GE DCB330EY How to use

gGE Consumer Service Training
TECHNICAL SERVICE GUIDE
COMMERCIAL DRYERS
PUB # 31-9041 12/99
MODEL SERIES:
DCB330EY (Electric)
DCD330EY
DCB330GY (Gas)
DCD330GY
Commerical Dryer
PERMAMENT PRESSPERMAMENT PRESS HIGH HEAHIGH HEATWITHT WITH
COOL DOWN CYCLECOOL DOWN CYCLE
LOW HEALOW HEAT
RESUME HEARESUME HEAT
1.
2.
Addcoins for extra dry time.Addcoins for extra dry time.
Ifdryer door is opened duringIfdryer door is opened during
cycle,push PRESS TO STcycle,push PRESS TO START
buttonagain to resume cycle.buttonagain to resume cycle.
SYNTHETIC KNITSSYNTHETIC KNITS
PRESS TO STPRESS TO START
OPERATINGTING
COTTONS HEATWASH

1
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
2
3-4
5
6-7
8
9
10
10
12
11
11
Dryer Controls
Timer/Accumulator
Door Switch
Control/BiasThermostat 12
13
14
15
High Limit/Thermal Limit
Belt Switch
Motor
Motor Removal
Motor Harness/Wiring
Wiring Diagrams
Troubleshooting Flowcharts
ExplodedViews/Parts List
16
16
17-18
19-21
22-41

2

3

4
To replace Countback Display PC Board:
WARNING!THE STEP DOWN CAPACITOR
ON PC BOARD IS 120VOLTS, AND POWER
MUST BE REMOVED PRIORTO SERVICING.
THETRACES ONTHE BOARD RUNNINGTO
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.
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 switch
settings. (factory setting is “45”).
4.At the same time the“88”displayisshown
the four indicator LED’s should light for 2-3
seconds.Nextthe“PressStart”LED willblink
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 board does not control any cycle
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.
COUNTDOWN DISPLAY DIAGNOSTICS

5
Rating Plate with
Model/Serial Number
Commerical Dryer
PERMAMENTPRESS
PERMAMENT PRESS
HIGHHEA
HIGH HEA
TWITH
T WITH
COOLDOWNCYCLE
COOL DOWN CYCLE
LOWHEA
LOW HEA
T
RESUMEHEA
RESUME HEA
T
1.
1.
2.
2.
Addcoins for extra dry time.
Addcoins for extra dry time.
Ifdryer door is opened during
Ifdryer door is opened during
cycle,push PRESS TO ST
cycle,push PRESS TO ST
ART
ART
buttonagain to resume cycle.
buttonagain to resume cycle.
SYNTHETICKNITS
SYNTHETIC KNITS
PRESSTOST
PRESS TO ST
ART
ART
OPERA
OPERA
TING
TING
COTTONS
COTTONS
HEA
HEA
TW
T W
ASH
ASH
36"
27"
25-1/2"
42"
¨
DRYER CABINET DIMENSIONS
CABINET DIMENSIONS

6

7
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.

8
DRYER OPERATION
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 auto-
matically controlled by the timer, in conjunction
with the thermostat, for the type of fabric selected
(automatic dry cycles).
ACCESSINGTHE DRYER COMPONENTS
Top Panel Removal
The top panel is held in place by two spring clips
locatedat the front ofthe dryerandtwotabs 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 knife
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.
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.
2 Phillips screws
Starting at the top edge, pull the front panel forward.
3guideclips align the front panel tothesides. Once
the clips are released, lift the front panel to remove.
Guide Clips
Air Duct
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 blower wheel on the blower
housing. To replace the air duct or install a replace-
ment front panel, remove the front panel, remove
the lint filter, remove the 2 Phillips screws from the
lint trap cover and remove the lint trap cover. Using
a sharp knife, cut the adhesive between the air duct
and the front panel. If reinstalling the original front
panel, use a putty knife to remove as much of the
old adhesive as possible. Apply adhesive along the
edgeoftheairductandpositionitonthefrontpanel.
Air Duct Seal
Commerical Dryer
PERMAMENTPRESS
PERMAMENT PRESS
HIGHHEA
HIGH HEA
TWITH
T WITH
COOLDOWNCYCLE
COOL DOWN CYCLE
LOWHEA
LOW HEA
T
RESUMEHEA
RESUME HEA
T
1.
1.
2.
2.
Addcoinsforextradrytime.
Add coins for extra dry time.
Ifdryerdoorisopenedduring
If dryer door is opened during
cycle,pushPRESSTOST
cycle, push PRESS TO ST
ART
ART
buttonagaintoresumecycle.
button again to resume cycle.
SYNTHETICKNITS
SYNTHETIC KNITS
PRESSTOST
PRESS TO ST
ART
ART
OPERA
OPERA
TING
TING
COTTONS
COTTONS
HEA
HEA
TW
T W
ASH
ASH

