Service
Series "D"
Plastic Tub Dishwashers
Models and manufacturing
numbers in this manual
CDU300DB P1307505W
CDU220DB P1307506W
ADU7000DWW P1307507W
ADU7000DBB P1307508W
ADU7000DLL P1307509W
ADU6000DWW P1307510W
ADU6000DB P1307511 W
ADU5000DWW P1307512W
ADU5000DB P1307513W
ADU3000DB P1307514W
ADU3000DWW P1307515W
CDU300DB P1309605W
CDU220DB P1309606B
ADU7000D P1309607W
ADU7000D P1309608B
ADU7000D P1309609L
ADU6000D P1309610W
ADU6000D P1309611B
ADU5000D P1309612W
ADU5000D P1309613B
ADU3000D P1309614W
ADU3000D P1309615B
This manual is to be used by qualified appliance technicians
only. Amana does not assume any responsibility for property
damage or personal injury for improper service procedures
done by an unqualified person.
RS3300002
Revision 0
August 1997
!
Important Information
!
!
!
!
Pride and workmanship go into every product to provide our customers with quality products. It is possible,
however, that during its lifetime a product may require service. Products should be serviced only by a
qualified service technician who is familiar with the safety procedures required in the repair and who is
equipped with the proper tools, parts, testing instruments and the appropriate service manual. REVIEW ALL
SERVICE INFORMATION IN THE APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.
To avoid risk of serious injury or death, repairs should not be attempted by an unauthorized personal, dangerous
conditions (such as exposure to electrical shock) may result.
Amana will not be responsible for any injury or property damage from improper service procedures. If preforming
service on your own product, assume responsibility for any personal injury or property damage which may result.
To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this
product. For further assistance, please contact:
Important Information
Important Notices for Consumers and Servicers
WARNING
CAUTION
CONSUMER AFFAIRS DEPT. CALL (1-800-843-0304) or
AMANA If no answer call 1-319-622-5511 and ask for
AMANA, IOWA 52204 Consumer Affairs
If outside the United States contact:
AMANA
ATTN: CONSUMER AFFAIRS DEPT.
AMANA, IOWA 52204, USA
Telephone: (319) 622-5511
Facsimile: (319) 622-2180
TELEX: 4330076 AMANA
CABLE: "AMANA", AMANA, IOWA, USA
Recognize Safety Symbols, Words, and Labels
DANGER
DANGER—Immediate hazards which WILL result in severe personal injury or death.
WARNING
WARNING—Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION
CAUTION—Hazards or unsafe practices which COULD result in minor personal injury or product or property
damage.
RS3300002 Rev 0 August 1997
Contents
Important Information ................................................ 2
Product Information
Models and Features.................................................4
Model Identification ................................................... 4
Service Information ................................................... 4
Mini-Manual Location ................................................4
Features and Specifications ...................................... 5
Installation Instructions
Buit-In Installation Instructions ..................................6
Preparing Cabinet Opening ................................6
Preparing Electrical Wiring .......................................6
Preparing Hot Water Line ..........................................7
Preparing Drain Plumbing .........................................7
Installing Dishwasher ................................................ 7
Use & Care Instructions
Dishwasher-Safe Items .............................................9
Loading Dishwasher ..................................................10
Preparing Dishes ................................................10
Top Rack.............................................................10
Cup Retainer (some models)..............................10
Cup Shelf (some models) ...................................10
Bottom Rack .......................................................10
Cutlery Basket ....................................................10
Automatic Dishwasher Detergent Dispenser .............11
Changing Color Panels .............................................12
Changing Door Panel..........................................12
Changing Access Panel ...................................... 12
Before Calling for Service .........................................12
Dishwasher Operation
Basic Operation.........................................................13
User Operation ..........................................................13
Basic Components ....................................................14
Basic Functions.........................................................14
Fill with Hot Water ..............................................14
Wash Action ........................................................14
Drain ...................................................................15
Dry ......................................................................15
Inlet, Tub, and Thermostat Temperatures .................16
120° Inlet Water Capability ....................................... 16
Water Temperature Boost...................................16
Operating Instructions
CDU220 ..................................................................... 17
CDU300 ..................................................................... 18
ADU3000 ................................................................... 19
