Venstar T1035 Installation Instructions

[Page 1] Venstar T1035

Use with most Air Conditioning & Heating Systems including: 1 Stage Electric Cooling & 1 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat. Digital Thermostat Digital Thermostat residential T1035 THERMOSTAT INSTALLATION IN...

[Page 2] Venstar T1035

Page 2 Contents Page # Remove Old Thermostat Safety Warnings Preparation Battery Replacement Warranty Test Operation Troubleshooting Wire Connections Jumper Configuration INSTALLATION INSTRUCTIONS T1035 ...

[Page 3] Venstar T1035

CAUTION Follow Installation Instructions carefully. DISCONNECT POWER TO THE HEATER - AIR CONDITIONER BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT. WARNING Page 3 Safety Warnings CAUTION The two Alkaline “AA” batteries mus...

[Page 4] Venstar T1035

Page 4 These tools will be required: Flat Blade Screwdriver Wire cutter & Stripper Make sure your Heater/Air Conditioner is working properly before beginning installation of the thermostat. Carefully unpack the thermostat. Save the screws and in...

[Page 5] Venstar T1035

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. Disconnect the wires from the old thermostat. Tape the ends of the wires as...

[Page 6] Venstar T1035

Su PM I2:00 : Page 6 INSTALLATION INSTRUCTIONS T1035 The batteries must be replaced immediately when the thermostat displays the low battery icon (fig. 1). If the thermostat is connected to 24v power, the batteries should still be in...

[Page 7] Venstar T1035

Page 7 INSTALLATION INSTRUCTIONS T1035 Su PM I2:00 : 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...

[Page 8] Venstar T1035

Page 8 Sample Wiring Diagrams Gas or Electric Heat Common wire is optional 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 6) each year or when ...

[Page 9] Venstar T1035

Page 9 Sample Wiring Diagrams Gas or Electric Heat 4 Wire, 1 Stage Cooling, 1 Stage Heating-Heat Pump with O reversing valve. Residential Heat Pumps, split systems & package units, with no auxiliary heat. For jumper configuration see page 16. Com...

[Page 10] Venstar T1035

Sample Wiring Diagrams Gas or Electric Heat Page 10 4 Wire, 1 Stage Cooling, 1 Stage Heating-Heat Pump with B reversing valve. Residential Heat Pumps, split systems & package units, with no auxiliary heat. For jumper configuration see page 17. Co...

[Page 11] Venstar T1035

Sample Wiring Diagrams Gas or Electric Heat Page 11 3 Wire, 1 Stage Heating Residential Gas or Electric Heat units with a separately controlled fan. For jumper configuration see pages 14 and 15. Common wire is optional in all installations. If a com...

[Page 12] Venstar T1035

Sample Wiring Diagrams Gas or Electric Heat Page 12 2 Wire, 1 Stage Gas Heat Residential Gas or Millivolt units. For jumper configuration see page 14. Common wire is optional in all installations. If a common wire is not used the thermostat must be ...

[Page 13] Venstar T1035

Page 13 Sample Wiring Diagrams Gas or Electric Heat Dual Transformer 5 Wire, 1 Stage Cooling, 1 Stage Heating Residential Gas or Electric Heat, Electric Cool, split systems & package units. For jumper configuration see pages 14 and 15. If a c...

[Page 14] Venstar T1035

Page 14 Jumper Configuration *Output active depending on O/B jumper configuration - For normal operation do not connect to equipment. OUTPUTS No Demand With Demand Cooling Mode Heating Mode O/B* Y, G, O/B* O/B* W, O/B* Cooling and Gas Heating Res...

[Page 15] Venstar T1035

Page 15 Jumper Configuration OUTPUTS No Demand With Demand Cooling Mode Heating Mode O/B* Y, G, O/B* O/B* W, G, O/B* *Output active depending on O/B jumper configuration - For normal operation do not connect to equipment. Cooling and Electric Hea...

[Page 16] Venstar T1035

Jumper Configuration Cooling and Heating - Heat Pump with O reversing valve. Residential Heat Pumps, split systems & package units, with no auxiliary heat. Page 16 OUTPUTS No Demand With Demand Cooling Mode Heating Mode O Y, G, O - Y G, Y...

[Page 17] Venstar T1035

Jumper Configuration Cooling and Heating - Heat Pump with B reversing valve. Residential Heat Pumps, split systems & package units, with no auxiliary heat. OUTPUTS No Demand With Demand Cooling Mode Heating Mode Y, G B Y , G, B Y active in He...

[Page 18] Venstar T1035

Test Operation On the thermostat, slide the Mode Switch to HEAT. Press the COOLER or WARMER button until the set temperature is 10 degrees above room temperature. The HVAC unit should energize in the heating mode. Note: You may need to wait up...

[Page 19] Venstar T1035

Page 19 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 th...

[Page 20] Venstar T1035

Page 20 Trouble Shooting SYMPTOM: The Heating does not attempt to turn on. CAUSE: The heating setpoint is set too high, the Mode Switch is not set for Heat, or the batteries are too weak. REMEDY: Consult the Normal Oper...

[Page 21] Venstar T1035

Page 21 Warranty One-Year Warranty - This Product is warranted to be free from defects in material and workmanship. If it appears within one year from the date of original installation, whether or not actual use begins on that d...