RESIDENTIAL T3950-IAQ DIGITAL THERMOSTAT Up to 4 Heat & 2 Cool Stages With Air Patrol, Humidity Control, & Dual Fuel Capable Owner’s Manual and Installation Instructions HEAT COOL &HEAT PUMP
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Table of Contents GET TO KNOW YOUR THERMOSTAT............................................................................. HOW TO USE YOUR THERMOSTAT............................................................................... AIR PATROL...................................................................................................................... SETUP STEPS - USER SETTINGS Program Mode (non-programmable or 7 day programmable).....................................
Get To Know Your Thermostat Backlit, Scrolling Display Backlit Cooler & Warmer Buttons Backlit LCD Display Mode Button Heat or Cool Demand Indicator Red = Heat, Green = Cool SENSOR Setup Buttons Behind Door 1
Get To Know Your Thermostat SENSOR Setup Buttons 2
Get To Know Your Thermostat Display Features 2 1 Pm 18:88Am 6 2nd3rd Program ONOFF Stage 188 Setup Step 188 C L OO HI Day Night Morning Evening 3 Fan On Outdoor 188 5 AUXHEAT 88 5 Lo 4 1 Program icon—Indicates that Time Period Programming is running or is enabled to be set. 2 Clock with Day of the Week—Indicates the current time and day. This clock is also used to program the time period schedules. 3 Outdoor icon—Indicates the temperature displayed is from the optional outdoor sensor.
Get To Know Your Thermostat Display Features 7 Pm 18:88Am 8 9 2nd3rd Program ONOFF Stage 188 Setup Step 188 C L OO HI Day Night Morning Evening Fan On Outdoor 188 AUXHEAT 88 Lo 10 12 11 10 7 2nd and 3rd Stage icons Indicates what stage of cooling or heating is currently energized. 8 Setup Step icon Indicates the step number when the thermostat 9 Morning, Day, Evening & Night icons Indicates the day part of the time period program. is in the setup mode.
Get To Know Your Thermostat Display Features Pm 18:88Am 2nd3rd Program ONOFF Stage 188 Setup Step 13 188 C L OO HI Day Night Morning Evening Fan On Outdoor 188 14 15 AUXHEAT 88 15 16 Lo 14 15 13 Fan On icon – Indicates constant, continuous fan operation. When Fan On is not lit - indicates the fan will only operate when necessary to heat or to cool.
How to use your thermostat During Setup and Programming Press the WARMER or COOLER buttons to modify the selection. Press the MODE button to advance and confirm through the setup steps. Selecting the Heat or Cool Mode Select mode by pressing the MODE button. HEAT - Only the heating operation will be controlled by the thermostat in this mode. COOL - Only the cooling operation will be controlled by the thermostat in this mode.
How to use your thermostat Viewing Air Quality and Temperature Values Press the SENSOR button to begin viewing the various sensors associated with this thermostat. Note that it may take up to 30 minutes for valid sensor values after the thermostat is first powered. Use the MODE button to cycle between sensors and SENSOR button to return to normal operation.
Air Patrol 8
Setup Steps Setting the Clock and Day Not available when connected to the Skyport server Press the SET CLOCK button. Adjust the clock using the WARMER or COOLER buttons. Press MODE to advance to the day setting. Adjust the day using the WARMER or COOLER buttons. Press the SET CLOCK button to confirm settings. TIP: To adjust the time by hours press and hold the FAN button while pressing the WARMER or COOLER buttons.
Setup Steps This thermostat features four programmable time periods per 24 hour day: Morning, Day, Evening, and Night. The start time for each time period is adjustable. The stop time for each time period is the start time for the next period. Each time period, or day part may be individually disabled. Select the Day to Program - Press the WARMER or COOLER to select the desired Day or Week Part in the case of 5-2 (weekday – weekend) programming.
