Dexter Laundry DL2X30Q Service Procedures And Parts Data

. /

THE
DEXTER

COMPANY

30 LB. Stack Dryer

DL2X30Q Computer

Service Procedures and Parts Data

DL2X30Q

Fairfield, Iowa 52556
www.dxtrco.com

"~

/

!.

--~

.. [

·= . ··_

----~

- ·- . .

11

Telephone [phone]

Fax [phone]

Part No. 8533-036-004

08/04

FOR

YOUR
MINIMIZE
DAMEGE, PERSONAL

IF

YOU SMELL GAS:

SAFETY, THE INFORMATION

THE

RISK

Do

Not

try to light any appliace.

Do

Not

touch

Do

Not

use any phone

Do

clear the room, building

Do

immediately call yo

suppliers instructions.

Do

call the fire department if your gas supplier is

OF

or

FIRE

INJURY

operate

OR

in

ur

WARNING

IN

THIS

EXPLOSION

OR

LOSS

any

electrical switch.

your building.

or

area

gas supplier from a neighbors phone. Follow the

OF

of

all occupants.

MANUAL

OR

TO PREVENT PROPERTY

LIFE.

not

MUST

available.

BE

FOLLOWED

TO

gas

\

2

& WARNING

DRY ONLY FABRICS WASHED IN WATER

TO

AVOID

DO

NOT

-ITEMS
RUBBER-LIKE MATERIALS.

-ANY
WHICH CONTAIN FLAMMABLE LIQUIDS
GASOLINE,

THE

RISK

OF

FIRE, INCLUDING SPONTANEOUS COMBUSTIONS,

DRY:

CONTAINING FOAM RUBBER.

ITEMS

ON

WHICH YOU HAVE USED A CLEANING SOLVENT

OR

OTHER

OILS

OR

ORANY

WAXES.

SIMILARLY TEXTURED

OR

SOLIDS, SUCH

AS

NAPTHA,

OR

'

Table of Contents

SECTION 1

Specifications ......

~

nstallation & Operation ..................................................................................... page

Clearances .................................................................................................................... page 7

Make

up

Electrical ................................................................................... ..................................... page 8

Gas

................................................................................................................................ page 8

..

............................................................................................ page 6

SECTION 2

Air .........................................................

....

...................................................... page 7-8

7-16

Exhaust

Dimensions ..............................................................

Description

Programmed Data ......................................................................................................... page 12

Dexter

Changing Programmed Data ........................................................................................ page 16

....

..................................................................................................................... page 8·9

....

................................................. page 1 0·

of

Control ...........................................

Control Feature Activation ................

.............................................. .........

....

.........

.................................................... page

..

11

page 12

14

SECTION 3

Wiring Schematics ................................. ........................................................... page 17-20

Dryer Idle--No Coins Added .......................................................................................... page

Coins Added--Motor Started & Running ....................................................................... page

Heat Circuit ....................................................

Over Temperature Thermostat ...................................................................................... page 18

Cool Down ..............................................................

......

............ ............................................. page 17-18

....

................................................... page 18

17

17

End

of

Cycle .................................................... .............................................................. page

Schematic ................

Diagram ......................................................................................................................... page

........................................

......

..........................

............................. page

18

19

20

3

SECTION 4

Service Procedures ..........................................

.........

......................................

..

page 21-

27

Clothes Door ................................................................................................................. page

Clothes Door Latch Adjustment .................................................................................... page

Door Switch ................................................................................................................... page

Clothes Door Window & Gasket .................................................................................... page

High Limit Thermostats (burner housing & manual reset) ............................................. page

Pressure Regulator ....................................................................................................... page

Coin Acceptor ................................................................................................................ page

Electronic Control Failure Codes ................................................................................... page 22

Electronic Control Diagnostic Lights ..............................................................

Electronic Control Test Cycle ......................

Electronic Control ..........................................

Membrane Switch ........ ................................................................................................. page

..........

........................................................ page 23

....

............................................................ page

.....

.......... page 22

21

21

21

21

21

22

22

23

23

Temperature Sensor Testing & Replacement ................................................................ page

Temperature Testing ..................................

Front Panel (upper & lower) ........................

