Engineered Comfort T1075N User Manual And Installation Instructions Download | Manualshive

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Summary of Contents for T1075N

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Page 2: ...installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his her own expense This Class A digital apparatus meets all the requirements of the Canadian Interference Causing Equipmen...

Page 3: ...Front Panel 2 Mode Fan AUTO COOL HEAT 1 Liquid Crystal Display withThermoglow 2 Up Down Buttons 3 Mode Button 4 Fan Override Button 5 Heat or Cool Indicator Heat Red Cool Green 1 3 2 4 5 ...

Page 4: ...modes as the temperature varies PROGRAM ON Indicates the time period program is enabled to run OFF Indicates heating and cooling are turned off 2 Clock with Day of theWeek Page6 Indicates the current time and day This clock is also used to program the time period schedules 3 RoomTemperature Display Indicates current room temperature 4 Desired SetTemperature Page11 Indicates desired room temperatur...

Page 5: ...icates the program number Occupied 1 2 3 or Unoccupied 7 Setup icons Pages15 19 Indicates the thermostat is in the advanced setup mode 8 Fan icon Page8 Indicates fan operation Fan low speed Fan medium speed Fan high speed When only the Fan icon is displayed the fan is in the Auto mode and will run only when necessary to heat or cool OUTSIDE 8 6 7 5 ...

Page 6: ...Display 5 9 Start Stop icon Page14 Appear when programming occupied time periods 10Locked icons Pages27 Indicates keypad has been locked OUTSIDE 9 10 ...

Page 7: ...odify the flashing selection Tip To change hours quickly press and hold the FAN button and press the UP or DOWN button Press the MODE and FAN buttons at the same time to return to normal operation Thethermostatispreprogrammedfromthefactorytooperatea4pipesystemwithout theneedforfurtherprogramming FAN FAN MODE MODE SettingtheClock SettingtheDay MODE Press To adjust the Clock or Day Use ...

Page 8: ...e to before the cooling source will turn on to cool the room Heating or Cooling AUTO will automatically select heat or cool based on room temperature demand Time Schedule for Heating or Cooling Program On will activate the stored timer operation for the heating and cooling setpoints occupied or unoccupied periods Off OFF indicates both heating and cooling are turned off Press MODE Press MODE Press...

Page 9: ...d set temperature with the buttons Pressing the FAN button will run the fan in low medium or high speed continuously seebelowandpage25 When only the Fan icon is displayed the fan is in the Auto mode and will run only when necessary to heat or cool seebelowand page25 Note IfthethermostatisplacedintheOffmode thefanwillde energize seepage7 Fan Fan Fan Fan FAN Fan Press FAN Press FAN Press FAN Press F...

Page 10: ...nd holding the FAN button for 5 seconds will temporarily force the thermostat into Occupied 1 comfort settings for one to six hours step 14 page18 The Override icon will be illuminated during this time If you press and hold the FAN button while the thermostat is currently overriding the daily schedule this will reset the timer returning the thermostat to the correct time period program for the day...

Page 11: ...gramming MODE Select the maximum of occupied periods to be used on any one day Typically most installations use only Occupied 1 1 2 or 3 Adjust the cooling setpoint for Occupied 1 35 99 Adjust the heating setpoint for Occupied 1 35 99 Adjust the cooling setpoint for unoccupied periods 35 99 Press MODE Press MODE Press MODE Press MODE Continued ...

Page 12: ...ccupied periods 35 99 Select day of the week for Occupied 1 Mo Su Adjust the start time for Occupied 1 Adjust the stop time for Occupied 1 Select Occupied 1 to run on this day On or not to run on this day Off Continued On Off Press MODE Press MODE Press MODE Press MODE Press MODE ...

Page 13: ...ammed in one day Select day of the week for Occupied 1 Tu Mo Adjust the start time for occupied 1 Continued Yes No SelectingYes then pressing mode will copy the previous day s program and then will ask the same copy question again If yes is selected each time this routine will repeat until Saturday is copied to Sunday After Saturday is copied to Sunday the copy command is unavailable MODE Press If...

