Venstar EXPLORER RESIDENTIAL T3950-IAQ Page 52 Owner'S Manual And Installation Instructions Download

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P/N 88-1015 Rev. 4i 11/24/20

Patent Pending

Summary of Contents for EXPLORER RESIDENTIAL T3950-IAQ

Page 1: ... HEAT COOL HEAT PUMP DIGITAL THERMOSTAT Owner s Manual and Installation Instructions Up to 4 Heat 2 Cool Stages With Air Patrol Humidity Control Dual Fuel Capable RESIDENTIAL T3950 IAQ ...

Page 2: ...d u s e d i n a c c o r d a n c e w i t h t h e i n s t r u c t i o n s ma y c a u s e h a r mf u l i n t e r f e r e n c e t o r a d i o c o mmu n i c a t i o n s a c c o r d a n c e w i t h t h e i n s t r u c t i o n s ma y c a u s e h a r mf u l i n t e r f e r e n c e t o r a d i o c o mmu n i c a t i o n s H o w e v e r t h e r e i s n o g u a r a n t e e t h a t i n t e r f e r e n c e w i ...

Page 3: ...i o n o f t h e d e v i c e L L é me t t e u r r é c e p t e u r e x e mp t d e l i c e n c e c o n t e n u d a n s l e p r é s e n t a p p a r e i l e s t c o n f o r me a u x C N Rd I n n o v a t i o n S c i e n c e s e t D é v e l o p p e me n t é c o n o mi q u e C a n a d a a p p l i c a b l e s a u x a p p a r e i l s r a d i o e x e mp t s d e l i c e n c e L e x p l o i t a t i o n e s t a...

Page 4: ...rol air quality range fan runtime Show Clock Clear all messages SETUP STEPS INSTALLER SETTINGS Equipment Timers and Heat Cool spread Set number of heating and cooling stages Deadbands and interstage timers Using a wired remote sensor Which sensor to use for temperature control Dry Contact Input Humidify Dehumidify Outputs Automated Demand Response Humidity settings Lockout heatpump or electric hea...

Page 5: ...1 Backlit Scrolling Display Backlit Cooler Warmer Buttons Backlit LCD Display Mode Button Heat or Cool Demand Indicator Red Heat Green Cool Setup Buttons Behind Door SENSOR Get To Know Your Thermostat ...

Page 6: ...2 Setup Buttons SENSOR Get To Know Your Thermostat ...

Page 7: ...Outdoor icon Indicates the temperature displayed is from the optional outdoor sensor 4 RoomTemperature Display Indicates the current room temperature and displays the outdoor temperature when selected 5 Mode Indicators Selects the operational mode of the equipment HEAT Indicates the heating mode COOL Indicates the air conditioning mode HEAT COOL Indicates the system will automatically change over ...

Page 8: ...ed room temperature s Also displays the highest and lowest temperatures for the day 11 Wi Fi icons One dot will always be present and the full wifi icon will appear when connected to the local access point The dot will blink when the thermostat is reaching the skyport server 12 icon Press MODE WARMER and COOLER buttons together to toggle the keylock HI Lo Program ONOFF Outdoor Fan On COOL AUXHEAT ...

Page 9: ...d stage electric strip heat is being used when the thermostat is programmed for Heat Pump operation Only the Aux icon will appear during Cool to Dehumidify to indicate Reheat operation 15 Hi and Lo icons Indicates the highest lowest daily values for outdoor temp wired wireless remote temp indoor humidity The high low values reset at midnight HI Lo Program ONOFF Outdoor Fan On COOL AUXHEAT Day Nigh...

Page 10: ...g your desired temperature HEAT OR COOL MODE Pressing the WARMER or COOLER buttons in Heat or Cool mode will adjust only the heat or cool setpoints individually displayed AUTO CHANGEOVER MODE Pressing the WARMER or COOLER buttons in Auto mode will adjust both the heat and cool setpoints simultaneously To adjust heat and cool setpoints individually choose HEAT mode to adjust the heat setpoint and C...

