Venstar T2900SCH Owner's Manual
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Venstar T2900SCH Owner's Manual

Commercial school thermostat, programmable up to 3-heat & 2-cool
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See also: Instruction and Installation Manual
Enlarged version
Digital
Digital
Thermostat
Thermostat
Energy Saving Operation
Morning Warm-up Period
Programmable Override
Unoccupied until button press
Perfect for Classroom Operation
Setpoint Limiting Security
Separate Weekend/Weekday
Programs
99 Days of Configuration
Holiday Mode
Designed Specifically for the School Environment
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
commercial
SCHOOL THERMOSTAT
T2900SCH
PROGRAMMABLE
PROGRAMMABLE
up to 3-heat
up to 3-heat
& 2-cool
& 2-cool
HEAT
HEAT
COOL
PUMP
Soft Start Capability
Back-Lit Display
One for All Works with
Virtually All Equipment
Non-Volatile Memory
Keypad Lockout
3 Security Levels
Remote Sensor Ready
48 Hour Clock Backup
Compressor Protection
Economizer Operation

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Summary of Contents for Venstar T2900SCH

  • Page 1 Holiday Mode Designed Specifically for the School Environment 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 list of the contents within that 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 Quick Start Getting to Know Your Thermostat Setting Clock and Day Basic Operation Viewing 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 Timers and Deadbands Using the Programmable Output...

  • Page 7: Quick Start

    SECTION 1 Quick Start Section 1 Contents: Setting the Clock and Day...1.2 Selecting the Heat or Cool Mode..........1.3 Selecting Your Desired Temperature........1.4 Using the Fan Button....1.4 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 8: Setting The Clock

    MODE HUMIDITY During Setup & Programming: SET CLOCK Press the MODE and HUMIDITY buttons Pressing the UP or DOWN at the same time buttons will modify the flashing selection. Setting the Clock I2:00 Setup To adjust the Clock or Day use Press Setting the Day MODE...

  • Page 9: Selecting Heat/Cool Mode

    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 10: Selecting Desired Temperature

    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 11: Getting To Know Your Thermostat

    SECTION 2 Getting to Know Your Thermostat Section 2 Contents: Front Panel Buttons.....2.2 Display Features......2.3 Page 2.1...

  • Page 12: Front Panel

    Front Panel Warmer Button Backlit LCD Display (glows red) sometimes referred to as the UP button I2:00 AUTO Cooler Button sometimes refer- (glows blue) red to as the DOWN button Override Heat or Cool Demand Indicator Button Red = Heat, Green = Cool eries PLATINUM COMMERCIAL PROGRAMMABLE THERMOSTAT...

  • Page 13: Display Features

    Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light Outside AUTO Remote OFFON Unoccupied Override 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 14 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light Outside AUTO Remote OFFON Unoccupied Override FanOn Occupied & Unoccupied icons - Section 6 Indicates the program: Occupied or Unoccupied. Override icon - Section 6 Indicates the program is currently being overridden. Setup icon - Sections 7-20 Indicates the thermostat is in the setup mode.
  • Page 15 Display Features I8:88 Program On Setup StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light Outside AUTO Remote OFFON Unoccupied Override FanOn UV Light icon - Section 11/19 Appears when the UV bulb should be serviced under normal conditions. Adjustable from 0 - 1950 days of operation. Remote icon - Page 22.4 Indicates the remote sensor reading of the thermostat is being viewed.

  • 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: Mode

    HUMIDITY MODE During Setup & Programming: SET CLOCK Press the MODE and Pressing the UP or DOWN HUMIDITY buttons at the same time buttons will modify the flashing selection. Setting the Clock I2:00 Setup To adjust the Clock or Day use Press Setting the Day MODE...

  • Page 18: Basic Operation

    SECTION 4 Basic Operation Section 4 Contents: Programming for Auto or Program Operation....4.2 Selecting the Proper Operating Mode......4.3 Selecting Your Desired Temperature.......4.7 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 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: Temperature

    Viewing the Outdoor Temperature Requires an outdoor sensor (optional accessory) to be installed (see page 15.2 for wiring instructions). To read the temperature from the outdoor sensor, press the PROGRAM and HOLIDAY buttons. 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. The display will then show the current indoor humidity along with the humidification setpoint (Section 9). Note: The humidity reading will not appear unless the Humidity Module has been installed.

  • Page 29: Programming The Daily Schedule

    SECTION 6 Programming the Daily Schedule Section 6 Contents: Programming a Daily Schedule........6.2 Override Button Operation..6.5 Page 6.1...

