Engineered Comfort T1075N User Manual And Installation Instructions
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Engineered Comfort T1075N User Manual And Installation Instructions

7-day programmable fan coil thermostat 3 speed fan control 4 pipe systems nc chilled water, no hot water
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Summary of Contents for Engineered Comfort T1075N

  • Page 2: Table Of Contents

    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. T1075N © Copyright 2015, All Rights Reserved...

  • Page 3: Front Panel

    Front Panel COOL AUTO HEAT Mode 1 Liquid Crystal Display with Thermoglow 2 Up/Down Buttons 3 Mode Button 4 Fan/Override Button 5 Heat or Cool Indicator Heat = Red, Cool = Green...

  • Page 4: Display

    Display UTSIDE 1 Mode Indicators - Page 7-10 Selects the operational mode of the equipment. HEAT - Indicates the heating mode. COOL - Indicates the cooling mode. AUTO - Indicates the system will automatically changeover between heat and cool modes as the temperature varies. PROGRAM ON - Indicates the time period program is enabled to run.
  • Page 5 Display UTSIDE 5 Override icon - Page 9 & 18 Indicates the program is currently being overriden for up to six hours. 6 Occupied & Unoccupied icons - Pages 10-14 Indicates the program number: Occupied 1, 2, 3, or Unoccupied. 7 Setup icons - Pages 15-19 Indicates the thermostat is in the advanced setup mode.
  • Page 6 Display UTSIDE 9 Start & Stop icon - Page 14 Appear when programming occupied time periods. 10 Locked icons - Pages 27 Indicates keypad has been locked.

  • Page 7: Quick Start Set The Clock And Go

    Quick Start Set the Clock and Go MODE Press the MODE and FAN buttons at the same time for two seconds to enter Setup screens. During Setup and Programming: Pressing Setting the Clock the UP or DOWN button Tip: To change hours will modify the flashing quickly, press and hold selection.

  • Page 8: Selecting The Heat Or Cool Mode

    Selecting the Heat or Cool Mode 4-Pipe Operation Select Mode by Pressing the MODE Button Heating Only The HEAT setting indicates the temperature that the room has to fall to before the heating source will turn on to heat the room. Press MODE Cooling Only...

  • Page 9: Basic Operation

    Basic Operation Selecting Your Desired Temperature (adjusting the setpoints) AUTO OR PROGRAM MODE Pressing the UP or DOWN button in Auto or Program mode will adjust both the heat and cool set temperatures simultaneously. Adjust the desired set temperature with the buttons Fan Operation Press...

  • Page 10: Overriding The Daily Schedule

    Basic Operation Overriding the Daily Schedule Pressing and holding the FAN button for 5 seconds may be used to interrupt the normal time schedule programming of the thermostat. The override feature may only be used when the thermostat is running the time schedule, in Program On mode. Unoccupied Operation - During programmed, unoccupied periods pressing and holding the FAN button for 5 seconds will temporarily force the thermostat into Occupied 1 comfort settings for one to six hours (step #14, page 18).
  • Page 11 Programming Occupied & Unoccupied Periods Press the MODE button. While holding MODE, press MODE the UP button for two seconds to enter time period programming. Select the maximum # of occupied periods to be used on any one day. Typically, most installations use only Occupied 1.
  • Page 12 Programming Occupied & Unoccupied Periods Adjust the heating setpoint for Unoccupied periods. (35˚- 99˚) Press MODE Select day of the week for Occupied 1. (Mo - Su) Press MODE Adjust the start time for Occupied 1. Press MODE Adjust the stop time for Occupied 1.
  • Page 13 Programming Occupied & Unoccupied Periods The copy command becomes available after the maximum # of occupied periods are programmed in a day. This example uses 1 as the maximum occupied periods ever programmed in one day. Select Yes or No to copy the previous day’s program to this day.
  • Page 14 Programming Occupied & Unoccupied Periods Adjust the stop time for Occupied 1. Select Occupied 1 to run on this day (On), or not to run this day (Off). Press MODE Select Yes or No to copy the pre- vious day’s program to this day. If Yes is selected: If No is selected:...
  • Page 15 Programming Occupied & Unoccupied Periods PROGRAMMING NOTES You will be prompted to enter both heat and cool setpoints even if the thermostat is configured for heat only, or cool only. • If only Occupied 1 is selected, the Occupied 2 & 3 steps will be skipped. Further, if only 2 occupieds are selected, the Occupied 3 steps will be skipped. • Heat & Cool setpoints for Occupied 1 are the same for each day. Heat &...
  • Page 16 Advanced Setup MODE Press the MODE and FAN NOTE: Each step # is located at the top right corner of the buttons at the same time display for easy reference. for 10 seconds to enter Advanced Setup screens. Adjust the time of day. Tip: To change hours quickly, press and hold the FAN Setup...
  • Page 17 Advanced Setup Select display operation: Setup 1 = Single Setpoint 2 = Dual Setpoint See page 29 Note: When Single Setpoint is selected, the heating or cooling setpoint Press will always be displayed. To display the room temperature, press and hold MODE the MODE button for two seconds.
  • Page 18 Advanced Setup Adjust the minimum difference Setup COOL between cooling & heating setpoints. (0˚ - 6˚) HEAT Press MODE Select backlight operation: On - Light continuously Setup Off - Light for 8 seconds after a button press Press MODE Select thermostat Setup operation in degrees Fahrenheit or Celsius.

