residential THERMOSTAT Digital Thermostat T1900 7-DAY PROGRAMMABLE up to 3-heat & 2-cool HEAT COOL HEAT PUMP with HUMIDITY CONTROL Control up to 3 Heat & 2 Cool Stages 3 Configurable Outputs Adjustable 2nd & 3rd Stage Timers & Deadbands Backlit Display & Button Legends Aux Heat Indicator 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 Ac
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 YOUR WARRANTY. MISC3 MISC3 OK NOTE: Due to variations in environmental conditions, it is not always possible to achieve the desired humidification or dehumidification setpoint. This device complies with Part 15 of the FCC Rules.
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 # and title of section Section 14 Contents: Adjusting the Heat/Cool Differential..............................14.2 Adjusting the Cycles Per Hour..................................14.
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. Cool Setpoint: The warmest temperature that the space should rise to before cooling is turned on (without regards to deadband).
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 Using the Programmable Output Programming Remote Sensor Operation Dry Contact Operation Energy Save Operation Programming the RunTi
SECTION 1 Getting to Know Your Thermostat 1 Section 1 Contents: Front Panel Buttons.....................1.2 Display Features...........................1.3 Page 1.
1 Front Panel Backlit LCD Display I2:00 Warmer Button (glows red) [ ] sometimes referred to as the UP button 74 Pm Mo COOL AUTO 72 HEAT Cooler Button (glows blue) Heat or Cool Demand Indicator Mode Button Red = Heat, Green = Cool PLATINUM [ eries COMMERCIAL PROGRAMMABLE THERMOSTAT I2:00 Su Pm 74 COOL AUTO 72 HEAT FAN OUTDOOR HUMIDITY PROGRAM SET CLOCK MODE VACATION QUICK RELEASE FOR ACCESSORY PORT (pg. 23.1) FAN OUTDOOR HUMIDITY PROGRAM SET CLOCK VACATION Page 1.
11 Display Features I8:88 StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light AUTO OFFON 88 I88 88 Am Program On Setup Pm Morning DayNight Evening FanOn HI COOL Outside Vacation AUXHEAT LO 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.
Display Features 1 I8:88 StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light AUTO OFFON 88 I88 88 Am Program On Setup Pm HI COOL Outside Vacation AUXHEAT Morning DayNight Evening FanOn LO 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. Fan On icon - Section 7 Indicates constant, continuous fan operation.
1 Display Features I8:88 StartStop SuMoTuWeThFrSa DeHumidify Service Filter Pan UV Light AUTO OFFON 88 I88 88 Am Program On Setup Pm HI COOL Outside Vacation AUXHEAT Morning DayNight Evening FanOn LO 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.
SECTION 2 Quick Start 2 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 2.
GRAM SET CLOCK 2 MO VACATION Press the SET CLOCK button During Setup & Programming: Setting the Clock I2:00 Am I Setup Pressing the UP or DOWN buttons will modify the flashing selection. To adjust the Clock or Day use Press Setting the Day MODE 2 Setup Mo Press the SET CLOCK button to return to normal operation. GRAM SET CLOCK MO VACATION Page 2.2 Buttons. To adjust the time by hours press and hold the FAN button while pressing the UP or DOWN buttons.
Selecting the Heat or Cool Mode 2 Select Mode by Pressing the MODE Button Heating Only The HEAT setting indicates the temperature the room has to reach before the furnace will turn on to heat the room. Cooling Only The COOL setting indicates the temperature the room has to reach before the air conditioner will turn on to cool the room. Heating or Cooling AUTO will automatically select heat or cool based on room temperature demand.
Selecting Your Desired Temperature (adjusting the setpoints) 2 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. I2:00 Su Adjust the desired set temperature with the 76 70 68 Pm COOL AUTO HEAT buttons. HEAT OR COOL MODE Pressing the UP or DOWN buttons in Heat or Cool mode will adjust only the heat or cool set temperature. I2:00 Su 70 Pm Adjust the desired set temperature with the 76 COOL buttons.
SECTION 3 Setting the Clock and Day 3 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.
GRAM SET CLOCK MO During Setup & Programming: Pressing the UP or DOWN buttons will modify the flashing selection. VACATION Press the SET CLOCK button 3 Setting the Clock I2:00 Am I Setup To adjust the Clock or Day use Press Setting the Day MODE 2 Setup Mo Press the SET CLOCK button to return to normal operation. GRAM SET CLOCK MO VACATION Page 3.2 buttons. To adjust the time by hours press and hold the FAN button while pressing the UP or DOWN buttons.
