BKI LGF Service Manual
Gas Pressure Fryer
MODELS LGF, LGF-F, & LGF-FC
Service Manual
Serial Numbers 109576 and higher
Warranty Information
LIMITED ONE YEAR WARRANTY
BKI (The “Company”) warrants to the original purchaser/user, that at time of shipment from the Company
factory, this equipment will be free from defect in materials and workmanship. Written notice of a claim
under this Warranty must be given within ONE YEAR AND THREE MONTHS from date of shipment from
the factory. Defective conditions caused by abnormal use or misuse, lack of maintenance, damage by
third parties, alterations by unauthorized personnel, acts of God, failure to follow installation instructions
or any other events beyond the control of the company will NOT be covered under Warranty. The
obligation of the Company under this Warranty shall be limited to repairing or replacing (at the option of
the company) any part which is defective in reasonable opinion of the Company. The user will have the
responsibility and expense of removing and returning the defective part to the Company as well as the
cost of reinstalling the replacement or repaired part.
IN NO EVENT SHALL THE COMPANY BE LIABLE FOR LOSS OF USE, LOSS OF REVENUE OR
LOSS OF PRODUCT OR PROFIT OR FOR INDIRECT OR CONSEQUENTIAL DAM AGES INCLUDING
BUT NOT LIMITED TO, FOOD SPOILAGE OR PRODUCT LOSS. WARRANTY DOES NOT COVER
GLASS BREAKAGE. THE ABOVE WARRANTY IS EXCLUSIVE AND ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, ARE EXCLUDED INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THIS WARRANTY SHALL
APPLY ONLY WITHIN THE CONTINENTAL UNITED STATES, ITS TERRITORIES, AND
POSSESSIONS AND IN CANADA.
LIMITED NINETY DAY LABOR WARRANTY
All labor necessary to repair or replace factory defective parts will be performed, without charge, to the
end user, by service personnel of a BKI Authorized Distributor during the first ninety days after the date of
installation of the new equipment.
Replacement parts: Any appliance replacement part, except lamps and fuses, which proves to be
defective in material or workmanship within 90 days from date of original installation will be repaired or
replaced without charge F.O.B. Factory, Simpsonville, S.C. or F.O.B. authorized distributor.
The purchaser must post, in a prominent location, instructions to be followed in
the event the user smells gas. This information shall be obtained by consulting
the local gas supplier.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors or liquids in the
vicinity of this or any other appliance.
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, injury or death. Read the installation, operation
and maintenance instructions thoroughly before installing or servicing
this equipment.
Gas Pressure Fryer Table of Contents
Table of Contents
Table of Contents .................................................................................................................................................... 1
Introduction.............................................................................................................................................................. 2
Safety .................................................................................................................................................................... 2
Safety Signs and Messages ............................................................................................................................. 2
Safe Work Practices ......................................................................................................................................... 3
Safety Labels .................................................................................................................................................... 8
Maintenance........................................................................................................................................................... 10
Scheduled Maintenance...................................................................................................................................... 10
Safety Pop Valve Procedure........................................................................................................................... 11
Filtering Procedure.......................................................................................................................................... 12
LGF-F and LGF-FC.................................................................................................................................... 12
LGF............................................................................................................................................................. 13
Boil-Out Procedure ......................................................................................................................................... 14
Filter Pad Replacement .................................................................................................................................. 16
Troubleshooting................................................................................................................................................... 17
Replacement Parts ................................................................................................................................................ 18
Assemblies.......................................................................................................................................................... 18
Accessories......................................................................................................................................................... 41
Components........................................................................................................................................................ 42
Wiring Diagrams.................................................................................................................................................... 43
Notes....................................................................................................................................................................... 53
1
Gas Pressure Fryer Introduction
Introduction
The LGF Pressure Fryer is compact, attractive and functional in design. It is constructed of a stainless steel fryer
pot for cleaning ease. Exclusive BKI patented features and safety devices offer flexibility, efficiency and reliability
plus PERFECTION IN PRESSURE FRYING!
The BKI name and trademark on this unit assures you of the finest in design and engineering -- that it has been
built with care and dedication -- using the best materials available. Attention to the operating instruction s
regarding proper installation, operation, and maintenance will result in long lasting dependability to insure the
highest profitable return on your investment.
PLEASE READ THIS ENTIRE MANUAL BEFORE OPERATING THE UNIT. If you have
any questions, please contact your BKI Distributor. If they are unable to answer your
questions, contact the BKI Technical Service Department, toll free: 1-800-927-6887.
Outside the U.S., call 1-864-963-3471.
Safety
Always follow recommended safety precautions listed in this manual. Below is the safety alert symbol. When you
see this symbol on your equipment, be alert to the potential for personal injury or property damage.
Safety Signs and Messages
The following Safety signs and messages are placed in this manual to provide instructions and identify specific
areas where potential hazards exist and special precautions should be taken. Know and un derstand the meaning
of these instructions, signs, and messages. Damage to the equipment, death or serious injury to you or other
persons may result if these messages are not followed.
This message indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
This message indicates a potentially hazardous situation, which, if not avoided, could
result in death or serious injury.
This message indicates a potentially hazardous situation, which, if not avoided, may
result in minor or moderate injury. It may also be used to alert against unsafe practices.
This message is used when special information, instructions or identification are required
relating to procedures, equipment, tools, capacities and other special data.
