Honeywell CT87A installation instructions Level the wallplate or subbase

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CT87A,B,J ROUND® THERMOSTAT

 

1.

Place the cover ring against the outlet box so that the arrow in the

 

2.

middle of the cover ring is pointing up.

 

Pull the wires through the wiring hole on the bottom left side of the

 

3.

cover ring.

 

Align the screw slots on the cover ring with the outlet box screw

 

 

holes, and attach the cover ring to the outlet box with two 1/2-in.

 

4.

screws.

 

Place the wallplate or subbase over the cover ring so that the wiring

 

5.

holes line up, and pull the wires through.

 

Loosely attach the wallplate/subbase to the cover ring with two 1/4-

 

 

in. screws, through the screw holes on the left and right sides of the

 

 

wallplate/subbase.

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Level the wallplate or subbase

IMPORTANT: The wallplate/subbase must be level to maintain accu-

 

rate thermostat temperature.

 

1.

Rotate the wallplate/subbase until level as shown in Fig. 6.

 

 

To level the subbase, use the leveling posts directly below the Heat

 

 

and Fan indicators.

Fig. 6. Leveling the wallplate.

SPIRIT

LEVELING

LEVEL

POSTS (2)

OPENING FOR

 

THERMOSTAT

MOUNTING

WIRING

SLOTS

 

 

M3319A

2.Tighten the mounting screws after making sure that the wallplate or subbase is level.

5

69-0274-6

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Contents Verify that you have the correct thermostat Installation InstructionsCompatible with Heating/Cooling systemRequired Tools Optional Tools Prepare for installationRemove the old thermostat If installing on the wall Install the cover ring and wallplate or subbaseInstalling wallplate/subbase on an outlet box subbase shown If installing on an outlet boxLevel the wallplate or subbase Wire Label Connect to Wire the thermostatWiring Cross-reference CT87A for a 2-wire heating only system CT87B for a 5-wire heating/cooling system Important This prevents the thermostat from being damaged Set the heat anticipator for your system Your heating system Heat anticipator settingCheck heating/cooling operation Check heatingSwitch Setting Result CT87B, J switchesCheck cooling OperationAutomation and Control Solutions Limited One-Year Warranty

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.