Page 11: ...in max Descriptions of the IAQ readings are discussed further in the Air Patrol section on page xx Any values that are invalid or unavailable with appear as dashes Viewing only connected wifi or VenNet sensor Values You may also view connected wifi and VenNet sensor values after pressing ACCESSORY STATUS followed by COOLER button Use MODE button to cycle between readings Note that battery strength...

Page 12: ...8 Air Patrol ...

Page 13: ... schedule Press the WARMER or COOLER buttons to make changes Press the MODE button to advance to the next step OFF RUN HOLD TO SET OFF RUN HOLD TO SET 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 Pr...

Page 14: ...lable modes in advanced Installer setup step 2 Press MODE to advance to the next step Select Morning StartTime Press the WARMER or COOLER buttons to adjust the time of day desired Press MODE to advance to the next step Select Morning Cool Setpoint Press the WARMER or COOLER buttons to adjust the cool setpoint desired This step will appear if Cool or Auto Mode was selected in the step where the Mor...

Page 15: ... one has been manually selected Auto Changeover is not available when this is selected Heat Only Allows the thermostat to only turn on HEAT or OFF modes Cool Only Allows the thermostat to only turn on COOL or OFF modes Setup Steps WARMER COOLER MODE Setup 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 a...

Page 16: ...ws for automatic dimming of the display at night 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 COOLER MODE SETUP Night Dimmer Brightness Setup Step 6 Off through seven levels o...

Page 17: ...Heating mode Cooling mode and in stand alone Fan operation Press FAN to reset Current Service Filter Calendar Days Setup Step 10 This counter displays the total number of calendar days that have elapsed since the counter was reset to help the user track Fan runtime Press FAN to reset Press the SETUP button then press MODE repeatedly until the desired setup step appears Use the WARMER or COOLER but...

Page 18: ...CATION and AWAY use these same settings VACATION button use specifies a duration of days for these settings whereas Away maintains these settings until the HOME AWAY button is pressed again When the VACATION button is pressed and the thermostat detects that a Wi Fi module is installed During Non Vacation Periods the scrolling display will read Use Skyport to View Edit Settings During Vacation Peri...

Page 19: ...rs the system has run in Auxiliary Heating This setup step is only available when the thermostat jumpers are configured for Heat Pump and Electric Heat Press FAN to reset Current Cool Runtime Hours Setup Step 13 This counter displays the number of hours the system has run in Cooling Press FAN to reset Current UV Lamp Calendar Days Setup Step 14 This counter displays the total number of calendar da...

Page 20: ...OFF is displayed to disable this feature UV Lamp Runtime Setup Step 18 Set UV Lamp Calendar Days Setup Step 18 This timer allows the user to specify the number of calendar days the UV Lamp will operate before the Replace UV Lamp alert will be displayed Press COOLER continuously until OFF appears to disable this alert Humidifier Runtime Setup Step 19 Set Humidifier Calendar Days Setup Step 19 This ...

Page 21: ...epeatedly 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 COOLER MODE SETUP To view set or reset System Runtimes press the SETUP button then press MODE Press MODE to advance to the desired setup step Use the WARMER or COOLER but...

Page 22: ...t pump applications Number of Cool Stages Setup Step 28 This setting assures proper stage callouts on the thermostat display for non heat pump applications Number of Compressor Stages Setup Step 29 This feature is for heat pump application only This feature allows the thermostat to control 1 or 2 compressor stages when configured for heat pump NOTE When step 60 Dual Fuel is set to ON this step wil...

Page 23: ... Specifies the additional minimum temperature difference after the third stage turns on before the final stage of strip heat is activated 0 10 Minutes Between 1st and 2nd Stage Setup Step 35 Specifies the minimum time in minutes after the first stage turns on before the second stage can turn on 0 60 Minutes Between 2nd and 3rd Stage Setup Step 36 Specifies the minimum time in minutes after the sec...

