Blakeslee D-8 Service Manual

OWNER'S MANUAL

BLAKESLEE

Crockford Boulevard

BLAKESLEE

D-8/DD-8

HIGH TEMP

DISHWASHER

1844 South Laramie Avenue

Chicago, IL 60804

Phone: [phone]

66

Scarborough Ontario, Canada M1R 3C3

Phone: [phone]

Listed below are items NOT covered under warranty.

1. Lighting of Gas Pilots.
At the time of installation the gas pilots and burners should be adjusted. Continued failures of pilot lights would indicate dirty gas lines, improper

original adjustment or intermittent drafts blowing out the flame.

2. Replacing Fuses or Resetting Overloads.
Replacing a blown fuse or resetting an open overload breaker is a very simple procedure and is the owner's responsibility. If the machine

continues to blow fuses or open the overload breaker, contact you nearest authorized Blakeslee Service Center.

3. Adjusting Tank Heats.
Heat adjustments are covered in this Manual and must be adjusted depending upon desired results.

4. Proper Loading of Dishes.
It is important the machine owner's personnel observe the instructions outlined in paragraph 2-2.

5. Cleaning Drain Valves.
Foreign articles lodged in the drain valve seat should be removed as a part of normal daily cleaning.

6. Cleaning Rinse or Wash Nozzles and Line Strainers.
Keeping a dishwasher clean and removing obstructions from the nozzles and line strainers will be a periodic function of the machine owner's

personnel. The cleaning periods will vary depending upon impurities in the water supply and cleanliness of the washing operation.

7. Final Rinse Water. (High Temperature Dishwashers Only)
Most frequent of all complaints in any dishwashing machine is that of poor final rinse. It is the responsibility of the owner to provide 180° to 195°

(plus) water at 15-25 Ib. flow pressure through clean unobstructed water lines. If the machine has a factory equipped final rinse water booster,
the owner must supply the booster with a minimum of 140° temperature water.

8. Electric Boosters and Garbage Disposals.
Although these units may have been purchased with the machine, they are warranted by the individual manufacturer. Consult the nearest factory

authorized representative for these particular items.

9. Overtime Charges.
All warranty work is performed during normal daytime working hours (8 AM — 4:30 PM Monday through Friday). If warranty is requested at other

times, the owner will be required to pay the overtime premium for all labor charges.

10. Chemical Dispenser. (Low Temperature Dishwashers Only)
Replacement and lubrication of the blue hose used in the chlorine dispenser pump is a simple procedure and the owner's responsibility. Refer to

Owners Manual for further instructions.

Blakeslee

Service Department

TABLE OF CONTENTS

SECTION 1

1-1 General Description 1

SECTION 2 INSTALLATION

2-1 Plumbing and Electrical Connections 3
2-2 Location 3
2-3 Dish Table 3
2-4 Electrical Connections 3
2-5 Pump Rotation 3
2-6 Fill Rinse 4
2-7 Drains 5
2-8 Heating Systems 5
2-9 Electric Heater 5
2-10 Gas Heater 5
2-11 Steam Injection Heater 9
2-12 Steam Coil Heater 9
2-13 Electrical Detergent & Rinse Injector Connections 9

SECTION 3 OPERATION

3-1 Preparing Dishwasher for Operation 11
3-2 Auto Tank Fill 11
3-3 Timed Tank Fill 12
3-3A Tank Selection (DD-8 only) 12
3-4 Soiled Dish Table Operation 12
3-5. Loading Machines 13
3-6 Operating the Dishwasher 13
3-7 Shut down and Cleaning 14

SECTION 4 MAINTENANCE AND LUBRICATION

DESCRIPTION

4-1 Motor 15
4-2 Pump 15
4-3 Doors 15
4-4 Wash Arms 15
4-5 Final Rinse Arm and Nozzles 15
4-6 Pump Motor Overload Protection 15
4-7 Troubleshooting 15

SECTION 5 OPTIONAL EQUIPMENT

5-1 General 19
5-2 Hot Water Boosters 19
5-17 Machine Mounted Booster 23
5-20 Automatic Tank Fill 24
5-21 Timed Fill 24
5-22 Door Safety Lock 24
5-23 Tank Selection (DD8 only) 24

SECTION 6 ILLUSTRATED PARTS LIST

See Separate Table of Contents List 25

1-1. GENERAL DESCRIPTION

Figure

1-2.

Door Safety Switch

The machine door is counterbalanced and opens to provide easy
access to the inside of the machine.

SECTION 1

DESCRIPTION

1-3. MOTOR

Machine is equipped with a 1 HP 1725 RPM motor. D8's have one,
DD8's have 2.

The machine can be easily changed from a straight thru to corner
model by the simple movement of one track rail. (See Figure 1-1).