  • Page 30: Programming A Daily Schedule

    Programming a Daily Schedule Press Press the PROGRAM button to enter time period programming. PROGRAM Adjust the cooling setpoint for occupied. occupied (35 - 99, OF ) Press MODE Adjust the heating setpoint for occupied. occupied (OF, 35 - 99 ) Press MODE Adjust the cooling...
  • Page 31 8:30 Start MoTuWeThFr Adjust the weekday start time. occupied Press MODE 5:00 Stop MoTuWeThFr Adjust the weekday stop time. occupied Press MODE 8:30 Start Adjust the weekend start time. To have no weekend operation, set the start time equal to occupied the stop time.
  • Page 32 8:30 Start Adjust the warm-up start time Press PROGRAM After programming for all seven days is complete, press the PROGRAM button to leave the Setup screens. If no buttons are pressed, the display will leave the setup screens after 30 seconds. PROGRAMMING TIPS The morning warm-up will bring in Occupied setpoints at the selected start time...
  • Page 33 Override Button Operation Normal Operation During school hours pressing the OVERRIDE button will force the thermostat into the Time Schedule comfort settings until the end of the Occupied period. During this Occupied period, the setpoints may be adjusted; however, the adjusted setpoints will not be remembered for the following school day.

  • Page 34: Programming The Fan Operation

    SECTION 7 Programming the Fan Operation Section 7 Contents: Using the Fan Button....7.2 Smart Fan Operation....7.2 Setting the Fan-Off Time Delay..........7.3 Fan Purge Operation....7.4 Page 7.1...

  • Page 35: Using The Fan Button

    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: Setting The Fan-Off Time Delay

    Setting the Fan-Off Time Delay To increase 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 37: Fan Purge Operation

    Fan Purge Operation When this feature is activated, the fan will turn on during an unoccupied period at a preset amount of time prior to Occupied. This preoccupancy fan purge timer may be set from zero to three hours, in 15 minute increments. Zero means this feature is turned off. Press the MODE button.

  • 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 Programming a Security Level..........8.4 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 button to enter Setup screens. PROGRAM to move through the setup screens. Press and hold the MODE Press the MODE button repeatedly button to move back- MODE wards through the...

  • Page 40: Locking/Unlocking The Keypad

    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: Programming A Security Level

    Programming a Security Level When a security level has been programmed, the thermostat will allow limited adjustment to the setpoints (steps # 8 and 9). In security levels 2 and 3, the thermostat is forced into the Program On mode. To disable the security feature, set the value in step #7 to 0;...

  • Page 42: Humidification

    SECTION 9 Humidification Section 9 Contents: Installing the Humidity Module........9.2 Setting a Thermostat Jumper for Humidity Operation....9.3 Adjusting the Humidification Setpoint........9.4 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 43 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 44 Setting a Thermostat 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 45 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 building falls below the setpoint you have chosen. The value for this setpoint ranges from 0% to 60%.

  • 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 Reheat Function........10.5 Using the DEHUM Terminal........10.6 NOTE: The dehumidification functions described in this section will only be available if a Humidity Module has been properly installed.
  • 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 programming in the following pages.
  • Page 48 Adjusting the Dehumidification Setpoint Dehum Terminal: If a MISC terminal is selected for DEHUM operation (see page 10.2), then the thermostat will provide power to this terminal when the humidity in the building is above the setpoint you have chosen. See page 10.6 for detailed programming instructions.
  • 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 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 51 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 52: 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 Override Run-Time.........11.4 Viewing the Humidifier Run-Time........ 11.5 Viewing the UV Light Run-Time.........11.6 Page 11.1...
  • Page 53 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 54 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 55 Viewing the Override Operation Run-Time This display will track the number of hours that your thermostat has been operating in the Override mode (see page 6.5 & 18.1). Press the FAN button to reset the counter. Press the MODE button. While holding MODE the MODE, press the PROGRAM Note: Press the...
  • Page 56 Viewing the Humidification Run-Time After your humidification system has been operating for the number of days set in step #17 below, the Service Humidify icon will appear. This counter keeps track of the number of days since the Service Humidify icon was reset.
  • Page 57 Viewing the UV Light Run-Time After the UV light has been operating for the number of days set in step #18 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 58: 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 59: Reversing Valve Jumper Settings

    Viewing the Heat Pump and Reversing Valve Jumper Settings Steps 19 and 20 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 60 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 61 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 62: 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 63: Adjusting The Heat/Cool Differential

    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 64: Adjusting The Cycles Per Hour

    Adjusting the Cycles Per Hour The Cycles Per Hour setting limits 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 65: 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 #27, page 13.6). It is adjustable from 0-60 minutes and the default is two minutes.
  • Page 66 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 67: 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 68: 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 69: Using The Programmable Output