9
Apply a bead of WH60X20adhesive 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
theslots in the door and pressthegasketintoplace.
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.
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. Toreplacethe drumglide/uppersealassembly,
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
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. Remove the old seal and
glue a new seal in place. Reinstall the front and top
panels.
Rear Access Panel
The rear access panel allows access to view the
motor, centrifugal switch, idler pulley assembly, belt
and belt switch. The panel is secured to the back by
two Phillips screws.
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
hotpartofthecabinetneartheheater. If youremove
the shield for any reason, make certain to reinstall
the shield upon dryer reassembly.
Rear Access Panel
Heat Deflector Shield
Mini Manual

10
Dryer Drum Removal
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
byreachingunder the drumfromthefrontorthrough
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
drumbearingcup, pullthe
drumforwardthroughthe
cabinet opening.
Drum Shaft
The drum shaft is attached to the drum by three
Torx screws. To replace the drum 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 Vanes
All three dryer drum vanes are replaceable. Each
vane is attached to the drum by two Phillips screws.
Drum Bearing
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
thenewbearingwithlithiumgreaseandreassemble.
NOTE: If necessary, the drum shaft and bearing are
availableasa kit under the part#WE25X10001. The
kit contains the drum shaft, shaft bearing, mounting
brackets,asteelball,screwsandatubeofLubriplate,
a high quality lithium grease.

11
Temperature Selector Switch
The temperature selector switch, allows the
customer to select different temperature settings for
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 for continuity. With
the switch set on
“Regular”setting,there
should be continuity
onlybetweenterminals
1 and 2. On the
“Medium”setting,there
should be continuity
onlybetweenterminals
3 and 4. On a “Fluff”
setting,thereshouldbenocontinuity betweeneither
set of terminals.
Dryer Controls
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(showninillustrationbelow). Grasp the trim
atthe top and pullforward. Three tabs at the bottom
fit into slots on the top panel.
Timer
Thetimerisanelectromechanicalcontrolwitha 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/
accumulatorassemblyconsistofa mountingbracket,
timing motor, snap switch, timing cam, drive (timing
cams) coilspring(pawl),torsionspring(rachetasm),
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 parts catalog
pages for timer section for full address.
Commerical Dryer
PERMAMENT PRESS
PERMAMENT PRESS
HIGH HEA
HIGH HEA
T WITH
T WITH
COOL DOWN CYCLE
COOL DOWN CYCLE
LOW HEA
LOW HEA
T
RESUME HEA
RESUME HEA
T
1.
1.
2.
2.
Addcoins for extra dry time.
Add coins for extra dry time.
If dryer door is opened during
If dryer door is opened during
cycle, push PRESS TO ST
cycle, push PRESS TO ST
ART
ART
button again to resume cycle.
button again to resume cycle.
SYNTHETIC KNITS
SYNTHETIC KNITS
PRESS TO ST
PRESS TO ST
ART
ART
OPERA
OPERA
TING
TING
COTTONS
COTTONS
HEA
HEA
T W
T W
ASH
ASH
Mounting
Bracket
Timing Motor
Enclosed Snap
Switch
Coil Spring
(pawl)
Torsion Spring
(Ratchet Asm)
Drive
(Timing Cams)
Timing Cam
Coil
Spring
(Index-
Lever)
Greenwald Industries, Inc.
1340 Metropolitan AVe.,
Brooklyn, N.Y 11237
Phone [phone]
Timer/Accumulator

12
Door Switch
The door switch is a normally open switch wired in
series with the drivemotor. When the door is closed
andthemotorrunning,acircuitiscompletedthrough
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.
Whenthedoorisopen,theswitch should read open.
To replace the switch, squeeze the retaining clips
together and pull the switch from the front of the
dryer.
ControlThermostat and Bias Heater
The control thermostat regulates the temperature
insidethedryerdrum. It isasinglepole,singlethrow
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
thermostatalsocontainsabiasheater. The purpose
of the bias heater is to apply a small amount of heat
to the control thermostat when the fabric selector
switchissettothemedium temperaturesetting. This
smallamountofheatcausesthethermostattoopen
sooner to maintain a lower drum temperature.
THERMOSTAT
TERMINALS
BIAS HEATER
TERMINALS
NOTE:
The control thermostats are not interchangeable
betweenanelectric and a gas dryer. Theresistance
of the bias heater is 28K ohms on the electric dryer
and 7K ohms on the gas dryer.
Todiagnosethetimer/accumulator, usethe barchart
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 vertically 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 example of a
gas dryer above, the contacts are made most of the
cycle.
Timer/Accumulator Bar Chart
Schematic Detail ofTimer/Accumulator

