Venstar T4950SCH-IAQ, Owner'S Manual And Installation Instructions

Page 1: ...GITAL THERMOSTAT IAQ Owner s Manual and Installation Instructions Up to 4 Heat 2 Cool Stages With Air Patrol Humidity Control Light Activation COMMERCIAL T4950SCH IAQ Designed for the School Environme...

Page 2: ...void the user s authority to operate the equipment This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are...

Page 3: ...y interference including interference that may cause undesired operation of the device L metteur r cepteur exempt de licence contenu dans le pr sent appareil est conforme aux CNR d Innovation Sciences...

Page 4: ...dule ON OFF 10 Programming a Schedule 10 AIR PATROL 12 VENNET SENSORS 15 Pairing a sensor 15 Un pairing a sensor 16 Factory Defaulting a sensor 16 SETUP STEPS Available Modes heat only cool only heat...

Page 5: ...ff 32 Local API on off 32 Show Clock show IAQ 32 Show IAQ 32 Clear all messages 32 LOCKING UNLOCKING THE BUTTONS 33 HOLIDAY 34 EMERGENCY HEAT 35 CALIBRATION 36 RESTORING FACTORY DEFAULT SETTINGS 37 TE...

Page 6: ...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 Non ProgrammableThermost...

Page 7: ...Backlit Scrolling Display Backlit Cooler Warmer Buttons Backlit LCD Display Override Start Button Heat or Cool Demand Indicator Red Heat Green Cool Setup Buttons Behind Door Get To Know Your Thermosta...

Page 8: ...3 Setup Buttons Get To Know Your Thermostat...

Page 9: ...Temperature Display Indicates the current room temperature and displays the outdoor temperature when selected 4 Mode Indicators Selects the operational mode of the equipment HEAT Indicates the heating...

Page 10: ...room temperature s Also displays the highest and lowest temperatures for the day 10 Wi Fi icons One dot will always be present and the full wifi icon will appear when connected to the local access poi...

Page 11: ...Indicates the lowest recorded outdoor temperature for the day 14 Hi icon Indicates the highest recorded outdoor temperature for the day 15 Fan On icon Indicates constant continuous fan operation When...

Page 12: ...s 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 set...

Page 13: ...in the Air Patrol section on page 12 Any values that are invalid or unavailable with appear as dashes IAQ index Calculated relative humidity Wired remote temp Highest reading since midnight Lowest rea...

Page 14: ...el the override timer returning the thermostat to unoccupied settings Within the Start Stop times for the day the thermostat should enter occupied and bring in occupied setpoints for the rest of the d...

Page 15: ...rver 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 butto...

Page 16: ...ied Cool Setpoint Adjust the Weekday Occupied Heat Setpoint Set the Unoccupied Mode Press the Warmer or Cooler buttons to choose the mode for the Unoccupied period The thermostat is in Unoccupied when...

Page 17: ...til The Indoor Air Quality improves OR The fan runtime reaches its selected maximum runtime per hour the Air Patrol Duration Additionally the thermostat s AUX output can be asserted to control 3rd par...

Page 18: ...he bottom of the drop down menu 3 Select Indoor Air Quality in the shaded area of Settings Setup Configuration Air Patrol is configured from Skyweb Venstar s Skyport web application Select an Explorer...

Page 19: ...output 6 Set the Air Patrol Duration This is the maximum the fan is allowed to run per hour If the Air Quality does not reach the next better IAQ level in this allotted time it will stop the fan and...

Page 20: ...age from the display and stop the pairing procedure on the thermostat 4 Once pairing is completed you must select the type of sensor Remote or Outdoor a At this point the thermostat will display REMOT...

Page 21: ...dvisable to name the sensor before pairing additional sensors Returning a Sensor to Factory Default settings If you are pairing the sensor to a new thermostat you will need to remove the previously pa...

Page 22: ...ly 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...

Page 23: ...OOLER MODE SETUP Night Dimmer Brightness Setup Step 5 Off through seven levels of brightness Night Dimmer Start Time Setup Step 6 12 00 am to 12 00 am Night Dimmer Stop Time Setup Step 7 12 00 am to 1...

Page 24: ...rent Override Hours Setup Step 13 This counter keeps track of the number of hours that the thermostat is overridden into Occupied settings Press FAN to reset Current UV Lamp Calendar Days Setup Step 1...

Page 25: ...FF 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...

Page 26: ...t is locked into the current mode and time period program setting and the FAN button is locked out Setpoints Frozen 3 When this level is selected the heat and cool setpoints the current mode the FAN b...

Page 27: ...louts on the thermostat display for non heat pump applications Number of Cool Stages Setup Step 28 This setting assures proper stage callouts on the thermostat display for non heat pump applications N...

Page 28: ...p only 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 Spe...