Drive Belt ....................................................................................................................... page

Tumbler Pulley ............................................................................................................... page

Intermediate Pulley & Tension Arm ............................................................................... page

Motor & Blower Assembly ............................................................................................. page

Air Flow Switch .............................................................. ................................................ page

Ignition Control Transformer & Fuse .............................................................................. page

Electronic Ignition Module ............................................................................................. page

Ignition System Check Out ............................................................................................ page

Spark Electrode ............................................................................................................. page

........

............................................................ page

....

.............................................................. page

23

23

23

24

24

24

24

24

24

25

25

25

4

Gas

Valve & Manifold

Main Burner Orifice ......................................... ................................. ... .......................... page

Main Burner .......................................................... ........................................................ page

Cylinder .........................................

....

................................................................................................. page

................................................................................ page

26

26

26

26

Tumbler Through Bolt Access Cover ............................................................................. page

27

Bearing Housing ............................................................................................................ page

27

SECTION 5

Trouble Shooting ................................. .............................................................. page 28-30

SECTION 6

Parts Data ......................................................................................................... page 32-46

Cabinet Group .............................................................................................. ................. page 32-35

Door Switch Group ........................................................................................................ page

Bearing Housing Group ................................................................................................. page

Burner Housing Group .................................................................................................. page 38-39

Rear View ..............................................................

Tumbler

Coin Box Group ............................................................................................................. page 44-45

Wiring Group ................................................................................................................. page 46

Group .............................................................................................................. page

..

...................................................... page 40-41

36

37

43

SECTION 7

Maintenance ..................... ...............................................................................

..

page

47-48

5

Section 1

Specifications

30

LB. Coin Stack Dryer

Model: DL2X30Q

120

(lbs

Dry

Voltage

Weight

Capacity

Dimensions

Basket
Basket

Basket
Door
Overall Height
minimum
maximum
Cabinet

Overall
Door
bottom

Necessary
Behind

Depth
Diameter

Volume

Opening

(with

Width

Depth

Height

(floor

of

door)

Service Clearance

Machine

legs)

to

Temperature (degrees)-

Regular/Hot
(fac

tory

setting)

Permanent
(factory

Delicate/Warm
(factory

Press/Medium

setting)
setting)

volts, 60 Hz. Single Phase

.)

2@

30ib

Each=

27

1/2"

30"

11.25cu.ft.
22

11/16"

76 5/8"
77 5/8"
31

1/2"

47 5/16"
top

44 15/

bottom

18"

150-190 F
175

F

120-170 F
150 F

110-150 F
125 F

16"

7 5/16"

60Lb

Cylinder

Directio

Speed

Rotation

n

(RPM)

Gas

Natur

al

(supply
Natural
L.P.
L.P. (burn
Inlet
BTU

(b

(supply

Line
Input

er

urner

line)
manifold)

Size

line

)

manifold)

Venting

Exhaust
Size 2-6"

Maxim
with

Make-up

Ea

ch

Air

um

(2

elbows)

Dryer

Flow

(cfm) 500

Length

Air

(minimum)

1-

Weight

Shippi
Net (lbs.)

ng

(lbs.)

counter

47

4"-10"
31/2"

11"W
112"
80,000

(op

tional)

8"

(sta

ndard

14ft.

1 1/2

737
685

clockwise

w

w.c.

11"-14"

.C.

NPT

)

sq

.c.

w.c

. ft.

.

Electrical

Motor
Running
Circuit
Built-in
Phase
Voltage

·

Service

Wi

re

6

H.P.

(per

Amps

Breaker

Motor

60 Hz. **

Size (min.)

Protection

pocket)
(co

mpl

(amps)

ete

dryer)

Circuit

1/2 H.P.

19.6
30
Yes
Single
120V

2

wire

plus

ground

#10

**

International

Voltages Available

Section 2

Installation and Operation

All commercial dryer installations must conform with local applicable local codes

local codes, with the National Fuel
comply with current standard CAN/CGA-8149(.1
or

Equipment, and local codes if applicable. The appliance,
grounded in accordance with the National Electric Code, ANSI/NFPA No. 70-1990,or when installed
in Canada, with Standard GSA C22.1 Canadian Electrical

Installation Clearances:

This unit may

1. Left side- 0"

2. Right side- O"

3. Back- 18" (Certified for 6" clearance: however 18" is required to clean, service,

4.

5.

6.