ADU5000 ................................................................... 20
ADU6000 ................................................................... 21
ADU7000 ................................................................... 22
Service Information
Water Valve and Inlet System...................................23
Disassembly .......................................................23
Water Valve Operation .......................................23
Float Switch ...............................................................24
Disassembly .......................................................24
Recalibration.......................................................24
Motor/Pump Mechanism and Boots .......................... 25
Motor/Pump Mechanism Check..........................25
Motor/Pump Removal ......................................... 25
Motor/Pump Replacement Parts.........................26
Reassembly ........................................................26
Soft Food Disposer ...................................................26
Disassembly .......................................................26
Drain Solenoid...........................................................27
Racks ........................................................................27
Rotating Upper Shower Arm .....................................27
Spray Arm .................................................................27
Filter System ............................................................. 28
Drain Action ........................................................28
Filter and Drain ...................................................28
Calrod Heater ............................................................28
Sump Cover and Baffle Grid .....................................28
Tub Corner Baffles ....................................................29
Door Gasket Replacement ........................................29
Door Components .....................................................29
Detergent Cup Cover And Latch.........................29
Rinse Agent Injector ...........................................29
Drying Vent .........................................................30
Control Panel Assembly ............................................ 30
Push Button Switches ...............................................30
Servicing Push Button Switch.............................31
Push Button Switch Test............................................31
Switch Contact Chart ................................................31
Snap On Electrical Components Cover ....................32
Timer.........................................................................32
Timer Testing ......................................................32
Latch Interlock Switches ...........................................33
Door Latch.................................................................33
Strike Adjust .......................................................33
Aluminum Trim Panel ...............................................33
Testing ................................................................33
Repair ................................................................. 33
Schematic Diagrams
ADU3000...................................................................34
ADU5000...................................................................36
ADU6000...................................................................38
ADU7000...................................................................40
CDU220..................................................................... 42
CDU300..................................................................... 44
RS3300002 Rev. 0 3 August 1997
Product Information
!
!
WARNING
Disconnect power and close water supply valve
before servicing dishwasher. Never energize
electrical power to dishwasher with any panels
removed.
Models and Features
All dishwasher models use one piece of channel steel
as the main frame around tub and the two front legs.
Rear legs are channel steel, and a steel bottom liner
stiffens and supports tub bottom. A cross brace is
used at the front for stiffness. Tub bottom brace
supports the tub when filled with hot water and
prevents deformation.
WARNING
All ground wires removed during servicing must be
reconnected to insure dishwasher is properly
grounded.
Tub is not replaceable. If defective, the entire
dishwasher must be replaced.
The models all have 120°F inlet water capability.
Some models use a water heat thermostat and cycle
extender to extend cycle time for water temperatures
under 140°F. ADU3000, ADU5000, and ADU520 units
use a timed sytem.
Model Identification
Rating label, which gives the model number, is
located on the left side of the tub at the front, and is
visible when the door is opened. This series of models
will have "P" numbers which identify the product.
Service Information
Two different pieces of service literature will be
available. The mini-manual comes with the product.
This piece contains a schematic, cam chart, and
abbreviated service information.
This service manual will contain all pertinent service
reference information including schematics.
Mini-Manual Location
The mini-manual is accessible when the access panel
is removed.
The folded mini-manual is in a 6-inch x 3 1/4-inch
envelope, which is placed between the tub and metal
plate, on the right side.