  • Page 19: Advanced Setup

    Advanced Setup Adjust the amount of time Setup override will be active during Override the unoccupied time period. (0-6 hours) Press MODE Dry Contact NO = Normally Open Setup NC = Normally Closed See Page 23 Continued...
  • Page 20 Advanced Setup Occupied Select Dry Contact operation: Setup occupied Occupied - the thermostat will enter the Occupied mode when the Dry Contact is closed. Unoc- Unoccupied -the thermostat cupied will enter the Unoccupied mode when the Dry Contact is closed. Press MODE Step #17 only appears if step #16 = Unoccupied.
  • Page 21 Advanced Setup Step# Description Range Time of Day 24 hour 12:00 am Day of the Week Mo - Su Display Blanking On / Off Single or Dual Setpoint 1 / 2 Fan Auto Operation On / Off Deadband/Temp. Swing 1st Stage 1˚...
  • Page 22 About Advanced Features & Operation 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. Place the thermostat in the OFF mode. MODE Press and hold the MODE button.
  • Page 23 About Advanced Features & Operation DEADBAND OPERATION - Controls one Heat and one Cool stage with a three speed fan (see below). The low speed fan for heat or cool is turned on when: The temperature spread from the setpoint is equal to or greater than: the setpoint plus the 1st stage dead-band (step #9, page 16).
  • Page 24 About Advanced Features & Operation DRY CONTACT SWITCH - This feature allows an external device such as a Central Time Clock, Occupancy Sensor, or a Telephone activated device to force one or more thermostats into an Unoccupied mode (steps #15 and 16, page 18-19).

  • Page 25: About Advanced Features & Operation

    About Advanced Features & Operation FACTORY DEFAULTS - If, for any reason, you desire to return all the stored settings back to the factory default settings, follow the instructions below. WARNING: This will reset all Time Period and Advanced Programming to the default settings.
  • Page 26 About Advanced Features & Operation FAN OPERATION - Fan operation is available in four different modes: Fan: When only the fan icon is displayed this indicates that (1) the fan is in the Auto mode, (2) the fan will only energize during a heating or cooling cycle, and (3) the fan will modulate fan speeds based on temperature demand.
  • Page 27 About Advanced Features & Operation ENERGY SAVING SMART FAN - This feature automatically de-energizes the fan during an Unoccupied time period, except when necessary to heat or cool. Note: The fan will not de-energize during an Unoccupied time period if it has been programmed for continuous operation (step #7, page 16).
  • Page 28 About Advanced Features & Operation KEYPAD LOCKOUT - To prevent unauthorized use of the thermostat, the front panel buttons may be disabled. To disable, or ‘lock’ the keypad, press and hold the MODE button. While holding the MODE button, press the UP and DOWN buttons together.
  • Page 29 About Advanced Features & Operation OUTSIDE SENSOR - To view an Outside Sensor (step #13, page 17), enter the Advanced Setup by pressing and holding the MODE button. While holding MODE, press the FAN button for 10 seconds to enter Setup screens. Advance to setup step #13 by repeatedly pressing the MODE button.
  • Page 30 About Advanced Features & Operation SINGLE SETPOINT BEHAVIOR - When configured for Single Setpoint operation (step #4, page 16), the degree icon will blink when the large number is displaying 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.
  • Page 31 Sample Wiring Diagram Important Note: If a Duct Duct Sensor EC0402 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) Thermostat Connect directly to R terminal on backplate.
  • Page 32 Sample Wiring Diagram Auxiliary Input Control and Multiple HVAC Control Potential Phasing Problems CAUTION WARNING When using the auxiliary input (CK1 & R) or controlling multiple HVAC units with a single thermostat, it is possible to encounter transformer phasing problems that will interfere with thermostat operation.
  • Page 33 Warranty One-Year Warranty - This Product is warranted to be free from defects in material and workmanship. If it appears within one year from the date of original installation, whether or not actual use begins on that date, that the product does not meet this warranty, a new or remanufactured part, at the manufacturer’s sole option to replace any defective part, will be provided without charge for the part itself provided the defective part is returned to the distributor through a qualified servicing dealer.
  • Page 34 Printed on recycled paper. www.engineered-comfort.com P/N 88-1092 Rev. 1...

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