If your machine is a single D8, and is to be used in a corner, the right
side must always be positioned against one wall (see Figure 2-5).
DD8 machines, if used in a corner, should have been ordered so that
the operating controls are placed in the control box of the tank that is
farthest from the corner. (Left tank or right tank.)

1-2. DOOR SAFETY SWITCH

All machines are equipped with a door safety switch. (See Figure 1 -

2). The machine will not operate when door is open. If the door is
accidentally opened during an automatic cycle, the machine
operation will stop. (Some models may be equipped with Optional
Door Safety Lock. See para. 5-22 for description of lock.) When the
door is closed, the operator must press the start button again to finish
the wash cycle. If the door was opened when the machine was in the
rinse cycle, the machine will automatically finish the rinse cycle when
the door is closed again.

1-4. CONTROL CIRCUIT

All machines are supplied with a 115 volt, A.C. control circuit.

1.5. VACUUM BREAKER

The fill line has a vacuum breaker installed in it to prevent any back
flow of water into the fresh water supply line. If a negative pressure
develops in the supply line, the loss of pressure permits a check
valve inside the breaker to drop, sealing the orifice while at the
same time a vent opens admitting air to the system to break the
vacuum.

1-6. HEATERS

Wash tank water is heated by electricity, steam coil, steam
injection, or gas. Electrically heated machines are available in 208,
240, 440, or 480 volts only.

Figure 1-1. Relocating Track to Convert Straight-thru to

Corner Model.

1

1.7. AUTOMATIC OR TIMED TANK FILLED

L.P. Gas

W-0-17967

Steam Coil

W-3-13129

(Optional)

All machines can be supplied with an automatic or timed
tank fill. (See para. 5-20 & 5-21 for description).

Following are the complete assemblies needed for tank heat
conversion.

Natural Gas W-0-17966

1-8. Final Rinse Boosters (Optional)

Machine can be equipped with an optional built -in electric
booster, remote mounted electric booster, or remote
mounted steam booster. These boosters are designed to
raise rinse water temperature from 140° F to 180-195°.
(Refer to para. 5-2 for description).

1-9. Heat and Voltage Field Changeover
One of the most desirable features of the D8 Dishwasher is
it can easily be field converted to different tank heats and
voltage. All of the tank heats fit on the same mounting
bracket. A ll that is necessary to convert from one type of
heat to another is to order the kit for the type of heat desired
and make the wiring changes as described below, in the
parts list pages of this manual and the wiring diagram, W-3-

17715. figure 15F -20 of Modular Dishwasher Service
Manual. (NOTE: to keep the cost of conversion as low as
possible, it will be necessary to purchase a few electrical
components such as flexible waterproof conduit, wire, etc.
locally).

Steam Injector W-3-12988
Electric W-0-95377

NOTE: Electric heat not available for 115 volt machines.

Additional conversion installation note.

When changing either to or from single to three phase electrical
power, the wash pump motor must be changed. The motor protection
fuses must also be changed. See parts description in figure 6-11 and
wiring diagram, figure 15F-20 of Modular Dishwasher Service
Manual.

When changing from 115 volts to 208, 230, 440, or 480 volts, single
or 3 phase, a transformer must be added. The motor protection fuses
must also be changed (see parts description in figure 6-11 and wiring
diagram, figure 15F-20 of Modular Dishwasher Service Manual.

2

2-1.

PLUMBING

&

ELECTRICAL CONNEC

TIONS

Figure

2-3.

Attaching Table to Tank

Figure

2-1.

Data Plate

Various plumbing connections are tagged "180° water,"
"steam," "gas," etc.
NOTE: Installation must be made by qualified workmen observing all

applicable Sanitary, Safety & Electrical Codes.

2-2. LOCATION

Place dishwasher in its proper location. (See figure 2-5 or 2-6).
Maintain 34-1/4" ±3/4" height. (See figure 2-2). Level dishwasher by
turning adjustable feet. INITIAL SETTING OF DISHWASHER MUST
BE LEVEL TO PERMIT HOOD TO OPEN AND CLOSE PROPERLY. If
one side of the door has an excessive gap after the dishwasher is
leveled, adjusting one of the front legs up or down will remedy this.
(See figure 2-3). Do not make any service connections until machine is
set and leveled and doors open and close properly.

2-3. DISH TABLE

Dish table should be lipped into the dishwasher. (See figure 2-4). Use
silicone type sealer between dish tables and dishwasher. Secure with
stainless steel (S/S) truss head screws.