RS3300002 Rev. 0 4 August 1997
Product Information
Features and Specifications
BRAND AMANA CALORI C
MODE L ADU7 000 ADU6000 ADU500 0 ADU3000 CDU520 CDU300 CDU2 20
Colors
White
Black
Gold
Almond
Cup Shelf 2 Meta l 2 Plastic
Silverwa re Basket Super Super X X X X X
Timer
Rotary
Push Buttons
Cycles
Pots and Pans
Heavy Wash
Norma l Wash
Light Wash
China/Crystal
Short Wash
Rinse and Ho ld
Plate Warmer
Options
Delay Start
Heated Dry On
Water Heat Boost
Timer
Calrods Watts 500 500 500 500 500 500 500
Sound SofSound™ Premium Premium Standard Delux Standard
Washability
Wa sh Levels
Mid Level Wash
Rinse Aid Indicato r
Food Disposal
X
X
X
X
10
X
X
X
X
X
X
X
X
10 hours
X
X
X
3
Tower
X
X
X
X
X
X
X
7
X
X
X
X
X
X
X
6 Hours
X
X
X
3
Tower
X
X
X
X
X
X
5
X
X
X
X
X
X
X
X
3
Tower
X
X
X
X
X
X
2
X
X
X
X
X
X
X
3
Tower
X
X
X
X
X
X
X
X
X
X
6 Hours
X
X
X
3
Tower
X
X
X
2
X
X
X
X
X
X
2
Tower
X
X
X
5
X
X
X
2
Tower
August 1997 5 RS3300002 Rev. 0
Installation Instructions
Buit-In Installation Instructions
Preparing Cabinet Opening
Dishwasher is designed to fit into a minimum 34 1/2"
height and 24" width and depth. A minimum of 2" is
required between dishwasher and perpendicular
cabinet or wall. Dishwasher must not be installed more
than 10' from sink for proper drainage.
Note: Complete enclosure is not provided with
dishwasher. Installer must provide top, bottom,
back and side enclosures.
Preparing Electrical Wiring
W ARNING
To avoid electrical shock which can cause severe
personal injury or death, open household circuit
breaker to dishwasher before installing or
servicing dishwasher. After installing or servicing
dishwasher, reconnect power.
Note: Electrical wiring must meet local codes and
ordinances. If wiring does not, contact a
licensed electrician.
1. Cut 1 1/2" maximum hole in cabinet for cable or
power cord. Wiring must enter within shaded area.
2. Connecting Dishwasher
Using Cable Direct Connection
Route cable as shown. Cable must extend a
minimum of 24" from back wall of cabinet.
Using Power Cord
Install a three-prong grounded receptacle
in rear of sink cabinet next to dishwasher.
Do not install receptacle in cabinet opening.
Receptacle must be installed at least 6" but not
more than 18" from cabinet opening.
Note:
Edges of cabinet opening for power cord must be
smooth and rounded. If cabinet is metal, edges of
opening must be covered with a rubber cord protector.
Receptacle
5"
4"
Electrical Wiring
5"
Alternate
Receptacle
4"
6"
3"
RS3300002 Rev. 0 6 August 1997
Installation Instructions
Preparing Hot Water Line
Note:
• Plumbing must meet local codes and ordinances. If
plumbing does not, contact a licensed plumber.
• Hot water line must accommodate 3/8" copper
tubing or 1/2" plastic tubing. Manual shut-off in hot
water line is recommended.
1. Cut 1 1/2" hole in cabinet for hot water line. Hot
water line must enter within shaded area.
2. Flush water line to clean out debris.
5"
4"
6"
Hot
2"
5"
4"
Installing Dishwasher
W ARNING
To avoid electrical shock which can cause severe
personal injury or death, open household circuit
breaker to dishwasher before installing or
servicing dishwasher. After installing or servicing
dishwasher, restore power.
CAUTION
To avoid property damage, protect soft vinyl or
other flooring with cardboard, rugs or other
protective material during installation.
CAUTION
To avoid property damage, do not tilt dishwasher
forward.
