Venstar inc. 08/07 use with most air conditioning & heating systems including: 1 or 2 stage electric cooling & 2 stage gas heating, heat pump, electric or hydronic heat. Residential heat cool heat pump programmable 7-day programmable 7-day up to & 2-cool up to & 2-cool 2-heat 2-heat thermostat back-...
Table of contents step #1: preparation step #2: remove & replace old thermostat step #3: wire connections step #4: test operation trouble shooting 2 3 4 12 13 caution follow installation instructions carefully. Disconnect power to the heater - air conditioner before removing the old thermostat and i...
*‘mud rings’ or remodel boxes will not fit. 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 junction box*. Flat blade screwdri...
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...
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. Wire from the old thermostat terminal...
Sample wiring diagrams * if using first stage electric heat, this option must be selected on (see page 13, step 5 of owner’s manual). Gas or electric heat 5 wire, 1 stage cooling, 1 stage gas heat residential gas or electric heat*, electric cool, split systems & package units ck1 gnd rs rs+5 w2 y2 c...
Sample wiring diagrams gas or electric heat 4 wire, 1 stage cooling, 1 stage gas heat residential gas or electric heat*, electric cool, split systems & package units ck1 gnd rs rs+5 w2 y2 c g y1 w1-o-b r power r compressor y w gas valve or strip heat fan g * if using first stage electric heat, this ...
Sample wiring diagrams gas or electric heat 6 wire, 2 stage cooling, 1 stage gas heat residential two stage cooling with gas or electric heat*. Ck1 gnd rs rs+5 w2 y2 c g y1 w1-o-b r power r compressor y w gas valve or strip heat common c fan g 2nd stage cooling y 2 * if using first stage electric he...
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* ck1 gnd rs rs+5 w2 y2 c g y1 w1-o-b r power r compressor y w gas valve or strip heat common c fan g 2nd stage heating w 2 * if using first st...
Commercial gas or electric heat *, electric cool, split systems & package units including commercial heat pumps ** sample wiring diagrams gas or electric heat 7 wire, 2 stage cooling, 2 stage heat ck1 gnd rs rs+5 w2 y2 c g y1 w1-o-b r power r compressor y w gas valve or strip heat common c fan g 2nd...
Sample wiring diagrams * 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). Heat pump ck1 gnd rs rs+5 w2 y2 c g y1 w1-o-b r power r compressor y o /b reve...
Sample wiring diagrams heat pump ck1 gnd rs rs+5 w2 y2 c g y1 w1-o-b r power r compressor y o /b reversing valve** common c fan g 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. 2nd stage heat...
Step #4 test operation 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 app...
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. Tro...
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. Troubleshooting symptom: when calling for cooling, ...