2-4. ELECTRICAL CONNECTIONS

Check machine data plate before making any electrical connections.
Connections must agree with data plate (figure 2-1) on machine. A
fused disconnect switch or circuit breaker (not furnished) MUST be
installed in the electrical supply line for the dishwasher. This service
connection must meet all national and local electrical code require­ments. All connections are made at one common connection in control
box. (See figure 2-9). Control box cover is hinged. Remove the six 1/4

x 20 screws and swing cover open to the right. (See figure 2-9).

SECTION 2

INSTALLATION

NOTE: If machine has optional electrical booster, refer to section 5

for separate electrical connection information.

CAUTION: Before attempting to connect electrical service

connections, be sure incoming power is turned off.

2-5. PUMP ROTATION

The pump motor(s) must rotate in a clockwise direction (when facing
front of dishwasher). An arrow on the side of the motor(s) (see figure
2-7) indicates direction motor shaft(s) must turn for correct washing
action. This rotation is factory checked but must be rechecked before
using the machine.

3

Figure

2-4 4

NOTE: Check both motors on Double D8.

NOTE: ALWAYS DISCONNECT ALL POWER GOING TO

DISHWASHER BEFORE MAKING ANY OF THESE
CHANGES.

2-6. FILL RINSE

Final rinse water will be used to fill dishwasher. Therefore, this supply
line should have a water temperature of 180-195°F and a flow
pressure of 15 to 25 P.S.I, at the dishwasher.

NOTE: If machine is equipped with either a machine

mounted booster, or a remote mounted booster, water
supply temperature must be 140°F minimum.

If the supply pressure is below 15 P.S.I., an optional booster pump will
be required. If the supply pressure is over 25 P.S.I., a pressure
reducing valve (optional) will be required. Connect a 3/4" pipe to the
line strainer. (Figure 2-4). If the run is over 20 ft., use a larger pipe to
insure proper flow pressure.

CAUTION: Before attempting to connect electrical service

connections, be sure incoming power is turned off.

2-8. HEATING SYSTEMS - Refer to Figs. 2-6 and 2-7

For Installation Information

2-9. ELECTRIC HEATER

Machines that are electrically heated are available in 208, 240 or
440-480 volts, single or three phase only. They are pre-wired at the
factory and only one common connection is necessary. LI and L2
for single phase, L1, L2 and L3 for three phase. (See figure 2-9.)
Additional instructions are inside the control box. Be sure wire size
is adequate to carry entire amperage toad. The temperature is
controlled by the thermostat located in the control box.

2-10. GAS HEATER

Check tag attached to gas valve for type of gas (L.P. or Natural) to
be used with the equipment.

NOTE: If tag is missing, Natural or L.P. gas can be determined

by checking the gas control valve. Natural gas valve
has a pressure regulator, L.P. gas does not. (See
figure 2-10.)

Check that all fittings are tight. Connect gas supply to control valve,
conforming to all local codes.

2-7. DRAINS

Connect the tank drain(s) (figure 2-5 or 2-6) to the sewer connection
using 2" pipe (figure 2-8). Because of the hot water that is used in
dishwashers, grease traps are usually not very effective. If a grease
trap is required, it must be installed below the drain line and have a
capacity of 40 gallons per minute.

5

180°F Hot

Tank Fill and

Electric

Amps

Amps

Amps

Amps

113/60/1

230/60/1

208/60/3

230/60/3

Amps

Amps

Amps

1"

9 140°

Water

&

60 Amps

Amps

Amps

Blakeslee

6

SERVICE CONNECTION INFORMATION

Service No.
Connection

1 Water Inlet

2

15

7.5
4
3-8

1.9 Amps

2A Electric

12
13
12

5.7 Amps
3 Drain 2" NPT Male Waste to Sewer 12-1/2"
4 Gas Inlet 1/2" NPT Fem. Gas Tank Heat 10-1/4"

5 Gas Flue

Steam 6

Injector

Steam 7

Coil-In

Steam 8

Coil-Out

Fitting Function

3/4" NPT Fem.

1-1/8" Dia. Hole

1-1/8"

19-3/4" x
500 x 25 mm

3/4" NPT Fem. Steam Tank Heat 10"

3/4 "NPT Fem. Steam Tank Heat 10"

1/2" NPT Fem. Steam Tank Heat 10"

Final Rinse
1 HP Motor and

Controls

460/60/3
Tank Heater

230/60/1
208/60/3
230/60/3
460/60/3

Gas Burner Vent 16"

Dim. from

Floor

Inches

60-1/4"

25"

25"

Inlet

10 Electric

39
34
16 Amps

Tank requires 18.5 gallons of hot water to fill. Final rinse requires
maximum of 130 gals per hour of 140° hot water at 20 P.S.I. Total
steam requirement 25 Ibs. cond/hr at 20 P.S.I.

