Venstar T1 900 Owner's Manual
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Venstar T1 900 Owner's Manual

Residential 7-day programmable up to 3-heat & 2-cool thermostat
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Enlarged version
Digital
Digital
Thermostat
Thermostat
Control up to 3 Heat &
2 Cool Stages
3 Configurable Outputs
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
OWNER'S
OWNER'S
MANUAL
MANUAL
Venstar Inc. 08/07
residential
THERMOSTAT
T1 900
7-DAY
7-DAY
PROGRAMMABLE
PROGRAMMABLE
up to
3-heat
up to
3-heat
& 2-cool
& 2-cool
HEAT
HEAT
COOL
PUMP
with HUMIDITY
CONTROL
Dry Contact Equipped
Outdoor Sensor Ready with
High/Low Readouts for the Day
Equipped with Optional Humidity
Module: Controls Humidification,
Dehumidification and Reheat
Programmable Output
Accepts EZ Programmer
Accepts Optional IR Remote Control
Accepts Comfort Call
Phone Control Accessory

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  • Page 1 Accepts Comfort Call Aux Heat Indicator Phone Control Accessory Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat. OWNER’S OWNER’S MANUAL MANUAL Venstar Inc. 08/07...
  • Page 2 CAUTION Follow the Installation Instructions before proceeding. Set the thermostat mode to “OFF” prior to changing settings in setup or restoring Factory Defaults. CAUTION NEVER PUT MORE THAN ONE JUMPER ON THE SAME MISC JUMPER BLOCK! THIS MAY DAMAGE YOUR THERMOSTAT AND VOID MISC3 MISC3...
  • Page 3 How to Use This Manual The Table of Contents divides the thermostat features into sections making it easier to quickly find information. The first page of each section contains a more detailed Contents of each section, such as the example page shown below. SECTION 14 Timers and Deadbands Header shows section #...

  • Page 4: Glossary Of Terms

    Glossary of Terms Auto-Changeover: A mode in which the thermostat will turn on the heating or cooling based on room temperature demand. Configurable Output Jumper: Using jumpers on the thermostat you can configure the MISC1, MISC2, and MISC3 terminals to control humidification, dehumidification, 2nd stage cooling, 3rd stage heating, and a programmable output.

  • Page 6: Table Of Contents

    Table of Contents Getting to Know Your Thermostat Quick Start Setting Clock and Day Basic Operation Viewing Outdoor and Remote Temperature and Humidity Programming the Daily Schedule Programming the Fan Operation Thermostat Display Options Humidification Dehumidification Viewing Equipment Run-Times Electric Heat and Heat Pump Operation Dual Fuel Operation Timers and Deadbands...

  • Page 7: Getting To Know Your Thermostat

    SECTION 1 Getting to Know Your Thermostat Section 1 Contents: Front Panel Buttons.....1.2 Display Features......1.3 Page 1.1...

  • Page 8: Front Panel

    Front Panel Warmer Button sometimes referred Backlit LCD Display (glows red) to as the UP button I2:00 AUTO Cooler Button sometimes refer- (glows blue) red to as the DOWN button Mode Heat or Cool Demand Indicator Button Red = Heat, Green = Cool eries PLATINUM COMMERCIAL PROGRAMMABLE THERMOSTAT...
  • Page 9 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light Outside AUTO Vacation OFFON Morning DayNight Evening FanOn Mode Indicators - Section 4 Selects the operational mode of the equipment. HEAT - Indicates the heating mode. COOL - Indicates the air conditioning mode.
  • Page 10 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light Outside AUTO Vacation OFFON Morning DayNight Evening FanOn Morning, Day, Evening & Night icons - Section 6 Indicates the day part of the time period program. Setup icon - Sections 6-19 Indicates the thermostat is in the setup mode.
  • Page 11 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light Outside AUTO Vacation OFFON Morning DayNight Evening FanOn Vacation icon - Section 20 Indicates the thermostat has Vacation setpoints in use. AuxHeat icon - Page 14.4 Indicates 2nd stage electric strip heat is being used when the thermostat is programmed for Heat Pump operation.

  • Page 12: Quick Start

    SECTION 2 Quick Start Section 2 Contents: Setting the Clock and Day...2.2 Selecting the Heat or Cool Mode..........2.3 Selecting Your Desired Temperature........2.4 Using the Fan Button....2.4 Note: Following the instructions in this section will allow you to operate your thermostat using the factory default settings. These settings are depicted in the illustrations throughout this manual.

