupied gt Sets Occupied Cool setpoint N Cool Tit a Not Sets Not Occupied Heat setpoint Occupied ta Heat Not Sets Not Occupied Cool setpoint Occupied CH Cool Set Day m Sets day of week Tapping key with Set Value segment on increases current day same effect as Up Arrow key amp Time Sets time Tapping key with Set Value segment on increases time in one e hour increments Override Temporary O Temporary occupied setting for length of time defined by installer User can Occupied modify setpoints F Temporary Not CD Sets holiday length User selects number of days 0 99 or for Occupied continuous override Schedule Day o Selects day schedule to modify Used also with copy key Occupied Selects occupied event start times for specified day Repeatedly press this key to toggle between two occupied events Not Occupied 4 Selects not occupied event start times for specified day Repeatedly press this key to toggle between two not occupied events Clear Start Time R Clears start time for specified period and day e Copy Copies schedule from one day to another System X Selects System Mode Toggles through Em Heat Heat Off Cool and Auto Fan Selects fan operation mode Toggles between On and Auto Run Schedule Resumes running schedule cancels Temporary Occupi
16. ly insert the mounting screws into the holes Tighten mounting screws SUBBASE M29184 Fig 2 Four TR21 Sensors providing temperature averaging network for T7351 Thermostat 62 0258 05 WIRES THROUGH WALL MOUNTING 0 MOUNTING SCREWS M19608 Fig 3 Mounting the subbase Mounting Thermostat on Subbase Fig 4 With the subbase installed mount the thermostat 1 Engage top subbase tabs into the thermostat top 2 Swing the thermostat down 3 Press the lower edge of the case to latch NOTE To remove the thermostat from the wall first pull out at the bottom of the thermostat then remove the top A ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE M19609 Fig 4 Mounting thermostat on subbase Wiring Follow equipment manufacturer wiring instructions when available Refer to the Wiring Diagram section for typical hookups A letter code is located near each terminal for identification IMPORTANT All wiring must comply with local electrical codes and ordinances NOTE Maximum and recommended wire size is 18 gauge Do not use wire smaller than 22 gauge 1 Loosen subbase terminal screws and connect sys tem wires 2 Securely tighten each terminal screw 3 Push excess wire back into the hole in the wall 4 Plug the hole with nonflammable insulation to pre vent drafts from affecting the thermostat SETTINGS Using Thermostat Keys The thermostat keys
17. me can be set within the range of 5 to 15 minutes Hysteresis and a minimum timer are used to ensure this behavior does not change with every equipment cycle Reheat Dehumidifies by operating cooling during typical off time The T7351 maintains the proper setpoint by running the heat at the same time IMPORTANT At times during Reheat dehumidification the T7351 operates heating and the cooling simulta neously This is normal NOTES The heat stage never energizes during Reheat if more than one cool stage is on _ Reheat mode cannot occur during heating Reset Temp SetPt The room temperature set point resets to a specified number of degrees below the actual set point when room relative humidity RH rises above humidity high limit set point Though this may not technically reduce relative humidity in the room it reduces the dew point to provide the customer with a sense of comfort due to a lower temperature setting in the room As long as RH stays above humidity high limit set point this set point is maintained NOTE Hysteresis and a minimum timer prevent the set point from short interval alternation between standard and reset set points Options Utilizing Auxiliary Output There are two dehumidification options that utilize the auxiliary output They are Simple Dehumidification Hot Gas Bypass Dehumidification Simple Dehumid ification The auxiliary output Energizes when RH rises ab