SECTION 4 Basic Operation 4 Section 4 Contents: Programmable or NonProgrammable 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.
Programmable or Non-Programmable Thermostat 4 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. Select ‘YES’ if you would like your thermostat to be programmable, then the Program mode will be accessible through the use of the MODE button.
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. 4 The thermostat may be programmed to function as a Heat Only or Cool Only thermostat by selecting ‘NO’ in the setup screen below. This will lockout the Auto Changeover screen and only allow the Off, Heat, Cool, and Program On screens to be accessed.
Operating Mode when the Thermostat is Configured to be: 4 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 Heating Only The HEAT setting indicates the temperature the room has to reach before the furnace will turn on to heat the room.
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 4 Select the Mode by Pressing the MODE Button Heating Only The HEAT setting indicates the temperature the room has to reach before the furnace will turn on to heat the room.
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 4 following screens will be available by pressing the MODE button. Select the Mode by Pressing the MODE Button Heating Only The HEAT setting indicates the temperature the room has to reach before the furnace will turn on to heat the room.
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. 4 Select the Mode by Pressing the MODE Button Heating Only The HEAT setting indicates the temperature the room has to reach before the furnace will turn on to heat the room.
Selecting Your Desired Temperature (adjusting setpoints) 4 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. I2:00 Su 76 70 68 Pm Adjust the desired set temperature with the COOL AUTO HEAT buttons. HEAT OR COOL MODE Pressing the UP or DOWN buttons in Heat or Cool modes will adjust only the heat or cool set temperature.
SECTION 5 Viewing the Temperature and Humidity Sensors 5 Section 5 Contents: Viewing the Outdoor Temperature..............................5.2 Viewing the Indoor Humidity....................................5.3 Page 5.
Viewing the Outdoor Temperature (RS2) 5 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. The day starts at 12:00 am. N OUTDOOR HUM Press the OUTDOOR button.
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 HUMIDITY 5 To view the indoor humidity reading, press the HUMIDITY button Current Room Humidity 40 0 Setup Humidify I Press HUMIDITY Press the HUMIDITY button again to return the display to normal operation.
SECTION 6 Programming the Daily Schedule Section 6 Contents: 6 Programming a Daily Schedule...................................6.2 Page 6.
Programming a Daily Schedule Press PROGRAM Press the PROGRAM button to enter time period programming. Use the Programming Worksheet on the back cover to help with this section. 6 Mo Select the day of week (Mo - Su) Press MODE Adjust the start time for Morning. 6:00 Mo Am Start Morning Press MODE Adjust the cooling setpoint for Morning. (35 - 99 ) 6:00 Mo Am 78 COOL Morning Press MODE Adjust the heating setpoint for Morning. (35 - 99 ) 6:00 Mo Am 78 COOL Morning Page 6.
Adjust the start time for Day. 8:00 Mo Am Start Day Press MODE 6 8:00 Mo 85 Am COOL Adjust the cooling setpoint for Day. (35 - 99 ) Day Press MODE Adjust the heating setpoint for Day. 8:00 Mo 85 Am COOL 62 HEAT (35 - 99 ) Day Press MODE Adjust the start time for Evening. 6:00 Mo Pm Start Evening Press MODE Adjust the cooling setpoint for Evening. 6:00 Mo Pm 78 COOL (35 - 99 ) Press Evening Page 6.
Adjust the heating setpoint for Evening. 6:00 Mo 78 Pm COOL 70 HEAT (35 - 99 ) Evening Press MODE Adjust the start time for Night. I0:00 Mo 6 Pm Start Night Press MODE Adjust the cooling setpoint for Night. (35 - 99 ) I0:00 Mo Pm 82 COOL Night Press MODE Adjust the heating setpoint for Night I0:00 Mo Pm 82 COOL (35 - 99 ) Night 62 HEAT Press MODE Continued Page 6.
The copy command becomes available after programming the entire previous day. Yes Tu 6 Select Yes to copy the previous day’s program to this day displayed. No If No is selected: If Yes is selected: Press MODE Selecting Yes, then pressing mode will copy the previous day’s program. If yes is selected again, or each time, this routine will repeat. Press MODE If No is selected, as in previous steps, flashing prompts for input will appear for the four time periods for the next day.
SECTION 7 Programming the Fan Operation Section 7 Contents: 7 Using the Fan Button.................7.2 Programming the Fan................7.3 Setting the Fan-Off Time Delay..........................................7.4 Page 7.
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. To operate the fan in the automatic mode, press the FAN button again and the FanOn icon will disappear. Press 7 I2:00 Su FAN 76 70 68 Pm COOL AUTO HEAT FanOn Fan On indicates constant fan operation.