Page 29: ...rn off at third stage deadband or remain on until the room temperature demand is satisfied Choose between Deadband or Setpoint Minutes of Fan Purge setup step 41 When this feature is activated the fan...

Page 30: ...Wired Remote averages internal and attached wired remote sensor Average all Sensors averages internal any attached wired or paired wireless sensors These options only appear if step 42 Wired Sensor Ty...

Page 31: ...elow the Cool setpoint the air conditioning will run to satisfy a Cool to Dehumidify demand 0 20 Reheat Operation With Cool To Dehumidify Setup Step 51 Specifies if electric strip heat is allowed to t...

Page 32: ...ll be active when schedule is in occupied or fan purge is active Max Override Hours Setup Step 56 Specifies how long the thermostat will allow occupied setpoints outside of classroom hours 0 6 hours W...

Page 33: ...f OCCUPIED is selected when the dry contact is active the thermostat will be forced into the programmed occupied mode setpoints and the occupied icon will blink This setting is useful for allowing a t...

Page 34: ...o leave the setup screens WARMER COOLER MODE SETUP Setup Steps Light Activation Sensitivity Setup Step 64 With the lights on in the space press the FAN button to set the sensitivity of the light senso...

Page 35: ...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...

Page 36: ...eived from the utility Since you might 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...

Page 37: ...the indoor blower will run for the length of time specified in this step 5 to 60 minutes This step only appears if step 74 is set to enabled Note The auxiliary output can be programmed to turn on when...

Page 38: ...ER and COOLER buttons together for 5 seconds The icon will appear on the display then release the buttons Press all three buttons in the order outlined above for button lockout To unlock the buttons p...

Page 39: ...iday setup programming at the local thermostat is not allowed In this case Holiday setup and programming is accomplished with the Skyport Web App Skyport gives the user extensive control over Holiday...

Page 40: ...rgency Heat feature Press the EMERGENCY HEAT button During Emergency Heat operation the thermostat will turn on the fan and auxiliary stages of heat when there is a demand for heat The compressor will...

Page 41: ...ENSORS UP YES MODE NEXT appears on the display 3 Press UP WARMER to move to thermostat screen then adjust the indicated room temperature readings as desired then MODE to store and move to next screen...

Page 42: ...and or reset to factory settings Press hold FAN for 2 seconds to bring defaults into your selection After successfully defaulted the screen will return to all icons Press SETUP to return to normal the...

Page 43: ...ling display will read NOTHING ON Next Press 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...

Page 44: ...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 com...

Page 45: ...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 Stag...

Page 46: ...er 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 requir...

Page 47: ...ELEC defines the Aux Heat type When GAS is chosen the auxiliary heat will not be allowed to run during heat pump operation When ELEC is chosen up to two stages of auxiliary strip heat will be allowed...

Page 48: ...ooling 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 S...

Page 49: ...0 are set to 2 Residential 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 A...

Page 50: ...SENSOR DRY CONTACT OUTDOOR SENSOR Humidification System DEHUM HUM Dehumidification Terminal on Equipment Dry Contact and Aux Output G Y1 Y2 W3 R W1 O B W2 HUM DEHUM C AUX REMOTE SENSOR DRY CONTACT OUT...

Page 51: ...old for 10 seconds All icons appear Press MODE to advance through the setup steps Press WARMER or COOLER to adjust the selection WARMER COOLER MODE SETUP HI Lo Program ONOFF Outdoor Fan On COOL AUXHEA...

Page 52: ...is set too high REMEDY Lower the cooling setpoint or lower the cooling set point limit See Setpoint Limits page 21 SYMPTOM The heating does not attempt to turn on CAUSE The heating setpoint is set too...

Page 53: ...vice Filter Runtime Hours 20 0 1950 hours 0 17 Set Service Filter Calendar Days 20 0 720 Days 0 18 Set UV Lamp Calendar Days 20 0 720 Days 0 19 Set Humidifier Calendar Days 20 0 720 Days 0 20 Language...

Page 54: ...ees 2 50 Maximum Unocc Dehum Overcool 26 0 20 Degrees 2 51 Reheat Operation W Cool To Dehum 26 On Off Off 52 Fan Off Delay 26 0 120 Seconds 0 53 F C 27 Fahrenheit F Celsius C F 54 Aux Out Polarity 27...

Page 55: ...15 4 73 Heat Setpoint Offset 31 1 to 15 4 74 IAQ Air Patrol 32 enabled disabled disabled 75 Air Patrol On If IAQ Exceeds 32 Moderate Poor Moderate Moderate Quality 76 Air Patrol Fan On Minutes 32 5 6...

Page 56: ...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 REMAININGTIM...

Page 57: ...P N 88 1436 Rev 2 01 18 22 Patent Pending...