-

Front-

Top-

Floor-

be

installed

4"

!---

Gas

Code ANSI 2223.1 A-1988. Canadian installations must

or

at

the following alcove clearances.

and maintain the dryer).
48"

to

allow use of dryer.

to

Refer
This unit may

figure labelled "Vertical Clearance Dimensions".

be

installed upon a combustible floor.

.2) Installation Code for

when

installed, must be electrically

Code

Part 1.

or

in

the absence

Gas

Burning Appliances

of

10

"

(C)

I

1/4"

MIN

.J

(A)

r-

-Vertical Clearance Dimensions.

Makeup

Adequate makeup air must
a minimum of 1 1/2 square feet
effective area. Screens, grills
supplier to determine the free area equivalent for the grill being used.

Air

be

supplied

of

or

to

replace air exhausted

makeup

louvers which will restrict the flow of air must

air

opening to the outside

TOP

SIDE OF DRYER

OF

by

DRYER

dryers

on

all types of installations. Provide

for

each dryer. This is a

be

considered. Consult

net

requirement

~

of

the

The

source of makeup

intakes of all dryers. Multiple openings should be provided.

air

should

be

located sufficiently away from the dryers

to

allow an even

air

flow

to

the

air

7

NOTE: The following considerations must be observed
cleaners are
dryers must be located away from
be drawn into the dryer inlet ducts. Dry cleaner solvent vapors
open flame such as the gas f
corrosive and

installed. The sources

lame

will cause damage

of

all makeup

any

dry

present in clothes dryers.

to

the

dryer ducts and clothes loads.

air

cleaners. This is necessary

for

gas

and room ventilation

The

Electrical Requirements

The electrical requirements necessary
the back panel of each dryer. The electrical connection should be made
the rear

of

the unit, using

ONE 30 Amp circuit breaker is required for each complete stack dryer. The wiring diagram is
located

on

#1

0 AWG wire.

the belt guard on the

to

operate the unit satisfactorily are listed

back

of

the dryer.

dryer installations where dry

air

movement

so

that solvent vapors will not

will decompose

decomposition products are highly

to tlh

e pigtail leads in the outlet box

in

on

the serial plate located on

to

all

contact with

an

on

NOTE:
GROUNDCONDUCTORFROMTHEGROUNDSCREWONTHEDRYERTOTHENEUTRALBAR
SUPPLY BREAKER

NOTE: WHEN INITIALLY CONNECTING POWER
OF

THE

DISPLAYS OR CONTROLS OCCUR, GIVE THE MACHINE

AND

CHECK

IT

IS ABSOLUTELY ESSENTIAL THAT

BOX

.

OPERATION AGAIN.

THE

DRYER BE GROUNDED BY A SEPARATE

TO

THE MACHINE

AN

HOUR

IF

UNUSUAL BEHAVIOR

TO

STABILIZE

Gas Requirements

The complete gas requirements necessary

on

located
the size of the piping
ing

the

A

joint
connections. A 1/8 inch NPT plugged tapping, accessible
ately

A drip tee is provided in the unit gas piping

All pipe connections should
open flame.

the back panel of the dryer.

to

supply the dryer should

local gas supplier.

compound resistant

upstream of

the

gas supply connection to the dryer.

to

the action

be

checked

to

operate the dryer satisfactorily are listed

The

inlet gas connection to

be

determined by reference

of

liquefied petroleum gases should be employed in making pipe

for

to

catch dirt and other foreign articles.

for

leakage with soap solution

the

unit

is

1/2 inch pipe thread. However,

to

the Fuel Gas Code and consult-

test gage connection, must

or

leak detector. Never check with an

on

the serial plate

be

installed immedi-

INTH

E

CAUTION:
supply
of

1/2
individual
at test

Burner

All
be

set

Exhaust

We recommend using the factory designed offset and collector system for exhausting the dryer. This two 6"
into
always be planned and constructed
ing). Any restriction due to pipe size
lint build up in system and the room.

From an operational standpoint, incorrect
thermostat which shuts off the main burners and results in inefficient drying.

