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Radio Thermostat CT50 Install Manual

Other manuals for CT50: Operation Manual

Summary of CT50

  • Page 1

    Pg 1 install guide ct50 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 ele...

  • Page 2

    Pg 2 tools 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 ct50 in place of the old thermostat. A new location will require moving your wiring. For new installations and relocating the ct50 - follow the ...

  • Page 3: Caution

    Pg 2 pg 3 remove old unit switch off electricity to the heating and cooling systems. Then follow these steps: • remove cover from old thermostat. Most are snap-on types and simply pull off. Some have locking screws on the side or front. These must be loosened. Do not remove wires. Note the letters p...

  • Page 4: Y  Rh  Rc  G  A

    Pg 4 what wires do you have? Make sure your wires are labeled. This may require you to find the ‘other end’ connection for each wire on your heating or air conditioning equipment and read the label there. Refer to the wire reference page at end of install section for better understanding of wire lab...

  • Page 5

    Pg 4 pg 5 find the step-by-step diagram for your system • select the referenece page with your wiring diagram and set-up information below. • the c-wire is optional but prefered for all installations [shown dotted in diagrams]. Some radio modules will require the 24vac c-wire power. • if your combin...

  • Page 6: Caution

    Pg 6 • “fan out” wires as illustrated with ct50 below the wall opening. As in the example: fan out the wires so that the c wire is above the c terminal, the w above the w. This allows the ct50 to fit snugly to the wall. Caution do not allow wires to touch each other or parts on thermostat. • wires w...

  • Page 7

    Pg 6 pg 7 mount the ct50 to wall 1. Hold the ct50 against the wall, with the wires coming over the top; above terminal block. The ct50 will cover the hole in the wall. 2. Position ct50 for best appearance. 3. Attach the ct50 to the wall with the screws provided. 4. If you are mounting the ct50 to sh...

  • Page 8

    Pg 8 hvac selection • set the hvac type switch in the norm position if you have conventional natural gas, propane, oil, or electric heat. If you have a heat pump system set the hvac type switch to hp. • set the heat source switch in the gas position if you have normal gas or oil heat or if you have ...

  • Page 9: Caution

    Pg 8 pg 9 caution special battery warning always replace the batteries as soon as the “low batt” flashes. The thermostat requires batteries for mempry back-up. You must be responsible to replace batteries before they run out. Failure to replace batteries can result in overheating or excessive coolin...

  • Page 10

    Pg 10 hvac setup on screen important: make sure the ct50 is powered up and the mode is set to off. Hvac selection switches must be set first [pg 8]. • with mode in off press menu and touch hvac set up. • use +/- icons to select hvac set up number on screen. The lcd display will show your selection a...

  • Page 11

    Pg 10 pg 11 test installation follow these procedures to verify you have correctly installed the ct50. To check fan (if you connected the g wire): press the fan button to turn the fan on. Verify that air is blowing from the system. Press the fan button again to return to auto. To check heat set the ...

  • Page 12

    Pg 12 congratulations, you have successfully installed your unit. Please proceed to the operating guide to initialize the ct50. Important: after you have labeled and connected your wires, followed the correct hvac setup, and your system still does not operate, contact support@ radiothermostat.Com or...

  • Page 13

    Pg 12 pg 13 step-by-step wiring diagrams wires 2 wire heat gas millivolt or 24vac system step 1 - connect the r (or rh) wire to the rh terminal. This connects the heat power. Step 2 - connect the w wire to the w terminal. This connects the heat. Step 3 - set hvac selection switches to normal and gas...

  • Page 14

    Pg 14 w y rh g wires 4 wire heat/cool step 1 - connect the w wire to the w terminal. This connects the heat. Step 2 - connect the y wire to the y terminal. This connects the cooling compressor. Step 3 - connect the rh or r wire to the rh terminal. This connects the power. Step 4 - connect the g wire...

  • Page 15

    Pg 14 pg 15 4 wire heat pump (heat/cool) without auxiliary heat step 1 - connect o wire to the o terminal or b wire to the b. This connects the change-over valve. If you have both o and b - connect only the o wire to the o terminal and do not connect b to b terminal (see wire reference under trane f...

  • Page 16

    Pg 16 2 stage heat and 2 stage cool step 1 - connect the w wire to the w terminal. This connects the 1st stage of heat. Step 2 - connect the w2 wire to the w2 terminal. This connects the 2nd stage of heat. Step 3 - connect the y wire to the y terminal. This connects the 1st stage of cool. Step 4 - c...

  • Page 17

    Pg 16 pg 17 wire reference chart possible wires what they control r or v or vr rh and rc single power for heat and cool rh or 4 rh power for heat (rh not connected to rc jumper clip removed) rc rc power for cool (rh not connected to rc jumper clip removed) w w heat control w2 w2 2nd stage heat or he...

  • Page 18

    Pg 18 lennox heat pump v or vr or r rh power for heat m or y y cool control y or w or w2 w2 2nd stage heat f or g g fan control r or o o x or x2 or c c trane products [american standard] b c 24vac power (to power thermostat) w or w1 w2 2nd stage heat x2 emergency heat (do not connect, tape off) zone...