STEP 2. REMOVE OLD THERMOSTAT

❑Test your heating and cooling systems to make sure they work properly. If either system does not work, contact your local heating/air-conditioning dealer. To avoid compressor damage, do not operate the cooling system when outdoor temperature is below 50°F (10°C).

❑Turn off power to the system at the furnace or the fuse/circuit breaker panel.

❑Carefully unpack your new thermostat and wallplate. Save package of screws, instructions, and receipt.

❑Remove the cover from the old thermostat. If the cover does not snap off when pulled firmly from the bottom, check for a screw or screws used to lock on the cover.

❑Loosen the screw or screws holding the thermostat to the wallplate and lift the thermostat away.

❑Disconnect the wires from the old thermostat. As you disconnect each wire, attach the enclosed labels with the old terminal designation. If there are only two wires, they do not need to be labeled. Wrap the wires around a pencil as shown to keep them from falling back into the wall.

Special Installations

Read this section if you are replacing:

•Clock thermostat with separate wires for the clock.

•Thermostat with six or more wires connected to it.

•Thermostat in a heating only system with three wires.

WIRES THROUGH WALL OPENING

Replacing a Clock Thermostat that has C or C1 Clock Terminals

M5136

 

If you are replacing a Honeywell Chronotherm® Thermostat, you may find one or two

wires going to the C or C1 clock terminals on the Chronotherm wiring wallplate. Do not allow them to touch, or you can damage the transformer. Disconnect the wires and wrap them separately using electrical tape. Do not wrap them together. Place the wires where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation labels of the remaining wires.

Replacing a Thermostat that has Six or More Wires

If there are six or more wires (excluding clock wires attached to terminals), you probably have a variation of a multistage heat pump or other multistage system. This thermostat is not compatible with multistage systems, so return the product to the place of purchase. For information about which programmable thermostats will work with your system, call Honeywell Customer Relations Center, at 1-800-468-1502.

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Honeywell CT3500/CT3595 Remove OLD Thermostat, Special Installations, Replacing a Thermostat that has Six or More Wires
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CT3500/CT3595 specifications

The Honeywell CT3500 and CT3595 are advanced thermostat models designed to deliver optimal comfort and energy efficiency for residential and commercial spaces. Both models reflect Honeywell's commitment to innovation in climate control technology, providing users with smart features that enhance convenience and sustainability.

One of the standout features of the CT3500 and CT3595 is their intuitive user interface. With a large, easy-to-read display, these thermostats allow users to monitor and adjust temperature settings effortlessly. The touchscreen functionality simplifies operations, making adjustments quick and straightforward, which is especially useful for people with busy lifestyles.

Both models offer programmable scheduling options, allowing users to set different temperature profiles based on their daily routines. This feature is particularly beneficial in conserving energy, as homeowners can program the thermostat to reduce heating or cooling during hours when the space is unoccupied. With the option to create unique schedules for weekdays and weekends, the CT3500 and CT3595 provide significant flexibility.

The CT3500 and CT3595 are equipped with advanced learning algorithms that enable them to adapt to user preferences over time. Through continuous monitoring, these thermostats learn when users typically adjust the temperature, allowing them to optimize energy usage while maintaining comfort levels. This smart learning capability contributes to improving energy efficiency and reducing utility costs.

Additionally, both models are compatible with a variety of HVAC systems, enhancing their versatility and installation options. Whether utilized with conventional heating and cooling systems or more advanced setups such as heat pumps, these thermostats ensure users can manage their climate control effectively.

Another key feature is the energy-saving reminders, which prompt users to perform maintenance tasks, such as changing filters. This capability helps maximize system efficiency and prolong the life of heating and cooling equipment, ensuring that the system operates smoothly.

The CT3595 takes it a step further by incorporating Wi-Fi connectivity, allowing remote access via smartphones or tablets. This feature enables users to control their home environment on-the-go, making adjustments from anywhere at any time, which is invaluable for those who travel frequently or have unpredictable schedules.

In summary, the Honeywell CT3500 and CT3595 offer users a blend of user-friendly design, intelligent programming capabilities, and energy-efficient performance. With their modern features, these thermostats are well-suited for anyone looking to enhance their home or office's comfort while keeping energy costs in check.
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