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. Selecting the same start and stop times will cause the fan to operate 24 hours a day. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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. 7 MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
SECTION 8 Thermostat Display Options Section 8 Contents: Turning On/Off the Backlight...................................8.2 8 Programming the Thermostat to Display Temperature in Fahrenheit or Celsius..............8.2 Locking/Unlocking the Keypad......................................8.3 Page 8.
Turning On/Off the Backlight MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Press the MODE button repeatedly until this setup screen appears. 8 Setup Select backlight operation: AUTO - Light from 6pm to 6am nightly. ON - Light continuously. OFF - Light for 8 seconds after a button press. Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens.
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. I2:00 Su Press all three buttons in the order outlined above for keypad lockout 85 65 55 Pm COOL AUTO HEAT MODE To unlock the keypad, press and hold the MODE button.
SECTION 9 Humidification Section 9 Contents: 9 Configuring a Thermostat Output Jumper for Humidity Operation...................................9.2 Adjusting the Humidification Setpoint.....................................9.3 Energizing the Fan with Humidification..........................9.
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. Only one of the three outputs (MISC1, MISC2, or MISC3) is required to have this jumper. For more information regarding the MISC1, MISC2, and MISC3 outputs, please see section 21.
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%. NOTE: Due to variations in environmental conditions, it is not always possible to achieve the desired humidification or dehumidification setpoint.
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. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Press the MODE button repeatedly until this setup screen appears. Note: Press the MODE button momentarily to move through the setup screens.
SECTION 10 Dehumidification Section 10 Contents: 10 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.
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. Only one of the three outputs (MISC1, MISC2, or MISC3) is required to have a jumper. For more information regarding the MISC1, MISC2, and MISC3 outputs, please see section 21.
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.
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.
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. If Reheat is enabled the Aux icon will appear on the display during Cool to Dehumidify operation. MODE PROGRAM 10 MODE Press the MODE button.
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.
SECTION 11 Viewing Equipment Run-Times Section 11 Contents: 11 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.
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. MODE PROGRAM MODE Press FAN Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Press the MODE button repeatedly until this setup screen appears. 0 Counts the number of hours Heat has been running. Press FAN to reset the Energy Watch* Heat counter. (0 - 1999 hrs.
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. MODE PROGRAM MODE Press 11 FAN Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens.
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. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Press the MODE button repeatedly until this setup screen appears.
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. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens.
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 12 Page 12.
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). MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Press the MODE button repeatedly until this setup screen appears.
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. Step 20 is ‘Read Only’ and may only be set with the jumpers on the circuit board of the thermostat (see page 5.3 of the Installation Instructions). MODE PROGRAM MODE Press the MODE button.
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 Su Press for Emergency Heat FAN 12 73 Pm 74 HEAT OPERATION: During Emergency Heat operation the thermostat will turn on the fan and the 2nd stage of heat when there is a demand for heat.
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’ and the heat source connected to W3 is energized.
Programming the Thermostat to Operate a Dual Fuel System Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. MODE PROGRAM Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens. Press the MODE button repeatedly until this setup screen appears. MODE If the HP/GAS Jumper is not set for HP, then steps 21 and 22 will be unavailable (see Install Manual pg. 5.4).
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. For example, in the first section of this matrix the thermostat has been programmed to operate a Heat Pump Dual Fuel system based on a Balance Point.
SECTION 14 Timers and Deadbands Section 14 Contents: 14 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.
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. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens.
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. The Cycles Per Hour limit may be overridden and reset by pressing the UP or DOWN buttons on the thermostat. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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. And (B) The temperature spread from the setpoint is equal to or greater than: the setpoint plus the 1st stage deadband (step #25, next page), plus the 2nd stage deadband (step #26, next page).
Adjusting the Deadband For more detailed information, please see the explanation on the previous page. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Press the MODE button repeatedly until this setup screen appears. Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens. 25 2 26 2 27 2 Setup Adjust the deadband for the 1st stage.
Adjusting the Minutes of Run-Time Before the Next Stage For more detailed information, please see the explanation on page 14.4. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens. Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move backwards through the setup screens. Press the MODE button repeatedly until this setup screen appears.
Selecting 2nd 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). Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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 15 Programmable Output...........15.7 Page 15.
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. Only one of the three outputs (MISC1, MISC2, or MISC3) is required to have this jumper.
