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 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 HVAC and millivolt gas systems.
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 CT110 in place of the old thermostat. A new location will require moving your wiring. For new installations and relocating the CT110 - follow the guidelines listed below: • Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor, and in a room that is used often.
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 printed near the terminals. Attach labels (enclosed) to each wire for identification. Caution • Label the wires one at a time. You must label all the wires before you proceed.
PG What wires do you have? 4 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 labels from different HVAC system makers. Jumper wire IMPORTANT: The CT110 runs on 4 AA alkaline batteries and/or the C wire if available.
Find the step-by-step diagram for your system W From HVAC R W Go To Page 15 Yn R G W G R C B or O Y R G From HVAC B 4 Wire Heat Pump w/o Aux Heat O From HVAC G W Go To Page 16 Y R or Go To Page 17 Y • Select the reference page C W Y RH RC G with your wiring diagram and 4 Wire Heat/Cool Go To Page 17 G WIRES Multi-stage Cool Multi-Stage Heat WIRES WIRES Wn R From HVAC Go To Page 15 C Wn Yn R G From HVAC 3 Wire Heat CWYRG WIRES 2 Wire Heat CWRG WIRES From HVAC WIR
• “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 wires behind the wall plate. Feed any slack back into the wall opening. • The Wall Plate Frame is optional, but you must have it in place when you thread your wires into the wall plate. PG from HVAC System 2.
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 wall, with the wires coming through the hole in the wall plate. 2. Position wall plate for best appearance. Y C W RH G 3. Attach the wall plate to the wall with the screws provided.
PG 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. + 1.5v AA - + 1.5v AA - 8 + 1.5v AA - + 1.5v AA - The CT110 will power-up in the OFF mode. Your CT110 is not configured to operate your HVAC system yet. You must now configure your thermostat for your HVAC system before you mount it to the wall plate.
• 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 intended and lead to possible damage from overheating or excessive cooling. • If the thermostat batteries fail with the heat OFF, this can result in NO HEAT and possible frozen or broken pipes and water damage.
PG HVAC Setup on Screen IMPORTANT: Make sure the CT110 is powered up and the mode is set to OFF. You must know what your heat source is at this time: either Gas/oil heat or Electric heat (or AUX type for heat pumps.) • Press the + and the - buttons at the same time, for 10 seconds. This will put you in the HVAC SET UP screen. • Use +/- buttons to select HVAC SET UP code on screen. You must select the correct HEAT type for your system.
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 procedures to verify you have correctly installed the CT110. 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.
Communicating Thermostat The CT110 has a built in Z-Wave radio to connect you with a home automation system. This can give you access to your home’s HVAC system even when you are away. It can also give you access to web-based efficient energy management sites that can help you save money and protect the environment. Refer to specific instructions that came with your Z-Wave Hub on how to join a device to your Z-Wave network. Joining a Z-wave network... 1.
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 batteries, 24VAC (C wire), or 24VAC adapter. It cannot be used with line voltage HVAC systems.
PG Step-by-step wiring diagrams HVAC SYSTEM 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. Your heater is now connected to the CT110. Please Go To Page 6 R W C THERMOSTAT TERMINAL WIRES 3 Wire Heat STEP 1 - Connect the R (or RH) wire to the RH terminal. This connects the heat power.
WIRES W Y RH G 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 to the G terminal on the thermostat. This THERMOSTAT TERMINAL connects the fan. STEP 5 - Optional - Connect the C wire to the C terminal. Your HVAC system is now connected to the CT110.
PG Multi-stage Heat and Multi-stage Cool The CT110 can handle up to 2 stages of HEAT and 2 stages of COOL. STEP 1 - Connect the W, W2 wires to the W terminal. This connects the stages of HEAT. STEP 2 - Connect the Y and Y2 wires to the Y terminal. This connects the stages of COOL. STEP 3 - Connect the RH or R wire to the RH terminal. This connects the power. STEP 4 - Connect the G wire to the G terminal. This connects the fan. STEP 5 - Optional - Connect the C wire to the C terminal.
O or B AUXn Yn 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 O wire to the O terminal and D O NOT connect B to B terminal (see wire reference under Trane for B wire terminal). STEP 2 - Connect the AUX 1, AUX 2, to the AUX 1 and 2 respectively. This connects the auxiliary heat.
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 / AUX2 W2 2nd stage HEAT or 2nd stage of 2 stage auxiliary heat W3 / AUX3 W3 3rd stage HEAT or 3rd stage of 3 stage auxiliary heat Y Y COOL control or 1st stage compression for heat pump Y2 Y2 2nd
Wire Reference cont. Zoned Hot Water Heat - 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 For Solenoid valve or Motor valve connect the wires based on diagrams below to the correct terminal on the CT110. The third wire on your valve may be called 6, Y, or G.
FCC and IC Statemen 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 equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction, may cause harmful interference to radio communications.
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 appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence.
