Venstar T0140, Owner'S Manual

Page 1: ...R S MANUAL Use with most 1 or 2 Stage Heat Pump Heat and 1 stage Heat Pump Cool units Stages 2 Heat 1 Cool Battery or System Powered Auxiliary Heat Indicator Fahrenheit or Celsius PROGRAMMABLE NON PROGRAMMABLE NON up to 1 cool up to 1 cool 2 heat 2 heat HEAT PUMP HEAT PUMP Bi Color LED when system powered ...

Page 2: ...age Remove Old Thermostat Safety Warnings Front Panel Display Normal Operation Preparation Battery Replacement Warranty Test Operation Troubleshooting Wire Connections Fahrenheit or Celsius Aux Heat OWNER S MANUAL T0140 ...

Page 3: ...isplay when it is time to replace the batteries If the thermostat is connected to 24v power the batteries should still be installed but are not required When Low Battery is displayed the batteries must be replaced immediately The manufacturer cannot be liable for improper operation of the thermostat if the batteries are not immediately replaced Annual battery replacement is especially critical in ...

Page 4: ...cy Normal Lockout AUX HEAT SWITCH OWNER S MANUAL T0140 BATTERY DOOR COOLER WARMER BUTTONS MODE SWITCH Cool Off or Heat On or Auto FAN SWITCH DISPLAY BI COLOR LED Heat or Cool demand indicator when system powered Red Heat Green Cool ...

Page 5: ... to switch from the current room temperature to the desired set temperature Current room or set temperature Indicates battery life is low it is recommended to replace the batteries at this time OWNER S MANUAL T0140 Heat and Cool indicators In normal operation Heat or Cool appears depending on the Mode Switch position When heat or cool is energized the Heat or Cool indicator will flash If the therm...

Page 6: ... fan switched to Auto In Fan Auto the fan will turn on only with a heat or cool demand When Fan On is selected the fan will run continuously Adjust the desired set temperature with the COOLER or WARMER buttons OWNER S MANUAL T0140 On or Auto FAN SWITCH COOLER WARMER BUTTONS MODE SWITCH Cool Off or Heat ...

Page 7: ...nd Lockout Aux Heat will never turn on regardless of the heat demand When the Aux Heat switch is in the Emergency position the compressor will also be locked out during cooling operation AUX HEAT SWITCH OWNER S MANUAL T0140 Emergency Disables all compressor functions and energizes only Aux Heat to satisfy the heat demand ...

Page 8: ...Mode Switch Press and hold the COOLER and WARMER buttons at the same time until the temperature is displayed in degrees Celsius Repeat this process to display the temperature in degrees Fahrenheit OWNER S MANUAL T0140 COOLER WARMER BUTTONS MODE SWITCH Cool Off or Heat ...

Page 9: ... will be accomplished by following these step by step instructions If you are unsure about any of these steps call a qualified technician for assistance Preparation Make sure your Heat Pump is working properly before beginning installation of the thermostat OWNER S MANUAL T0140 Turn off the power to the Heat Pump system at the main fuse panel 70 HEAT 70 HEAT 70 HEAT 70 HEAT 70 HEAT ...

Page 10: ...Disconnect the wires from the old thermostat Tape the ends of the wires as you disconnect them and mark them with the letter of the terminal for easy reconnection to the new thermostat Keep the old thermostat for reference purposes until your new thermostat is functioning properly Remove Replace Old Thermostat Page 10 OWNER S MANUAL T0140 70 HEAT 70 HEAT 70 HEAT 70 HEAT ...

Page 11: ... on the front of the thermostat fig 1 To open the battery slot press down on the battery cover fig 1 and pull out fig 2 Place the bottom hook of the battery cover into the slot and snap closed fig 4 Remove the old batteries and replace with the new AA alkaline batteries fig 3 FIG 1 FIG 2 Press down Pull out Battery slot FIG 3 Old batteries out New batteries in FIG 4 Snap closed Bottom Hook Bottom ...