18. mperature averaging Fig 1 Typical location of thermostat or remote mounted sensor MIN NIMM 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Mounting Subbase The subbase mounts horizontally IMPORTANT When using the internal temperature or humidity sensor the device must be mounted horizontally with the LCD facing upwards Precise leveling is not needed When using remote room temperature and humidity sensors thermostat mounting orienta tion does not matter Wall mounting using standard drywall screws is standard Mounting to a 2 in by 4 in 50 8 mm by 101 6 mm wiring box can be accomplished for a horizontal box no extra hardware is required for a vertical box part 2096514 is required Mount to European standard wall box having 2 4 in 60 3 mm between mounting screws in a horizontal line with or without adaptive hardware 1 Position and level the subbase NOTE Alevel wallplate is only for appearance The thermostat functions properly when not level 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 Position the subbase over the holes pulling wires through the wiring opening Loose
19. n Getting the user schedule restores the schedule including holidays from saved memory overwriting the schedule currently in use 1 Press both Run Schedule and Info 2 The display gives the option to GET SHD a To retrieve the saved schedule press up or down until the display indicates YES b To cancel this option ensure display indicates NO 3 Press Run Schedule DEHUMIDIFICATION There are five methods through which the T7351 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 NOTE The dehumidification high limit can be set within the range of 10 to 90 percent relative humidity Control Through Cooling Configure using some combination of the following Minimum On Reheat Reset T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT NOTES _ These methods operate only during cooling Selecting both Reheat and Reset options can cause frequent setpoint adjustments This selection is not recommended Min ON Time Dehumidifies by increasing the compressor minimum on time normally 3 minutes by a programmable amount This is useful with oversized systems in that it forces the coils to cool to a point where dehumidification can occur NOTES Can force wider temperature swings by cool ing when setpoint control does not require it The minimum on ti
20. ond Tuesday 53 Third Saturday 64 Fifth Wednesday 32 Last Day of Month 43 Second Wednesday 54 Fourth Sunday 65 Fifth Thursday 33 First Sunday 44 Second Thursday 55 Fourth Monday 66 Fifth Friday 34 First Monday 45 Second Friday 56 Fourth Tuesday 67 Fifth Saturday 35 First Tuesday 46 Second Saturday 57 Fourth Wednesday 68 Last Sunday 36 First Wednesday 47 Third Sunday 58 Fourth Thursday 69 Last Monday 37 First Thursday 48 Third Monday 59 Fourth Friday 70 Last Tuesday 38 First Friday 49 Third Tuesday 60 Fourth Saturday 71 Last Wednesday 39 First Saturday 50 Third Wednesday 61 Fifth Sunday 72 Last Thursday 40 Second Sunday 51 Third Thursday 62 Fifth Monday 73 Last Friday 41 Second Monday 52 Third Friday 63 Fifth Tuesday 74 Last Saturday Table 5 T7351 Key Function Summary Grouping Button Definition Information Down Arrow w 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 Information e Obtains information where humidity high limit can be set cycles through setup options Up Arrow a Raises setpoint day or time When setting times or temperatures hold key down to continuously increase value Also can make temporary change in temperature setpoint 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 5 T7351 Key Function Summary Continued Grouping Button Def
21. or and then check the registers Heating or cooling equipment is not operating Verify operation of heating or cooling equipment in self test 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 15 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Automation and Control Solutions Honeywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 Honeywell Limited Honeywell Limit e 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 Honeywell
22. ove humidity high limit De energizes when RH drops below humidity high limit NOTES Hysteresis and a minimum timer prevent short cycling of this output Unlike Dehumid Hot Gas BP the relay remains energized during calls for multiple cooling stages 9 62 0258 05 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Dehumid Hot Gas BP Auxiliary output during call for multiple cooling stages for ili i two reasons Th l tput t h Table 6 ree tan aa ac IND 1 This method assumes that the cooling provides dehumidification Table 9 Hot Gas Bypass Dehumidificatlon Logic 2 Multiple cooling stages probably provide necessary Humidity Cooling Stages Active Auxiliary Output dehumidification High morethanone De enerzed 3 Hysteresis and a minimum timer prevent short cycling of this output High one or less Energized Low more than one De energized Low one or less De energized 62 0258 05 10 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT WIRING DIAGRAMS TR23 H REMOTE SENSOR a a o 2 e N 1 213 4 I5 Te T7 T8 T9 QD z m a 2 SUBBASE T6 AA HUMIDITY SENSOR HEATING COOLING TRANSFORMER TRANSFORMER A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS REMOVE THE FACTORY INSTALLED JUMPER A USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTI
23. remote sensing and sensor is missing or circuit is dashes and a degree sign either open or shorted all systems shut down Temperature Upper or lower temperature 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 Check setpoint stops If necessary reconfigure the stop s Keypad is locked When a locked key is pressed LOCKED appears momentarily on the LCD Press both Run Schedule and Copy then change keypad lock level Room temperature is out of control Remote temperature sensing is not working Check all remote sensors 62 0258 05 12 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 7 Troubleshooting Information Continued Symptom Heat will not come on Possible Cause No power to the thermostat Action Check that X terminal is connected to the system transformer Check for 24 Vac between X and RH terminals If missing 24 Vac Check if circuit breaker is tripped if so reset circuit breaker Check if system fuse is blown if so replace fuse e Check if the HVAC equipment power switch is in the Off position if so set to the On position Check wiring between thermostat and HVAC equipment Replace broken wires and tighten loose connections If 24 Vac is present proceed with troubleshooting Thermostat minimum off
24. t Information 62 0258 05 4 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3 Installer Setup Continued Text HEATPMP Default 0 Choices 0 2 Notes 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 Number of Cooling Stages 0 0 Stages of Cooling 1 1 Stages of Cooling 2 2 Stages of Cooling 3 3 Stages of Cooling Not available if Heat Pump is selected 4 4 Stages of Cooling W3 will be used as 4th stage relay Not available if Heat Pump is selected HEATSTG Number of Heating Stages Not available if Heat Pump is selected 0 0 Stages of Heating 1 1 Stages of Heating 2 2 Stages of Heating This is the max if 4 cooling stages is selected 3 3 Stages of Heating AUX STG Number of Heat Pump Heating Stages Only shown when Heat Pump is selected 0 0 Aux Stages 1 1 Aux Stages 2 2 Aux Stages AUX CON Aux Contact Functionality 0 Time of Day 1 Economizer 2 Dehumid Hot Gas Bypass 3 Simple Dehumid WALLMOD Remote Room Sensor Selection 0 Local sensor only 1 TR21 TR24 and T7770A D Remote Sensor No Remote Setpoint Bypass 0 2 TR22 TR23 and T7770B C Remote Sensor Remote Setpoint Bypass 0 3 T7771 Remote sensor Remote Setpoint Bypass 1 Bypass 0 means that by pressing the override button the thermostat goes from unoccupied to occup
25. tion to revert to FAC SCH a Torestore the factory schedule press up 4 or down until the display indicates YES b To cancel this option ensure display indicates NO 3 Press Run Schedule Test Mode Occupied Not Occupied Schedule Day N CAUTION Possible Equipment Damage Equipment damage can result if compressor is cycled too quickly The minimum off time for compressors is bypassed during Test Mode Equipment damage can occur if the compressor is cycled too quickly Use the Test Mode to check the thermostat configurations and operation To start the system test 1 Press Schedule Day Occupied and Not Occupied simultaneously 2 The display gives the option to TEST a To enter test mode press up or down v until the display indicates IN TEST b To cancel this option ensure display indicates NO TEST 3 Press Run Schedule NOTES To verify whether or not the system test is still active repeat the above process The system test times out after ten minutes with no key pressed Save User Schedule Info Copy Performing this operation saves the current schedule including holidays to memory overwriting the old saved schedule 1 Press both nfo and Copy 2 The display gives the option to revert to SAV SHD a To save the current schedule press up 4 or down until the display indicates YES b To cancel this option ensure display indicates NO 3 Press Run Schedule Get User Schedule Info Ru
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