  • Page 13: Setting The Clock

    GRAM SET CLOCK VACATION Press the SET CLOCK button During Setup & Programming: Pressing the UP or DOWN Setting the Clock buttons will modify the flashing selection. I2:00 Setup To adjust the Clock or Day use Press Setting the Day MODE Setup Buttons.
  • Page 14 Selecting the Heat or Cool Mode Select Mode by Pressing the MODE Button I2:00 Heating Only The HEAT setting indicates the temperature the room has to reach before the furnace will Press turn on to heat the room. MODE I2:00 Cooling Only The COOL setting indicates the temperature the room has to...

  • Page 15: Using The Fan Button

    Selecting Your Desired Temperature (adjusting the setpoints) AUTO OR PROGRAM MODE Pressing the UP or DOWN buttons in Auto or Program mode will adjust both the heat and cool set temperatures simultaneously. Adjust the desired I2:00 set temperature with the AUTO buttons.

  • Page 16: Setting Clock And Day

    SECTION 3 Setting the Clock and Day Section 3 Contents: Setting the Clock......3.2 Setting the Day......3.2 Note: During setup & programming pressing the UP or DOWN buttons will modify the flashing selection. Page 3.1...
  • Page 17 GRAM SET CLOCK During Setup & Programming: VACATION Press the SET Pressing the UP or DOWN CLOCK button buttons will modify the flashing selection. Setting the Clock I2:00 Setup To adjust the Clock or Day use Press Setting the Day MODE Setup buttons.

  • Page 18: Basic Operation

    SECTION 4 Basic Operation Section 4 Contents: Programmable or Non- Programmable Thermostat..4.2 Manual or Auto-Changeover Thermostat........4.3 Selecting the Operating Mode..4.4 Selecting Your Desired Temperature........4.8 Note: During setup & programming pressing the UP or DOWN buttons will modify the flashing selection. Page 4.1...

  • Page 19: Programmable/Non-Programmable Thermostat

    Programmable or Non-Programmable Thermostat When the very simplest operation is desired, this thermostat may be configured to be non-programmable, with or without Auto Changeover. Follow the step below. If ‘NO’ is selected, the thermostat will lockout the Program On screen; only the Off, Heat, Cool, and Auto screens may be accessed by pressing the MODE button.
  • Page 20 Manual or Auto-Changeover Thermostat When the very simplest operation is desired, this thermostat may be configured to be a manual heat and cool thermostat, with or without time period programmability. Follow the step below. The thermostat may be programmed to function as a Heat Only or Cool Only thermostat by selecting ‘NO’...
  • Page 21 Operating Mode when the Thermostat is Configured to be: NON-PROGRAMMABLE WITH MANUAL CHANGEOVER - If the thermostat is configured to be a non-programmable thermostat with Manual Changeover, the following screens will be available by pressing the MODE button. Select the Mode by Pressing the MODE Button I2:00 Heating Only The HEAT setting indicates the...
  • Page 22 Operating Mode when the Thermostat is Configured to be: NON-PROGRAMMABLE WITH AUTO CHANGEOVER - If the thermostat is configured to be a non-programmable thermostat with Auto Changeover, the following screens will be available by pressing the MODE button Select the Mode by Pressing the MODE Button I2:00 Heating Only The HEAT setting indicates the...
  • Page 23 Operating Mode when the Thermostat is Configured to be: PROGRAMMABLE WITH MANUAL CHANGEOVER - If the thermostat is configured to be a programmable thermostat with Manual Changeover, the following screens will be available by pressing the MODE button. Select the Mode by Pressing the MODE Button I2:00 Heating Only The HEAT setting indicates the...
  • Page 24 Operating Mode when the Thermostat is Configured to be: PROGRAMMABLE WITH AUTO CHANGEOVER - If the thermostat is configured to be a programmable thermostat with Auto Changeover, the following screens will be available by pressing the MODE button. Select the Mode by Pressing the MODE Button I2:00 Heating Only The HEAT setting indicates the...
  • Page 25 Selecting Your Desired Temperature (adjusting setpoints) AUTO OR PROGRAM MODE Pressing the UP or DOWN buttons in Auto or Program modes will adjust both the heat and cool set temperatures simultaneously. For more information on this see page 14.2. Adjust the desired I2:00 set temperature with the AUTO...
  • Page 26 SECTION 5 Viewing the Temperature and Humidity Sensors Section 5 Contents: Viewing the Outdoor Temperature......5.2 Viewing the Indoor Humidity........5.3 Page 5.1...
  • Page 27 Viewing the Outdoor Temperature (RS This requires an outdoor sensor (optional accessory) to be installed (see page 16.2 for wiring instructions). To read the temperature from the outdoor sensor, press the OUTDOOR button. The display will then show the current outdoor temperature along with the highest and lowest temperatures for the day.
  • Page 28 Viewing the Indoor Humidity To display the current humidity measured at the thermostat, press the HUMIDITY button of the thermostat. The display will then show the current indoor humidity along with the humidification setpoint To view the indoor humidity HUMIDITY reading, press the HUMIDITY button Current Room Humidity...