Gas burner flue not furnished on steam or electrically heated
machines. When gas heated machines are specified dimensions
marked ** are increased by 2" (50 mm).

3/4"

1-5/16"

Figure 2-5 (Continued from previous page)

Tank Fill
Booster Inlet

Built-in Booster
230/60/1
208/60/3

230/60/3
460/60/3

5-3/4"

5-3/8"

SERVICE CONNECTION INFORMATION DD8

7

MK.

NO.

SERVICE

CONNECTION

180° MIN. 1"

ELECTRIC 1-1/8" CONTROL PANEL AND 2 MOTORS 25"

30 AMPS

15AMPS

8 AMPS

7.2 AMPS

3.6 AMPS

ELECTRIC 1-1/8" 2 TANK HEATERS - TOTAL 5.0 KW 25"

24 AMPS
26 AMPS
24 AMPS

11.4 AMPS

FITT. FUNCTION

GAS INLET

GPS FLUE 19-3/4" GPS BURNER VENT 16"

(2) DRAINS 2" CONNECTS TO WASTE 12-1/2"

STEAM 3/4" TANK HEAT-INJECTOR 10"

STEAM 3/4" TANK HEAT-COIL-IN 10"

STEAM 3/4" TANK HEAT • COIL-OUT 10"

1/2" NPT

FEM.

TANKS REQUIRE 37.0 GAL'S OF HOT WATER TO FILL.
FINAL RINSE REQUIRES MAX. OF 260 GAL'S PER HOUR
OF 140° HOT WATER.

TANKS FILL INLET AND FINAL

RINSE INLET

115/60/1
230/60/1
208/60/3
230/60/3

460/60/3

230/60/1
208/60/3
230/60/3
460/60/3

GAS TANK HEAT 10-1/4"

TOTAL STEAM REQUIREMENT 50 LBS. COND./HR AT
20 P.S.I.

DIM.

FROM

FLOOR

60-1/4"

Figure 2-6. DOS Rough In Information

Figure

2-8.

Drain Installation

Figure

2-9.

Power Connections

8

Figure 2-7. Motor Rotation Checking

Natural gas valve has a pressure regulator for minor adjust

ment. L.P.

Gas pressure must be regulated by the customer's pressure
regulator.

PILOT LIGHTING PROCEDURE

1. Slightly depress control knob and turn clockwise to OFF. Wait
5 minutes for all unburned gas to vent. REMEMBER that L.P.
gas does not vent upward naturally. Therefore, if you have
been unsuccessful in lighting the pilot, within a short period of
time, the area must be exhausted with a fan, or equivalent, to
blow out L.P. gas before attempting to relight the pilot.

2. Turn the control knob to PILOT, depress it completely, and
light the pilot burner. The knob must be held down about 1
minute before the pilot burner will stay lit after releasing the
knob.

flame. BE SURE TO replace cover screw after adjustment to prevent
possible gas leakage.

GAS VENTS

Gas heated machines are furnished with flues. These do not have to
be connected to any vents. The temperature is controlled by the
thermostat located in the control box.

2-11. STEAM INJECTION HEATER

Connect incoming steam line to steam line tagged "incoming steam".
This will be the line strainer. It is recommended that a steam shut-off
valve and pressure gauge (not supplied with machine) be installed close
to the dishwasher for servicing. The tank water temperature is controlled
by the thermostat located in the control box. (See figure 2-9).

2-12. STEAM COIL HEATER

Connect incoming steam line to line tagged "steam supply." This will
be the line strainer. It is recommended that a steam shut-off valve and
pressure gauge (not supplied with machine) be installed close to the
dishwasher for servicing.

Connect condensate return line to condensate trap.
CAUTION: CONDENSATE LINE MUST RUN PARALLEL OR

DOWN FROM THE DISHWASHER. IF CONDENSATE
LINE HAS TO BE RUN VERTICAL, A CONDENSATE
PUMP MUST BE INSTALLED.

The tank water temperature is controlled by the thermostat located in
the control box. (See figure 2-9.)

3. Turn the knob to ON, and set the thermostat located in control
box for desired wash tank temperature (150-160'F).

CAUTION: DO NOT TURN GAS HEAT ON UNTIL WASH TANK

IS FILLED WITH WATER.

NOTE: Main burner is equipped with a non-adjustable orifice

(0.052 for L.P. gas and 0.078 for Natural gas.)

PILOT FLAME ADJUSTMENT

The pilot flame should envelop 3/8 to 1/2 inch of the tip of the
thermocouple (figure 2-11). Remove pilot adjustment cover screw
(figure 2-10). Turn inner adjustment screw clockwise to decrease or
counterclockwise to increase pilot

Figure 2-11. Pilot Flame Height

2-13. ELECTRICAL DETERGENT & RINSE

INJECTOR CONNECTIONS

WARNING: DISCONNECT ALL POWER BEFORE MAKING

ANY ELECTRICAL CONNECTIONS.

