CT87A,B,J ROUND® THERMOSTAT

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Set the heat anticipator for your system

IMPORTANT: Setting the heat anticipator allows the thermostat to maintain accurate temperature control.

1.Using a pencil point, move the heat anticipator pointer to the number that you recorded in Step 3, sub-step 3. If you could not find the anticipator setting on the old thermostat, use the setting for your type of system shown in the table below.

Your heating system:

Heat anticipator setting:

 

 

Steam

1.2

 

 

Hot water heat

0.8

 

 

High-efficiency warm air

0.8

 

 

Standard warm air

0.4

 

 

Electric heat

0.3

 

 

2.Snap on the thermostat cover.

NOTE: If the furnace stays on beyond the thermostat set temperature, move the anticipator pointer down by .1 ampere.

If the furnace shuts off before the set temperature is reached, move the anticipator pointer up by .1 ampere.

Never adjust the anticipator below .3 ampere.

Check heating/cooling operation

Check heating

1.Turn the transparent dial to the farthest point left.

2.If your CT87 has a subbase, set the system switch to Heat.

3.Turn the dial until the temperature on the setting scale (Fig. 16) exceeds the room temperature that is shown on the thermometer. The heating system should start.

4.Turn the dial until the temperature on the setting scale is below the room temperature that is shown on the thermometer.

The heating system should stop.

Fig. 16. Checking heating system.

SETTING SCALE

THERMOMETER

M9656

69-0274-6

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Honeywell CT87A installation instructions Set the heat anticipator for your system, Check heating/cooling operation

CT87A specifications

The Honeywell CT87A is a well-regarded thermostatic control unit designed for residential and light commercial HVAC applications. Specifically known for its reliable performance and user-friendly interface, the CT87A promotes energy efficiency while ensuring a comfortable indoor environment. This model is often referred to as the "Round" thermostat, with its distinctive circular design making it a recognizable fixture in homes.

One of the main features of the CT87A is its straightforward mechanical operation. Utilizing a bimetallic strip, it provides accurate temperature readings and control without the need for complex programming. This simplicity is a significant advantage for users who prefer a manual approach over digital displays and smart technologies. The CT87A comes with an easy-to-read temperature scale, allowing users to adjust the setting effortlessly to their desired comfort level.

In terms of technology, the CT87A functions purely on mechanical principles, making it highly durable over time. The thermostat operates on a 24-volt system, which is standard in many residential heating and cooling units. It is capable of controlling both heating and cooling systems, providing versatility for year-round use. Additionally, it allows for compatibility with a variety of HVAC equipment, making it an ideal choice for homeowners looking to upgrade their system without extensive modifications.

A notable characteristic of the Honeywell CT87A is its ability to deliver consistent performance with minimal power consumption. This contributes to energy savings, making it an environmentally-friendly choice for conscientious consumers. The conventional design does not rely on batteries or complicated electrical systems, reducing maintenance costs and the risk of failure.

Furthermore, the CT87A includes a built-in anticipator that helps to prevent temperature swings, enhancing user comfort. This feature enables the thermostat to adjust its operation slightly ahead of actual heating or cooling demands, ensuring that the desired room temperature is reached more efficiently.

In summary, the Honeywell CT87A thermostat combines reliable mechanical operation, energy efficiency, and ease of use, making it an excellent choice for those who appreciate simplicity and performance in temperature control. Its time-tested design, coupled with essential features, places it among the favorites for homeowners seeking a balance between functionality and comfort. Whether for a heating or cooling system, the CT87A consistently meets the demands of everyday use, ensuring a pleasant living environment.