Page 14: ...e 10 then cool heat setpoints and start stop times for additional occupied periods will be prompted SelectYes or No to copy the pre vious day s program to this day Yes No On Off SelectingYes then pressing mode will copy the previous day s program and then will ask the same copy question again If yes is selected each time this routine will repeat until Saturday is copied to Sunday After Saturday is...

Page 15: ...p onMTWTF This programwillrunfrom12 00amMTWTFto8 00amMTWTFandagainfrom 9 00pmMTWTFto12 00pmMTWTF The Unoccupied settings take effect at all times when 1 the program is on and 2 the current time is outside a preset occupied period For this reason start and stop times aren t necessary for unoccupied If the same start and stop times are programmed in for an occupied period then it will run 24 hours I...

Page 16: ...r10secondstoenter AdvancedSetupscreens NOTE Eachstep islocated atthetoprightcornerofthe displayforeasyreference MODE FAN DisplayOn DisplayOff Adjust the time of day Tip Tochangehoursquickly pressandholdtheFAN buttonandpresstheUPor DOWNbuttons Select the day of the week Setup Setup Setup ON Press MODE Press MODE Press MODE Continued ...

Page 17: ...playtheroomtemperature pressandhold theMODEbuttonfortwoseconds Thedegreeiconwillblinkwhenthe largenumberisdisplayingroomtemperatureandwillremainsolidwhen displayingtheheatingorcoolingsetpoint Setup Setup OFF OFF AUTO Setup On On Off Off Selectoperationwhen fanisintheAutomode On continuouslowspeedfan Off onlyenergizeduring aheatingorcoolingcycle SeePage25 Note 2 Seepage22forfurtherexplanation Adjus...

Page 18: ...nuously Off Light for 8 seconds after a button press On Off Setup Setup OFF COOL HEAT Setup Setup OUTSIDE OFF MODE Press MODE Press MODE Press MODE Press Continued On Off Select sensor operation On read only Duct sensor Off control to Duct sensor Select thermostat operation in degrees Fahrenheit or Celsius C F Sensor Reading ...

Page 19: ... Setup 18 NO NC Adjust the amount of time override will be active during the unoccupied time period 0 6 hours Dry Contact NO Normally Open NC Normally Closed SeePage23 MODE Press Continued Setup Setup Override ...

Page 20: ...ccupied operation Unoccupied when the Dry Contact is closed the thermostat will control to the Unoccupied setpoints Off when the Dry Contact is closed the thermostat will turn off Select Dry Contact operation Occupied the thermostat will enter the Occupied mode when the Dry Contact is closed Unoccupied the thermostat will enter the Unoccupied mode when the Dry Contact is closed Step 17onlyappearsi...

Page 21: ... 7 Fan Auto Operation On Off Off 9 Deadband Temp Swing 1st Stage 1 6 2 10 Minimum Heat Cool Differential 0 6 2 11 Backlight Operation On Off Off 12 Fahrenheit or Celsius F C F 13 Duct Sensor Operation On Off Off 14 OverrideTimer Length 0 6 hours 2 hours 15 Dry Contact Polarity NO NC NO 16 Dry Contact Operation Occupied Unoccupied Occupied 17 Dry Contact Setpoints Unoccupied Off Unocupied ...

Page 22: ...on 4 After calibration is complete press the MODE button once to save your changes and return to normal operation MODE MODE MODE CALIBRATION Under normal circumstances it will not be necessary to adjust the calibration of the temperature sensor If calibration is required please contact a trained HVAC technician to correctly perform the following procedure OFF OUTSIDE CLOCK BACKUP In the event of a...