1. Cut end of drain hose at pre-marked line as
necessary. Do not cut corrugated portion of drain
hose.
Preparing Drain Plumbing
Note:
• Plumbing must meet local codes and ordinances. If
plumbing does not, contact a licensed plumber.
• Edges of cabinet opening for drain hose must be
smooth and rounded. If cabinet is metal, edges of
opening must be covered with a rubber cord
protector.
• An air gap must be used if drain hose is connected
to house plumbing lower than 18" above floor level.
All air gap devices must be capable of passing 3/8"
steel ball to assure minimum drain line stoppages.
1"
3/4"
5/8"
August 1997 7 RS3300002 Rev. 0
Installation Instructions
2. Remove access panel by removing screws then
lifting panel up and over tabs.
Tab
3. Confirm drain hose is connected to drain hose
valve.
4. Connect hot water line to water valve using a 90°
elbow. Dishwasher water valve has a 3/8" N.P.S.
internal thread.
5. Remove slotted hex head screws from
wooden base. Lift dishwasher off wooden base.
Discard wooden base and hex head screws.
6. Loosen leveling legs.
7. Push drain hose through opening in cabinet. Route
drain hose through plastic strain relief and connect
to disposer or drain using clamp. If connecting to a
disposer, remove disposer hopper plug before
making connection.
Note: If an air gap is not code required, drain hose
must have a high drain loop, which is 18"
minimum above floor level. This prevents back
flow of water into dishwasher or water siphoning
out during operation.
8. Attach power supply to rear of dishwasher
junction box using a strain relief (not supplied).
Connect wires using wire nuts (not supplied).
Connect incoming black wire to black wire inside
junction box. Connect incoming white wire to white
wire. Connect incoming ground wire to green ground
wire.
DANGER
To avoid electrical shock which can cause severe
personal injury or death, a ground wire must be
provided by installer if house wiring is not twowire with a ground wire. Otherwise dishwasher
will not be grounded. When house wiring is
aluminum, use U.L. approved antioxidant
compound and aluminum-to-copper connectors.
9. Route power cord (if applicable) through opening in
cabinet wall.
10.Slide dishwasher into position. Any excess drain
hose must be coiled under dishwasher.
11.Check front of door for correct vertical alignment. If
dishwasher is not aligned, adjust leveling legs until
dishwasher is aligned with cabinets.
12.Confirm door closes properly and latch engages. If
door strikes cabinets or latch fails to engage, adjust
leveling legs until properly aligned.
Note: Confirm dishwasher is flush with underside of
countertop to reduce sound level.
RS3300002 Rev. 0 8 August 1997
13.Fasten dishwasher to underside of countertop
byinserting screws and tightening. Screws must be
driven straight into countertop to avoid interference
with door.
14.Replace access panel by reversing step 2.
15. Plug power cord (if applicable) into outlet.
16.Pour two quarts of water into dishwasher tub prior to
starting dishwasher for the first time. Water acts as a
lubricant and will prevent possible motor damage.
17.Run dishwasher through a complete cycle to check
for leaks.
Use & Care Instructions
Dishwasher-Safe Items
Material Usually Safe Exceptions Special Instructions
Aluminum Yes Some colored anodized aluminum
can fade.
China/Stoneware Yes Antique, metal trimmed,
hand-painted or over-the-glaze
patterns fade. Gold leaf will
discolor.
Crystal Yes Antique, metal trimmed,
hand-painted or over-the-glaze
patterns fade. Gold leaf will
discolor.
Glass Yes Milk glass may yellow.
Iron No
Non-dishware
such as filters,
etc.
Non-stick coatings Yes After washing, wipe non-stick
No Damage to dishwasher and
Some darkening or spotting
possible. Remove by scouring
with soap-filled steel wool pads.
If in doubt, check with
china/stoneware manufacturer or
test wash one piece daily for at
least a month. Compare with rest
of set.