Set-Up

gas

burner manifolds should

at

3.5 W.C. while burner operating.

Installation

one

8" collector is designed

The

piping

psig.

pressures

system

The

manual shutoff

dryer

dryer

equal

and

its

individual

during

must

be

to

any

pressure

be

isolated

valve

during

to

or

less

than

1/2

checked

minimize back pressure

so

or

for

proper gas pressure while burning. Stack dryer burners should

that minimum

type

of installation can cause slow drying time, excessive heat, and

or

inadequate exhausting can cause cycling of the high limit

shutoff

from

any

valve

must

testing

pressure

psig.

air

of

that

the

gas

supply

testing

to

the

units. Exhausting

restrictions occur. (Refer

be

disconnected

system

piping

of

the

at

test
sys
gas

to

from

the

pressures

tem

by

closi

supply

of

piping

the dryer should

Figure

on

dryer exhaust-

in

ng

8

gas

excess

its

system

Individual exhausting
by

attaching a pipe
wall. This pipe
clog

the

ducts and prevent

joints must be

exhaust pipe tends to reduce
if

held within practical limits.

straight

used, two feet

,elbows should

the

exhaust pipe passes through a wall, a metal sleeve

If
and

the

mended in

This

type

when

the
would be to point
outlet should be kept clear

made

6"

diameter pipe with

of

be used

exhaust pipe passed through this sleeve.

all cases to protect

of

installation should

dryer

of

the

dryer

of

the

proper

must

be

very

smooth

the

so

the

exhaust

For

straight pipe

to

exhaust each cylinder.

is not in use. A

the

outlet end

by

is

recommended. All heat, moisture, and lint should be exhausted outside

diameter

dryer

the

amount

the

two

right angle elbows be used

shou

ld

the

wall.

have

a means provided
hood
of

the

at

least 24"

to

on

the

inside,

from exhausting properly. All elbows must be smooth

end

of

one pipe

of

air

most

efficient operation,

be removed

with a hinged

pipe downward to prevent entrance

of

the

dryer

adapter collars and extending

as

rough surfaces

is

inside the

the

blower

for

This

damper

any

objects which would

can exhaust. This

each additional elbow.

of

practice is required

to

prevent rain

tend

to collect lint which will eventually

next

one

downstream.

it

is recommended that

for

each cylinder.

No

slightly

can be

larger

diameter should

by

and

high winds from entering

used

for

this purpose. Another method

of

cause

it

out

through

on

The

addition

does not

some local

wind and rain. In either case,

air restrictions.

affect

the

no

more

When

more than two elbows

more than two right angle

be

codes

the

inside. All

dryer

than

set

in

and

an

outside

of

an

operation

14

feet

the

wall

is

the

exhaust

of

are

recom-

the

install a protective screen

Never

When

exhausting a
hausting through a
free

from clogging. The type using a

Exhausting the dryer into a

lint buildup which can

Installation
installation. Wheth
should be

at

of

a 45

NOTE:

duct.
individual
maintained.
from
main discharge duct

dryer

straight

wall. A rain cap must be placed

be

highly combustible.

several dryers where a main discharge duct is necessary, will need

er

using

degree

Never

The

the

dryer) should not exceed

install either

follo

wing

dryer

ducts.

For

angle

each individual cylinder

NOTE: A small diameter

contributing to
duct.

lint build up,

over

the

exhaust outlet.

up

through a roof,

cone

shaped "roof"

chimney

the

illustration shows

or

under

8" exhaust kit

in

the

direction

the

a· kit

The

main duct can be rectangular

at

the

last

dryer

duct

will restrict air

An

inspection

DIAMETER

the

ove

rall length

on

top

of

the

over

the pipe

a building is not permitted. In either case there is a

or

individual 6" ducts, entrance into the main discharge

of

discharge air flow.

or

individual 6" ducts

the

various round main duct diameters to

the

total exhausting (main discharge duct plus duct outlet

the

equivalent

must be maintained to exhaust end.

TO

INCREA

of

14

flow

, a large diameter duct will reduce

door

should

SE

AS

of

the

duct

has

exhaust

or

teet

be

SHOWN

and

must

is

suitable

at

a right angle into

round, provided adequate

and

two

provided

for

this application.

the

elbows.

for

periodic clean-out

the

same

be

of

such a

following considerations

the

use

The

limits as ex-

type

danger

main

discharge

with

the

air

diameter

air

velocity, both

of

as to

duct

flow

of

the

be

of

for

is

the

main

- Dryer Exhausting

~----------------

--------

Using

\

JNSTALLNO

f SCREEN

....__

....

/

COVER

I\

\1

DRYER DUCTS
MU

ST ENTER AT

A45

° ANGLE

A Main Discharge Duct And a 6" X

--------------------------------------~

6"

X 8" Wye On Each Dryer.

