Honeywell 63-2666-03 Thermostat User Manual
Contents
1. Conventional Stage 3 cooling relay HS HS Humidity Sensor connection signal 0 10 Vdc TR23 H connection 11 HC HC Humidity Sensor connection common HP HP Humidity Sensor connection power TR23 H connection 12 M M Motion Sensor connection 1 M M Motion Sensor connection 2 a Factory jumper between RC and RH for systems with one transformer gt For changeover functional details see Operation section HC connection is not needed when using a TR23 H sensor Mounting Thermostat on Subbase Fig 7 With the subbase installed mount the thermostat Engage the tabs at the top of the thermostat and sub 1 base 2 Swing the thermostat down 63 2666 03 3 Press the lower edge of the case to latch NOTE Toremove 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 7 Mounting Thermostat on Subbase SETTING Using Thermostat Keys The thermostat keys 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 perform simple configuration NOTE Refer to Fig 8 for keypad information Setting Temperature Refer to Table 2 for the default temperature setpoints See Programming section for complete instructio2. 2013 Honeywell International Inc 63 2666 03 M S Rev 12 13 customer honeywell com Printed in United States
3. 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 63 2666 03 8 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 features 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 unavailable for 30 seconds after power up 2 To advance to the next Installer Setup number press e NOTE Pressing Run Copy again while in this mode displays the T7351 firmware version number To return to a Setup item cycle through the options To change a setting use the up or down w key To exit the Installer Setup press Run Schedule Display prompts SAV CFG save configuration Oo Pw T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT a If you want to save the new configuration use the up NOTE Installer Setup is automatically exited after five or down v 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 Configuration minutes with no key pressed Upon this auto
4. Check if any stage indicators dots next to the system indicator are displayed With no display of stage indicators no call for cool heat via relay is yet given Conventional heating equipment turns the fan on only after the furnace has warmed to a setpoint Heating or cooling equipment is not operating Wait one minute after seeing the on indicator and then check the registers Verify operation of heating or cooling equipment in Test Mode WIRING DIAGRAM FIGURES 14 AND 15 TR23 H REMOTE SENSOR OUTDOOR AIR DISCHARGE SENSOR COMPRESSOR CONTACTOR 2 HEAT Em RELAY 3 Em 2 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 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 M29255 Fig 14 Typical Hookup of T7351F2010 in Three Stage Heat and Three Stage Cool Conventional System with One Transformer 19 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT TR23 H REMOTE SENSOR DISCHARGE AIR SENSOR m m m HUMIDITY SENSOR A POWER SUPPLY PROVIDE DISCONNECT M
5. Information e pd als 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 Temperature Occupied eh Sets Occupied Heat setpoint i Sets Occupied Cool setpoint Cool T xs l d ee ar Sets Not Occupied Heat setpoint Not Occupied Sets Not Occupied Cool setpoint Cool ie Set Day Sets day of week Tapping key with Set Value segment on increases current day same d effect as Up Arrow key Time Sets time Tapping key with Set Value segment on increases time in one hour e increments Override babe Me occupied setting for length of time defined by installer User can modify ccupie setpoints F Leal Not mM Rei length User selects number of days 0 99 or for continuous Schedule Day t Selects day schedule to modify Used also with copy key fj Occupied at Selects occupied event start times for specified day Repeatedly press this key to toggle between two occupied events Not Occupied Selects not occupied event start times for specified day Repeatedly press this key to ar toggle between two not occupied events Clear Start Time K Clears start time for specified period and day Copy Copies schedule from one day to another System Selects System Mode Toggles t
6. 76 mm holes in the wall if drywall as marked For firmer material such as plaster or wood drill two 7 32 in 5 56 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 6 Loosely insert the mounting screws into the holes 7 Tighten mounting screws SUBBASE M29184 Fig 3 Four TR21 Sensors providing a Temperature Averaging Network for T7351 Thermostat T7350 SUBBASE SUBBASE Fig 5 Nine TR21 Sensors Providing a Temperature M29257 Averaging Network for T7351 Thermostat MOUNTING HOLES Fig 6 Mounting the Subbase MOUNTING SCREWS M19608 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Wiring N CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply before installation IMPORTANT All wiring must comply with local electrical codes and ordinances NOTE Maximum and recommended wire size is 18 gauge 1 02 mm Do not use wire smaller than 22 gauge o 0 644 mm 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 Refer to Tables 3 for terminal designations 1 Loosen subbase terminal screws and connect system wires Securely tighten each term
