GE DCB330EY, DCD330EY, DCB330GY, DCD330GY Technical Service Manual

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GE Consumer Service Training

TECHNICAL SERVICE GUIDE

COMMERCIAL DRYERS

Commerical Dryer

PERMAMENT PRESSPERMAMENT PRESS

SYNTHETIC KNITSSYNTHETIC KNITS

ASH

T W

HEA

COTTONS

T WITHT WITH

HIGH HEAHIGH HEA
COOL DOWN CYCLECOOL DOWN CYCLE

T

LOW HEALOW HEA

RESUME HEARESUME HEA

ART

PRESS TO STPRESS TO ST

TINGTING

OPERA

Add coins for extra dry time.Add coins for extra dry time.

1.
If dryer door is opened duringIf dryer door is opened during

2.

ART
cycle, push PRESS TO STcycle, push PRESS TO ST
button again to resume cycle.button again to resume cycle.

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MODEL SERIES:
DCB330EY (Electric)
DCD330EY

DCB330GY (Gas)
DCD330GY

PUB # 31-9041 12/99

Table of Contents

Model Series Features

Countdown (DCD Models)

Dimensions/Rating Plate

Installation Highlights

Top Panel/Front Panel

Lower Drum Seal

Drum Removal

Drum Shaft and Bearing
Dryer Controls

Timer/Accumulator

Door Switch

2
3-4

5
6-7

8

9
10
10

11

11

12

Control/Bias Thermostat

High Limit/Thermal Limit

Belt Switch

Motor

Motor Removal

Motor Harness/Wiring

Wiring Diagrams

Troubleshooting Flowcharts

Exploded Views/Parts List

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13
14

15
16

16

17-18
19-21

22-41

1

2

3

COUNTDOWN DISPLAY DIAGNOSTICS

To verify correct operation of Countdown
Display Board:

1. Make sure power is ON to dryer.

2. Advance coin box timer one cycle.

3. The display should read “88” for two to
three seconds, then default to the dip s witch
settings. (factory setting is “45”).

4. At the same time the “88” displa y is shown
the four indicator LED’s should light for 2-3
seconds. Next the “Press Start” LED will b link
and other indicator lights will go off. (if dryer
door is NOT open)

5. Replace the board if LED’s and Display
do not function as described in #3 and #4
above.

NOTE: The boar d does not control any cyc le
time duration of the dryer. The dryer will
function normally if there is a complete
failure of the board. It is the owners’
discretion whether or not the board should
be replaced.

To replace Countback Display PC Board:

WARNING! THE STEP DOWN CAPACITOR

ON PC BOARD IS 120 VOLTS, AND POWER
MUST BE REMOVED PRIOR TO SERVICING.
THE TRACES ON THE BOARD R UNNING TO

THE CAPACITOR ARE HOT!

1. Remove the four screws in the top of
the control panel.

2. Disconnect harness connector to PC
board.

3. Pull 6 tabs as shown in illustration, one
at a time, starting at connector end,
while applying slight upward pressure,
until all tabs are released. Remove
PCboard.

4. With PCboard cover exposed, lift up on
either end of cover and release the
four tabs, one at a time until the cover
is release and remove.

5. To reinstall, align the PC board cover,
and press carefully. The tabs are
beveled to make installation easy.

6. Align PC board, by inserting the
counter end under the tab in plastic
pcboard cover at the counter opening,
and moving towards the connector
end, carefully press into place, so that
each tab snaps into place. Reconnect
harness connector, and reinstall.
control panel and four screws.

4

PERMAMENT PRESS

HIGH HEA

T WITH
COOL DOWN CYCLE

LOW HEA

RESUME HEA

1.

2.

Add coins for extra dry time.
If dryer door is opened during
cycle, push PRESS TO ST

ART

button again to resume cycle.

SYNTHETIC KNITS

PRESS TO ST

ART

OPERA

TING

COTTONS

HEA

T W

ASH

CABINET DIMENSIONS

DRYER CABINET DIMENSIONS

42"

36"

25-1/2"

Commerical Dryer

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Rating Plate with
Model/Serial Number

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6

NOTE: When exhausting from the side or bottom, a vent kit is available as publication
#14-A018. The vent kit replaces the existing duct inside the dryer to allow a 90° elbow
to vent the dryer out the side or bottom. The kit consists of a 6 1/2” long, 4” diameter
metal duct with attached mounted bracket and instructions. A 90° elbow is not supplied
and must be provided by the installer.

7

DRYER OPERATION

PERMAMENT PRESS

HIGH HEA

T WITH

COOL DOWN CYCLE

LOW HEA

RESUME HEA

1.

2.

Add coins for extra dry time.
If dryer door is opened during
cycle, push PRESS TO ST

ART

button again to resume cycle.