EXHAUST AIR

O

UT

OR

9

1

U11"(4.8)an)

Side

U

11

U3l'

Y.r

(

(.et%1an

34.115

em

l

I

J

211916' (6

U2

em

I

Stack

Dryer -Installation

ct leal Co nection

C7

ml'!17UIIanl

Dimensio

[-

- - 3UT(&OIGI'I) -

ns

-j

10

Stack

cu.-

Dryer-

1

11i1.27

1

Installation

Dirrensions

7

811"1•17

~

4$1811'(

0

an)

L

r I

1

Jl"'le

Yr,.

1116

cnf]

em

•cm)mn

UIJ

II

I

Milt

.

90"

(228.6 em)

offset

collector

system

as

installed

Factory

collector

Dryer

Part#

Vent

9732-104-001

installed

system

Kit

offset

11

DESCRIPTION

The

single electronic control unit controls all coin counting, timing, temperature control

mation

for

both tumblers.

OF

CONTROL

and

displaying

of

infor-

Each digital
tumbler

The

small green light
acceptor.
start button
reflected

The

three temperature selection buttons
temperature
door

to

Temperature readout
button

display

is in use,

The

or

by

the

has

remove his load.

for

that

shows

the

flashing stops when

temperature selection button

digital

been

tumbler.

vend price

display

to

the

left

display

made. At

tor

each

shows

of

the

.

the

tumbler

the

the

end

OPERATING INSTRUCTIONS

1.

Load

clothes into

2. Deposit

be

3.

Additional
temperature selection button.

the

used and

time

Characteristics of running dryer:

the

tumbler

vend price that is

then

push

the

start button.

may

be purchased

and close the door.

shown

when

its particular tumbler is waiting

number

displays flashes to indicate that

customer

for

is

available

and

of

minutes remaining

credits

for

the

each tumbler also have indicator lights to indicate which selection

of

the

cycle,

in

the

display. Choose

is added to

the

coins to one

appropriate tumbler.

the

digital display flashes until

by

pressing the temperature that is in use along with

the

the

displayed time

tor

coins

to

be

to

be

used

on

that tumbler.

money

desired temperature

has

tumbler

At

this time

by

touching

been added
or

the

other

the

purchased

the

operator opens

the

inserted.

to

by

for

the

start button

When

the

coin

touching a

time

is

the

the

tumbler

to

or

a

of

start

Temperature selection may

Running
amount

time

may be extended

is

less

than

PROGRAMMED DATA

Adjustable parameters
tion

can

be

displayed and these registers

There

are

sixteen programming steps.

STEP

00

01
02
03

04

05
06
07
08
09
10
11
12
13
14
15
16

DESCRIPTION RANGE

Lower
Upper
Left coin

Right coin audit o to $9999

Hot temp. setting 150-190
Medium
Warm
Left
Right coin input 0-100 5 cents

Vend price 0-100
Time
Time
Time

Cool

Cool

Cool

Temperature Type display Centigrade

are

vend price, temperatures, and cool-down times.

drum

hour

drum

hour

audit

temp. setting 120-170

temp. setting

coin input 0-100

left coin
right coin 0-99:55 minutes
for

free

vend 0-99:55 minutes 5 sec.

down

time

down

time

down

time

be

changed

any

the

original

meter 0 to
meter 0 to

Hot cycle 0-10:00 minutes

Medium

Warm

vend

These

cycle 0-10:00 minutes

at

any

time with

time that

price.

are

resettable to zero.

sixteen steps are: (all temperatures

0

11

0-99:55 minutes 5 sec. 3.20

0-1

time

9999

hr.

9999

hr.

to

$9999 0

0-150

0:00 minutes

or

the

dryer running.

is showing on

PROGRAMMING ORIGINAL

INCREMENTS SETTINGS

Fahrenheit

the

display

Hours

even

if the added

run and money count informa-

are

degrees Fahrenheit).

5
5
5
5 cents .

5 cents 25

5 sec.

5 sec.
5 sec.
5 sec.
Cor

F F

0
0

0
175
150
125

10
25

10:00
10:00

2:00
2:00
2:00

12

Upper

Gas

Light

________

..,......

-

Varistor

Lower

Door

Light

Upper

Door

Light

Stack

Transformer

Dryer
Control
Board

REMOVEABLEJUMPERS

~·

-.........

