Install guide ct110 caution • 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 ...
Pg 2 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 printe...
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 printe...
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...
Pg 5 find the step-by-step diagram for your system • select the reference page with your wiring diagram and set-up information below. • the c-wire is optional but preferred. Without a c-wire the ct110 will operate on batteries only for about one year. • hot water systems diagrams are on pg20. • if y...
Pg 6 • “fan out” wires as illustrated with ct110 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 ct110 to fit snug to the wall. • position the wires through the wall plate to the terminal area. • do not bunch...
Pg 7 mount the wall plate to wall note: if you are mounting to sheet rock or if you are using the old mounting holes, use the plastic anchors provided. Mark first and drill a 3/16-in.(4.8mm) hole for the insert at each screw location, then mount the unit. 1. Hold the ct110 wall plate against the wal...
Pg 8 install 4 aa batteries • install 4 aa alkaline batteries [required] following the marked polarity in the battery compartments. Put the battery in negative end first against the spring, then push the positive end in. The ct110 will power-up in the off mode. Your ct110 is not configured to operat...
Pg 9 • always use new alkaline batteries. • failing to replace the batteries, when necessary, could cause the thermostat to lose power or malfunction. If the thermostat loses power, then the thermostat will not control the temperature which could result in your hvac system not functioning as you int...
Pg 10 snap ct110 to wall plate snap the ct110 onto the wall plate. Take care to align with mounting posts at top and the contact pins at the bottom. With ct110 on the wall plate it is time to turn the ac power back on. Do this at the breaker you used to switch it off. Test installation follow these ...
Pg 11 snap ct110 to wall plate snap the ct110 onto the wall plate. Take care to align with mounting posts at top and the contact pins at the bottom. With ct110 on the wall plate it is time to turn the ac power back on. Do this at the breaker you used to switch it off. Test installation follow these ...
Pg 12 important: if you have labeled and connected your wires and followed the correct hvac setup, and your system still does not operate, contact technical support. Statement of use: this thermostat can be used with 24vac heating and cooling systems and also millivolt heating. It is powered by 4aa ...
Pg 13 important: if you have labeled and connected your wires and followed the correct hvac setup, and your system still does not operate, contact technical support. Statement of use: this thermostat can be used with 24vac heating and cooling systems and also millivolt heating. It is powered by 4aa ...
Pg 14 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 - optional - connect the c wire to the c terminal. Yo...
Pg 15 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...
Pg 16 o or b aux n y n rh g multi-stage heat pump with multi-stage aux heat the ct110 can handle up to 2 stages of pump compression and 2 stages of aux 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...
Pg 17 o or b aux n y n rh g multi-stage heat pump with multi-stage aux heat the ct110 can handle up to 2 stages of pump compression and 2 stages of aux 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...
Pg 18 wire reference table 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 removed) rc rc power for cool (rh not connected to rc jumper removed) w / aux w heat control or heat pump auxiliary heat w2 / aux...
Pg 19 wire reference cont. Possible wires what they control 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 or 2nd stage heat pump auxiliary 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 p...
Fcc regulatory information: note: this equipment has been tested and found to comply with the limits for a class b digital device, pursuant to part 15 of the fcc rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipme...
This device complies with industry canada’s licence-exempt rsss. Operation is subject to the following two conditions: (1) this device may not cause interference; and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le présent app...