  • Page 29: Programming The Daily Schedule

    SECTION 6 Programming the Daily Schedule Section 6 Contents: Programming a Daily Schedule........6.2 Page 6.1...

  • Page 30: Programming A Daily Schedule

    Programming a Daily Schedule Press Press the PROGRAM button to enter time period programming. PROGRAM Use the Programming Worksheet on the back cover to help with this section. Select the day of week (Mo - Su) Press MODE 6:00 Start Adjust the start time for Morning.
  • Page 31 8:00 Start Adjust the start time for Day. Press MODE 8:00 Adjust the cooling setpoint for Day. (35 - 99 ) Press MODE 8:00 Adjust the heating setpoint for Day. (35 - 99 ) Press MODE 6:00 Start Adjust the start time for Evening.
  • Page 32 6:00 Adjust the heating setpoint for Evening. (35 - 99 ) Evening Press MODE I0:00 Start Adjust the start time for Night. Night Press MODE I0:00 Adjust the cooling setpoint for Night. (35 - 99 ) Night Press MODE I0:00 Adjust the heating setpoint for Night (35 - 99 )
  • Page 33 The copy command becomes available after programming the entire previous day. Select Yes to copy the previous day’s program to this day displayed. If No is selected: If Yes is selected: Selecting Yes, then pressing mode will copy the previous day’s program. If yes is selected again, Press or each time, this routine will repeat.

  • Page 34: Programming The Fan Operation

    SECTION 7 Programming the Fan Operation Section 7 Contents: Using the Fan Button....7.2 Programming the Fan....7.3 Setting the Fan-Off Time Delay..........7.4 Page 7.1...
  • Page 35 Using the Fan Button When the fan is set for automatic operation it will energize any time there is a call for heating or cooling, otherwise the fan will remain off. Pressing the FAN button will energize the fan and display the FanOn icon on the thermostat display.
  • Page 36 Programming the Fan This timer will start the fan at the top of each hour and the fan will run for the number of minutes selected in step #3. Steps 4 & 5 restrict the hours during which the programmable fan may operate; step #4 is the start time and step #5 is the stop time.
  • Page 37 Setting the Fan-Off Time Delay To increase the cooling efficiency of your unit, the thermostat may be programmed to continue running the fan after a call for cooling has been satisfied. This delay may be set for 30, 60, or 90 seconds. If the Fan Off Delay is set for zero seconds, the fan will not energize after a call for cooling has been satisfied.

  • Page 38: Thermostat Display Options

    SECTION 8 Thermostat Display Options Section 8 Contents: Turning On/Off the Backlight........8.2 Programming the Thermostat to Display Temperature in Fahrenheit or Celsius....8.2 Locking/Unlocking the Keypad........8.3 Page 8.1...
  • Page 39 Turning On/Off the Backlight Press the MODE button. While holding MODE Note: Press the MODE the MODE, press the PROGRAM button momentarily to move through the button to enter Setup screens. PROGRAM setup screens. Press and hold the MODE button to move back- Press the MODE button repeatedly wards through the MODE...

  • Page 40: Front Panel Buttons

    Locking/Unlocking the Keypad 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. The icon will appear on the display, then release the buttons.