    SECTION 14 Using the Programmable Output Section 14 Contents: Configuring a Thermostat Output Jumper for Programmable Output Operation....14.2 Time-Based Control of the Programmable Output...14.3 Temperature-Based Control of the Programmable Output..14.6 Internet/Phone Control of the Programmable Output...14.7 Page 14.1...
  • Page 70 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 71: 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 #30 (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 72 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 34 and 35. NO = Normally Open to operate Press between the start and stop times in steps 34 and 35.
  • Page 73 Time-Based Control of the Programmable Output 9:00 Setup Stop Adjust the programmable output stop time for Monday Press If Step 32 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 74 Temperature-Based Control of the Programmable Output To operate a MISC output using temperature-based operation, program advanced setup step #30 (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 #36 (below). Possible TEMPERATURE scenario: 1) An exhaust fan in the attic of a store that needs to be energ- ized when the attic temperature is above 85 degrees.
  • Page 75 Internet/Phone Control of the Programmable Output To operate a MISC output using Internet/phone-based operation, program advanced setup step #30 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 76: Programming Remote Sensor Operation

    SECTION 15 Programming Remote Sensor Operation Section 15 Contents: Installing the Remote Sensors........15.2 Controlling or Reading the Remote Temperature (RS1)...15.3 Averaging the Remote Sensor (RS1) with the Thermostat Sensor........15.4 Page 15.1...
  • Page 77 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 is equipped with an OVERRIDE button which will place the thermostat into the override mode for up to four hours (see page 6.5 &...
  • Page 78 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 #37, below. Read Only Sensor (RS1): If step #37 is set to only READ to the remote sensor, the thermostat will not use this sensor for temp- erature control.
  • Page 79 Averaging the Remote Sensor (RS ) with the Thermostat Sensor If step #37 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 80: Dry Contact Operation

    SECTION 16 Programming the Dry Contact Section 16 Contents: Dry Contact Operation.... 16.2 Dry Contact Polarity....16.2 Dry Contact Programming..16.3 Random Start Operation..16.4 Page 16.1...

  • Page 81: Dry Contact Operation

    Dry Contact Operation If the dry contact is going to be used, select YES in step #39. If the dry contact is not going to be used, select NO in step #39 below. DRY CONTACT POLARITY - The terminals may be set to be Normally Open (NO) or Normally Closed (NC) in step #40.
  • Page 82 Dry Contact Programming OCCUPIED OR SERVICE THE CONDENSATE DRAIN PAN - If Occupied is selected in step #41 (below), when the dry contact is energized the thermostat will be forced into Occupied setpoints and the Occupied icon will blink (Section 6). The thermostat must be in Program On mode for this feature to have any effect.

  • Page 83: Light Activated Operation

    Random Start Operation This feature allows a 2 to 30 second delay before energizing the thermostat outputs after any of these events: Loss of Power to the thermostat: When power to the thermostat is interrupted and then restored, Random Start will lockout the outputs of the thermostat for a random amount of time.

  • Page 84: Light Activated Operation

    SECTION 17 Light Activated Operation Section 17 Contents: Setting up the Thermostat for Light Activated Operation........17.2 Adjusting the Light Sensor..17.3 Page 17.1...

  • Page 85: Light Activated Operation

    Setting up the Thermostat for Light Activated Operation A light sensor is provided on the thermostat for light activation. If the thermostat is set up to be light activated, the thermostat will enter Occupied and blink the Occupied icon when a light source is detected.
  • Page 86 Adjusting the Light Sensor The light sensor can be adjusted for variable degrees of sensitivity. The sensitivity adjustment screw is located on the side of the thermostat, as illustrated below. Turning the screw clockwise increases the sensitivity of the sensor to light. To check for correct sensitivity, place the thermostat in the Program On mode.

  • Page 87: Override Timer Operation

    SECTION 18 Override Timer Operation How to Use the Override Timer During programmed, unoccupied periods, pressing the OVERRIDE button will temporarily force the thermostat into Occupied comfort settings for the number of hours programmed in step #43, below. For example, if the thermostat is programmed to be occupied from 8:00 AM to 5:00 PM, but a cleaning crew is scheduled to come into the building from 7:00 PM to 9:00 PM, then this setup step can be programmed for two hours.

  • Page 88: Programming The Run-Time Alerts

    SECTION 19 Programming Run-Time Alerts Section 19 Contents: Setting and Resetting the Service Filter (Fan Run-Time) Alerts........19.2 Setting and Resetting the UV Light Run-Time Alerts.....19.3 Setting and Resetting the Humidify Run-Time Alerts..19.4 Page 19.1...
  • Page 89 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 90 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 91 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 92: Programming The Holiday Mode

    SECTION 20 Programming Holiday Mode When the thermostat is programmed for a Holiday mode, it will take effect at 12:00 am of the next day. In order for the Holiday mode to take effect the thermostat must be in the Program On mode. The thermostat will control to the Unoccupied cooling and heating setpoints set in Section 6, pages 6.2 and 6.3.

