Venstar T1800 Owner's Manual
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Venstar T1800 Owner's Manual

Residential 7-day programmable up to 3-heat & 2-cool
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See also: Instruction and Installation Manual
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 800
7-DAY
7-DAY
PROGRAMMABLE
PROGRAMMABLE
up to
3-heat
up to
3-heat
& 2-cool
& 2-cool
HEAT
HEAT
COOL
PUMP
Outdoor Sensor Ready
with High/Low Readouts
for the Day
Accepts Optional Humidity Module:
Controls Humidification and
Dehumidification
Accepts EZ Programmer
Accepts Optional IR Remote Control
Accepts Comfort Call
Phone Control Accessory

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Summary of Contents for Venstar T1800

  • Page 1 Accepts Optional IR Remote Control Accepts Comfort Call 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 operate with regards to 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 Temperature and Humidity Sensors Programming the Daily Schedule Programming the Fan Operation Thermostat Display Options Humidification Dehumidification Viewing Equipment Run-Times Electric Heat and Heat Pump Operation Timers and Deadbands Programming Remote...

  • 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 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. AUTO - Indicates the system will automatically changeover between heat and cool modes as the temperature varies.
  • Page 10 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter 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 6-17 Indicates the thermostat is in the setup mode.
  • Page 11 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter UV Light Outside AUTO Vacation OFFON Morning DayNight Evening FanOn Vacation icon - Section 17 Indicates the thermostat has Vacation setpoints in use. AuxHeat icon - Page 13.4 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 13.2. Adjust the desired I2:00 set temperature with the AUTO...

  • Page 26: Viewing Temperature And Humidity Sensors

    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

    Viewing the Outdoor Temperature This requires an outdoor sensor (optional accessory) to be installed (see page 14.2 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 Requires the Humidity Module (optional accessory) to be installed. To display the current humidity at the thermostat, press the HUMIDITY button of the thermostat. The display will then show the current indoor humidity along with the humidification setpoint (Section 9).

  • 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: Installing the Humidity Module........9.2 Configuring a Thermostat Output Jumper for Humidity Operation........9.3 Adjusting the Humidification Setpoint........9.4 Energizing the Fan with Humidification......9.5 NOTE: The humidification functions described in this section will only be available if a Humidity Module has been properly installed. Disclaimer: The manufacturer of this thermostat cannot be liable for misinstallation, improper connection or improper programming of...
  • Page 42 Installing the Humidity Module To install the Humidity Module the thermostat must be detached from the back plate. Plug the Humidity Module into the Humidity Module connector as shown in Figure 2 below. Follow the detailed instructions included with the Humidity Module accessory. Once the Humidity Module has been installed, you must adjust the Humidity jumper setting to HUM as shown in Figure 1 below.
  • Page 43 Setting a Thermostat Output Jumper for Humidity Operation To control a MISC output for humidification, install the Humidity Module and place the Humidity Jumper on HUM (see previous page). Then place the MISC1, MISC2, or MISC3 jumper on the terminal labeled HUM (see diagram below).
  • Page 44 Adjusting the Humidification Setpoint If your HVAC unit is equipped with a humidification system and the Humidity Module has been installed, 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 45 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. The HUM/NO HUM jumper must be set for HUM in order to access this setup step. If NO is selected, the Fan will not automatically energize on a call for humidity.

  • Page 46: 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 DEHUM Terminal........10.5 NOTE: The dehumidification functions described in this section will only be available if a Humidity Module has been properly installed. For instructions on installing the Humidity Module please see page 9.2.
  • Page 47 Setting a Thermostat Jumper for Dehumidification Operation To control a MISC output for dehumidification, install the Humidity Module and place the Humidity Jumper on HUM (see page 9.2). Then 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 48 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 49 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 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 Humidifier Run-Time........ 11.2 Viewing the UV Light Run-Time.........11.3 Page 11.1...
  • Page 52 Viewing the Humidification Run-Time After your humidification system has been operating for the number of days set in step #13 below, the Service Humidify icon will appear. This counter keeps track of the number of days since the Service Humidify icon was reset.
  • Page 53 Viewing the UV Light Run-Time After the UV light has been operating for the number of days set in step #14 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 54: 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 55: Reversing Valve Jumper Settings

    Viewing the Heat Pump and Reversing Valve Jumper Settings Steps 15 and 16 are ‘Read Only’ and may only be set with the jumpers on the circuit board of the thermostat. Press the MODE button. While holding MODE Note: Press the MODE the MODE, press the PROGRAM button momentarily...
  • Page 56 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 57 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 58: Timers And Deadbands

    SECTION 13 Timers and Deadbands Section 13 Contents: Adjusting the Heat/Cool Differential......13.2 Adjusting the Cycles Per Hour........13.3 Adjusting the Deadband..13.4 Adjusting the Minutes of Run-Time Before the Next Stage.......13.6 Selecting 2nd Stage Turn Off Temperature.....13.7 Page 13.1...
  • Page 59 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 60: 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 61: 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 #23, page 13.6). It is adjustable from 0-60 minutes and the default is two minutes.
  • Page 62 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 63: Adjusting The Minutes Of Run-Time Before The Next Stage

    Adjusting the Minutes of Run-Time Before the Next Stage For more detailed information, please see the explanation on page 13.4. 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 64: Selecting 2Nd Stage Turn

    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 13.4 for more information).

