Справочник Пользователя для White Rodgers 21D83M-843 Replacement Kit for Lennox Single Stage Nitride Ignition

4

 

over the marks. Use the mounting  panel  

 

as a template to drill 3/16" holes through  

 

each of the holes marked "A". Install the   

 

replacement control in the freshly drilled holes  

 

in the blower access panel. Use aluminum tape  

 

to seal the unused holes.

B. 

When replacing original 63K8901 board in 
downflow applications – Look at the existing 
control board holes as if the unit were installed 
in the upflow position. Make a mark 5/8" 
ABOVE each of the existing mounting holes. 
Position the provided mounting panel so that 
the holes marked "C" in figure 1, page 3 are 
over the marks. Use the mounting panel as a 
template to drill 3/16" holes through each of 
the holes marked "A". Install the replacement 
control in the freshly drilled holes in the blower 
access panel. Use aluminum tape to seal the 
unused holes.

C.  

All other units – Position the provided 
mounting panel so that the arrow on the 
front of the panel is pointing up. Position the 
replacement 50A66-843 ignition control board 
over the holes marked "A" in figure 1, page 3.

 

Insert the replacement control stand-off 
fasteners into the holes in the mounting panel.

 

80UHG, 90UGF, G23, G26, GHR26, G32, 
GHR32, G40, G41, G50, G51, G60 and G61 
units – Insert the four provided stand-off 
fasteners into the back of the mounting panel in 
the holes marked "B" in figure 1. 

and G27M units –  Insert the four provided 
stand-off fasteners into the back of the mounting 
panel into the holes marked "C" in figure 1. 

 

Insert the replacement control board assembly 
into the existing holes in the control box or 
blower panel.

5.  Insert provided circuit breaker in series between 

the blue wire on Pin 3 of the wiring harness (9-pin 
to 12-pin) and the blue transformer wire. Optional 
4" blue wire provided for transformers that have a 
quick-connect terminal.

6.   Connect the provided 9-pin to 12-pin wiring 

harness to the unit 9-pin connector.

7.  Connect the provided 4-pin to 6-pin wiring harness 

to the unit 6-pin connector.

8.  Connect the yellow wire from position 6 on the 12-

pin connector to the yellow transformer wire. 

9.  Connect GND wire to equipment ground.
10.  Connect the remaining 120 VAC hot and neutral 

wires and the flame sense wire to the replacement 
control per table 2, page 5 .

11.  Affix wiring diagram 5001-6972 adjacent to the 

existing unit wiring diagram

12.  Replace the access panel.
13.  Restore the electrical power and gas supply. Refer 

to the furnace installation instructions for start-up 
and check-out procedures.

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.   A. 

downflow applications – Look at the existing  

 

control board holes as if the unit were installed  

 

in the upflow position. Make a mark 1" to the 

 

 

right of each of the existing mounting holes. 

 

 

Position the provided mounting panel so that 

 

 

the holes marked "C" in figure 1, page 3 are  

Optional 4" blue 

wire to connect to 

Transformer (TH)

Circuit breaker
in series between 
Pin 3 and Trans-
former (TH)

Wiring harness
(4-pin to 6-pin)

Mounting panel

Wiring harness
(9-pin to 12-pin)

Transformer

GND

L1

120 VAC

COOL-H

COOL

HEAT-H

HEAT

PARK (2)

PARK (2)

EAC-H

EAC

LINE-H

LINE

XFMR-H

XFMR

HUM-H

HUM

NONE

FAN

Neutral 

120 VAC

LINE-N

Neutral 

120 VAC

(5)

HUM-N

EAC-N

XFMR-N

CIR-N

Flame Sense

E33

FS