7. C below the not occupied setpoint 6 When the room temperature intersects this auxiliary heat ramp the second stage of auxiliary heat is enabled During the cool recovery period the setpoint changes at a rate in degrees per hour relative to the outdoor air temperature If there is no outdoor air temperature sensor available the minimum ramp rate is used See Fig 12 for the various setpoints NOTE For cooling the same method is used in both conventional and heat pump systems 15 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT NOTE The setpoint used during the cool recovery period is similar to the heat mode in Fig 10 except the slope of the line reverses for cooling COOL RECOVERY RAMP RATE DEGREES HOUR MaxClRamp MinClRamp OUTDOOR AIR TEMPERATURE OaTempMinClRamp OaTempMaxClRamp M10111A Fig 12 Setpoint Ramping Parameters with Ramp Rate Calculation Advantages e Comfort setting is achieved at the programmed time and maintained regardless of weather conditions occupants are comfortable e Drafts from low temperature discharge air are minimized during Occupied periods e Use of the more economical first stage of heat is maximized during recovery minimizing use of the expensive later heat stage s Comfort and energy savings can be achieved in both heating and cooling e Heat cycling reduced extending equipment life Auxiliary Relay The auxiliary relay can be used with a variety of con
8. Mounts on subbase Subbase Mounts On Wall Using two 5 8 in long 6 32 screws included Outlet Box Using sheet metal screws Clock Accuracy at 77 F 25 C 1 min month 30 days Minimum Stage Operation Time fixed Minimum On Heat 1 minutes Cool 3 minutes Minimum Off Cool and Heat Pump 1 minute Electrical Ratings Power 24 Vac 50 60 Hz 20 to 30 Vac 50 60 Hz Input Temperature 20K ohms Humidity 0 10 Vdc Outdoor 3000 PTC Discharge Air 20K ohms Occupancy Sensor Dry contact switching 30 Vdc at 1 mA All Relay Outputs at 30 Vac Running 1 5A maximum Inrush 7 5A maximum System Current Draw without load 5 VA maximum at 30 Vac 50 60 Hz NOTE Relays are N O Single Pole Single Throw SPST ORDERING INFORMATION Outdoor Sensor Wiring Requires 18 gauge wire Humidity Ratings 5 to 90 RH noncondensing Emergency Heat Indication Display indicates when Emergency Heat is activated Em Temperature Ratings Operating Ambient 30 to 110 F 1 to 43 C Shipping 30 to 150 F 34 to 66 C Display Accuracy 1 F x1 C Setpoint Range Heating 40 to 90 F 4 to 32 C Cooling 45 to 99 F 7 to 37 C Deadband 2 F 1 C Default Settings Refer to Table 2 Loss of Power The thermostat maintains programmed times and temperatures for the life of the product Clock and day information is retained for a minimum of 48 hours NOTE To a
9. 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 Fan Off Occupancy sensor will only be active during Not Occupied Motion Sensed Not Occupied Fan Off scheduled Occupied periods During scheduled Not Occupied periods the effective occupancy Not Occupied No Motion Sensed Not Occupied Fan Off Will always be Not Occupied a n heat mode when set for conventional heat the equipment i e plenum switch could power the fan despite the T7350 K Temperature i occupied LAF Not Occupied fte HEAT COOL HEAT COOL Set Day Time Override F Temporary Temporary Day Time Occupied Not Occupied Lo L ila Ce LO J LOJ LOJ LU cy Schedule Clear Day Occupied NotOccupied Start Time System Fan Run Copy HEAT COOL ON AUTO Schedule Lo it f amp CE Qj o 8 Co M19610 Fig 8 Thermostat Key Locations INSTALLER SETUP For most applications the thermostat factory settings do not need to be charged Review the factory settings in Table 2 NOTE When power is first applied to the thermostat the display will show all segments See Fig 9 Temporary Standby Set Schedule Not Occupied12 StartTime r1 rye i 3 AM tag EESEEEEA ALII Room MonTueWedThuFriSatSunHol i System Em Heat M19611 Fig 9 LCD Display of all Segments
10. Universal Versaguard Thermostat guards available Contents ApplicatioM nm 1 gu qc acta 1 Specifications sessssseeeenenennene 2 Ordering Information seen 2 SEn e 6 Installer Setup ssseeeeeenee 7 ienrI up T 12 Troubleshooting Guide Table 11 sssse 17 Wiring Diagram Figures 14 and 15 19 NN T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT SPECIFICATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances Therefore this unit might not exactly match listed specifications This product is tested and calibrated under closely controlled conditions minor performance differ ences can be expected if those conditions are Models See Table 1 Dimensions Refer to Fig 1 Finish color Trident White Batteries No batteries required changed Table 1 T7351 Thermostat Features Maximum Stages Auxiliary Model Application Heat Cool Features Relay T7351F Conventional or 3 2 3 4 Humidity Occupancy Yes Heat Pump Outdoor Discharge Air Capability a This model is down selectable and can be configured to control fewer stages than the maximum allowed gt Heat pump applications for this model have a maximum of two heat stages and two cool stages Mounting Means