  • Page 41: Humidification

    SECTION 9 Humidification Section 9 Contents: Configuring a Thermostat Output Jumper for Humidity Operation........9.2 Adjusting the Humidification Setpoint........9.3 Energizing the Fan with Humidification......9.4 Disclaimer: The manufacturer of this thermostat cannot be liable for misinstallation, improper connection or improper programming of the humidity functions of this thermostat that may result in water damage or mold growth.
  • Page 42 Setting a Thermostat Output Jumper for Humidity Operation To control a MISC output for humidification, place the MISC1, MISC2, or MISC3 jumper on the terminal labeled HUM (see diagram below). This will supply 24VAC to the selected MISC terminal based on the humidification programming in the following pages.
  • Page 43 Adjusting the Humidification Setpoint If your HVAC unit is equipped with a humidification system the thermostat will provide power to the appropriate terminal on the backplate of the thermostat when the humidity in the home falls below the setpoint you have chosen. The value for this setpoint ranges from 0% to 60%.
  • Page 44 Energizing the Fan with Humidification Selecting YES for this setup step will enable the Fan to automatically energize any time there is a call for humidity. If NO is selected, the Fan will not automatically energize on a call for humidity. Press the MODE button.

  • Page 45: Dehumidification

    SECTION 10 Dehumidification Section 10 Contents: Configuring a Thermostat Output Jumper for Dehumidification Operation........10.2 Adjusting the Dehumidification Setpoint........10.3 Using Your Air Conditioner to Dehumidify......10.4 Using the Reheat Function........10.5 Using the DEHUM Terminal........10.6 Page 10.1...
  • Page 46 Configuring a Thermostat Output Jumper for Dehumidification Operation To control a MISC output for dehumidification, place the MISC1, MISC2, or MISC3 jumper on the terminal labeled DEHUM (see diagram below). This will supply 24VAC to the selected MISC terminal based on the dehumidification programming in the following pages.
  • Page 47 Adjusting the Dehumidification Setpoint Dehum Terminal: If a MISC terminal selected for DEHUM operation (see page 10.2) then the thermostat will provide power to this terminal the when the humidity in the home is above the setpoint you have chosen. See page 10.6 for detailed programming instructions. To utilize this feature your HVAC unit must be equipped with a DEHUM terminal.
  • Page 48 Using Your Air Conditioner to Dehumidify If Cool to Dehumidify is on and the Humidity Module is installed, the thermostat has the ability to initiate a cooling cycle for advanced dehumidification operation. When the thermostat detects the humidity percentage is above the setpoint for dehumidification, and heating or cooling is not on, the thermostat will force the compressor to run with the fan, thus reducing moisture in the air.
  • Page 49 Using the Reheat Function This feature allows the thermostat to turn on Electric Heating (W2) during Cool to Dehumidify to maintain room temperature until the dehumidification setpoint is reached. The cooling cycle will allow for the dehumidification of the air to occur while the Electric Heating will allow for a constant room temperature.
  • Page 50 Using the Dehum Terminal If you configure a MISC output jumper for DEHUM, it may be programmed to operate in one of two ways: 1) Normally Closed (NC): The thermostat will de-energize the DEHUM terminal to allow the fan to run in low speed when there is a call for 1st stage cooling and the room humidity is greater than the dehumidification setpoint.

  • Page 51: Viewing Equipment Run-Times

    SECTION 11 Viewing Equipment Run-Times Section 11 Contents: Viewing the Heat Run-Time.........11.2 Viewing the Cool Run-Time.........11.3 Viewing the Humidifier Run-Time........ 11.4 Viewing the UV Light Run-Time.........11.5 Page 11.1...
  • Page 52 Viewing the Heat Run-Time - Energy Watch This display will track the number of hours that your heating system has been operating. Press the FAN button to reset the counter. Press the MODE button. While holding MODE Note: Press the MODE the MODE, press the PROGRAM button momentarily...
  • Page 53 Viewing the Cool Run-Time - Energy Watch This display will track the number of hours that your cooling system has been operating. Press the FAN button to reset the counter. Press the MODE button. While holding MODE the MODE, press the PROGRAM Note: Press the MODE button momentarily...
  • Page 54 Viewing the Humidification Run-Time After your humidification system has been operating for the number of days set in step #16 below, the Service Humidify icon will appear. This counter keeps track of the number of days since the Service Humidify icon was reset.
  • Page 55 Viewing the UV Light Run-Time After the UV light has been operating for the number of days set in step #17 below, the Service UV Light icon will appear. This counter keeps track of the number of days since the UV light icon was last reset.

