OWNER'S MANUAL Digital 1 For Thermostat MODEL 33CS050/1-FS COMMERCIAL All T0051FS HOTEL THERMOSTAT Programmable MULTI-STAGE PROGRAMMABLE PROGRAMMABLE Digital Thermostat up to 2-heat & 2-cool SmartTemp Equipped Digital Temperature Selection HEAT HEATOnly Can Display Setpoint, COOL PUMP r e AUTO Warm Thermoglow Backlight ff /O On r Coole Easy, Pushbutton WITH 48 Control HOUR Fan ‘Hidden’ Setpoint Limiting CLOCK BACKUP On/Off Warmer Auto-Changeover MountsEquipped Flush with the Wall Dry Contact Backlit d
Table Of Contents Step #1: Preparation 2 Step #2: Remove & Replace Old Thermostat 4 Step #3: Wire Connections 5 Step #4: Test Operation 13 Troubleshooting 14 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. 12/07 P/N T0051FS This device complies with Part 15 of the FCC rules.
STEP #1 PREPARATION WALL 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 FLATSTAT Junction Box*. Flat Blade Screwdriver Wire cutter & Stripper .366” Make sure your Heater/Air Conditioner is working properly before beginning installation of the thermostat. FlatStat in Small J-Box WALL EXTENDS LESS THAN 3/8” FROM THE WALL.
INSTALLING FLATSTAT WALL HANGER TM Installation Instructions - FlatStat Wall Hanger Mark the wall location using the inside opening of the wall bracket as a template. Make sure the rectangle is straight up and down and there is nothing behind the planned opening inside the wall before cutting. Cut through the drywall just outside the outline. Using your fingers, bend the steel tabs around to the inside of the wall as shown.
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 15, step 13 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 15, step 13 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 15, step 13 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 15, step 13 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 15, step 13 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. O/b FAN G COMPRESSOR COMMON C 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 11 of Owner’s Manual). ** This option must be selected O or b during advanced setup (see page 15, step 12 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 11 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 11 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.