SYNTHETIC KNITS

PRESS TO ST

ART

OPERA

TING

COTTONS

HEA

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ASH

The dryer drum rotates clockwise at 48 – 54 rpm
as viewed from front. On electric models, air is
drawn into the heater housing and across the
open coils of the electric heater. On gas models,
air is drawn into the combustion chamber and over
the burner flame. The air is then pulled through
the tumbling clothes, picking up moisture and lint.
Lint is filtered out as air passes from the drum,
across the filter screen and into the blower duct,
where it is discharged out the vent. The bias
control thermostat, according to the setting of the
fabric selector switch, controls the air temperature.
The length of the drying cycle is controlled by the
number of minutes selected on the timer or auto­matically controlled by the timer, in conjunction
with the thermostat, for the type of fabric selected

(automatic dry cycles).

ACCESSING THE DRYER COMPONENTS

Top Panel Removal

The top panel is held in place by two spring clips
located at the front of the dryer and two tabs located

at the back. To release the clips, use a stiff putty
knife inserted between the top and front panel at
the locations shown at right. Holding the putty knif e
in a horizontal position, push in on one spring clip to
release that edge of the top. Repeat with the other
clip, lift the top at the front and disengage it from the
tabs at the rear.

2 Phillips screws

Starting at the top edge, pull the front panel forward.
3 guide clips align the front panel to the sides. Once
the clips are released, lift the front panel to remove.

Guide Clips

Commerical Dryer

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Front Panel Removal

The remove the front panel, disconnect power and
remove the top panel. Once the top panel is off,
remove the two Phillips screws, one on each side,
located on the top inside edge of the front panel.
Disconnect the two wires from the door switch.

Air Duct

Air Duct Seal

Front Panel Air Duct

The front panel air duct is glued to the front panel.
Should the air duct need to be replaced, an air duct
seal will also be required. The foam air duct seal is
gluded to the air duct and seals between the duct
and the opening for the blo wer wheel on the blo wer
housing. To replace the air duct or install a replace­ment front panel, remove the front panel, remove
the lint filter, remove the 2 Phillips screws from the
lint trap cover and remov e the lint tr ap cov er . Using
a sharp knife, cut the adhesive between the air duct
and the front panel. If reinstalling the or iginal front
panel, use a putty knife to remove as much of the
old adhesive as possible. Apply adhesive along the

edge of the air duct and position it on the front panel.

8

Apply a bead of WH60X20 adhesive on the air duct
seal and position it on the air duct. Reinstall the lint
trap cover and filter, front and top panel.

Door Gasket

The door gasket is secured to the door panel by
tabs. To replace the gasket, pull the old gasket off
the inner door panel, align the new gasket tabs with

the slots in the door and press the gasket into place.

Door Handle

The door handle is secured to the outer door panel
by tabs. To replace the door handle, remove the
door from the front panel and remove the screws
from the sides and bottom of the door. Separate
the inner and outer door panels. Release the tabs
that secure the door handle to the front panel.

Rear Access Panel

The rear access panel allows access to view the
motor, centrifugal s witch, idler pulley assembly, belt
and belt switch. The panel is secured to the back b y
two Phillips screws.

Mini Manual

Heat Deflector Shield

Drum Glide and Upper Seal

The drum glide is glued to the top outer edge of the
door opening and is a part of the felt upper drum
seal. To replace the drum glide/upper seal assembly ,
raise the top panel, remove the two Phillips screws
on the front panel and pull the front panel towards
you. Remove the old seal assembly and glue the
new seal in place using WH60X20 adhesive.
Reinstall the front and the top panels.

Drum Glide and Upper Seal

Rear Access Panel

NOTE: Located on the rear of the dryer is a heat
deflector shield. The purpose of the shield is to
prevent someone from coming in contact with the
hot part of the cabinet near the heater. If y ou remove
the shield for any reason, make cer tain to reinstall
the shield upon dryer reassembly.

Lower Drum Seal

The lower drum seal is glued in place around the
outer lower edge of the door opening on the front
panel. To replace the lower seal, remove the top
panel and the front panel. Remo ve the old seal and
glue a new seal in place. Reinstall the front and top
panels.

9

Dryer Drum Removal

Drum Bearing

To remove the dryer drum, disconnect power and
remove the top and front panels. Next, remove the
yellow spacer/bumper attached to the top cross
brace by a Phillips screw.

Drum Spacer/Bumper

Remove the drive belt from the motor drive pulley
by reaching under the drum from the front or through
the rear access opening. Once the belt is loose , the
drum must be lifted
straight up to disengage
the drum shaft from the
drum bearing. Once the
shaft ball is above the
drum bearing cup, pull the
drum forward through the
cabinet opening.

The drum bearing mounts to the inside rear of the
dryer cabinet by means of a sheet metal bracket
secured by two 5/16” screws. To replace, remove
the two screws holding the bearing to the back of
the dryer. Note: A small steel ball is used to provide
a grounding path. Make certain the steel ball is
installed during reassembly. Thoroughly lubricate
the new bearing with lithium grease and reassemble.