  • Page 56: Electric Heat And Heat Pump Operation

    SECTION 12 Electric Heat and Heat Pump Operation Section 12 Contents: Viewing the Heat Pump and Reversing Valve Jumper Setting........12.2 Viewing the Electric Heat Jumper Setting.......12.3 Using Emergency Heat....12.4 Page 12.1...

  • Page 57: Reversing Valve Jumper Settings

    Viewing the Heat Pump and Reversing Valve Jumper Settings Steps 18 and 19 are ‘Read Only’ and may only be set with the jumpers on the circuit board of the thermostat (see page 5.4 of the Installation Instructions). Press the MODE button. While holding MODE Note: Press the MODE...
  • Page 58 Viewing the Electric Heat Jumper Setting Placing the jumper on ELEC will cause the thermostat to turn on the fan immediately any time there is a heat demand. Since most gas furnaces control the fan, this feature should be off unless it is necessary for the thermostat to energize the fan with first stage heat.
  • Page 59 Using Emergency Heat ENTER EMERGENCY HEAT: Only available if you have a Heat Pump installed. To initiate the Emergency Heat feature, press the FAN button. While holding the FAN button press the UP button. The Cool setpoint display will read ‘EH’ (emergency heat). I2:00 Press for Emergency Heat...

  • Page 60: Dual Fuel Operation

    SECTION 13 Dual Fuel Operation Programming the Thermostat to Operate a Dual Fuel System Advanced Setup step #21 (next page) allows this thermostat to be configured to control two heat sources for Dual Fuel operation. Dual Fuel systems utilize an outdoor temperature sensor. When the outdoor temperature is at or below the Changeover Balance Point, step #22 (next page), the primary heat source is ‘locked out’...
  • Page 61 Programming the Thermostat to Operate a Dual Fuel System Press the MODE button. While holding MODE Note: Press the MODE the MODE, press the PROGRAM button momentarily button to enter Setup screens. to move through the PROGRAM setup screens. Press and hold the MODE button to move back-...
  • Page 62 Output Matrix for Dual Fuel and Three Stage Heat Applications This table illustrates the outputs that will be energized on a call for first, second and third stage heating, based on the programming in setup steps 21 and 22 (see previous page) and the HP/GAS jumper setting on page 12.2.

  • Page 63: Timers And Deadbands

    SECTION 14 Timers and Deadbands Section 14 Contents: Adjusting the Heat/Cool Differential......14.2 Adjusting the Cycles Per Hour........14.3 Adjusting the Deadband..14.4 Adjusting the Minutes of Run-Time Before the Next Stage.......14.6 Selecting 2nd Stage Turn Off Temperature.....14.7 Page 14.1...
  • Page 64 Adjusting the Heat/Cool Differential The Heat and Cool setpoints will not be allowed to come any closer to each other than the value in this step. This minimum difference is enforced during Auto Changeover operation. Press the MODE button. While holding MODE the MODE, press the PROGRAM Note: Press the...

  • Page 65: Adjusting The Cycles Per Hour

    Adjusting the Cycles Per Hour The Cycles Per Hour setting may limit the number of times per hour your HVAC unit may energize. For example, at a setting of 6 cycles per hour the HVAC unit will only be allowed to energize once every 10 minutes.

  • Page 66: Adjusting The Deadband

    Adjusting the Deadband MULTI-STAGE OPERATION - Controls up to three Heat and two Cool stages. The 2nd Stage of heat or cool is turned on when: (A) The 1st Stage has been on for the time required (step #28, page 14.6). It is adjustable from 0-60 minutes and the default is two minutes.
  • Page 67 Adjusting the Deadband For more detailed information, please see the explanation on the previous page. Press the MODE button. While holding MODE Note: Press the MODE the MODE, press the PROGRAM button momentarily button to enter Setup screens. PROGRAM to move through the setup screens.
  • Page 68 Adjusting the Minutes of Run-Time Before the Next Stage For more detailed information, please see the explanation on page 14.4. Press the MODE button. While holding MODE Note: Press the MODE the MODE, press the PROGRAM button momentarily button to enter Setup screens. PROGRAM to move through the setup screens.
  • Page 69 Selecting nd Stage Turn Off Temperature If ON is selected, the second stage of cooling or heating will remain energized until the thermostat reaches the setpoint on the thermostat display. If OFF is selected, the second stage of cooling or heating will turn off after reaching the 1st stage deadband ( see page 14.4 for more information).

