❑If the thermostat is already mounted on the wall, remove the

thermostat by placing your thumb between the thermostat and wallplate and pulling the thermostat up and away as shown.

When the batteries are running low, a REPL BAT message flashes for one to two months before the batteries run out completely. Replace the batteries as soon as possible once the message flashes.

IMPORTANT

Although the thermostat has a low battery indicator, replace the batteries once per year to prevent leakage and to prevent the thermostat and heating/cooling sys- tem from shutting down due to lack of battery power in the thermostat.

If you insert new batteries within 20 to 30 seconds of removing the

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old batteries, the system retains the current time and day. If the

display is blank, the batteries are dead or installed incorrectly. You must reset the time and day. Refer to Set the Clock for instructions.

60

60

70

70

80

80

90

90

As a precaution when leaving home for longer than a month, change batteries before leaving to prevent the system from shutting down due to lack of power. Always use fresh alkaline batteries. Nonalkaline batteries do not last as long. They also can leak, causing damage to the thermostat and the wall surface. Honeywell recommends Energizer® batteries.

STEP 6. SET FAN OPERATION SWITCH

The thermostat fan operation switch, labeled FUEL SWITCH is factory set in the F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to E. The E setting allows the fan to turn on immediately with the heating or cooling in a system where the G terminal is connected.

FUEL SWITCH

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Honeywell CT3500/CT3595 manual SET FAN Operation Switch, If the thermostat is already mounted on the wall, remove
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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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