Connect primary leads of detergent-rinse injector transformer to F1
and F2 (top side of fuse block). (See figure 2-15. page 10.) POWER IS
AVAILABLE AT THIS POINT DURING THE WASH CYCLE.

The voltage at this point is the same as the primary (incoming)
machine voltage. Customer's incoming power line provides fuse
protection.

DO NOT connect detergent equipment to lines IT1 or IT2 or any other
source. This will defeat the fuse protection for the pump motor and
VOID the machine WARRANTY.

Connect secondary leads of detergent-injector transformer to
dispensing equipment.

A connection tap is provided for fresh water for detergent and final
rinse equipment (see figure 2-12).

9

Figure 2-12, 2-13 and 2-14 is not applicable for current production
models.

A connection tap is provided for the injection of final rinse additive
(see figure 2-12)

There is also a prepunched hole on the front of each dishwasher
tank - adjacent to the right side of the dishwasher pump motor.
This is for the detergent probe. (See figure 2-13). This hole was
put on all machines shipped after approximately 6-1-81.

Before 6-1-81 there were prepunched holes on the side of the
dishwashers for detergent probes (see figure 2-14). These holes
are covered with carbon steel caps. If these holes are not used,
replace the caps with stainless steel caps.

Connect secondary leads of detergent-injector transformer to
dispensing equipment. A detergent equipment control box knockout
for 1/2" conduit is located next to the incoming power knockout.

NOTE: It is highly recommended that a separate detergent

dispenser be used for each tank of a DD8.

Figure 2-15. Detergent Injector Hook-Up

10

3-1. PREPARING THE DISHWASHER FOR

Figure

3-1.

Standpipe Guide

OPERATION

a. Close drain (s) by turning handle of drain valve (see figure 2-8)
clockwise as far as it will go. Be sure standpipe guide is in position.
(See figure 3-1), Place scrap screens in position. (See figure 3-2). Be
sure all wash arms and lower final rinse arm(s) are in position and
spin freely. Tighten (turn clockwise) lower spindle and upper wash
rotor nut by hand.

b. Scatter the initial charge of detergent in scrap trays. Replenish as
needed unless automatic detergent dispenser has been added by
others.

c. Close the counterbalanced three way door.
d. Fill dishwasher tank with water. Flip HEAT/FILL switch item 4.

Figure 3-3 to "FILL" (down) position. Leave it in this position for 3
minutes to fill tank. Flip HEAT/FILL switch to "ON" (up) position
to turn on tank heater.

e. Observe wash tank thermometer item 6, figure 3-3. It should
register between 150)-160)F. If. after a short period of time. this

temperature is not attained adjust thermostat in control box (figure 2-

9.)

SECTION 3

OPERATION

the top of the standpipe as long as the machine is on. When the
machine is cycled, the final rinse water will bring the wash water up
to the lop of the standpipe.

NOTE: ADJUSTING THE THERMOSTAT IS A USER

FUNCTION AND IS NOT COVERED UNDER
WARRANTY.

3-2. AUTO TANK FILL-Optional

If machine is equipped with optional automatic tank fill. machine
will start filling with water automatically when machine
"HEAT/FILL" switch is flipped "ON" (up). Wait approximately 3
minutes for machine to fill. NOTE: This option will automatically
keep water to within 3 inches of

Figure 3-2. Installing Scrap Screens

Figure 3-3. Standard Front Panel and Thermometer Single

and Double D8

1. Red Power Light 5. Cycle Start Push Button

2. Amber Cycle Light Switch

3. Fuse 6. Thermometer

4. Heat On/Manual Fill and
Rinse Switch

3-3. TIMED TANK FILL (Optional)

HEAT/FILL switch, for this option, is a spring return type. To
activate Timed Tank Fill flip HEAT/FILL switch to "FILL"
position and hold for 2 seconds. Switch will return to "OFF"
position by spring action. Timer continues to fill tank.

NOTE: This lever should only be depressed at beginning of an
operation when the machine does not have any water in it. After
the machine is operating the final rinse water will keep the tank full
of water.

3-3A. TANK SELECTION (Optional on DD8 Only)

This option enables either left, right or both tanks to be
operated during each automatic or manual cycle. It
enables an operator to cycle only one tank during non
rush periods. In most cases, it also enables the machine
to operate on one tank even if the second tank is
inoperable.

3-4. SOILED DISHTABLE OPERATION

If your dishroom personnel observe these simple work rules,
your dishwashing operations will be fast and smooth, and
your dish breakage held to a minimum.