Page 24: ...he 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 COOLER MODE SETUP Programmable Fan Setup Steps 41 44 Fan Program Setup Step 41 This feature allows the fan to be programmed to turn on automatically for a specified amount of time during the day If this feature is set to O...

Page 25: ...Thermostat Averages the temperatures of the remote sensor s and the thermostat NOTE If a remote sensor is being used the degree icon on the large room temperature display will blink Wireless Remote to Use Setup Step 47 Specifies the use of the connected wired sensor The choices are Remote or Supply The remote option allows control to the sensor the supply does not Setup Steps Press the SETUP butto...

Page 26: ... this step is set to AUTO the Humidity setpoint will revert automatically to a setting of 15 percent Cool To Dehumidify Setup Step 52 Specifies if the cooling equipment is allowed to turn on exclusively to lower room humidity If set to OFF the following two steps will not appear Max Dehum Overcool Setup Step 53 Specifies how many degrees below the Cool setpoint the air conditioning will run to sat...

Page 27: ...ut above a specific outdoor temperature These steps will only appear if the thermostat jumper J1 is set for Heat Pump and J3 is set for Electric Heat A local outdoor sensor must be used for this feature to work Lockout Aux Heat With Outdoor Temp Setup Step 57 When set to ON the Aux Heat Lockout feature is enabled When set to OFF Auxiliary Heat will stage normally Aux Heat Lockout Temp Setup Step 5...

Page 28: ...e Point setup step 61 0 60 Specifies the outdoor temperature at which the heat pump will cease operating and a fossil fuel source of heat is used Dual Fuel Changeover Delay setup step 62 0 90 Specifies the number of seconds the heat pump is allowed to continue running after a fossil fuel heat source has been engaged Fan Off Delay in Seconds Setup Step 63 This feature allows the user to increase th...

Page 29: ...Recovery is active Dry Contact Operation Setup Steps 66 67 Dry Contact Polarity setup Step 66 Open Normally Open The dry contact is open until the connected device closes the circuit Condensate Dry Contact Use Setup Step 67 If selected when the dry contact is active the thermostat will lockout the compressor terminal s and CONDENSATE PAN OVERFLOW will appear on the display VACATION If VACATION is ...

Page 30: ...eans voltage is sent to the DEHUM output when there is no demand to dehumidify Dehumidify Only With Cooling Setup Step 70 When set to ON Dehumidify will only turn on with a 1st stage cooling demand When set to OFF Dehumidify will turn on at any time that the room humidity exceeds the dehumidification setpoint Press the SETUP button then press MODE repeatedly until the desired setup step appears Us...

Page 31: ...at and cool setpoints to the values specified in setup steps 89 and 90 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 COOLER MODE SETUP Setup Steps DISPLAY INDICATIONS WHEN AN A...

Page 32: ...ht be paying more for energy while an event is active you can impose tighter limits on setpoint ranges that are only enforced during the event Static Cool Setpoint Setup Step 75 Static Heat Setpoint Setup Step 76 Specifies the setpoints that will come into use during an event when the PRICE DEPENDENT ACTION is set to OBSERVE STATIC SETPOINTS Cool Setpoint Offset Setup Step 77 Heat Setpoint Offset ...

Page 33: ...MER 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 COOLER MODE SETUP IAQ Air Patrol Setup Step 79 Air Patrol on if IAQ exceeds Poor Quality Setup Step 80 Air Patrol Fan on Minutes Setup Step 81 ...

Page 34: ...ware to interface with your thermostat Typically used with home automation set ups Wi Fi accessory is required Show Clock Setup Step 84 Select ON or OFF to have the time of day appear on the screen Press Fan To Clear All Messages Setup Step 85 This feature allows the user to clear all current error messages from the display Press the SETUP button then press MODE repeatedly until the desired setup ...

Page 35: ... outlined above for keypad lockout To unlock the keypad press and hold the MODE button While holding the MODE button press the WARMER and COOLER buttons together The icon will disappear from the display then release the buttons WARMER COOLER MODE 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 select...