Drum Shaft

The drum shaft is attached to the drum by three
Torx screws. To replace the dr um shaft, align the
mounting holes and use a piece of tape to hold the
shaft in place while installing the Torx screws from
inside the drum. Thoroughly lubricate the shaft ball
with Lubriplate or a high quality lithium grease.

Drum V anes

All three dryer drum vanes are replaceable. Each
vane is attached to the drum by two Phillips screws.

NOTE: If necessary , the drum shaft and bearing are
available as a kit under the part# WE25X10001. The
kit contains the drum shaft, shaft bearing, mounting
brackets , a steel ball, screws and a tube of Lubriplate,
a high quality lithium grease.

10

Dryer Controls

PERMAMENT PRESS

HIGH HEA

T WITH

COOL DOWN CYCLE

LOW HEA

RESUME HEA

1.

2.

Add coins for extra dry time.
If dryer door is opened during
cycle, push PRESS TO ST

ART

button again to resume cycle.

SYNTHETIC KNITS

PRESS TO ST

ART

OPERA

TING

COTTONS

HEA

T W

ASH

To access the dryer controls, disconnect power and
remove the four Phillips screws at the top of the
switch trim, remove the screws and the switch trim
adapter (shown in illustration below). Grasp the trim
at the top and pull forward. Three tabs at the bottom
fit into slots on the top panel.

Commerical Dryer

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Timer

The timer is an electromechanical control with a 115v
drive motor. On a timed cycle, the timer motor
receives 115 volts continuously for the number of
minutes selected for the cycle. The timer/
accumulator assembly consist of a mounting brac ket,
timing motor, snap s witch, timing cam, drive (timing
cams) coil spring(pawl), torsion spring (rachet asm),
amd coil spring (index lever). The timing motor is
115V-60HZ, and runs at 1/180 R.P.M. It is shipped
from the factory with a 45 minute cycle time. This
can be changed by ordering a different motor.
(specify voltage, frequency, and speed.) from
Greenwald Industries. See sample par ts catalog
pages for timer section for full address.

Timer/Accumulator

Torsion Spring
(Ratchet Asm)

Coil Spring
(pawl)

Coil
Spring
(Index­Lever)

Mounting
Bracket

Timing Motor

Temperature Selector Switch

The temperature selector switch, allows the
customer to select different temperature settings f or
drying. The switch contains a 3K ohm resistor on
the electric model and a 2.4K ohm resistor on the
gas model. On the “Medium” setting, the selector
switch activates a control thermostat bias heater,
which is in series with the resistor on the switch. To
check the switch, disconnect power, remove the
wires from the switch and check f or continuity. With
the switch set on
“Regular” setting, there
should be continuity
only between terminals
1 and 2. On the
“Medium” setting, there
should be continuity
only between terminals
3 and 4. On a “Fluff ”
setting, there should be no continuity between either
set of terminals.

Timing Cam

Greenwald Industries, Inc.
1340 Metropolitan AVe.,
Brooklyn, N.Y 11237
Phone [phone]

Drive
(Timing Cams)

Enclosed Snap
Switch

11

Schematic Detail of Timer/Accumulator

Door Switch

The door switch is a normally open switch wired in
series with the drive motor. When the door is closed
and the motor running, a circuit is completed through
the motor’s run winding. To test the switch, remove
the top panel and wires from the switch. When the
door is closed, the switch should read continuity.
When the door is open, the switch should read open.
To replace the switch, squeeze the retaining clips
together and pull the switch from the front of the
dryer.

Control Thermostat and Bias Heater

The control thermostat regulates the temperature
inside the dryer drum. It is a single pole, single throw
switch wired in series with the high limit (or safety)
thermostat and the heat source. It is mounted on
the front of the blower housing. The control
thermostat also contains a bias heater. The purpose
of the bias heater is to apply a small amount of heat
to the control thermostat when the fabric selector
switch is set to the medium temperature setting. This
small amount of heat causes the thermostat to open
sooner to maintain a lower drum temperature.

Timer/Accumulator Bar Chart

T o diagnose the timer/accumulator , use the bar chart
located on the mini manual behind the switch trim.
Rotate the timer to a point in the particular cycle
you want to check. Find the appropriate location
the timer pointer is set in the cycles across the first
column. Read ver tically down the chart from that
point. At each point you cross a shaded row, the
contacts listed at the left on the same row should
have continuity. Note the shaded areas are
proportional to the total time, so take several
continuity measurements at different points within
the cycle before determining the timer motor needs
replacement. As you can see from the e xample of a
gas dryer above, the contacts are made most of the
cycle.

THERMOSTAT
TERMINALS

BIAS HEA TER
TERMINALS

NOTE:

The control thermostats are not interchangeable
between an electric and a gas dryer. The resistance
of the bias heater is 28K ohms on the electric dryer
and 7K ohms on the gas dryer.

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