Time-Based Control of the Programmable Output To operate one of the MISC outputs using time-based operation, set Advanced Setup step #31 (below) for Time i8:88. This extra output will supply 24VAC to the selected MISC terminal, which is especially useful for devices that require a start and stop time. Refer to page 14.4 - 14.5 for more details on programming this output. Possible TIME scenarios: 1) An exterior lighting system that needs to be energized every day between the hours of 8pm and 1am.
Time-Based Control of the Programmable Output Setup NC 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 between the start and stop times NO in steps 35 and 36. Press MODE 7 Setup 7-Day Select 7-Day or 1-Day Programming: 7-Day = Different program for each day. 1-Day = Same program 1-Day every day.
Time-Based Control of the Programmable Output 9:00 Mo Pm Stop 36 Setup Adjust the programmable output stop time for Monday If Step 33 is set for 1-Day, then Day of the Week and Copy functions do not appear or apply. Press MODE Yes Select Yes to copy the previous day’s program to this day. Tu If No is selected: No If Yes is selected: Press FAN Selecting Yes, then pressing FAN will copy the previous day’s program. If yes is selected each time, this routine will repeat.
Temperature-Based Control of the Programmable Output To operate a MISC output using temperature-based operation, program advanced setup step #31 (below) for temperature 88 . 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. MODE PROGRAM MODE OFF Press the MODE button.
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. Possible AUX scenarios: 1) Arm the alarm system in your home after you have left for the day. 2) Turn on your spa before arriving home.
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 16 Page 16.
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. This is an unshielded cable with four twisted pairs of 24 gauge solid wire; DO NOT use stranded cable. The cable length should not exceed 250 feet.
Controlling or Reading the Remote Temperature (RS1) 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. This sensor may be viewed by pressing the OUTDOOR button on the thermostat and then pressing the MODE button.
Averaging the Remote Sensor (RS1) 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. If step #39 is set to ON (see below), the thermostat will average its internal sensor with the wired temperature sensor connected to RS1.
SECTION 17 Programming the Dry Contact Section 17 Contents: Dry Contact Operation............ 17.2 Dry Contact Polarity.................17.2 Dry Contact Programming......17.3 17 Page 17.
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. If NO is selected the dry contact will operate when it is forced closed. If NC is selected, the dry contact will operate until it is forced open. Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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. Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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. Energy Save, or more commonly known as Smart Recovery, only works when the thermostat enters the Morning mode from the Night mode.
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 19 Page 19.
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. Setting this counter to zero in step #45 will prevent the Service Filter icon from ever appearing. MODE PROGRAM MODE Press the MODE button.
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. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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. MODE PROGRAM MODE Press the MODE button. While holding the MODE, press the PROGRAM button to enter Setup screens.
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). PROGRAM SET CLOCK VACATION Press the SET CLOCK button. While holding the SET CLOCK button, press the PROGRAM button to enter the Vacation programming setup steps.
Programming Vacation Mode (continued) VACATION DISPLAY - When the thermostat is placed into the Vacation mode, the thermostat will display the screen shown below. 2 y 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). Press the PROGRAM and SET CLOCK buttons to return to normal operation. 20 Page 20.
SECTION 21 Configuring the MISC Outputs Section 21 Contents: Configuring the Jumpers........21.2 Explanation of Jumper Settings..................................21.3 21 Page 21.
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.
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). It is adjustable from 0-60 minutes and the default And is two minutes.
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.
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). It is adjustable from 0-60 minutes and the default is two minutes.
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 22 Page 22.
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. Any information entered prior to this reset may be permanently lost. I2:00 Su MODE MODE FAN Place the thermostat in the OFF mode. Press and hold the MODE button.
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 Su MODE MODE FAN Place the thermostat in the OFF mode. Press and hold the MODE button. While holding the MODE button, press and hold the FAN button for 5 seconds. All icons will appear on the display.
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. RJ11 Type Jack IR RECEIVER / REMOTE CONTROL (optional accessory) - When the IR Receiver is connected, the thermostat can be controlled using an IR Remote Control.