11. the system test is still parameters setpoints and schedules To regain the active repeat the above process old requires device reconfiguration The system test times out after ten minutes with no key pressed 1 Press both Run Schedule and Clear Start Time 2 The display gives the option to revert to FAC CFG Save User Schedule Info Copy a Torestore the factory defaults press up 4 or Performing this operation saves the current schedule including down until the display indicates YES holidays to memory overwriting the old saved schedule b Tocancel this option ensure the display 1 Press both nfo and Copy indicates NO 2 The display gives the option to revert to SAV SHD 3 Press Run Schedule a To save the current schedule press up 4 or down until the display indicates YES Get Factory Schedule Info Clear b Tocancel this option ensure display indicates NO P Hi hedule Performing this operation reverts the schedules to the factory 3 fess up Schedule defaults Get User Schedule Info Run 1 Press both Info and Clear Start Time Getting the user schedule restores the schedule including 2 The display gives the option to revert to FAC SCH holidays from saved memory overwriting the schedule a Torestore the factory schedule press up 4 or currently in use down v until the display indicates YES 1 Press both Run Schedule and Info b Tocancel this option ensure display indicates NO 2 The display gives the option t
12. 9 49 C DayLight Savings options only display when Date is valid DSTMON1 3 0 12 DLS Spring Month DSTDAY1 40 0 31 32 74 DLS Spring Day 0 31 Day of Month 32 Last Day of Month 33 First Sunday etc DSTMON 11 0 12 DLS Fall Month DSTDAY2 33 0 31 32 74 DLS Fall Day 0 31 Day of Month 32 Last Day of Month 33 First Sunday etc HT RESP 1 0 3 0 Standard 3 cph 1 Medium 6 cph 2 Fast 9 cph 3 Super Fast 20 cph CL RESP 0 0 1 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 4 Use the Up Down keys to set the day then press the e key Refer to Table 4 for valid day choices 5 Use the Up Down keys to set the year then press the key Holidays can be set in the following manner 1 Press the Temporary Occupied and Temporary Not Occupied keys simultaneously 2 Usethe Up Down keys to set the date to YES then press 2 The month MON of the first holiday is then displayed the key 00 means the holiday is ignored 3 e us Up Down keys to set the month then press the 3 Use the Up Down keys to set the month then press the ey key 11 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 4 Use the Up Down keys to set the day then press th
13. E THERMOSTAT Table 5 Installer Setup Continued Text Default Choices Notes 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 DEH MIN 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 MAXHTRT 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 Selected 18 C 29 49 C MAXHTOA 40 F 20 120 F Maximum Heat Outdoor Air Temperature Only Displayed if Outdoor Sensor is Selected 4 C 29 49 C 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 Selected 32 C 29 49 C MAXCLOA 70 F 20 120 F Maximum Cool Outdoor Air Temperature Only Displayed if Outdoor Sensor is Selected 21 C 2
14. EANS 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 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 15 Typical Hookup of T7351F2010 in Two Stage Heat and Four Stage Cool Conventional System TR23 H REMOTE SENSOR COMPRESSOR CONTACTOR 2 AUX HEAT STAGE 1 2 HUMIDITY SENSOR E um um um um um COMPRESSOR CONTACTOR 1 Ne ECONOMIZER oe L1 E HOT HOT HEATING COOLING TRANSFORMER TRANSFORMER A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED VAN WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS REMOVE 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 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 16 Typical hookup of T7351F2010 in two stage heat and two stage cool heat pump system with two transformers Automation and Control Solutions Honeywell International Inc Honeywell 1985 Douglas Drive North U S Registered Trademark Golden Valley MN 55422
15. ES YES or NO Extended Fan on Heat NO None YES 90 seconds XFANCL NO YES or NO Extended Fan on Cool NO None YES 40 seconds STRTDEL 0 0 15 Sequential Start Delay 0 to 150 seconds in 10 second increments ADVANCE NO YES or NO Advanced Settings NO Hide YES Show TMP LIM 3 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 F 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 MINCOOL 45 F 45 99 F Min Cool Setpoint 7C 7 37 MAXHEAT 90 F 40 90 F Max Heat Setpoint 32 C 4 32 C 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 C 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 63 2666 03 10 T7351 COMMERCIAL PROGRAMMABL