Instruct your bus boys or waitresses that leftover food must
be removed from dishes before placing them in stacks. See
figure 3-5. This will assure maintaining cleaner wash water
and reduced detergent costs.

Certain items are self-stacking, such as plates or trays. Food
soil should be removed from these items and the plates should
be placed in manageable stacks. An area on the soiled dish
table should be designated as a "build-up-area." The stacks of
dishes should be held in the build-up area and, if possible,
stacks of like items should be placed next to each other.
Racks can then be filled with like items when operator begins
washing.

Figure 3-3A. Front Panel and Thermometer

(Shown with optional tank selection switches)

DD8 Only

Some items will not readily stack, such as coffee cups,
glasses, soup bowls. These items should be placed directly
into racks so that they can be transported with a minimum of
effort. See figure 3-6. In racks these items also are not
exposed to breakage. Racks, when filled, should be placed in
the build-up area. This organized, orderly separation of
tableware is essential to dishroom efficiency and reduced
breakage. THE BETTER ORGANIZED YOUR SOILED
DISHTABLE, THE FASTER YOUR ENTIRE
OPERATION, AND THE LESS YOUR BREAKAGE
COSTS.

Silverware should be soaked in a sink or container to keep
food particles from drying. When ready for washing, the

Figure 3-5. Scrapping Dishes before Stacking

12

Figure 3-4. Hosing Inside of Tank

Figure 3-6. Build-up Area

13

silverware should be placed either in a flat rack or vertical silverware
holder and sent through the dishwasher.

NOTE: When placing silver in flat racks, do not overload the rack. You
should be able to see the bottom of the rack in many places after it is
loaded.

IMPORTANT: As much as possible, keep soil from entering
dishwashing machine. This will reduce detergent consumption and will
make the machine easier to clean.

3-5. LOADING MACHINES

All plates of the same size should be washed at the same time to
eliminate sorting dishes at the clean end of the machine. If possible, all
glasses, cups, etc. should likewise be sent through the machine at the
same time to eliminate rack sorting. The machine should be operated
as close to 100% efficiency as possible for a brief period while the
build-up area is being cleared. Dishes from the build-up area should be
quickly processed through the machine so the loading operator can
return to his normal scrapping and stacking function.

Better results can be obtained from a DD8 dishwasher if one tank is
used exclusively for china and the other tank is used for glasses and
silver.

3-6. OPERATING THE DISHWASHER
a. After filling the wash tank and adding detergent, raise the
door and slide the rack into the dishwasher. (Center of both
tanks in a DD8.)

b. Close the door (dishwasher has a safety switch figure 1 -2
that will prevent the machine from operating if the door is
open.)

c. Automatic Operation
Momentarily depress START button. Machine will automa­tically wash and rinse one rack of dishes. Automatic CYCLE

light (figure 3-3) will be on during the entire automatic cycle.
When the cycle is over, the light will turn off. If the door is
opened during the automatic cycle, the machine will stop. The
automatic cycle will have to be restarted when the door is
closed again. This feature provides a complete cycle to insure
proper cleaning of the rack of dishes or added articles.

To avoid being splashed, it is advisable to wait approximately
5 seconds before opening the door, after stopping the ma­chine.

d. Manual Operation
Wash Cycle

The only time manual wash is necessary is because of a timer
or some other electrical failure. Close the hooded door, flip
HEAT/FILL switch to "ON," depress and hold START button.
Minimum wash time is 45 seconds.

Rinse
On some rare occasion, it may be desirable to operate the
rinse cycle longer than programmed in the timer. Simply flip

the HEAT/FILL switch to "FILL." Machine will rinse as long as
the switch remains in the "FILL" position. Not applicable with
machine equipped with Timed Tank Fill (Optional). If the
machine timer has failed and the machine is being operated
manually, the ware must be rinsed for a minimum of 12
seconds after a normal wash cycle.

Figure 3-7. View of Racks with Door Raised (DD8)

3-7. SHUT DOWN and CLEANING

a. Turn off main power switch.
b. Flip HEAT/FILL switch to "OFF" position.

c. Drain machine by turning drain valve counterclockwise as far as it
will go (figure 2-8). Raise washer door.

d. Clean your dishtables and rinse in fresh water. Be sure to leave
scrap screens in machine while doing this.

e. REMOVE scrap screens, empty them, and clean with a scrub
brush in sink. Place on dishtable. DO NOT hit sides of scrap screens
on trash containers.

f. Inspect Revolving Wash Rotors for blockage of any opening and
ease of rotation. Remove and clean if required (see para. 4-4.)

g. Lift retainer on stand pipe guide (figure 3-1).