Load securely to prevent
movement. Check crystal
manufacturer's instructions.
discoloration or staining of
dishwasher may result.
coating with vegetable oil to keep
coating from losing non-stick
quality.
Pewter No
Plastics Yes If plast ic does not say
"dishwasher - safe", test one piece
before washing entire set.
Stainless steel Yes Rinse if not washing immediately.
Salty or acid foods can stain if left
on.
Sterling silver and
silver plate
Tin No
Wood No
Yes Contact with stainless steel can
damage silver. Washing with
copper can leave a brown film.
Rinse if not washing immediately.
Salty or acid foods can stain if left
on. Powder detergent can cause
black spots. Avoid placing under
detergent dispe nse r.
August 1997 9 RS3300002 Rev. 0
Use & Care Instructions
Loading Dishwasher
Preparing Dishes
Prerinsing of normal food soils is not necessary.
Remove foods such as mustard, mayonnaise, vinegar,
lemon juice that can cause discoloration of stainless
steel.
Caution
To avoid damage to pump, remove solids such as
bones, meat trimmings, rinds, seeds, skins, or
toothpicks.
Top Rack
Top rack is for delicate, plastic or small dishware.
Glasses fit best along the sides. Arrange stemware so
that stemware cannot move easily. Do not let glasses
or stemware touch each other.
Cup Retainer (some models)
Cup retainer secures tall cups and bowls in upper rack.
Cup Shelf (some models)
Cup shelf features a fold down shelf for two levels of
smaller dishware.
Bottom Rack
Bottom rack is best for heavily soiled dishware. Fit
plates and saucers between tines. Load dishware with
soiled side facing center. Prop broiler pans and racks
along edge.
Note: Do not load large dishware in front right corner
of bottom rack. Large dishware prevents
automatic dishwasher detergent from
circulating in wash cycle.
Do not block wash tower or load tall dishware
next to wash tower. Dishware must not
prevent wash tower from rotating freely.
WARNING
To avoid personal injury or property damage, do
not place plastic dishware in dishwasher unless
marked "dishwasher-safe" or equivalent. For
plastic dishware not marked, check
manufacturer's recommendations.
Place sauce pans, mixing bowls and other dishware
face down.
Do not let dishware extend through bottom
rack. This could block wash arm and cause
poor washing results.
Cutlery Basket
Load cutlery basket evenly with dishware mixed. Small
plastic dishware such as measuring spoons and lids
are not recommended for automatic dishwashing. If
placed in dishwasher, these items should be placed in
center compartment.
WARNING
To avoid personal injury or property damage, load
sharp knives so knives do not touch door seal.
Load knives in cutlery basket with handles up.
Note: Take out anything that might fall or extend
through the bottom of basket.
RS3300002 Rev. 0 10 August 1997
Use & Care Instructions
Automatic Dishwasher Detergent
Dispenser
Use main dispenser for all wash programs except
RINSE & HOLD. Reserve dispenser is for two cycle
washes and if extra detergent is necessary.
1. Confirm cycle indicator dial is in
otherwise main dispenser will not close properly.
Add automatic dishwasher detergent.
2. Close main dispenser.
Note: Open main dispenser after dispenser has
been closed by unlatching door and rotating
cycle indicator dial to
dispenser contains automatic dishwasher
detergent, partially open door before rotating
cycle indicator dial. This reduces amount of
spillage into tub.