16. 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 keypad and display for 365 day programming The subbase includes equipment control connections The subbase mounts on the wall and the thermostat mounts to the subbase PRODUCT DATA FEATURES Typically used in buildings including restaurants shopping malls office buildings and banks under 55 000 square feet Forsingle zone rooftop units split systems heat pumps or hot chilled water systems e 365 day programming Two Occupied and two Not Occupied periods per day Individual heat and cool setpoints available for Occupied and Not Occupied periods P l D control minimizes temperature fluctuations Recovery ramp control automatically optimizes equipment start times based on building load Convenient overrides allow temporary setpoint changes Keypad multi level lockout available with all models Remote sensor capability for temperature including outdoor air and discharge air and humidity sensors Auxiliary subbase contact typically interface with a Honeywell Economizer System for total rooftop control integration or act as dehumidification output
17. ary functions depending on configuration for Conventional or Heat Pump operation See Table 9 for details NOTE The default functions cannot be modified They are limited to firmware version 1 3 0 or higher T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 9 Default Auxiliary Relay Operations Heat Pump or Contact Not Used as Conventional Heat or Cool Stage Contact Configuration of Contact Not Used as Stage Heat Pump Y3 Simple Simple Time of Day Time of Day Dehumidification Dehumidification W2 not aux heat Economizer Time of Day Economizer Economizer Conventional W3 not Simple Simple Simple Time of Day Dehumidification Dehumidification Dehumidification Y3 not W3 not Economizer Time of Day Time of Day Economizer Y3 not W3 used Simple Simple Simple Time of Day Dehumidification Dehumidification Dehumidification i A A Auxiliary Contact Configuration Time of Day Economizer Hot Gas Bypass Simple Dehumidification Dehumidification 8Simple dehumidification uses a normally closed contact The relay is closed when humidity is below the high limit When the humidity is above the high limit the contact is open 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 auxi
18. between scheduled heat or cool setpoint changes from not occupied to standby and not occupied to occupied Other setpoint changes use a setpoint step change Recovery Ramping for Heat Pump Systems During recovery with heat pump equipment the heating setpoint is split into a heat pump setpoint for compressors and two auxiliary heat setpoints for the auxiliary heat stages Refer to Fig 11 for the various setpoints HEAT PUMP SETPOINT OCCUPIED FOR COMPRESSORS SETPOINT P NORMAL RECOVERY RAMP AUX HEAT STAGE 2 RAMP NOT OCCUPIED AUX HEAT SETPOINT STAGE 1 RAMP SPACE TEMPERATURE RECOVERY TIME 3 OCCUPIED TIME M19877 Fig 11 Heat Setpoint Ramping for Heat Pump Systems Heat pump ramping for heating proceeds as follows 1 The heat pump setpoint begins to ramp until the room temperature and the compressor ramp intersect 2 Atthis point the heat pump setpoint performs a step change to the Occupied or Standby setpoint and all auxiliary heat stages are disabled NOTE The heat pump setpoint remains here for the rest of the Not Occupied period 3 The stage one auxiliary heat ramp is calculated based on a steeper slope starting 1 F 0 5 C below the not occupied setpoint 4 When the room temperature intersects this auxiliary heat ramp the first stage of auxiliary heat is enabled 5 The stage two auxiliary heat ramp is calculated based on an even steeper slope starting 2 F 1
19. chieve the 48 hour power loss clock reten tion the T7351 must be powered for at least 5 minutes Approvals UL 873 Recognized NEC Class 2 FCC Part 15 subpart J Class A cUL When purchasing replacement and modernization products from your TRADELINE wholesaler or distributor refer to the TRADELINE Catalog or price sheets for complete ordering number If you have additional questions need further information or would like to comment on our products or services please write or phone 1 Your local Honeywell Environmental and Combustion Controls Sales Office check white pages of your phone directory 2 Honeywell Customer Care 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 3 http customer honeywell com or http customer honeywell ca International Sales and Service Offices in all principal cities of the world Manufacturing in Belgium Canada China Czech Republic Germany Hungary Italy Mexico Netherlands United Kingdom and United States 63 2666 03 Table 2 Default Setpoints Conirol Occupied Not Occupied Standby Heating 70 F 21 C 155 F 13 C 67 F 19 C Cooling 75 F 24 C 85 F 29 C 78 F 26 C 2 3 16 56 6 3 4 171 lo SUBBASE 2 3 8 60 1 5 8 3 1 4 83 42 6 9 16 166 M22432 Fig 1 Thermostat and Subbase Dimensions in inches mm Accessories Duct Discharge Air Sensors C7041B 6 o
20. e i key Refer to Table 6 for valid day choices 5 Use the Up Down keys to set the duration The first holiday is now set and pressing the e9 key will take you to programming the second holiday denoted by the number 2 on the screen Table 6 Valid Day Values Value Description Value Description 1 to 31 Day of month 42 Second 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 7 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