Setup Steps How to Change Settings in the Setup Screens To enter Advanced Setup, press the SETUP button, then press MODE. Use the WARMER or COOLER buttons to adjust the value of your selection. Press MODE to advance to the next setup step. Press SETUP again to leave the setup screens. WARMER Setup MODE COOLER *Some of the following settings are usually adjusted by the installer. It is acceptable to have any of these steps be adjusted by the user as well.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Backlight (Setup Steps 3-8) Backlight (Setup Step 3) Off - Backlight turns on with any button press and turns off after 8 seconds. On - Backlight is on continuously.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Resetting Service Filter (Setup Steps 9, 10) These will show how long your fan has been running in hours and days. View both of these steps and press FAN while viewing to reset the counter to 0.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Vacation & Away Settings The Vacation feature allows the thermostat to use temporary, energy saving setpoints without having to change regular programming.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Emergency Heat The Emergency Heat function is only available if your thermostat is set to control a Heat Pump. EMERGCY To initiate the Emergency Heat feature, Press the EMERGCY button.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER These setup steps allow the user to monitor equipment runtimes and program service alerts. Service alerts are displayed in the scrolling marquee.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Setpoint Limits (Setup Step 21) When this feature is set to ON, the heat and cool setpoints can be restricted to preset levels, set in steps 23 and 24.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Cycles Per Hour* (Setup Step 24) The Cycles Per Hour setting may limit the number of times per hour your HVAC unit may energize.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Deadband Settings (Setup Steps 31 - 40)* The Deadband is the number of degrees or minutes that the thermostat waits before it initiates the stages of heating or cooling.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Second Stage on Until Deadband (Setup Step 38) - Specifies whether second stage will turn off at first stage deadband or remain on until the room temperature demand is satisfied.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Wired Sensor Type* (Setup Step 45) Specifies the use of the connected, wired sensor. The choices are: Remote, Supply, Outdoor. Only the remote option allows control of the sensor.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Humidity and Dehumidity (Setup Steps 48-54)* Humidity Only With Heat (Setup Step 48) When this step is set to ON, Humidity will not run without a demand for Heat.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Dual Fuel (Setup Steps 59 - 62)* This feature is for heat pump applications only. Steps 56 - 59 will only appear if the thermostat jumper is set J1 for Heat Pump and J3 is set for Gas Heat.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Smart Recovery (Setup Step 65) Smart Recovery turns on the heat or cool before the Morning start time to bring the room temperature to the Morning setpoint at the start of the Morning time period.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Humidity Output Polarity* (Setup Step 68) Open (Normally Open) means no voltage is sent to the HUM output when there is no demand for humidity.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER ADR* (Setup Step 71) Controls whether you want the thermostat to possibly respond to signals from the utility provider. Select ON to allow this and to have steps 86-92 appear.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens.
Setup Steps Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER Auxiliary Output The auxiliary output will become active whenever Air Patrol senses that the air quality has fallen to the level you specify in step #80.
Locking the Keypad Press the SETUP button, then press MODE repeatedly until the desired setup step appears. Use the WARMER or COOLER buttons to make selection. Press MODE to advance to the next step. Press/hold MODE to go backwards to prior steps. Press SETUP to leave the setup screens. WARMER SETUP MODE COOLER 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.
Restoring Factory Default Settings Restoring Factory Default Settings (for default values see page 44, Advanced Setup Steps Table) 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. 1 Press and hold SETUP for 10 seconds. All icons will appear on the display.
Installation Instructions Test Operation The thermostat has a diagnostic feature that enables testing of all outputs. This feature is contained in the thermostat’s technician setup. To enter Technician Setup, press and hold the SETUP button for 10 seconds until all the icons appear. Follow the next steps to view settings and test equipment. 1. Press MODE to view the pcb and firmware versions. The firmware version will be numbers like 04-XX-YY. 2.
Installation Instructions Remove and Replace the old thermostat To install the thermostat properly, please follow these step by step instructions. If you are unsure about any of these steps, call a qualified technician for assistance. • Assemble tools: Flat blade screwdriver, wire cutters, wire strippers and phone camera. • Make sure your Heater/Air Conditioner is working properly before beginning installation of the thermostat. • Carefully unpack the thermostat.
Installation Instructions Wire Connections If the terminal designations on your old thermostat do not match those on the new thermostat, refer to the chart below or the wiring diagrams that follow. Wire from the old thermostat Function terminal marked Install on the new thermostat connector marked G or F Fan G Y1, Y Cooling Y1 W1, W Heating W1/0/B Rh, R, M, Vr, A Power R C Common C O/B Rev.
Installation Instructions The Explorer Thermostat Backplate R G W1/O/B W2 Y1 Y2 W3 HUM DEHUM R G W1/O/B W2 Y1 Y2 W3 HUM DEHUM To remove the thermostat backplate: Gently separate the display from the base by pulling first from one side, then the other until the two pieces unsnap. A small screwdriver may be used, very carefully, to start seperating the two pieces.
Installation Instructions Check Dip Switch Ensure which switch is correct for your system. Dip switches are located on the back of the thermostat. GAS-EL O GAS HP B ELEC 1. When GAS/EL or HP is set for GAS/EL: This switch (GAS or ELEC) controls how the thermostat will control the Fan (G) terminal in heating mode. When GAS is chosen, the thermostat will not energize the Fan (G) terminal in heating. When ELEC is chosen the thermostat will energize the fan in heating. 2.