Page 23: ...the1st stagedeadband step 9 page16 plusthe2ndstagedead band This 2nd stage deadband is fixed at one degree and is not adjustable The high speed fan for heat or cool is turned on when The temperature spread from the setpoint is equal to or greater than thesetpointplusthe1st stagedeadband step 9 page16 plusthe2ndstagedeadband plusthe3rd stagedeadband This 3rd stage deadband is fixed at one degree an...

Page 24: ...together and the thermostat is programmed for Unoccupied operation step 16 page19 the thermostat will be forced into Unoccupied setpoints and the Unoccupied icon will appear on the display Note ThethermostatmustbeinProgramOnmodeforthisfeaturetohaveany effect ImportantNote Forcontrolofmultiplethermostatsbyonesource referto PotentialPhasingProblems onpage31 Connectwirestoatimeclockor otherdevicetofo...

Page 25: ...this reset will be permanently lost 1 Place the thermostat in the OFF mode 2 Press and hold the MODE button While holding the MODE button press and hold the DOWN button for 5 seconds All icons will appear on the display 3 After all of the icons appear release the MODE and DOWN buttons Then press and hold the FAN button for 5 seconds 4 After the letters Fd appear on the display Factory Default rele...

Page 26: ...ermostat is placed in the Off mode or a dry contact forced unoccupied time period see page 23 Notes 1 If a Duct sensor is connected to this thermostat then the fan should be programmed for continuous operation step 7 page 16 This will provide airflow over the Duct sensor and provide more accurate temperature readings 2 If the fan is programmed for continuous operation step 7 page 16 the low speed ...

Page 27: ... to come any closer to each other than the value set in Advanced Setup step 10 on page 17 This minimum difference is enforced during Auto changeover and Program On operation Note To increase the spread between the heating and cooling setpoints in the Auto changeover mode press the MODE button until only the heat setpoint is displayed and adjust to the desired setpoint Press the MODE button until o...

Page 28: ...ODE button While holding the MODE button press the UP and DOWN buttons together The LOCKED icon will appear on the display then release the buttons Press all three buttons in the order outlined above for keypad lockout MODE Fan Locked Program On 1 To unlock the keypad press and hold the MODE button While holding the MODE button press the UP and DOWN buttons together The LOCKED icon will disappear ...

Page 29: ...ing Electrical interference may cause the sensor to give incorrect temperature readings See the Duct Sensor instructions for further details Digital Sensor High Temp Heat Shrink Tubing Plenum Rated Cable White Black Digital Sensor Plenum Rated Cable White Black OUTSIDE SENSOR To view an Outside Sensor step 13 page 17 enter the Advanced Setup by pressing and holding the MODE button While holding MO...

Page 30: ... room temperature and will remain solid when displaying the heating or cooling setpoint In the Auto mode the deadband is enforced both above and below the setpoint To avoid short cycling a deadband of at least two degrees is recommended step 9 page16 To display the room temperature press and hold the MODE button for two seconds Release the MODE button to return to the normal display ...

Page 31: ... H O 2 Ck 1 Y1 W1 H C 24 Volt Water Valves Thermostat 24vac Connect directly to R terminal on backplate 3 Speed Fan Relay or Solid Stat Relay Board Important Note If a Duct sensor is connected to this thermostat it is suggested that the fan be programmed for continuous operation step 7 page 6 of the owner s manual ...

Page 32: ...ts share a common ground with secondary grounded transformers SOLUTION If possible phase all HVAC units together If phasing is impractical isolation relays may be used to isolate the transformers To isolate the auxiliary input use a separate transformer for the auxiliary control device usually a time clock Connect the device to an isolation relay coil Connect one set of isolated contacts to each t...

Page 33: ...WHATSOEVER ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS ALL REPLACEMENT PARTS WHETHER NEW OR REMANUFACTURED ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR 1 Normal maintenance as outlined in the installation and servicing instructions or owner s manual including filter cleaning...

Page 34: ...Printed on recycled paper P N 88 1092 Rev 1 www engineered comfort com ...

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