Installation Procedure, Mounting Panel | White Rodgers 21D83M-843

!WARNING

FIRE HAZARD

•Do not exceed the specified voltage.

•Replace existing control with exact model and dash number.

•Protect the control from direct contact with water

(dripping, spraying, rain, etc.).

•If the control has been in direct contact with water, replace the control.

•Label all wires before disconnection when servic- ing controls.Wiring errors can cause improper and dangerous operation.

•Route and secure wiring away from flame.

SHOCK HAZARD

•Disconnect electric power before servicing.

•Ensure proper earth grounding of appliance.

•Ensure proper connection of line neutral and line hot wires.

EXPLOSION HAZARD

•Shut off main gas to appliance until installation is complete.

!CAUTION

Do not short out terminals on gas valve or primary control. Short or incorrect wiring may damage the thermostat.

MOUNTING PANEL

The Mounting Panel is required in Procedure 1 and Proce- dure 2. It will become part of the installation for Procedure

1.It will be used as a template for locations to drill holes in Procedure 2, Step 4A and 4B. It will become part of the installation in Procedure 2, Step 4C.

C AA

Arrow on front of panel

Figure 1 – Mounting Panel

INSTALLATION

PROCEDURE 1

REPLACING 10M9301, 12L6901, 32M8801,

50A65-120, 50A65-121 or 56L8401

Mounting panel

Circuit breaker in series between Pin 3 and Transformer (TH)

Optional 4" blue wire to connect to Transformer (TH)

Photo 1

1.Disconnect all electrical power and shut off the gas supply to the furnace.

2.Remove the access panel.

3.Disconnect wiring and remove existing ignition control board from the control box.

4.Install provided circuit breaker in unit control box or secure circuit breaker to a wire harness using wire ties.

5.Position the provided mounting panel with the arrow on the front of the panel pointing up. Position the replacement 50A66-843 ignition control board over the holes marked "A" in figure 1. Insert the replacement control stand-off fasteners into the holes in the mounting panel.

6.Insert the four provided stand-off fasteners into the back of the mounting panel in the holes marked "B" in figure 1. Insert the replacement control board assembly into the existing holes in the control box or blower panel.

7.Insert provided circuit breaker in series between the blue transformer wire connecting position 3 on the

12-pin connector to the transformer (TH), optional 4" blue wire provided for transformers that have a quick- connect terminal.

8.Connect the remaining 120 VAC hot and neutral wires and the flame sense wire to the replacement control per table 1, page 4.

9.Affix wiring diagram 5001-6973 adjacent to the existing unit wiring diagram.

10.Replace the access panel.

11.Restore the electrical power and gas supply. Refer to the furnace installation instructions for start-up and check-out procedures.

21D83M-843 specifications

The White Rodgers 21D83M-843 is a versatile and reliable thermostat designed for both residential and light commercial use. With its advanced features and user-friendly interface, it continues to be a popular choice among homeowners and HVAC professionals alike.

One of the main features of the 21D83M-843 is its ability to provide precise temperature control. This thermostat utilizes an electronic sensor that allows for accurate monitoring and adjustment of indoor climate, ensuring comfort while optimizing energy efficiency. The device supports multi-stage heating and cooling systems, including conventional and heat pump configurations, making it adaptable to various HVAC systems.

The 21D83M-843 showcases a clear and easy-to-read display, providing users with essential information in real-time. The backlit screen ensures visibility, even in low-light conditions. Additionally, the intuitive user interface simplifies programming and operation, allowing users to set schedules and adjust settings with ease.

Programmable settings are a highlight of the 21D83M-843. Homeowners can enjoy the benefits of scheduling their heating and cooling systems to align with their daily routines, which leads to significant energy savings. The thermostat allows for multiple daily temperature changes, ensuring that the home environment remains comfortable while energy costs are minimized.

One of the standout technologies incorporated in the 21D83M-843 is its adaptive intelligent recovery feature. This innovative technology learns the home’s heating and cooling patterns, allowing the thermostat to anticipate the desired temperature and reach it at the right time. This not only enhances comfort but also further contributes to energy efficiency.

Another notable characteristic is the thermostat’s durability and compatibility with various HVAC systems. It is designed to work seamlessly with 24-volt heating and cooling systems, making it suitable for a wide range of applications. Its robust construction promises long-lasting performance, providing peace of mind to users.

In conclusion, the White Rodgers 21D83M-843 is an outstanding choice for those seeking a reliable, energy-efficient thermostat. With its precise temperature control, user-friendly interface, programmable features, and advanced technologies, it stands out in the crowded thermostat market. Whether for residential or light commercial use, the 21D83M-843 effectively meets the demands of modern heating and cooling needs while promoting comfort and efficiency.