21. he heat pump compressor changeover fan and emergency heat O B Terminal for Heat or Cool Changeover The O B terminal controls heat pump changeover The default operation is for the terminal to be powered when calling for heat or while the most recent call was for heat This corresponds to a typical B terminal NOTE The O B terminal can be configured to operate as a typical O terminal powered on call for cool Emergency Heat With the system set for Em Heat auxiliary heat serves as stage one compressor stages are locked off The fan cycles with the auxiliary heat Equipment Protection As part of the operational sequence the T7351 microprocessor incorporates cycle rate and minimum on and off times for all heating and cooling stages This extends equipment life as it prevents rapid cycling of equipment NOTE Minimum on and off times are fixed Cycle Rates The thermostat control algorithm maintains the temperature by cycling stages of heating or cooling to meet setpoint Cycle rates in cycles per hour cph are set in the installer setup NOTE Defaults are heat 6cph cool 3cph P I D Control The T7351 microprocessor based control requires that the user understands temperature control and thermostat performance A conventional electromechanical or electronic thermostat does not control temperature precisely at setpoint Typically there is an offset droop in the control point as the system load changes Th
22. hrough Em Heat Off Cool and Auto 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 7 T7351 Key Function Summary Continued Grouping Button Definition Schedule Fan e Selects fan operation mode Toggles between On and Auto Run Schedule C Resumes running schedule cancels Temporary Occupied action Holiday and or 9 Temporary setpoint changes a 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 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 j j a To enter test mode press up 4 or down v until the Special Functions display indicates IN TEST b Tocancel this option ensure display indicates NO Restore Factory Configuration Run Clear TEST 3 Press Run Schedule IMPORTANT This operation erases current configuration and NOTES restores factory defaults for all configuration To verify whether or not
23. if there is no call for cool or outdoor air is not suitable for free cooling the economizer is controlled to minimum position This position allows some percentage of outdoor air to enter the building regardless of air suitability The situation can cause the heating or cooling to run more often than when only suitable air is permitted to enter the building The T7351 can take advantage of an economizer by closing the auxiliary relay contacts to control the economizer minimum position potentiometer See Table 8 for details Powered Allows normal economizer operation Unpowered Disables the economizer minimum position The lack of power causes the economizer to drive dampers fully closed instead of staying at minimum open position This reduces the possibility of unsuitable outdoor air entering the building which lowers the internal load on the HVAC system and saves additional energy Table 8 T7351 Auxiliary Relay Logic Economizer and TOD Occupancy Auxiliary Contacts Scheduled Motion Sensor Effective Period Signal Occupancy Economizer TOD Notes Occupied No Sensor Occupied Closed Closed Wired Occupied Motion Sensed Occupied Closed Closed Occupied No Motion Standby Open Closed only Open Effective Occupancy is Standby Standby Sensed during calls for cool setpoints are used and it assumes that the space is unoccupied Economizer relay is energized only on calls for coo
24. inal screw Push excess wire back into the hole in the wall Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat BON 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 3 T7351 Subbase for Three stage Heat Three stage Cool Systems Terminal 8S ao l T 2 c 9 amp 9 z Description RC8 RC8 24 VAC Cooling transformer RH RH8 24 VAC Heating transformer X X Common aux aux Auxiliary relay W1 O B Conventional Stage 1 heating relay Heat Pump Changeover relay for heating B or cooling O P W2 W1 Conventional Stage 2 heating relay Heat Pump 1st Stage auxiliary heat relay Y1 Y1 Conventional Stage 1 cooling relay Heat Pump Stage 1 compressor relay Y2 Y2 Conventional Stage 2 cooling relay Heat Pump Stage 2 compressor relay AS JAS Discharge Air Sensor connection 1 AS AS_ Discharge Air Sensor connection 2 OS JOS Outdoor Air Sensor connection 1 OS JOS Outdoor Air Sensor connection 2 G G Fanrelay T3 T3 TR20 Series Remote Sensor connection 1 T4 T4 TR20 Series Remote Sensor connection 2 T5 T5 TR20 Series Remote Sensor connection 5 T6 T6 TR20 Series Remote Sensor connection 9 T7 T7 TR20 Series Remote Sensor connection 7 W3 W2 Conventional Stage 3 heat or stage 4 cool relay Heat Pump 2nd Stage auxiliary heat relay YS