Page 36: ...1 Press and hold SETUP for 10 seconds All icons will appear on the display Keep pressing the SETUP button until you see this screen 2 After all the icons appear release SETUP Press and hold FAN for 5 seconds DEFAULTS will appear on the display Keep pressing the FAN button until you see this screen 3 After DEFAULTS appears release FAN Press MODE to return to normal operation FAN ON AUTO MODE SETUP ...

Page 37: ...ss WARMER to turn on and cycle up through the heating stages Press COOLER to turn the heating stages off Press MODE to exit Press COOLER to turn on and cycle down through the cooling stages Press WARMER to turn the cooling stages off Press MODE to exit 4 Press MODE until CALIBRATE SENSORS appears on the scrolling display Press WARMER forYes or COOLER for No Press MODE to select which sensor to cal...

Page 38: ... Heating Air Conditioning system at the main fuse panel Most residential systems have a separate breaker for disconnecting power to the furnace Remove the cover of the old thermostat If it does not come off easily check for screws Loosen the screws holding the thermostat base or subbase to the wall and lift away If you have a smart phone handy take a photo of the wiring for future reference Discon...

Page 39: ...e Install on the old thermostat Function new thermostat terminal marked 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 Valve W1 O B W2 2nd Stage Heat W2 Y2 2nd Stage Cooling Y2 W3 3rd Stage Heat W3 H Hum Humidity HUM D Dehum Dehumidity DEHUM Ck1 Dry Contact Switch DRY CONTACT CKGND Dry Contact Switch DRY CONTACT O B is used if your system i...

Page 40: ...control circuit C 24 VAC common AUX Aux output OUTDOOR Outdoor sensor SENSOR connections REMOTE Remote sensor SENSOR connections DRY Dry Contact CONTACT connections IMPORTANT This thermostat requires both R 24 VAC Return and C 24 VAC Common be connected to the backplate terminals To remove the thermostat backplate Gently separate the display from the base by pulling ﬁrst from one side then the oth...

Page 41: ...en GAS is chosen the auxiliary heat will not be allowed to run during heat pump operation When using a Dual Fuel system set this switch for GAS T3950 IAQ When ELEC is chosen up to two stages of auxiliary strip heat will be allowed to run For Heat Pump Only When the GAS EL or HP dip switch is configured for HP this dip switch O or B must be set to control the appropriate reversing valve If O is cho...

Page 42: ...Cooling with 1 stage Electric Heat 5 Wire 1 Stage Cooling 1 Stage Heat 24VAC Power 24VAC Common 1st Stage Heat 1st Stage Cool Fan Residential Commercial 2 Stage Cooling with 3 stage Gas Heat 8 Wire 2 Stage Cooling 3 Stage Heat 24VAC Power 24VAC Common 1st Stage Heat 2nd Stage Heat 3rd Stage Heat 1st Stage Cool 2nd Stage Cool Fan R C W1 O B Y1 G R C W1 O B Y1 G R C W1 O B W2 W3 Y1 Y2 G R C W1 O B 2...

Page 43: ...al Commercial Heat Pump with O Reversing Valve 6 Wire 1 Stage Cooling 2 Stage Heat R 24VAC Power C 24VAC Common W1 O B Reversing Valve Y1 1st Stage Compressor Cool or Heat W2 Aux Heat G Fan Residential Commercial Heat Pump with O Reversing Valve 7 Wire 2 Stage Cooling 3 Stage Heat R 24VAC Power C 24VAC Common W1 O B Reversing Valve W2 3rd Stage Heat Y1 1st Stage Compressor Cool or Heat Y2 2nd Stag...