13
To check the control thermostat, remove the wiring
from the terminals. At room temperature, the
thermostat should have continuity between the
control thermostat terminals. To check the bias
heater, remove the wiring from the bias heater
terminals. Check the resistance between the bias
heaterterminals. Onanelectricdryer,theresistance
shouldbe28Kohms. Onagasdryer,theresistance
should be 7K ohms.
To check for correct dryer temperatures, make
certain all panels are in place on the dryer and
removetheexhaust ventingfrom therearofthedryer.
Place a thermometer capable of reading at least
300°F in the end of the dryer duct. Set the timer
and allow the dryer to operate for 10 minutes with
anemptydrum. Checkthetemperature immediately
after the thermostat has cycled off and the dryer
has reached its highest temperature. Depending
upon the cycle selected, the temperatures should
be between 165°F-195°F on a “High” setting and
between 150°F-180°F for a “Medium”setting. If the
complaintislongdryingtimes and the temperatures
are correct, check for a restricted vent, too long a
vent run, or an excessive number of turns in the vent.
High Limit (Safety)Thermostat
The high limit (safety) thermostat is a single pole,
single throw switch wired in series with the control
thermostat. It is mounted towards the top of the
heater pan shield at the rear of the drum. If the
control thermostat should fail closed or an air
blockage occurs, raising the temperature in the
heaterpan,thehigh limitthermostatopensthe circuit
to the heat source.
Thermal Limiter
The thermal limiter is wired in series with the drive
motor on all electric dryers. The purpose of the
thermal limiter is to shut down the dryer should the
control thermostat and the high limit thermostat fail
to open. Once the thermal limiter has opened, it
must be replaced. In addition, the condition that
causedittoopenmustbecorrected. Themostlikely
cause would be a restriction in the dryer vent, an
excessivelylongvent or a ventwithexcessiveturns.
This is especially true if vinyl or plastic venting was
used.
Heat System (Electric Dryers)
The heater assembly is located behind the dryer
drum. Holes in the back of the drum allow heated
air to be drawn into the drum. The heating element
is an open coil heater, attached to a metal shroud
THERMAL
LIMITER
HIGH LIMIT
SAFETY
THERMOSTAT
HEATER
TERMINALS
HIGH LIMIT
SAFETY
THERMOSTAT

14
by removing the drum and visually inspecting the
element for breaks. Remove the leads from the
heater terminals and check for 12 ohms across the
terminals, then check each terminal to ground. If
theelementisopen or grounded,replacetheheating
assembly. To replace the heater assembly, remove
the four Phillips screws holding the assembly to the
cabinet back. Transfer the high limit (safety)
thermostat from the old heater shroud to the new
shroud and install the new assembly.
Heat System (Gas models)
The heating system for a gas dryer is comprised of
threemaincomponents, theignitor,theflamesensor
switch, and the gas control valve.
The ignitor is a silicon carbide thermistor mounted
atananglewiththetipextendingintotheflamearea.
Depending on room temperature, the resistance of
the ignitor should be between 50 to 400 ohms. The
ignitor is fragile and susceptible to contamination
fromskinoils. Useonlytheignitor’sinsulatedsupport
when handling to prevent damage. Electrically, the
ignitorisinparallelwiththeboostercoil. Theparallel
circuit of the ignitor and booster coil is in series with
the secondary coil on the gas valve. The series –
parallel circuit of the ignitor, booster coil, and
secondary coil is in turn in parallel with the holding
coil on the gas valve. Note: During the auto dry
cycle, you will be able to read some voltage at the
ignitor whenever the dryer is operating.
The flame sensor switch mounts on the side of the
burner duct and is single pole, single throw switch.
When the ignitor reaches approximately 1800°, the
flame sensor switch detects this high radiant heat
and opens. This energizes the secondary solenoid
gas valve coil, allowing gas to flow through the gas
valve. Gas flowing into the burner duct is ignited by
the still hot ignitor. The flame within the burner duct
heats the air being drawn into the back of the drum.
IGNITOR
FLAME SENSOR
BURNER ASSEMBLY
GASVALVE
Belt Switch
The belt switch is a normally closed switch and is
mounted on the motor bracket next to the idler arm.
If the drive belt breaks or jumps off the idler pulley,
theidler armwill contact the belt switch, causing the
switch contacts to open, and thereby opening the
circuittothe motor. To accessthebeltswitch,remove
the access panel on the rear of the dryer. Remove
the leads from the switch and connect an ohmmeter
across the switch terminals. The ohmmeter should
read continuity when the belt is on.
Motor
The drive motor is a single speed, dual shaft, ¼ hp,
1725 rpm motor with an automatic reset overload
protector. The overload protector in an internal
component of the motor and cannot be replaced
separately. The motor shaft is threaded on one end
fortheblowerwheel,withthebeltpulleyontheother.
The pulley is not available separately and comes
pressed on the shaft of a new motor.
CENTRIFUGAL SWITCH
BELT
SWITCH