  • Page 70: Using The Programmable Output

    SECTION 15 Using the Programmable Output Section 15 Contents: Configuring a Thermostat Output Jumper for Programmable Output Operation....15.2 Time-Based Control of the Programmable Output...15.3 Temperature-Based Control of the Programmable Output..15.6 Internet/Phone Control of the Programmable Output...15.7 Page 15.1...
  • Page 71 Setting a Thermostat Jumper for Programmable Output Operation To control one of the MISC outputs using time, temperature, or Internet/phone based operation, place the MISC1, or MISC2, or MISC3 jumper on the terminal labeled PROG (see diagram below). This extra output will supply 24VAC to the selected MISC terminal based on the programming described in the following pages.

  • Page 72: Programmable Output

    Time-Based Control of the Programmable Output To operate one of the MISC outputs using time-based operation, set i8:88 Advanced Setup step #31 (below) for Time . This extra output will supply 24VAC to the selected MISC terminal, which is especially useful for devices that require a start and stop time.
  • Page 73 Time-Based Control of the Programmable Output Setup Programmable Output Polarity: NC = Normally Closed to turn off between the start and stop times in steps 35 and 36. NO = Normally Open to operate Press between the start and stop times in steps 35 and 36.
  • Page 74 Time-Based Control of the Programmable Output 9:00 Setup Stop Adjust the programmable output stop time for Monday Press If Step 33 is set for 1-Day, then Day of the Week and Copy functions do not appear or apply. MODE Select Yes to copy the previous day’s program to this day.
  • Page 75 Temperature-Based Control of the Programmable Output To operate a MISC output using temperature-based operation, program advanced setup step #31 (below) for temperature This extra output will supply 24VAC to the selected MISC terminal based on the temperature of RS1 and the setpoint in step #37 (below). Possible TEMPERATURE scenario: 1) An exhaust fan in the attic of a store that needs to be energized when the attic temperature is above 85 degrees.
  • Page 76 Internet/Phone Control of the Programmable Output To operate a MISC output using Internet/phone-based operation, program advanced setup step #31 for Aux (below). This terminal is especially useful for devices that can be energized via the Internet. Telephone control may also be available when the thermostat is connected to the Internet.

  • Page 77: Programming Remote Sensor Operation

    SECTION 16 Programming Remote Sensor Operation Section 16 Contents: Installing the Remote Sensors........16.2 Controlling or Reading the Remote Temperature (RS1)...16.3 Averaging the Remote Sensor (RS1) with the Thermostat Sensor........16.4 Page 16.1...
  • Page 78 Installing the Remote Sensors The Remote Sensor measures indoor air temperature and sends this information to the thermostat; it measures temperature with a range of 32 to 99 F. The Remote Sensor should be connected to the thermostat using solid conductor CAT 5, CAT 5e, or CAT 6 type network communication cable.
  • Page 79 Controlling or Reading the Remote Temperature (RS The thermostat may be programmed to only READ the remote sensor, or to CONTROL to the remote sensor. Refer to advanced setup step #38, below. Read Only Sensor (RS1): If step #38 is set to only READ to the remote sensor, the thermostat will not use this sensor for temperature control.
  • Page 80 Averaging the Remote Sensor (RS ) with the Thermostat Sensor If step #38 is set to control to the remote sensor, the thermostat will ignore the reading of its internal temperature sensor and only display the temperature reading from the remote sensor. The degree icon on the thermostat will blink once per second to indicate that a remote sensor reading is being displayed.
  • Page 81 SECTION 17 Programming the Dry Contact Section 17 Contents: Dry Contact Operation.... 17.2 Dry Contact Polarity....17.2 Dry Contact Programming..17.3 Page 17.1...

  • Page 82: Dry Contact Operation

    Dry Contact Operation If the dry contact is going to be used, select YES in step #40. If the dry contact is not going to be used, select NO in step #40 below. DRY CONTACT POLARITY - The terminals may be set to be Normally Open (NO) or Normally Closed (NC) in step #41.
  • Page 83 Dry Contact Programming VACATION MODE OR SERVICE THE CONDENSATE DRAIN PAN - If Vacation is selected in step #42 (below), when the dry contact is energized and the thermostat will be forced into Vacation mode (Section 20). If Service Pan is selected, when the dry contact is energized the thermostat will lockout Y1 (compressor) and write Service Pan on the display.