Page 44: ... C W1 W2 W3 Y1 Y2 G Setu Nu Resi O Re 6 Wir R C W1 Y1 W2 G Residential Commercial Heat Pump with O Reversing Valve 7 Wire 2 Stage Cooling 3 Stage Heat R 24VAC Power C 24VAC Common W1 O B Reversing Valve W2 3rd Stage Heat Y1 1st Stage Compressor Cool or Heat Y2 2nd Stage Compressor Cool or Heat G Fan Setup Step 24 is set to 2 Number of Compressor Stages 1 GAS O GAS EL ELEC B HP ON 2 3 1 GAS O GAS E...

Page 45: ... COOLER buttons to adjust the value of your selection To leave Technician Setup press SETUP Technician Setup is for diagnostic and testing purposes and is intended for use by a qualified technician See page 15 for more detailed instructions Technician Setup contains the following options View the version number of the thermostat View the jumper setting of J1 Gas Electric or Heat Pump J2 Reversing ...

Page 46: ...to deadband Humidify To increase the amount of moisture in the air Icon The word or symbol that appears on the thermostat display Mode The current operating condition of the thermostat i e Off Heat Cool Auto Program On Non ProgrammableThermostat A thermostat that does not have the capability of runningTime Period Programming Programmable Fan Feature that turns on the fan for certain time each hour...

Page 47: ...etpoint Limits page 22 SYMPTOM The heating does not attempt to turn on CAUSE The heating setpoint is set too low REMEDY Raise the heating setpoint or raise the heating set point limit See Setpoint Limits page 22 SYMPTOM When controlling a residential heat pump and asking for cooling the heat comes on CAUSE The thermostat reversing valve jumper is set for B REMEDY Set the reversing valve jumper for...

Page 48: ...ilter Runtime Hours 21 0 1950 hours 0 17 Set Service Filter Calendar Days 21 0 720 Days 0 18 Set UV Lamp Calendar Days 22 0 720 Days 0 19 Set Humidifier Calendar Days 22 0 720 Days 0 20 Language 17 English Espanol Francais English 21 Setpoint Limits 26 No Use No 22 Max Heat Setpoint 26 35 99 Degrees 74 23 Min Cool Setpoint 26 35 99 Degrees 70 24 Cycles Per Hour 26 No Limit 2 3 4 5 6 6 25 Compresso...

Page 49: ...Fan With Humidity Demand Fan On Fan Off Fan Off 50 Fan With Dehumidify Demand Fan On Fan Off Fan Off 51 Humidity Setpoints Auto Manual Manual 52 Cool To Dehumidify On Off Off 53 Maximum Dehum Overcool 0 20 Degrees 2 54 Reheat Operation W Cool To Dehum On Off Off 55 Lockout Heatpump with Outdoor Temp On Off Off 56 Lockout Temp 20 75 Degrees 35 57 Lockout Aux Heat with Outdoor Temp On Off Off 58 Aux...

Page 50: ... 90 90 74 Event Min Heat Setpoint 50 85 50 75 Static Cool Setpoint 65 85 82 76 Static Heat Setpoint 65 85 60 77 Cool Setpoint Offset 1 to 10 4 78 Heat Setpoint Offset 1 to 10 4 79 IAQ AIR PATROL enabled disabled disabled 80 AIRPATROL ON IF IAQ EXCEEDS POOR GOOD QUALITY 81 AIR PATROL FAN ON MINUTES 10 55 10 82 Skyport On Off On 83 Local API On Off Off 84 Show Clock On Off On 85 Press Fan To Clear A...

Page 51: ... WHATSOEVER ALL WORK UNDERTHETERMS OFTHIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS ALL REPLACEMENT PARTS WHETHER NEW OR REMANUFACTURED ASSUME ASTHEIR WARRANTY PERIOD ONLYTHE REMAININGTIME PERIOD OFTHIS WARRANTY THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR 1 Normal maintenance as outlined in the installation and servicing instructions or owner s manual including filter cleaning and o...

Page 52: ...P N 88 1015 Rev 4i 11 24 20 Patent Pending ...

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Venstar EXPLORER RESIDENTIAL T3950-IAQ, Owner'S Manual And Installation Instructions

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