•

Upper
Motor
Rela

Lower
Motor

·-

·---

•

o-

--

--

_

Main

Power

Lower

-

Upper

Lower

T

eft'4le111ure

Connection

Gas

L~ht

Motor

Motor

Sensor

Connectit

Light

Light

Display

Board

Output

Board

to

.

Connection

_ _

D

~-----

Coin

SW~ch

PrograniT

Connection

est

C)tle

Butt

13

or

DEXTER CONTROL FEATURES

-Activation

Procedures

Remove

activate Anti-Wrinkle

Remove

activate
Temperature Used
feature

jumper

jumper

Last

to

to

14

Section 3

Wiring Schematics

Dryer Idle--No Coins Added

Top

Dryer Used For This Example

120VAC is supplied to the Electronic Control (computer board)
time there is
goes to
Board
blue wire provides a 120VAC signal
computer board

one

on

power

side

two

blue wires.

to the dryer that

of

the

door

One

should

be

illuminated when the

the

Computer

switch

on

a black wire. Closing the loading

blue wire makes 120VAC available

to

the

Computer Board telling it

Board will

door

is closed.

by

be

powered

Coins Added--Motor Starting and Running

Top

Dryer Used For This Example

As

each coin is added the Coin Switch closes and completes a circuit

Board counts these signals and
Motor

Run Relay. With this Relay closed, 120VAC is supplied

the

computer board should be illuminated anytime the computer calls
Switch is drawn in the start position. In this position the incoming
winding and through the
speed,
Start
wire.
board

the

switch opens the circuit
Winding
The

should be illuminated

out

of

heat circuit in the

Start

the circuit and provides

when

Capacitor

dryer

can

anytime

the

cor

rect

number

to

the Auxiliary Winding (start winding). As the Motor comes up

to

the

Start Winding

power

not operate if the

the

computer calls for the heat.

and

to the

motor

of

coins

Gas

to

closes

Relay

is

not

L 1

on

the black wire. This tells

and the display lighted. 120VAC also

door

sends 120VAC to the

to

one

side

of

the Motor Run Relay.

that

the

door

is closed.

to

the Computer Board.

are

counted the Computer Board closes the

the

Motor

on the red wire. The motor light on

for

the motor to operate.

power

is supplied directly

the

circuit

to

the Gas Relay. This kicks the

on

the blue wire that connects to a bl

running. The gas light

on

us

The

door

The

The

to

the main run

the computer

that

any

Computer

The

other

light

on

Computer

Motor

Start

to

ack

the

Heat Circuit

T

op

Dryer Used For This Example

With

the

Drive Motor running, 120VAC is provided

wire

has

an in-line connector and changes to a gray wire before it arrives
computer board
Gas

Relay Contact providing 120VAC
Thermostat is
problems such
the normally open
and

has the correct
Transformer
down

to 24VAC. There is a 1.5
Spark Ignition Module (Ignition Controller) by the Control Transformer
will

then send high voltage to the

spark

plug wire).
Valve.

When

will only

must

spark

be opened

should be illuminated anytime

on

the orange/black wire

normally closed. (It wi

as

an

exhaust restriction) 120VAC goes through the normally closed High Limit Thermostat

Air

Switch (Sail Switch) on the brown wire.

air

flow. With

on

the gray wire that connects to the black wire

The

Spark

Ignition Module also sends 24VAC to the

ignition occurs

for

10 seconds

for

1 0 seconds.

the

II

open, turning off the heat circuit, if the dryer can't move enough

the

dryer running and the Air Switch closed, 120VAC is supplied to the Control

amp

in-line fuse that protects

Spark

Electrode via the High Voltage Lead (this lead looks like an automotive

high

voltage sparking stops. If ignition does not occur, the

and

then

it locks out. To reset the Spark Ignition Module the dryer loading

to

the

Gas

the

computer calls

Relay

for

to

the

This

switch is closed only if the dryer is running

at

the transformer.

the

Control Transformer.

on

the blue wire from the motor. This blue

at

the Gas Relay.

the

heat.

The

Computer Board closes the

High Limit Thermostat.

This

on

the red wire. The Spark Ignition Module

Gas

Valve Coils which open the

The

gas light

The

High Limit

air

transformer steps 120VAC

24

volts is supplied

Gas

Spark

Ignition Module

on

the

from

to

to

door

the

17