  • Page 84: Energy Save Operation

    SECTION 18 Energy Save Operation How to Use the Energy Save Feature If the thermostat is configured to be programmable (Section 4), and Energy Save has been selected in step #43 (below), the room will attempt to reach the selected comfort temperature at the exact time programmed into the thermostat.

  • Page 85: Programming The Run-Time Alerts

    SECTION 19 Programming Run-Time Alerts Section 19 Contents: Setting and Resetting the Service Filter (Fan Run-Time) Alert........19.2 Setting and Resetting the UV Light Run-Time Alert.....19.3 Setting and Resetting the Humidify Run-Time Alert..19.4 Page 19.1...
  • Page 86 How to Set and Reset the Service Filter (Fan Run-Time) Alert This counter keeps track of the number of hours of fan run-time whether the fan is energized in the Heating or Cooling modes, or in stand alone fan operation. The Service Filter icon will appear after the preset number of hours of fan run-time in step #45 (below) has been achieved.
  • Page 87 How to Set and Reset the UV Light Run-Time Alert This counter keeps track of the number of days since the UV Light counter has been reset. The UV Light icon will appear after the number of days has been achieved, as shown in step #46 (below). Setting the counter to zero in Step #46 will prevent the Service UV Light icon from ever appearing.
  • Page 88 How to Set and Reset the Humidifier Run-Time Alert This counter keeps track of the number of days since the Service Humidify icon was last reset; this icon will appear after the number of days set in step #47 (below) has elapsed. Setting this counter to zero in step #47 will prevent the Service Humidify icon from ever appearing.

  • Page 89: Programming The Vacation Mode

    SECTION 20 Programming Vacation Mode When the thermostat is programmed for Vacation mode, it will take effect at 12:00 am of the next day. The thermostat will control to the cooling and heating setpoints set in Vacation programming steps 2 and 3. Vacation setpoints will be enforced for the number of days specified in step #1 (0 - 99 days).
  • Page 90 Programming Vacation Mode (continued) VACATION DISPLAY - When the thermostat is placed into the Vacation mode, the thermostat will display the screen shown below. To return the thermostat to normal operation from Vacation mode, press the PROGRAM and SET CLOCK buttons and adjust the days in step #1 to zero (see previous page).

  • Page 91: Configuring The Misc Outputs

    SECTION 21 Configuring the MISC Outputs Section 21 Contents: Configuring the Jumpers..21.2 Explanation of Jumper Settings........21.3 Page 21.1...
  • Page 92 Configuring the Jumpers For additional flexibility, your thermostat has three configurable outputs. These outputs are designed to have different functions depending on how the jumpers are set (below). Each output, labeled MISC1, MISC2, and MISC3 may be set for one of the five choices available.
  • Page 93 Explanation of Jumper Settings W3 JUMPER SETTING If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC screw terminal on the backplate will control a third stage of heat. W3 MULTI-STAGE OPERATION EXPLAINED - Page 14.4 The 3rd Stage of Heat is turned on when: (A) The 1st and 2nd stages have been on for the time required (steps 28 and 29, page 14.6).
  • Page 94 Explanation of Jumper Settings (continued) HUM JUMPER SETTING If the jumper for MISC1, MISC2, or MISC3 is set to HUM, the corresponding MISC screw terminal on the backplate will control a humidification system. HUMIDIFICATION OPERATION - SECTION 9 If your HVAC unit is equipped with a humidification system the thermostat will provide power to the MISC1, MISC2, or MISC3 terminal of the thermostat when the humidity in the home falls below the humidity setpoint you have chosen.
  • Page 95 Explanation of Jumper Settings (continued) Y2 JUMPER SETTING If the jumper for MISC1 is set to Y2 the MISC1 screw terminal on the backplate will control a second stage of cooling. Y2 OPERATION - Page 14.4 Control up to two Cool stages. The 2nd Stage of heat or cool is turned on when: (A) The 1st Stage has been on for the time required (step #28, page 14.6).

  • Page 96: Factory Defaults And Calibration

    SECTION 22 Factory Defaults, Calibration, and Sensors Section 22 Contents: Resetting the Thermostat to the Factory Default Settings..22.2 Calibrating the Temperature and Humidity Sensors...22.3 Page 22.1...