15
Themotorcontainsa centrifugal switchwhichserves
three purposes: It disengages the motor start
winding, engages the motor run winding and closes
the circuit for the heat source. When the motor is
off, the switch completes a circuit from M5 through
the motor start winding to M4. The contact M1 to
M2 is open. Immediately as the motor is started,
centrifugal force pulls the switch activating collar in
on the motor. This opens the circuit through the
start winding and completes the circuit M6 through
the run winding to M4. The contacts M1 to M2 close
to activate the heat source.
MOTOR OFF
MOTOR RUNNING
Tochecktheswitch,disconnectthe dryerfrompower
and remove the drum. If the motor starts to run and
stops when the start switch is released, place an
ohm meter across terminals M5 and M6 and
manually pull in on the collar to activate the switch.
You should read continuity. If the motor runs and
there is no heat, activate the switch and check
between M1 and M2. You should read continuity.
Motor Removal
To replace the motor, disconnect power, remove the
top and front panels, belt and dryer drum. Remove
the fan cover by carefully removing the aluminum
FAN COVER
tape, two Phillips screws and the six clips holding
the cover in place. Note the retaining clips under
the aluminum tape at the bottom edge of the cover.
When reassembling, make certain the cover is
sealed to the housing with aluminum tape. If the
original tape cannot be reused, use aluminum tape
WD49X27 to seal the cover.
Unscrew the blower wheel in a clockwise direction
fromthemotor shaftusinga7/8”socket ontheblower
wheelandholdingthemotorshaftbythepulley. The
clockwise direction is marked on the center of the
wheel.
Once the blower wheel is unscrewed, remove the
motor mounting clip and unplug the wiring harness
from the motor.
MOTOR
MOUNTING
CLIP WIRING HARNESS
Direction
of removal
marked on
the blower
wheel
7/8”
hex nut

16
FAN
HOUSING
LOCK
Next, remove the fan housing lock from the rear of
the blower housing.
To remove the lock, insert a flat bade screwdriver
asshownbelow. Prythelock awayfromthehousing
far enough to clear the retaining tab and lift the lock
out of the channel.
(Motor remove for clarity in illustrations)
Once the lock is removed, the motor can be pulled
from the blower housing.
FAN
HOUSING
LOCK
RETAINING
TAB
MOTOR AND HARNESSWIRING

17
Ω
Ω

18

19
Adequate voltage
to dryer?
DryerWill Not Run
Electric Dryer
Service fuse,
breaker, outlet
problem
N
Y
Repair terminal
block connection.
Door switch
contacts closed?
Y
Start switch
contacts closed?
Y
Timer contacts
B & C closed?
Y
Replace door
switch
Replace start
switch
N
Belt switch
contacts closed?
Y
Connections at
terminal block
OK?
Y
Replace timer
N
N
N
Replace belt
switch
Replace motor
Open wiring
between
components.
Locate and repair
N
N
Y
Y
N
Contacts on
thermal limiter
closed?
Replace thermal
limiter and
correct failure
fault
Check motor
centrifugal switch
reading between
contacts 4 & 5:
Or
Using a properly
grounded test
cord connected to
terminals 4 & 5
does the motor
run?
Adequate voltage
to dryer?
Gas Dryer
Service fuse,
breaker, outlet
problem
N
Y
Replace door
switch
Start switch
contacts closing?
Timer contacts
B & C closed?
Y
Belt switch
contacts closed?
Y
Check motor
centrifugal switch
reading between
contacts 4 & 5:
Or
Using a properly
grounded test
cord connected to
terminals 4 & 5
does the motor
run?
Y
Replace start
switch
Replace timer
in coinbox
Replace belt
switch
N
Open wiring
between
components.
Locate and repair.
Y
Door switch
contacts closed?
Y
Replace motor
N
N
N
N
(Greenwald)