Automatic Dishwasher Detergent Usage Guide (Cycles vary from model to model)
OFF
position. If
OFF
position,
Reserve Dispenser
Main Dispenser
Soft Water (0-3 Grains per Gallon)
Cycle s Main Dispenser Reserve Di spenser
POTS & PANS 1 Tablespoon minimum 1 Tablespoon minimum
HEAVY, NORMAL or LIGHT WASH 1 Tablespoon minimum 1 Tablespoon minimum
SHORT WASH 1 Tablespoon minimum Optional*
Hard Water (4-10 Grains per Gallon)
Cycle s Main Dispenser Reserve Di spenser
POTS & PANS 1 1/2 Tablespoons minimum 1 Tablespoon minimum
HEAVY, NORMAL or LIGHT WASH 1 1/2 Tablespoons minimum 1 Tablespoon minimum
SHORT WASH 1 1/2 Tablespoons minimum Optional*
Extremely Hard Water
(Over 10 Grains per Gallon)
Cycle s Main Dispenser Reserve Di spenser
POTS & PANS 3 Tablespoons (Full) 2 Tablespoon (Full)
HEAVY, NORMAL or LIGHT WASH 3 Tablespoons (Full) 2 Tablespoon (Full)
SHORT WASH 3 Tablespoons (Full) Optional*
A water softener should be installed if water hardness is over 19 grains per gallon.
*Add automatic dishwasher detergent to reserve dispenser if two wash, three rinse cycle is desired.
August 1997 11 RS3300002 Rev. 0
Use & Care Instructions
Changing Color Panels
W ARNING
To avoid electrical shock which can cause severe
personal injury or death, unplug power cord or
open household circuit breaker to dishwasher
before changing panels.
Changing Door Panel
1. Remove door trim from one side of door by
removing screws.
2. Slide out door panel. Turn door panel around and
replace.
3. Replace trim by reversing step 1.
Changing Access Panel
1. Remove access panel by removing screws then
lifting panel up and over tabs.
2. Remove trim by removing screws.
3. Slide out access panel. Turn access panel around
and replace.
4. Replace trim by reversing step 2.
5. Replace access panel by reversing step 1.
Before Calling for Service
Dishwasher will not operate
• Check fuse or circuit breaker.
Automatic dishwasher detergent is left in dispenser
• Confirm dishwasher is loaded properly.
• Open dispenser and remove any hardened
automatic dishwasher detergent.
• Confirm automatic dishwasher detergent is not old
or wet.
Dishwasher makes unfamiliar sounds
• Confirm items are secure in dishwasher. Water
may be causing items to rattle.
• If dishwasher has not been used regularly, set
dishwasher to fill and pump out once every week.
This will keep seals moist.
Small amount of water is standing in tub
• This is normal and keeps water seal lubricated.
Water will not pump out of tub
• Check air gap.
• Confirm sink is draining well.
• Run disposer if dishwasher is connected to
disposal.
Screws
Suds are in tub
• Confirm detergent is for automatic dishwashers.
Remove suds by opening door and letting suds
evaporate. Add a gallon of cold water. Close and
latch door. Pump out water by turning control dial
until a drain period is reached.
• Confirm rinse aid dispenser is filled properly and
any spills are wiped up.
Dishwasher leaks
• Confirm automatic dishwasher detergent is for
automatic dishwashers.
• Confirm rinse aid dispenser is filled properly and
any spills are wiped up.
Cloudiness appears on dishware
• See spotting or filming section.
• Cloudiness may be etching. Etching cannot be
removed.
Dishware is chipped
• Confirm dishwasher is loaded properly.
Dishware is not dry
• Confirm water temperature is above 120°F.
• Confirm dishwasher is loaded properly.
• Unload bottom rack first. Water from dishes in top
rack may be spilling.
• Check level of rinse aid in dispenser.
RS3300002 Rev. 0 12 August 1997
Operation
Basic Operation
For dishes to wash properly, consumer must load
dishwasher correctly as described in Use and Care
Section of this manual, and in more detail in the Use
and Care Manual.
Spraying water must be able to reach all dishware
surfaces. Dishes or utensils must not obstruct wash arm
of telescoping wash tower.
Next, detergent must be added to dispenser and
dispenser cover must be closed. Rinse aid dispenser
(RAD)
in final rinse.