25. is is a phenomenon that most people in the industry know and accept IMPORTANT e P I D Loop Tuning parameters are optimized for proper operation of a vast majority of HVAC systems Only when completely certain of necessary and proper changes should you alter these values e Improper changes result in poor system performance and equipment problems such as compressor short cycling Other problems include wide swings in space temperature and excessive overdriving of modulating outputs All adjustments to Loop Tuning parameters should be gradual After each change allow the system to stabilize to accurately observe the effects of the change Then as needed make further refinements until the system operates as desired If adjustment of PID parameters is required use the following 63 2666 03 14 NOTE In the items that follow the term error refers to the difference between the measured space tem perature and the current actual space tempera ture setpoint The Throttling Range TR also called Proportional Gain determines the impact of the error on the output signal Decreasing TR amplifies the error effect that is for a given error smaller TR causes higher output signal The Integral Time IT also called Integral Gain determines the impact of the error over time on the output signal Error over time has two components making up its value amount of time the error exists and size of the error The highe
26. liary 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 NOTES These methods operate only during cooling Selecting both Reheat and Reset 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 cooling when setpoint control does not require it The minimum on time 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 17 IMPORTANT At times during Reheat dehumidification the T7351 operates heating and the cooling simultaneously 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 n
27. ling Not Occupied No Sensor Not Open Closed only Open Wired Occupied during calls for cool Occupancy sensor will only be active during Not Occupied Motion Sensed Not Open Closed only Open scheduled Occupied periods During scheduled Occupied during calls for cool Not Occupied periods the effective occupancy will always be Not Occupied Not Occupied No Motion Not Open Closed only Open Sensed Occupied during calls for cool Unless otherwise noted Economizer logic ignores calls for heat The Economizer relay will be energized during calls for cooling b With fan set to AUTO and call for neither heat nor cool the relay is open in order to disable damper minimum position Other Uses for the Auxiliary Relay Examples of other uses of the auxiliary relay are hot water heaters lighting or baseboard heat The additional loads are connected to the auxiliary relay contacts on the subbase The contacts are rated for 1 5A at 30 Vac but can be adapted to higher current applications using an external relay See Fig 13 T7350A B D M SUBBASE TO LOAD AUXILIARY RELAY CONTACT A RELAY REQUIRED R8222 OR SIMILAR Misi Fig 13 Using T7351 Models with an External Relay with loads greater than 1 5A 63 2666 03 Default Auxiliary Relay Operations Unless configured as a stage of heating or cooling terminals W2 W3 and Y3 operate for specific auxiliary functions Each output takes on different auxili
28. matic exit all changes are lost Configuration can be done with the keypad using the Installer Setup ISU Table 5 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 except Information HEATPMP O 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 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 1 0 3 Number of Conventional 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 JO 0 2 Number of Heat Pump Heating Stages Only shown when Heat Pump is selected 0 0 Au
29. nor bypass can be used for temperature averaging M4823A Fig 2 Typical Location of Thermostat or Remote Mounted Sensor 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 Belden type 8762 or equivalent for 2 wire The cable shield must be grounded only at the controlled equipment case Mounting Subbase The subbase mounts horizontally or vertically IMPORTANT e When using the internal temperature sensor the device must be mounted horizontally with the LCD facing upwards Precise leveling is not needed e When using remote sensors thermostat mounting orientation does not matter 63 2666 03 Wall mounting using standard drywall screws is standard Mounting to a 2 in 50 8 mm by 4 in 101 6 mm wiring box can be accomplished for a horizontal box no extra hardware is required for a vertical box part 209651A is required Mount to European standard wall box 2 4 in having 61 mm between mounting screws in a horizontal line with or without adaptive hardware 1 Position and level the subbase NOTE A level wallplate is only for appearance The thermostat functions properly when not level 2 Use a pencil to mark the mounting holes Refer to Fig 6 3 Remove the subbase from the wall and drill two 3 16 in 4
30. ns 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 System Settings Auto Thermostat automatically changes between heating and cooling based on indoor temperature Cool Thermostat controls only cooling Off Heating cooling and fan are all off Heat Thermostat controls only heating Em Heat Auxiliary heat serves as first stage Compressor stages are locked off T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Fan Settings On See Table 4 Auto Fan always cycles with call for heating or cooling Conventional The equipment i e plenum switch controls fan operation in heat mode The thermostat controls fan operation in cool mode Electric Heat The thermostat controls fan operation in both heat and cool modes NOTE 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 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 4 T7351 Intelligent Fan ON control logic Call for Occupancy Effective Occupancy Motion Sensor Signal Scheduled Period Occupied No Sensor Wired Occupied Heat Cool Occupied Motion Sensed Occupied Occupied No Motion Sensed Standby Not Occupied No Sensor Wired Not Occupied Effective Occupancy is Standby