  • Page 65: Programming Remote Sensor Operation

    SECTION 14 Programming Remote Sensor Operation Section 14 Contents: Installing the Remote Sensors........14.2 Controlling or Reading the Remote Temperature (RS1)...14.3 Page 14.1...
  • Page 66 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 67 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 #26, below. Read Only Sensor (RS1): If step #26 is set to only READ to the remote sensor, the thermostat will not use this sensor for temperature control.

  • Page 68: Energy Save Operation

    SECTION 15 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 #27 (below), the room will attempt to reach the selected comfort temperature at the exact time programmed into the thermostat.

  • Page 69: Programming The Run-Time Alerts

    SECTION 16 Programming Run-Time Alerts Section 16 Contents: Setting and Resetting the Service Filter (Fan Run-Time) Alert........16.2 Setting and Resetting the UV Light Run-Time Alert.....16.3 Setting and Resetting the Humidify Run-Time Alert..16.4 Page 16.1...
  • Page 70 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 #29 (below) has been achieved.
  • Page 71 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 #30 (below). Setting the counter to zero in Step #30 will prevent the Service UV Light icon from ever appearing.
  • Page 72 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 #31 (below) has elapsed. Setting this counter to zero in step #31 will prevent the Service Humidify icon from ever appearing.

  • Page 73: Vacation Mode

    SECTION 17 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 74 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 75: Configuring The Misc Outputs

    SECTION 18 Configuring the MISC Outputs Section 18 Contents: Configuring the Jumpers..18.2 Explanation of Jumper Settings........18.3 Page 18.1...
  • Page 76 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 77 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 13.4 The 3rd Stage of Heat is turned on when: (A) The 1st and 2nd stages have been on for the time required (steps #23 and #24 page 13.6).
  • Page 78 Explanation of Jumper Settings (continued) DEHUM JUMPER SETTING If the jumper for MISC1, MISC2, or MISC3 is set to DEHUM, the corresponding MISC screw terminal on the backplate will be connected to the dehumidification terminal of a furnace board. NOTE: Not all furnaces have a dehumidification terminal. DEHUMIDIFICATION OPERATION - SECTION 10 If your HVAC unit is equipped with a dehumidification system the thermostat will operate in one of two ways.
  • Page 79 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 13.4 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 #23, page 13.6).

  • Page 80: Factory Defaults And Calibration

    SECTION 19 Factory Defaults, Calibration, and Sensors Section 19 Contents: Resetting the Thermostat to the Factory Default Settings..19.2 Calibrating the Temperature and Humidity Sensors...19.3 Page 19.1...

  • Page 81: Factory Default Settings

    Resetting the Thermostat to the Factory Default Settings (for default values see page 21.1) 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 82: 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 83: Accessories

    SECTION 20 Accessories ACCESSORY PORT - The RJ11 Jack is used to connect the T1800 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 84: Advanced Setup Table

    SECTION 21 Advanced Setup Table Description Range Step# Description Range Step# Programmable Yes/No Cycles Per Hour 13.3 d1, d 2-6 Thermostat Deadband/Temp. 13.5 1 - 6 Auto-Changeover Yes/No Swing 1st Stage Deadband/Temp. 13.5 0 - 10 Thermostat Programmable Fan 0:00-0:60 Swing 2nd Stage 24 Hour Deadband/Temp.
  • Page 85 SECTION 22 Index outdoor, 1.2, 5.2 time, 13.4, 18.5, program, 1.2, 4.2, 21.1 turn off set clock, 1.2, 2.2, temperature, 17.1 13.7, 21.1 Accessory Port, 20.1 Alerts up, 1.2, 2.2, 8.3, Y2 operation, 18.5 see Run-Time 12.4 deadband, see vacation, 1.2, 17.1 Deadband Auto droop, see Deadband...
  • Page 86 SECTION 22 Index setting, 1.3, 2.2 Energy Save, 15.1 Deadband EZ Programmer, 20.1 1st stage, 13.4-13.5, 18.3, 18.5, 21.1 2nd stage, 13.4-13.5, Gas Furnace 13.7, 18.3, 18.5, 21.1 control the fan, 12.3 3rd stage, 13.4-13.5, jumper, 12.3 18.3, 21.1 Green Indicator, 1.2 F, 8.2, 21.1 Dehumidify Factory Defaults...
  • Page 87 SECTION 22 Index W3, 18.3 IR Remote Control, icon, 1.4, 5.2 AuxHeat icon, 1.5 20.1 temperature, 5.2 deadband, see Deadband droop, see Deadband electric/heat pump, 12.2 icon, 1.3 Jumpers Manual indicator, 1.2 DEHUM, 18.3 changeover, 4.4, 4.6 mode, 2.3 ELEC, 12.3 cool, 4.3 program, see Program electric heat, 12.3...
  • Page 88 SECTION 22 Index UV light, 11.3, 21.1 O Reversing Valve, Remote Sensor 12.2 calibrate, 19.3 Off Mode, 1.3, 2.3 control to, 14.3- Schedule Outdoor 14.4, 21.1 button, see Buttons degree icon blink, daily, see Program icon, 1.3 14.2-14.3 2nd stage turn off outdoor temperature, temperature, sensor, 1.3, 5.2, 14.3...
  • Page 89 SECTION 22 Index Vacation, Terminal, MISC, see MISC button, see Buttons Thermostat Sensor mode, 17.1-17.2 programming, 17.1- calibrate, 19.3 Time, see Clock 17.2 Time Delay, setpoints, 17.1 compressor lockout, 13.3 cycles per hour, 13.3, 21.1 1st to 2nd stage, 13.6, 21.1 W3, see Jumpers 2nd to 3rd stage, Warranty, 23.1...
  • Page 90 SECTION 23 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 91 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...

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