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Radio Thermostat CT80 Install Manual

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16
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Install Guide CT80
Caution
• Your thermostat is a precise instrument, handle it with care.
• Turn off electricity to the HVAC system before installing or
servicing thermostat or any part of the system.
• Do not turn electricity back on until work is completed.
• Do not short (jumper) across electric terminals at the control
on the furnace or air conditioner to test the system. This may
damage the thermostat.
• All wiring must conform to local codes and ordinances.
• This thermostat is designed for use with 24 volt AC and
millivolt systems (with a separate 24VAC power adapter).
• The thermostat relay load should be limited to 1.0 amp;
higher amperage may cause damage to the thermostat.
Caution
To avoid electrical shock and to prevent damage to the
furnace, air conditioner, and thermostat, disconnect the power
supply before beginning work. This can be done at the circuit
breaker, or at the HVAC system.
SA VE
EN ER GY
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H E A T
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TA R G E T
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ENGLISH

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Summary of Contents for Radio Thermostat CT80

  • Page 1 Install Guide CT80 Caution • Your thermostat is a precise instrument, handle it with care. • Turn off electricity to the HVAC system before installing or servicing thermostat or any part of the system. • Do not turn electricity back on until work is completed.

  • Page 2: Remove Old Unit

    You will need a small Phillips screwdriver and a drill with 3/16-in. (4.8mm) bit for wall mounts. LOCATION Replacement installations - mount the CT80 in place of the thermostat. You must have a “C” wire or other 24VAC power available at the CT80 location. A new location will require moving your wiring.

  • Page 3: What Wires Do You Have

    Reference page 13 for better understanding of wire labels from different HVAC system makers. IMPORTANT: C wire or 24VAC power is required for the CT80 to operate. If you do not have a C wire you can run a new wire from the HVAC to the CT80 or provide 24VAC power to operate the CT80 using a standard 24VAC wall transformer.

  • Page 4: Hvac Set-Up On Screen Menu

    With all the wires connected (including the C wire), it is time to turn the AC power back on. Do this at the breaker you used to switch it off. The CT80 will power-up in the control OFF mode. Your CT80 is not confi...

  • Page 5: Set-Up For Normal A/C Cooling Systems

    5. If you have AUXILIARY heat, touch the number of stages (default is [NONE] ) use the +/- buttons to select 1-2 stages. (NOTE: The CT80 controls a maximum of 3 stages total between pump and AUX.) 6. (If you have AUX) Select the type of auxiliary heat that you have - Electric or Gas-Oil.
  • Page 6 Congratulations, you have successfully installed your unit. Please proceed to the OPERATING Guide to initialize the CT80. SA VE EN ER GY IMPORTANT: After you have labeled and connected your wires, TA RG ET and followed the correct HVAC set-up, if these check procedures do...

  • Page 7: Wire Reference Chart

    Humidifi er - FOR EXTERNAL HUMIDIFIER or DEHUMIDIFIER USING To use the CT80 internal humidistat to control an external HVAC SYSTEM's 24 humidifi er unit, connect it as shown. Connect the H terminal to the control leg of the humidifi er relay. This...
  • Page 8 Zoned Systems Reference Your Wires Radio Thermostat Terminal 2 wire Zoned Hot Water 3 Wire Zoned Hot Water Motor Driven Valves R or 5 RH (power) W or 4 W (heat ON) Y or G or 6 (the 3rd wire) A (heat OFF)

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