31. o GET SHD 3 Press Run Schedule a To retrieve the saved schedule press up A4 or down until the display indicates YES Test Mode Occupied Not Occupied b To cancel this option ensure display indicates NO Schedule Day 3 Press Run Schedule Ay CAUTION OPERATION Possible Equipment Damage n Equipment damage can result if compressor is Startup Operation 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 Upon initial thermostat power up a startup and initialization program begins This startup occurs only on initial power up After total loss of power for an extended period the current time and day can be lost requiring reset However the Use the Test Mode to check the thermostat configurations and thermostat retains the user program operation To start the system test NOTE With no program set the thermostat controls to 1 Press Schedule Day Occupied and Not Occupied the Occupied default setpoints of 70 F 21 C for simultaneously heat and 75 F 24 C for cool 2 The display gives the option to TEST 13 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT T7351 Relay Logic All T7351 model thermostats contain at least four switching relays In conventional applications the relays control first stage cooling first stage heating fan and auxiliary In heat pump applications the relays control t
32. ontact 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 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 Subbase WHEN USED TO SENSE ROOM TEMPERATURE Install the thermostat about 5 ft 1 5 m above the floor in an area with good air circulation at average temperature Refer to Fig 3 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 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 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 5 m above the floor in an area with good air circulation at average temperature See Fig 2 NOTE Only TR21 models with neither setpoint adjust ment
33. or cooling lower Upper or lower temperature limits were reached Check the temperature setpoints e Heating limits are 40 to 90 F 4 to 32 C Cooling limits are 45 to 99 F 7 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 Change keypad lock level Room temperature is out of control Remote temperature sensing is not working Check all remote sensors Heat 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 e Check if circuit breaker is tripped if so reset circuit breaker e Check if system fuse is blown if so replace fuse 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 e Configure heating response System selection is set to Off or Cool Set system selection to Heat or Auto DAT high limit has been reached or OAT lockout is engaged e If the setpoints are cor
34. put during call for multiple cooling stages for two reasons 1 This method assumes that the cooling provides dehumidification 2 Multiple cooling stages probably provide necessary dehumidification NOTE Hysteresis and a minimum timer prevent short cycling of this output TROUBLESHOOTING GUIDE TABLE 11 Table 11 Troubleshooting Information Symptom Display will not come on Possible Cause Thermostat is not being powered Action Check that X terminal is connected to the system transformer Check for 24 Vac between X and RH or RC terminals If missing 24 Vac e Check if circuit breaker is tripped if so reset circuit breaker e Check if system fuse is blown if so replace fuse 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 Temperature display is incorrect Thermostat is configured for F or C display Press both Run Schedule and Copy then reconfigure the display Bad thermostat location Relocate the thermostat Display shows three dashes and a degree sign all systems shut down T7351 is set for the remote sensing and sensor is missing or circuit is either open or shorted Temperature settings will not change Example Cannot set heating higher
35. r 12 in 152 or 305 mm C7041C 18 in 457 mm C7041J 12 ft 3 66 m averaging C7770A 8 in 203 mm probe Outdoor Air Sensors C7170A C7031G2014 weatherproof Temperature Sensors Remote C7772A TR21 TR22 TR23 and TR24 series TR21 WK TR23 WK T7771 Economizer Logic Modules W7210 W7212 W7215 W7459 Humidity Sensors H7625 H7635 Others 209541B FTT network termination module 2096514 Vertical Mounting Hardware Wallplate Adapter Trident white 50000452 001 Troubleshooting Cable TG512 Universal Versaguard Thermostat guards T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT 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 N CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply before installation IMPORTANT All wiring must agree with applicable codes ordinances and regulations W 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 C