Remove standpipe and screen. Clean thoroughly in water
with wire brush.

h. Wash and clean INSIDE OF MACHINE using a hose. (See

figure 3-4.)

i. Leave DOOR open to dry interior of machine.

j. Thoroughly clean dishwashing area.

k. Clean and refill Detergent Dispenser (if machine has this
optional equipment) as instructed by your detergent supplier.

I. Replace standpipe and screen, flip stand pipe retainer lever
in place.

Additional Blakeslee Racks

W-0-16428 .............. Multipurpose Rack

W-0-16429 ................ Combination Rack

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4

4-1. MOTOR

No Lubrication required

4-2. PUMP
No Lubrication required

4-3. DOORS

No Lubrication required

4-4. WASH ARMS

a. Wash arms (upper and lower) should turn freely and
continue turning for a few seconds after being whirled by
hand.

b. If the scrap screens are not properly in place, obstructions,
such as prune seeds or bones, may clog the wash arm nozzles.
The wash arms are easily removed for cleaning.

c. To remove the lower wash arm, first lift off the rinse arm, then
unscrew the spindle bearing pin (item 8, figure 6-4). Lift off lower
wash arm.

d. The upper wash arm(s) is removed by removing the wash
rotor nut (item 12, figure 6-6).

4-5. FINAL RINSE ARM & NOZZLES

a. The rinse nozzles will need frequent cleaning if the water
contains much lime or other solids.

b. The hole in the rinse nozzle on the lower rinse arm may be
cleaned with a wire and paper clip. Push the scale or ob­struction into the rinse arm, then unscrew the end plugs and
flush out the tubes by operating the rinse. The lower rinse arm
may be lifted straight off the bearing pin and thrust washer
assembly.

c. The upper final rinse nozzles can be cleaned with a wire brush
and by inserting the end of a paper clip thru the nozzle. Then
remove the 1/2" pipe cap at the end of the final rinse line and
flush out the line (item 28, figure 6-5).

SECTION

MAINTENANCE & LUBRICATION

IMPORTANT: An open (blown) fuse must always be replaced

with the same size and type of fuse(s).
INCREASING THE FUSE SIZE OR RATING WILL
ELIMINATE THE MOTOR PROTECTION AND
VOID THE MACHINE MOTOR WARRANTY. Refer
to figure 6-11, items 1 thru 3A, for the proper fuse
size. It is suggested that spare fuses be purchased
and kept on hand. These fuses can be obtained
from your Blakeslee parts distributor or authorized
service agency. Refer to the authorized service
distributor and service agency listing booklet that
was packaged with the machine for the one in your
area.

4-7. TROUBLESHOOTING

WASH PUMP MOTOR WILL NOT START (EITHER
TANK)

1. Automatic timer defective.
Operate wash pump manually (see paragraph 3-6d). If pump will
run on manual but not automatic, this indicates a defective timer.

2. Motor overload fuses blown.

Check the three fuses for continuity (see items 1 thru

3, figure 6-11).

Check junction box above motor if not working.

NOTE: If overload fuses are blown (open) this indicates either a
defective motor or a foreign object has jammed the pump
impeller. Turn off power supply, drain tank and check and
remove any obstruction in the tank and pump intake.

MACHINE WILL NOT START

1. Main source of power off. Check power supply from customer's
fuse or circuit breaker.

2. Control fuse blown open. Check control fuse for , continuity.

3. Door safety switch not actuated or defective. Be sure door is fully
closed and rear portion of door handle has activated (closed) the
switch. (See figure 1-2).

4-6. PUMP MOTOR OVERLOAD PROTECTION

a. Wash Motor(s)

Wash Motor protection is provided by Slow-Blow type cartridge
fuses. In the event a foreign article jams the pump impeller, the
motor will draw an excessive amount of current and open (blow)
the fuse(s). After clearing the foreign article from the pump, the
fuse(s) must be replaced before the pump motor will operate.

WARNING: SEE FIGURE 6-11, ITEM 29 FOR LOCA-

TION OF FUSES.

NO TANK HEAT

1. HEAT/FILL switch not "ON" or defective. Flip the switch to "ON"

position. If red "POWER" light comes on, switch is good. Check
further.

2. Main gas valve, steam valve or electrical heating circuit breaker

not turned on. Check.

15

3. Thermostat set too low or defective. Open control box and turn
thermostat clockwise until heat comes on.

10. Dishes or silver improperly racked. Refer to para. 3-4 for
operating instructions.)

NOTE: If heat comes on, do not leave thermostat at this high setting.