  • Page 97: Factory Default Settings

    Resetting the Thermostat to the Factory Default Settings (for default values see page 24.1) 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 98: Calibrating The Temperature And Humidity Sensors

    Calibrating the Temperature and Humidity Sensors Under normal circumstances it will not be necessary to adjust the calibration of the temperature and humidity sensors. If calibration is required, please contact a trained HVAC technician to correctly perform the following procedure. I2:00 Place the thermostat in the MODE...

  • Page 99: Accessories

    SECTION 23 Accessories ACCESSORY PORT - The RJ11 Jack is used to connect the T1900 to the IR Receiver (ACC0431) for wireless communication or the EZ Programmer (ACC0432) for easy downloading or uploading of thermostat information. The Accessory Port is located on the bottom of the thermostat.

  • Page 100: Advanced Setup Table

    SECTION 24 Advanced Setup Table Description Range Step# Description Range Step# Programmable Yes/No Deadband/Temp. 14.5 0 - 10 Thermostat Swing 3rd Stage Auto Changeover Yes/No Minutes Between 14.6 0-60min Stage 1 & 2 Thermostat Programmable Fan 0:00-0:60 Minutes Between 14.6 0-60min 24 Hour Stage 2 &...
  • Page 101 SECTION 25 Index 11.2-11.5, 12.4, 22.2 24.1 fan, 1.2, 2.4, 7.2, 2nd stage front panel, 1.2 deadband, see humidity, 1.2, 5.3, Deadband 9.3, 10.3 dehum, 10.6 Accessory Port, 23.1 minutes of run- Alerts mode, 1.2, 2.3, 4.2, see Run-Time 8.3, 22.2 time, 14.4, 14.6 outdoor, 1.2, 5.2 21.5, 24.1...
  • Page 102 SECTION 25 Index Dry Contact operation, 17.2, 24.1 polarity, 17.2, 24.1 service pan, 17.3 vacation, 17.3, Factory Defaults icon, 1.4 24.1 caution, ii programming, 6.3 Dual Fuel settings, 22.2 changeover balance setting, 2.2, 3.2 resetting, 22.2 Deadband point, 13.1-13.2 Fahrenheit, 8.2 balance point, 13.1 control two heat sources, 13.1...
  • Page 103 SECTION 25 Index Green Indicator, 1.2 icon, 1.3 23.1 indicator, 1.2 mode, 2.3 program, see Program run-time, see Run- Heat Time Jumpers setpoint, 2.3-2.4, 1st stage DEHUM, 21.4 6.2-6.4 deadband, see ELEC, 12.3, 13.3 Deadband Heat Pump electric heat, 12.3, AuxHeat, 1.5 emergency heat, 13.3, 24.1...
  • Page 104 SECTION 25 Index see Keypad Lockout programmable daily schedule, 6.2- output, 15.4 icon, 1.5, 5.2 dehum terminal, mode, 1.3, 4.6-4.7 temperature, 5.2 10.6 On icon, 2.3 worksheet, back page Programmable Fan 7.3, 24.1 Programmable Output Internet/phone Manual O Reversing Valve control, 15.7 jumper setting, 15.2, changeover, 4.4, 4.6...
  • Page 105 SECTION 25 Index degree icon blink, UV light, 11.5, 24.1 Simplest Operation, 16.2-16.4 4.2-4.3 outdoor temperature, Smart Recovery, see see Outdoor Energy Save read to, 16.3 viewing, 5.2, 22.3 Reset Schedule thermostat settings, Daily, see Program see Factory Defaults 2nd stage turn off run-time temperature, Terminal, MISC, see...
  • Page 106 SECTION 25 Index resetting, see Reset run-time, see Run- Time setting, see Run-Time Vacation, button, see Buttons mode, 20.1-20.2 programming, 20.1- 20.2 setpoints, 20.1 W3, see Jumpers Warranty, 26.1 Web, 15.7 Y2, see Jumpers Page 25.6...
  • Page 107 SECTION 26 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 108 Programming Worksheet see Section 6 DAY PERIOD START TIME COOL HEAT Morning Evening Night Morning Copy Mon Evening Night Morning Copy Tue Evening Night Morning Copy Wed Evening Night Morning Copy Thu Evening Night Morning Copy Fri Evening Night Morning Copy Sat Evening Night...

This manual is also suitable for:

T1900

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