  • Page 93: Programming Holiday Mode

    Programming Holiday Mode (continued) HOLIDAY DISPLAY - When the thermostat is placed into the Holiday mode, the thermostat will display the screen shown below. To return the thermostat to normal operation from Holiday mode, press the HOLIDAY button and adjust the number of days in step #1 to zero (see previous page).

  • Page 94: 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 95 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 96 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 27 and 28, page 13.6).
  • Page 97 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 and the Humidity Module (sold separately) has been installed, 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 98 Explanation of Jumper Settings (continued) ECON JUMPER SETTING If the jumper for MISC2 or MISC3 is set to ECON, the corresponding MISC screw terminal on the backplate will be connected to an economizer. ECONOMIZER OPERATION - If your HVAC unit is equipped with an economizer system, the thermostat will provide power to the MISC2 or MISC3 terminal of the thermostat when the thermostat is in an occupied time period.

  • Page 99: Factory Defaults, Calibration, And Sensors

    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 Viewing the Remote Temperature Sensors....22.4 Page 22.1...

  • Page 100: 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 101: 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 102 Viewing the Remote Temperature Sensors Each sensor is programmed with a “hard-coded” address that the thermostat “scans” in order from lowest to highest. Therefore, in order to determine which sensor corresponds to the number on the setup screen you will need to disconnect each sensor from the group in order to determine which sensor number reads dashes.

  • Page 103: Accessories

    SECTION 23 Accessories ACCESSORY PORT - The RJ11 Jack is used to connect the T2900SCH to the IR Receiver (ACC0431) for wireless communi- cation 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 104: Advanced Setup Table

    SECTION 24 Advanced Setup Table Step# Description Range Step# Description Range Df* Yes/No Minutes Between Programmable 13.6 0-60min Thermostat Stage 1 & 2 Yes/No Minutes Between 13.6 0-60min Auto-Changeover Thermostat Stage 2 & 3 Fan Off Delay 0, 30, 60, 2nd Stage turn off at 13.7 On/Off...
  • Page 105 SECTION 25 Index front panel, 2.2 dehum, 10.6 humidity, 2.2, 5.3, minutes of run- 9.4, 10.4 time, 13.4, 13.6 Holiday, 2.2, 5.2, 21.5, 24.1 15.3, 20.1 turn off Accessory Port, 23.1 Alerts mode, 1.3, 2.2, 4.2, temperature, 8.3, 22.2 13.7, 24.1 see Run-Time Auto outdoor, 2.2, 5.2...
  • Page 106 SECTION 25 SECTION 25 Index Index display, 2.4 service pan, 16.3 Fan, setting, 1.2, 3.2 Random start, 16.4 button function, see Deadband Buttons 1st stage, 13.4-13.5, off time delay, 7.3, 24.1 24.1 2nd stage, 13.4-13.5, on during heat, see 21.3, 21.5, 24.1 Electric Heat 3rd stage, 13.4-13.5, Economizer...
  • Page 107 SECTION 25 Index 12.4 minutes of run- icon, 2.5, 5.2 time, 13.4, 13.6, security setpoint, 8.4 24.1 temperature, 5.2 2nd stage Holiday Jumpers deadband, see button, see Buttons DEHUM, 21.4 Deadband light activation, 17.2 ECON, 21.5 emergency heat, mode, 20.1-20.2 ELEC, 12.3 12.4 programming, 20.1-...
  • Page 108 SECTION 25 SECTION 25 Index Index random start, 16.4 Thermostat, 4.2, Off Mode, 1.3, 2.3 sensor, 17.2 4.4-4.5 Outdoor adjustment, 17.3 Normally button, see Buttons Locked Indication Open/Closed, icon, 2.3 see Keypad Lockout dry contact, 16.2 sensor, 2.3, 5.2, 13.1- programmable 13.2, 15.2, 22.4 icon, 2.5, 5.2...
  • Page 109 SECTION 25 Index override, see Override icon, 2.5 setpoint limits, 8.4 outdoor temperature, tips, 6.4 see Outdoor worksheet, back page read to, 15.3 viewing, 22.4, 24.1 Programmable Output Schedule, Daily, Internet/phone wiring, 15.2 see Program control, 14.7 Reset 2nd stage turn off jumper setting, 14.2, thermostat settings, temperature,...
  • Page 110 SECTION 25 SECTION 25 Index Index security, 8.4 operation, 6.4 unoccupied, 6.2-6.3 override, see Setup Icon, 2.4 Override Simplest Operation, setpoint, 6.2-6.3 4.2-4.3 UV Light Smart Fan, 7.2 icon, 2.5 resetting, see Reset run-time, see Run- Time setting, see Run-Time Terminal, MISC, see MISC Thermostat Sensor...
  • Page 111 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.

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