21D83M-843

Integrated Single Stage

Furnace Control Replacement Kit

INSTALLATION INSTRUCTIONS

FAILURETO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

Kit includes:

1 – 50A66-843 ignition control board 1 – Wiring harness (9-pin to 12-pin)

1 – Wiring harness (4-pin to 6-pin)

1 – Mounting panel

4 – Stand-off fasteners

1 – Circuit breaker

1 – 4" blue wire

2 – Wiring diagrams

The kit includes the 50A66-843 which is an automatic gas interrupted ignition control that employs a microprocessor to continually monitor, analyze, and control the proper operation of the gas burner, inducer, and fan.

DESCRIPTION

The 21D83M-843 kit will replace the following Controls:

Lennox

White-Rodgers

Page

Reference

 

 

 

 

 

10M9301

32M8801

50A65-120

3

PROCEDURE 1

12L6901

56L8401

50A65-121

 

Figure 1, Picture

 

 

 

 

1, Table 1, Wiring

 

 

 

 

Diagram 5001-6973

 

 

 

 

 

24L8501

 

50A62-120

4

PROCEDURE 2

63K8901

 

50A62-121

 

Figure 1, Picture

97L4801

 

50A62-820

 

2, Table 2, Wiring

 

 

 

 

Diagram 5001-6972

 

 

 

 

 

100925-01

30W2501

21D83M-843

5

PROCEDURE 3

100925-03

69M0801

50A66-122

 

 

17W9201

69M1501

50A66-123

 

 

23W5101

83M00

 

 

 

 

 

 

 

 

These controls incorporate system fault analysis for quick gas flow shut-off, coupled with automatic ignition retry upon sensing a fault correction.

Follow instructions for replacement of your model num- ber under the heading INSTALLATION.

Installation should be done by a qualified heating and air conditioning contractor or licensed electrician.

If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor or licensed electrician.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical codes and ordinances.

This control is a precision instrument, and should be handled carefully. Rough handling or distorting compo- nents could cause the control to malfunction.

Following installation or replacement, follow manufacturer’s recommended installation/service instructions to ensure proper operation.

!CAUTION

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

PRECAUTIONS

!WARNING

Failure to comply with the following warnings couldresult in personal injury or property damage.

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 servicing 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 installa- tion is complete.

www.white-rodgers.com

PART NO. 37-7337B

Replaces 37-7337A

www.emersonclimate.com

1244

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White Rodgers 21D83M-843 installation instructions Installation Instructions, Description, Precautions
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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.
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