Adjust to obtain 150°-160°F wash tank temperature on wash
tank thermometer (figure 2-12, page 8). If turning thermostat
clockwise does not start the heating cycle, check for the
following::

a. Defective thermostat
b. Defective Gas valve

c. Steam solenoid or heating contactor, whichever is on your

machine.
d. Dirty line strainer
e. Steam pressure too low (should be 10 Ibs. min.)

f. Defective steam trap (steam coil heated machine only)

NOTE: The heater is designed to maintain a temperature only. Door of

dishwasher should always remain closed when machine is on
but not being used.

WASH TANK WATER FOAMING

1. Wash tank water very dirty. Change wash tank water.

2. Poor pre-scrapping procedure. Scrap dishes better.

3. Excessive protein being put into dishwasher.

4. Improper detergent. Check with detergent representative.

POOR WASHING RESULTS

1. Poor scrapping procedures. Scrap dishes better.

2. Scrap screens blocked with soil. Empty screens.

3. Machine water dirty or contaminated. Change water.

4. Wash tank water temperature too low (See section 2-8)

5. Detergent dispenser empty. Fill dispenser.

11. Poor final rinse. Refer to para. 2-6.

NO FINAL RINSE

1. Line strainer dirty or sticking final rinse solenoid
valve. For proper operation, the solenoid valve must be free of
foreign material at the valve seat. A critical period for a valve is
soon after installation. Pipe compound or metal shavings from
the installation may lodge at the valve seat and prevent the
valve from completely opening or closing. A dirty line strainer
(see figure 2-4) will also allow foreign material to pass.

REMEDY

Shut off the water supply and using a wrench, unscrew the end of the
line strainer and drain. Clean and replace line strainer and cap.
Operate final rinse. If final rinse still does not operate, turn water
supply off again and unscrew bonnet of solenoid valve and clean. If
after doing the above, the final rinse continues to malfunction, call your
Blakeslee service technician.

INSUFFICIENT RINSE TEMPERATURE

Final Rinse

1. Final rinse booster turned off (remote mounted booster only).

2. Separate electrical supply to electric booster turned off.

3. Booster inoperative or booster thermostat set too low.

4. Adjust thermostat (refer to figure 2-9). Optional equipment
(see section on boosters).

5. Water temperature of building supply water to booster too low.

6. Water supply line pressure from booster to dishwasher too low
or not insulated to prevent heat loss.

7. Steam boosters only.

a. Insufficient steam supply to booster (minimum of 10

Ibs. flow pressure required).

a. Defective steam trap.

6. Pump impeller clogged. (Refer to para. 2-5 pump motor.)

7. Wash pump running backwards. (Refer to para. 2-5 for pump
rotation.)

8. Wash rotor clogged and/or not rotating. (Refer to para. 4-4
on wash rotor.)

9. Water conditioner causing spotting. Consult with detergent
representative.

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c. Condensate line not level or going down.

POOR FINAL RINSE RESULTS

1. Water supply pressure too low (must be 15-25 Ibs. flow
pressure) (See para. 2-6.)

2. DD8 supply line size too small. Flow rate for DD8 is 18 GPM.
Incoming water supply line should be 1" inside diameter.

3. Final rinse temperature too low. (See troubleshooting NO

(Febco Valve)

FINAL RINSE TEMPERATURE.

4. High time content or other foreign material in the water. High
lime content or other foreign material will cause severe
spotting. Consult your detergent representative for possible
remedies.

5. Final rinse nozzles clogged. See para. 4-5 on cleaning final
rinse nozzles.

6. Dirty wash water in dishwasher. Clean dishwasher.

DISHWASHER TANK(S) NOT HOLDING WATER

1. Drain valve(s) open or not fully closed. Turn valve(s) clockwise
until it hits a positive stop.

2. Foreign material around drain seat preventing positive sealing
of drain plug. Clean dishwasher and drain screen. (See para.
3-7).

3. Worn or damaged standpipe drain plug. Clean or replace.

DISHWASHER WILL NOT DRAIN

1. Clogged drain screen. Empty dishwasher by bailing water out
of wash tank with pan, etc. Clean screen.

2. Customer's drain line plugged or too small. Consult your local
plumber.

VACUUM BREAKER LEAKING

1. Deposits on the float will prevent operation of the vacuum
breaker. Shut off water supply and remove the threaded top cap
(4) (figure 4-1). Lift off the

Figure 4-1. Vacuum Breaker

collar (5) with the "0" ring (2), then remove the gasket
(1). Withdraw the float (3) and clean thoroughly. At
reassembly, make sure the "0" ring is not damaged and
is properly seated in its groove.

Genuine Blakeslee Repair Kits that are available for these
vacuum breakers:

W-1-12357 (Sloan Valve)
W-1 -12351
W-1-14835 (Consolidated Valve)

Please specify if your valve is manufactured by Sloan or
Febco. You will find the name on the cap.

17