Page 12: ...w or the wiring diagrams that follow Wire from the old thermostat terminal marked Function Install on the new thermostat connector marked Energize to Heat C Rc R M Vr A Y1 or Y W1 W or H G or F B O Common Power Cooling Auxiliary Heat Fan Rev Valve Rev Valve C optional R Y W G B O Energize to Cool Page 12 OWNER S MANUAL T0140 70 HEAT ...

Page 13: ...l in all installations If a common wire is not used the thermostat must be powered by two AA alkaline batteries These batteries must be replaced page 11 each year or when the Low Battery indicator is displayed page 3 OWNER S MANUAL T0140 POWER R REVERSING VALVE O COMPRESSOR Y 4 Conductor 18 to 22 gauge unshielded cable from the thermostat to the equipment Common wire optional G FAN O B G W Y R C ...

Page 14: ...nstallations If a common wire is not used the thermostat must be powered by two AA alkaline batteries These batteries must be replaced page 11 each year or when the Low Battery indicator is displayed page 3 5 Conductor 18 to 22 gauge unshielded cable from the thermostat to the equipment FAN G POWER R O REVERSING VALVE COMPRESSOR Y AUXILIARY HEAT W OWNER S MANUAL T0140 Common wire optional O B G W ...

Page 15: ...l in all installations If a common wire is not used the thermostat must be powered by two AA alkaline batteries These batteries must be replaced page 11 each year or when the Low Battery indicator is displayed page 3 OWNER S MANUAL T0140 POWER R REVERSING VALVE B COMPRESSOR Y 4 Conductor 18 to 22 gauge unshielded cable from the thermostat to the equipment Common wire optional G FAN O B G W Y R C ...

Page 16: ...nstallations If a common wire is not used the thermostat must be powered by two AA alkaline batteries These batteries must be replaced page 11 each year or when the Low Battery indicator is displayed page 3 OWNER S MANUAL T0140 5 Conductor 18 to 22 gauge unshielded cable from the thermostat to the equipment FAN G POWER R B REVERSING VALVE COMPRESSOR Y AUXILIARY HEAT W Common wire optional O B G W ...

Page 17: ...eating On the thermostat slide the Aux Heat Switch to the NORMAL position The Aux Heat icon will appear indicating that the thermostat has energized Aux Heat page 7 TWO STAGE OPERATION The 2nd stage of heat auxiliary heat is turned on when the room temperature is equal to or less than the setpoint minus the 1st stage deadband one degree non adjustable minus the 2nd stage deadband two degrees non a...

Page 18: ...ow room temperature The HVAC unit should energize in the cooling mode Page 6 Note You may need to wait up to five minutes for cooling to energize due to the compressor lockout feature On the thermostat slide the Mode Switch to OFF Slide the Fan Switch to Fan On The fan should turn on and run continuously Page 6 OWNER S MANUAL T0140 70 HEAT 70 HEAT ...

Page 19: ...the batteries Page 10 Adjust the Aux Switch to Normal page 7 Trouble Shooting SYMPTOM The slide switches on the thermostat are very difficult to move CAUSE The backplate of the thermostat is screwed too tightly into a wall that is not perfectly flat REMEDY Loosen the screws holding the thermostat into the wall SYMPTOM The fan does not turn on even though the compressor has energized CAUSE The Fan ...

Page 20: ...attempt to turn on CAUSE The heating setpoint is set too high the Mode Switch is not set for Heat the batteries are too weak or the Aux Heat Switch is set for Emergency REMEDY Consult the Normal Operation section in this manual to Raise the heating setpoint Page 6 Correct the Mode Switch position Page 6 Replace the batteries Page 11 Adjust the Aux Switch to Normal Page 7 P N 88 635 Rev 3 OWNER S M...

Page 21: ...EVER ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS ALL REPLACEMENT PARTS WHETHER NEW OR REMANUFACTURED ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS 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...