36. r the IT the slower the control response In other words a decrease in IT causes a more rapid change to the output signal The Derivative Time DT also called Derivative Gain determines the impact of the error rate on the output signal The error rate is how fast the error value changes It can also be the direction the space temperature is going either toward or away from the setpoint and its speed rapid or slow A decrease in DT causes for a given error rate a greater effect on output signal Recovery Ramping Logic The T7351 incorporates a ramping feature that gradually changes the space setpoints During recovery operation the setpoint changes at a rate in degrees per hour depending on the outdoor air temperature If there is no outdoor air temperature sensor available the minimum ramp rate is used When recovering in heating the control point raises gradually maximizing the use of the more economical first stage heat to bring the sensed temperature to the desired comfort setpoint This minimizes using the typically more expensive later stage s of heat NOTE See Fig 10 for a pictorial representation of the heat ramp rate determination Recovery Ramping for Conventional Systems HEAT RECOVERY RAMP RATE DEGREES HOUR MaxHtRamp MinHtRamp OUTDOOR AIR TEMPERATURE OaTempMinHtRamp OaTempMaxHtRamp M10109A Fig 10 Heat Setpoint Ramping for Conventional Systems NOTES Recovery ramping applies
37. rect do nothing e Adjust or disable DAT high limit and or OAT lockout Check HVAC equipment to ensure proper operation 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 11 Troubleshooting Information Continued Symptom Cooling 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 RC terminals If missing 24 Vac e Check if circuit breaker is tripped if so reset circuit breaker e Check if system fuse is blown if so replace fuse 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 e Configure cooling response System selection is set to Off or Heat Set system selection to Cool or Auto DAT low limit has been reached or OAT lockout is engaged fthe setpoints are correct do nothing e Adjust or disable DAT low limit and or OAT lockout Check HVAC equipment to ensure proper operation 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
38. trols Time of day TOD e Economizer minimum position control e Dehumidification see Dehumidification section Relay for Time Of Day Table 8 Time of day TOD is the Auxiliary Relay default configuration TOD logic operates strictly according to programming Occupied Relay contacts closed Not Occupied Relay contacts open Standby Scheduled Relay contacts closed Relay for Economizers Mechanical cooling is often used with outside temperatures in the 50 F 10 C to 60 F 16 C range and humidity below 50 percent In central and northern climates hundreds of hours fall into this temperature category By permitting 80 to 100 percent outside air into the system mechanical cooling may not be needed at all particularly during Spring and Fall Economizers take advantage of outside air The typical economizer consists of an outside air damper motor outdoor air changeover control and a minimum position potentiometer The motor controls the dampers Suitability of the outside air for cooling is determined by the outdoor air changeover control 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT The potentiometer adjusts the minimum position of the economizer dampers which provide a minimum amount of fresh air for ventilation The economizer reduces compressor run time thereby saving energy and extending compressor life The drawback to using the economizer is that during the Not Occupied period
39. umber of degrees below the actual set point when room relative humidity RH rises above humidity high limit The default value is 2 degrees Though this may not technically reduce RH 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 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 above humidity high limit De energizes when RH drops below humidity high limit NOTES 5 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 DEHUMID HOT GAS BP The auxiliary output operates as shown in Table 10 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 10 Hot Gas Bypass Dehumidification Logic Humidity Cooling Stages Active Auxiliary Output High more than one De energized High one or less Energized Low more than one De energized Low one or less De energized Auxiliary out
40. x Stages 1 1 Aux Stages 2 2 Aux Stages AUX CON JO 0 3 Aux Contact Functionality 0 Time of Day 1 Economizer 2 Dehumid Hot Gas Bypass 3 Simple Dehumid WALLMOD 0 0 3 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 occupied 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 9 63 2666 03 T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 5 Installer Setup Continued Text Default Choices Notes OATSENS 0 0 1 Outdoor Air Sensor Selection 0 None 1 Remote Outdoor Air Sensor DATSENS 0 0 1 Discharge Air Sensor Selection 0 None 1 Remote Discharge Air Sensor HUMSENS 0 0 2 Room Humidity Sensor selection 0 None 1 On Board Sensor 2 Remote Sensor OCCSENS 0 0 1 Occupancy Sensor Selection 0 None 1 Remote Occ Sensor FAN HT 0 0 1 Fan Operation on Heat 0 Conventional Equipment controls Fan 1 Electric Thermostat turns on Fan with call for Heat XFANHT Y
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