White Rodgers 21D83M-843 Installation Procedure, Mounting Panel, Arrow on front of panel

!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.

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Arrow on front of panel

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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.

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