SECTION 24 Advanced Setup Table Step# Description 1 Programmable Thermostat 2 Auto Changeover Thermostat 3 Programmable Fan 4 Programmable Fan Start Time 5 Programmable Fan Stop Time 6 Fan Off Delay 7 Thermoglow Backlight 8 F or C 9 Humidify with Fan 10 Cool to Dehumidify 11 Maximum Dehum Overshoot 12 Reheat Operation 13 DEHUM Terminal Polarity 14 Energy Watch Heat Timer 15 Energy Watch Cool Timer 16 Reset Service Humidify Icon 16 Reset UV Light Icon 18 Heatpump Jumper Setting 19 Reversing Valve Jumper S
SECTION 25 A Accessory Port, 23.1 Alerts see Run-Time Auto adjust temperature, 2.4, 4.8 changeover, 1.3, 4.3 14.2, 24.1 differential, see Differential fan, 7.2 icon, 1.3 lockout, 4.3 mode, 2.3 Aux icon, 15.7 AuxHeat icon, 1.5 Average thermostat sensor, 16.4 B b reversing valve, 12.2 Balance Point, 13.113.2, 24.1 Buttons down, 2.2, 2.4, 1.2, 8.3, 22.3 Index 11.2-11.5, 12.4, 22.2 fan, 1.2, 2.4, 7.2, front panel, 1.2 humidity, 1.2, 5.3, 9.3, 10.3 mode, 1.2, 2.3, 4.2, 8.3, 22.2 outdoor, 1.2, 5.2 program, 1.
SECTION 25 D Day icon, 1.4 programming, 6.3 setting, 2.2, 3.2 Deadband balance point, 13.1 1st stage, 14.4-14.5, 24.1 2nd stage, 14.4-14.5, 21.3, 21.5, 24.1 3rd stage, 14.4-14.5, 21.3, 24.1 Dehumidify Aux icon, 1.5 cool to, 10.4, 24.1 DEHUM jumper, 10.6 icon, 1.5 setpoint, 10.3 Delay fan-off, see Fan time between stages, see Time Delay Differential dehumidify, 10.2, heat and cool, 14.2,24.1 humidify, 9.
SECTION 25 Green Indicator, 1.2 H Heat 1st stage deadband, see Deadband emergency heat, 12.4 minutes of runtime, 14.4, 14.6 24.1 2nd stage deadband, see Deadband emergency heat, 12.4 electric strip heat, 2.4 minutes of runtime, 14.4, 14.6 24.1 3rd stage deadband, see Deadband W3, 21.3 AuxHeat icon, 1.5 deadband, see Deadband droop, see Deadband electric/heat pump, 12.2-12.3 Index icon, 1.3 indicator, 1.2 mode, 2.3 program, see Program run-time, see RunTime setpoint, 2.3-2.4, 6.2-6.
SECTION 25 see Keypad Lockout Lo icon, 1.5, 5.2 temperature, 5.2 M Manual changeover, 4.4, 4.6 cool, 4.3 heat, 4.3 Maximum Outdoor Temperature, see Hi Minimum Outdoor Temperature, see Lo MISC jumper, see Jumpers output, 21.2-21.5 Mode, 1.3, 2.3 Multi-stage Operation, 14.4 N Non-Programmable Thermostat, 4.2, 4.4-4.5 Normally Open/Closed, dry contact, 17.2 Index programmable output, 15.4 dehum terminal, 10.6 O O Reversing Valve see Reversing Valve Off Mode, 1.3, 2.3 Outdoor button, see Buttons icon, 1.
SECTION 25 degree icon blink, 16.2-16.4 outdoor temperature, see Outdoor read to, 16.3 viewing, 5.2, 22.3 Reset thermostat settings, see Factory Defaults run-time fan/filter, 19.2, 24.1 humidify, 19.4, UV light, 19.3, 24.1 Reversing Valve, 12.2, 13.3 RS1, see Remote Sensor RS2, see Outdoor Sensor Run-Time resetting, see Reset setting, humidifier, 19.4, 24.1 service filter, 19.2 24.1 UV light, 19.3, 24.1 viewing, cool, 11.3, 24.1 heat, 11.2, 24.1 humidification, 11.4 24.1 Index UV light, 11.5, 24.
SECTION 25 Index resetting, see Reset run-time, see RunTime setting, see Run-Time V Vacation, button, see Buttons mode, 20.1-20.2 programming, 20.120.2 setpoints, 20.1 W W3, see Jumpers Warranty, 26.1 Web, 15.7 Y Y2, see Jumpers Page 25.
SECTION 26 Warranty One-Year Warranty - This Product is warranted to be free from defects in material and workmanship.
Programming Worksheet see Section 6 DAY PERIOD START TIME COOL HEAT Morning M O N D A Y T U E S D A Y W E D N E S D A Y T H U R S D A Y F R I D A Y S A T U R D A Y S U N D A Y Day Evening Night Morning Copy Mon Tue Day No Evening Yes Night Morning Copy Tue Wed Day No Evening Yes Night Morning Copy Wed Thu Day No Evening Yes Night Morning Copy Thu Fri Day No Evening Yes Night Morning Copy Fri Sat Day No Evening Yes Night Morning Copy Sat Sun Day No Evening Yes N