Installation Instructions Sample Wiring Diagrams Conventional Heating and Cooling Systems 3 Wire, Heat Only 4 Wire, Cool Only Residential & Commercial 1 Stage Heating with no Fan. R C W1/O/B R C Y1 G 24VAC Power 24VAC Common 1st Stage Heat Residential & Commercial 1 Stage Cooling, with 1 stage Electric Heat. 24VAC Power 24VAC Common 1st Stage Heat 1st Stage Cool Fan R C W1/O/B Y1 G 3 3 8 Wire, 2 Stage Cooling, 3 Stage Heat Residential & Commercial 2 Stage Cooling, with 3 stage Gas Heat.
Installation Instructions Sample Wiring Diagrams Heat Pump Systems 5 Wire, 1 Stage Cooling, 1 Stage Heat 6 Wire, 1 Stage Cooling, 2 Stage Heat Residential & Commercial Heat Pump with O Reversing Valve R C W1/O/B Y1 G R C W1/O/B Y1 W2 G ELEC B HP 8 Wire, 2 Stage Cooling, 4 Stage Heat Residential & Commercial Heat Pump with O Reversing Valve. Residential & Commercial Heat Pump with O Reversing Valve.
Installation Instructions Sample Wiring Diagrams 5 Wire, 1 Stage Cooling, 1 Stage Heat Residential & Commercial Heat Pump with O Reversing Valve Heat Pump Systems with Dual Fuel R C W1/O/B Y1 G ON 1 2 3 GAS O GAS/EL 24VAC Power 24VAC Common Reversing Valve 1st Stage Compressor (Cool or Heat) Fan ELEC B HP 7 Wire, 2 Stage Cooling, 3 Stage Heat Humidification or Dehumidification Residential & Commercial Heat Pump with O Reversing Valve.
Technician Setup To enter Technician Setup, press and hold the SETUP button for 10 seconds. After all the icons appear, press MODE. The version number of the thermostat will appear in the scrolling text. Press MODE to advance to the next step. Use the WARMER or COOLER buttons to adjust the value of your selection. To leave Technician Setup, press SETUP.
Glossary of Terms Air Patrol: Feature that turns on the fan when measured air quality is below what is desired. Auto-Changeover: A mode in which the thermostat will turn on the heating or cooling based on room temperature demand. Cool Setpoint: The warmest temperature that the space should rise to before cooling is turned on (without regard to deadband). Deadband: The number of degrees the thermostat will wait, once a setpoint has been reached, before energizing heating or cooling.
Troubleshooting • SYMPTOM: The air conditioning does not attempt to turn on. CAUSE: The compressor timer lockout may prevent the air conditioner from turning on for a period of time. REMEDY: Consult the Owner’s Manual in the Installer Setup section to defeat the Cycles Per Hour (page 29). • SYMPTOM: The display is blank. CAUSE: Lack of proper power. REMEDY: Make sure the power is on to the furnace and that you have 24vac between R & C. • SYMPTOM: The air conditioning does not attempt to turn on.
Advanced Setup Table Df = Factory Default Setting Step# Description Pg# Range 1 Prog Mode 25 2 Available Modes 25 3 Backlight 17 4 Backlight Level 17 5 Night Dimmer 17 6 Night Dimmer Brightness 17 7 Night Dimmer Start Time 17 8 Night Dimmer Stop Time 17 9 Current Service Filter Runtime Hours 21 10 Current Service Filter Calendar Days 21 11 Current Heat Runtime Hours 22 12 Current Aux Heat Runtime Hours 22 13 Current Cool Runtime Hours 22 14 Current UV Lamp Calendar Days 22 15 Current Humidifier Calend
Advanced Setup Table Df = Factory Default Setting Step# Description Pg# Range Df 40 4th Stage Turnoff Point Deadband, Setpoint 41 Fan Program On, Off 42 Minutes of Fan Runtime 0-60 43 Fan Program Start Time 12:00A - 12:00A 44 Fan Program Stop Time 12:00A - 12:00A 45 Wired Sensor Type Remote, Supply, Return 46 Control to Temp Source Thermostat, Wired Remote*, Wireless Remote, Average of Wireless Remotes, Average Thermostat and Wired Remote*, Average All Sensors.
Advanced Setup Table Df = Factory Default Setting Step# Description Pg# Range 71 ADR 72 ADR Action 73 Event Max Cool Setpoint 74 Event Min Heat Setpoint 75 Static Cool Setpoint 76 Static Heat Setpoint 77 Cool Setpoint Offset 78 Heat Setpoint Offset 79 IAQ AIR PATROL 80 AIRPATROL ON IF IAQ EXCEEDS POOR[GOOD] QUALITY” 81 AIR PATROL FAN ON MINUTES 82 Skyport 83 Local API 84 Show Clock 85 Press Fan To Clear All Messages 46 Df On, Off Observe Setpoint Offsets, Observe Stat
Warranty One-Year Warranty - This Product is warranted to be free from defects in material and workmanship.
Patent Pending P/N 88-1015 Rev.