To operate dishwasher, close door and push interlock
switch lever to the right. Turn timer knob to
models with push buttons, momentarily press in on
desired wash cycle push buttons. A timed fill of about 60
seconds will begin. During fill, pump and motor will run
in recirculation mode. First two or three fills (depending
on the cycle selected) are pre-washes—plain hot water
flowing over dishware. If extra detergent cup has been
filled, it dumps when door is closed to remove most of
food residue. After each fill and pre-wash, there is a
pumpout.
tank should contain enough rinse agent for dump
Start.
For
User Operation
1. Load dishes correctly—so spray gets to all surfaces.
2. Add dishwasher detergent.
3. Add rinse agent—if desired.
4. Close and latch door.
5. Select desired wash cycle and dry mode.
6. Turn timer knob to
Push in cycle buttons for models with push buttons.
7. For
8. If
Wash cycle follows pre-washes. Wash time will vary
with cycle selection. If model includes water heat
booster, heater is on during third pre-wash and during
wash to increase water temperature and improve
washability. Detergent cup cover opens approximately
two minutes into
After final rinse, wet portion of cycle is completed and
pump and motor stop. If
selected, heater will be on during drying. If
has been selected, heater will be off.
For
provides the two
continue to run to end of what would normally be
Dry
selection should be made. Applying heat to
Hold
and produce a washability complaint.
Normal
3 Pre-washes
1 Detergent Wash
3 Rinses
cycle:
Heated Dry
If
Normal Dry
Rinse and Hold
cycle. For
dishes could bake on any remaining food particles
Rinse and Hold
ON
on timer knob models.
, timer runs to
, timer runs to
Wash
cycle. Three rinses follow wash.
Heated Dry ON
cycle, turn to
Final Rinse
cycles only. Timer will
OFF
with heater on.
OFF
with heater off.
R & H
cycle, the
has been
Normal Dry
dot on dial. This
Heated
Normal Dry
Rinse and
August 1997 13 RS3300002 Rev. 0
Operation
Basic Components
Illustration identifies the basic parts of the dishwasher.
Hot water supply connects to water valve which controls
flow through the water fill hose into side of tub.
When pump motor is energized, gate valve at the exit of
pump controls whether water is recirculated back into
tub (when drain solenoid is not energized) or out of drain
port (when drain solenoid is energized). Sump at bottom
of tub is connected to pump, so when pump motor is
energized water is either drained out or recirculated.
At entry to pump a
amounts of soft food which are pumped out of
dishwasher during drain periods. Soft food disposer
does not need to be cleaned by user.
Water recirculated into dishwasher tub goes up a hollow
tube connected to a rotating wash arm (sometimes
called spray arm) and telescoping wash tower. On some
models, a port off the pump housing channels water up
to enter the top of tub through the rotating upper shower
arm.
Calrod® sheathed heating unit is located at bottom of
tub.
Soft Food
disposer pulverizes small
Basic Functions
During normal wash cycle, dishwasher performs these
functions.
Fill with Hot Water
Enough water is necessary to enable good washing
action. Normal amount of water for a full fill is about 2.0
gallons. Some rinse fills are less.
Actual water level in dishwasher is controlled indirectly;
amount of water fill is determined by timer energizing
water valve solenoid for a specified length of time.
Water valve is designed to give a flow rate of 1.8
gallons per minute and is on for 1 minute. Fill would be
1.8 gallons under design conditions. Pump motor is
energized during the fill period.
Wash Action
Hot water is sprayed under pressure onto dishware. This
is accomplished by pumping water up a hollow tube
through tub bottom and into wash arm and three-section
telescoping wash tower fastened to wash arm.
These components rotate from 12 to 40 RPM. Wash
arm is powered by water jet at one end. Water sprayed
on dishware falls to the bottom of the tub and then goes
into sump and back to pump.
On some models there is a shower arm at top of tub. If
used, water comes out of port in pump housing through
a hose to upper shower arm. Water pressure rotates
upper shower arm at about 100 RPM.
RS3300002 Rev. 0 14 August 1997
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