Venstar T1100FS Programmable Thermostat Installation Instructuion

Venstar T1100FS Programmable Thermostat

Features

• Control up to 2 Heat & 2 Cool Stages
• 7-Day Programmable
• 4 Settings/Day
• Auto Changeover
• 5 minute Built-In
• Compressor Protection
• Self-Prompting Programming with Copy Command
• Display Either F or C
• Mounts Flush with the Wall
• Back-Lit display
• One For All Works with Virtually All Equipment
• Non-Volatile memory
• Keypad lockout
• Single or Dual setpoint with Adjustable Deadband
• ‘O’ or ‘B’ Terminal
• Optional: Outdoor Sensor
• Programmable Fan

Use with most Air Conditioning & Heating Systems including 1 or 2 Stage Electric Cooling & 2 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.

Installation Instructions

CAUTION Follow Installation Instructions carefully. DISCONNECT POWER TO THE HEATER – AIR CONDITIONER BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT.
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.

STEP #1

PREPARATION

• Proper installation of the thermostat 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.

Assemble tools & recommended

• Make sure your Heater/Air Conditioner is working properly before beginning installation of the thermostat.
• Carefully unpack the thermostat. Save the screws, wall anchors, and instructions.
• Turn off the power to the Heating/Air Conditioning system at the main fuse panel. Most residential systems have a separate breaker for disconnecting power to the furnace.
• ‘Mud rings’ or Remodel boxes will not fit.

STEP #2

REMOVE & REPLACE OLD THERMOSTAT

• 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 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 the white plastic wire connector from the rear of the thermostat. Install wires as directed. Press the wired connector on the back of the thermostat.
  For best operation, install the thermostat in a junction box that is free from drafts that originate inside the wall.

STEP #3

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.

• C may not be used on all systems.
• O/B is used if your system is a Heat Pump.

Sample Wiring Diagrams

Gas or Electric Heat

5 Wire, 1 Stage Cooling, 1 Stage Gas Heat 
Residential Gas or Electric Heat*, Electric Cool, split systems & package units

If using first stage electric heat, this option must be selected ON (see page 13, step 5 of Owner’s Manual).

4 Wire, 1 Stage Cooling, 1 Stage Gas Heat
Residential Gas or Electric Heat*, Electric Cool, split systems & package units.

If using first stage electric heat, this option must be selected ON (see page 13, step 5 of Owner’s Manual).

6 Wire, 2 Stage Cooling, 1 Stage Gas Heat
Residential two stage cooling with Gas or Electric Heat*.

Note: If using first stage electric heat, this option must be selected ON (see page 13, step 5 of Owner’s Manual).

6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential & commercial 1 Stage Cooling, with 2 Stage Gas or Electric Heat.

If using first stage electric heat, this option must be selected ON (see page 13, step 5 of Owner’s Manual).

7 Wire, 2 Stage Cooling, 2 Stage Heat 
Commercial Gas or Electric Heat *, Electric Cool, split systems & package units including Commercial Heat Pumps.

If using first stage electric heat, this option must be selected ON (see page 13, step 5 of Owner’s Manual). ** Commercial heat pumps do not have the heat pump turned ON in advanced setup (see page 12, step 3 of Owner’s Manual).

Heat Pump

5 Wire, 1 Stage Cooling, 1 Stage Heat-Heat Pump* with O or b reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.

This option must be selected ON during advanced setup (see page 12, step 3 of Owner’s Manual).
This option must be selected O or b during advanced setup  (see page 13, step 4 of Owner’s Manual).

6 Wire, 1 Stage Cooling, 2 Stage Heat-Heat Pump* with O or b reversing valve.
Residential Heat Pumps, split systems & package units, with auxiliary heat.

This option must be selected ON during advanced setup (see page 12, step 3 of Owner’s Manual).
This option must be selected O or b during advanced setup  (see page 13, step 4 of Owner’s Manual).

STEP #4

TEST OPERATION

• Turn the power on to the Heating/Air Conditioning system.
• Press the MODE button repeatedly until the HEAT icon appears on the display. Press the UP or DOWN buttons until the set temperature is 10 degrees above room temperature. The HVAC unit should energize in the heating mode.
• Press the MODE button repeatedly until the COOL icon appears on the display. Press the UP or DOWN buttons until the set temperature is 10 degrees below room temperature. The HVAC unit should energize in the cooling mode.
  NOTE: Most equipment has a time delay of 5 minutes between cool cycles. This feature is defeatable on the thermostat (see page 13, step 8 of the Owner’s Manual).
• Press the UP button until the setpoint is equal to the room temperature. Press the FAN button to Fan On. The fan should turn on and run continuously.

TROUBLESHOOTING

• SYMPTOM: When using 4 wires (R, G, W, Y), the air conditioning equipment tries repeatedly to turn on, but cannot. At times the display dims or disappears.
  CAUSE: There is not enough power available to “power share”.
  REMEDY: Connect a 250 ohm, 10 watt power resistor at the furnace as shown below.
• 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: See page 13 of the Owner’s Manual and configure step 8 to defeat the 5- minute compressor lockout.
• SYMPTOM: The display is blank.
  CAUSE: Lack of proper power.
  REMEDY: Make sure power is turned on to the furnace and 24vac between R & W. If C is used, 24vac between R & C.
• SYMPTOM: When controlling a residential heat pump, and asking for cooling, the heat comes on.
  CAUSE: Heat pump is not selected “ON” in the Advanced Setup.
  REMEDY: See page 12 of the Owner’s Manual and configure step 3 to enable heat pump operation.
• SYMPTOM: When calling for cooling, both the heat and cool come on.
  CAUSE: The thermostat is configured to control a heat pump and the HVAC system is a “conventional” (non-heat pump) system.
  REMEDY: See page 12 of the Owner’s Manual and set step 3 to OFF to enable gas-electric operation.

References:

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Venstar T1100FS Programmable Thermostat Installation Instructuion

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Venstar T1100FS Programmable Thermostat Owner Manual

Venstar T1100FS Programmable Thermostat Installation Instructuion