residential Digital Thermostat THERMOSTAT T2300FS 7-Day PROGRAMMABLE up to 2-heat & 2-cool HEAT COOL 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 HEAT PUMP Mounts Flush with the Wall Back-Lit display One For All Works with Virtually All Equipment Non-Volatile memory Holiday/Vacation Programming Keypad lockout Dual setpoint with Adjustable Deadband ‘O’
Table Of Contents Step #1: Preparation 2 Step #2: Remove & Replace Old Thermostat 3 Step #3: Wire Connections 4 Step #4: Test Operation 12 Trouble Shooting 13 CAUTION Follow Installation Instructions carefully. DISCONNECT POWER TO THE HEATER AIR CONDITIONER BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT. WARNING Venstar Inc. 08/07 P/N T2300FS This device complies with Part 15 of the FCC rules.
STEP #1 PREPARATION FLATSTAT EXTENDS LESS THAN 3/8” FROM THE WALL. Flat Blade Screwdriver Wire cutter & Stripper .366” 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.
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.
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. Wire from the old thermostat terminal marked Function G or F Fan Y1, Y or C Cooling W1, W or H Heating Install on the new thermos tat connector marked G Y1 W1,O,B Rh, R, M, Vr, A Power C Common C* R O/b Rev.
Sample Wiring Diagrams Gas or Electric Heat 5 Wire, 1 Stage Cooling, 1 Stage Gas Heat W FAN G COMPRESSOR COMMON C GAS VALVE or STRIP HEAT Y POWER CK1 GND RS RS+5 W2 Y2 R C G Y1 W1-O-B R 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 16, step 6 of Owner’s Manual).
Sample Wiring Diagrams Gas or Electric Heat 4 Wire, 1 Stage Cooling, 1 Stage Gas Heat GAS VALVE or STRIP HEAT W COMPRESSOR Y FAN G POWER CK1 GND RS RS+5 W2 Y2 R C G Y1 W1-O-B R 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 16, step 6 of Owner’s Manual).
Sample Wiring Diagrams Gas or Electric Heat 6 Wire, 2 Stage Cooling, 1 Stage Gas Heat W COMPRESSOR COMMON C 2nd STAGE COOLING Y2 FAN G GAS VALVE or STRIP HEAT Y POWER CK1 GND RS RS+5 W2 Y2 R C G Y1 W1-O-B R Residential two stage cooling with Gas or Electric Heat*. * If using first stage electric heat, this option must be selected ON (see page 16, step 6 of Owner’s Manual).
Sample Wiring Diagrams Gas or Electric Heat 6 Wire, 1 Stage Cooling, 2 Stage Heat Residential & commercial 1 Stage Cooling, with 2 Stage Gas or Electric Heat* W COMPRESSOR COMMON C 2nd STAGE HEATING W2 FAN G GAS VALVE or STRIP HEAT Y POWER CK1 GND RS RS+5 W2 Y2 R C G Y1 W1-O-B R * If using first stage electric heat, this option must be selected ON (see page 16, step 6 of Owner’s Manual).
Sample Wiring Diagrams Gas or Electric Heat Commercial Gas or Electric Heat *, Electric Cool, split systems & package units including Commercial Heat Pumps ** 7 Wire, 2 Stage Cooling, 2 Stage Heat W COMPRESSOR COMMON C 2nd STAGE HEATING 2nd STAGE COOLING Y2 W2 FAN G GAS VALVE or STRIP HEAT Y POWER CK1 GND RS RS+5 W2 Y2 R C G Y1 W1-O-B R * If using first stage electric heat, this option must be selected ON (see page 16, step 6 of Owner’s Manual).
Sample Wiring Diagrams 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. R O/b COMPRESSOR FAN G REVERSING VALVE** COMMON C POWER Y C G Y1 W1-O-B R CK1 GND RS RS+5 W2 Y2 * This option must be selected ON during advanced setup (see page 15, step 4 of Owner’s Manual). ** This option must be selected O or b during advanced setup (see page 16, step 5 of Owner’s Manual).
Sample Wiring Diagrams Heat Pump 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. O/b COMPRESSOR COMMON C 2nd STAGE HEATING W2 FAN G REVERSING VALVE** Y POWER CK1 GND RS RS+5 W2 Y2 R C G Y1 W1-O-B R * This option must be selected ON during advanced setup (see page 15, 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.
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. R G W Y C TR300-10w 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.
TROUBLESHOOTING 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 15 of the Owner's Manual and configure step 4 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.