2
Gas Pressure Fryer Introduction
Safe Work Practices
Do Not Store Or Use Anything Flammable Near
The Fryer
Your pressure fryer is powered by either natural gas or LP gas. Do not
store or use gasoline or any flammable liquids or vapors near this or any
other appliance. Flammable materials will burn easily. Letting any
flammable liquid or vapor get too close to the fryer could cause an
explosion or fire. Serious injury could result. Examples of flammables that
you should not store near the fryer are gasoline, paint, thinners or
removers, gas tanks, and cleaning materials.
Use Gas Safely-- Avoid Danger
Gas can be a dangerous fuel if not handled safely.
Make sure to ventilate the fryer properly. If the fryer is not properly
ventilated, carbon monoxide can be released around the fryer.
Asphyxiation or suffocation can occur if gas is not ventilated properly.
Before using this appliance for the first time, contact your local gas supplier
for instructions about what to do if you smell gas. Post those instructions
somewhere near the fryer, so that everyone who uses or works near the
fryer knows what to do if they smell gas.
Beware of High Voltage
This equipment uses high voltage. Serious injury can occur if you or any
untrained or unauthorized person installs, services, or repairs this
equipment. Always Use an Authorized Service agent to Service Your
Equipment.
Use the Fryer On Noncombustible Floors Only
Make sure your floor is noncombustible. Do not operate your fryer on floors
that are wood, carpeted or have rubber mats. Placing your fryer on a
combustible floor could cause a fire. Serious injury could result. Examples
of noncombustible floors where you can safely place your fryer are
concrete, tile, and ceramic.
Keep The Area Around Your Fryer Uncluttered
Make sure to keep the area around your fryer clear of any obstacles.
Serious injury can occur if you trip or fall near the fryer. You could be
burned by hot shortening that splashes out of the fryer or by falling against
the hot metal of the fryer.
3
Gas Pressure Fryer Introduction
Keep The Floor Around Your Fryer Clean Of
Shortening
Make sure to keep the floor around your fryer clean of shortening and
other liquids. Serious injury can occur if you slip near your fryer. You could
be burned by hot shortening that splashes out of the fryer or by falling
against the hot metal of the fryer.
Keep The Lid Closed When The Fryer Is Not In
Use
Hot shortening can splash if someone moves the fryer or bumps into it.
Serious injury can occur if hot shortening splashes out of the fryer.
Do not lean, sit or stand on the fryer or perform any maintenance or
cleaning duties while the fryer or the shortening is hot. You could be
burned.
Keep The Casters Locked
To avoid spilling shortening, keep the casters locked. If any shortening
spills near your fryer, clean it up immediately.
Do Not Overfill The Fryer With Shortening
Hot shortening and steam may escape and burn you if you put too much
shortening in the fryer. Fill the fryer to approximately one inch below the fill
marks that are inside the fryer pot. Heat the shortening. If needed, carefully
add more shortening to bring the level to the fill marks.
Do Not Let Any Water Get Into The Fryer
Always remove excess moisture from food before placing it into the fryer
basket. Water will cause the hot shortening to spatter. You could be
burned.
Do Not Overload The Basket With Food
Hot shortening and steam may escape and burn you if you place too much
food in the basket.
4
Gas Pressure Fryer Introduction
Always Make Sure The Lid Hook Is Latched When
Closing The Fryer
To make sure the lid hook is latched properly, press down the lid until the
hook snaps shut. Hot shortening and steam can escape if the lid hook is
not latched properly. You could be burned.
Always Tighten The Spin Handle When Closing
The Fryer
Hot shortening and steam can escape if you do not tighten the spin handle
properly. You could be burned. Line up the orange knobs on the fryer lid
handle and the front hook when tightening.
Do Not Over-Tighten The Spin Handle
You could damage the fryer.
Wear Safe Clothing Appropriate To Your Job
Always wear your insulated mitts when handling the fryer basket or touch
any hot metal surfaces. You received a pair of insulated mitts with your
fryer. If you lose or damage your mitts, you can buy new ones at your local
restaurant equipment supply store or from your local BKI Distributor.
Always wear non-skid shoes when working around the fryer or any other
equipment that uses shortening. Never wear loose clothing such as
neckties or scarves while operating your fryer. Keep loose hair tied back or
in a hair net while operating your fryer.
Always wear appropriate personal protection equipment during the filtering
process to guard against possible injury from hot oil.
Always wear appropriate personal protection equipment during the boil-out
process to guard against possible injury from hot cleaning solution.
Never Loosen The Spin Handle Until The
Pressure Gauge Is At Zero
Steam may escape suddenly if you loosen the spin handle before the
gauge is at zero. If steam escapes suddenly, you could be burned.
After the pressure gauge is at zero, wait 5 seconds. Then loosen the spin
handle slowly to open the lid of the fryer. By doing this, the steam will
escape slowly and you will not be burned.
Seal The Safety Valve Properly
To seal the safety valve, lift the arm on the side of the valve. Then release
it. The valve should snap closed. Hot steam can escape from the valve
and you could be burned if you do not seal the valve properly.
5
Gas Pressure Fryer Introduction
Keep Away From The Vent
Hot steam escapes from the vent continuously when you are using your
fryer. You could be burned if you get too close to the vent.
Keep this manual with the Equipment
This manual is an important part of your equipment. Always keep it near
for easy access.
If you need to replace this manual, contact:
BKI
Technical Services Department
P.O. Box 80400
Simpsonville, S.C. 29680-0400
Or call toll free: 1-800-927-6887
Outside the U.S., call 864-963-3471
Protect Children
Keep children away from this equipment. Children may not understand that
this equipment is dangerous for them and others.
NEVER allow children to play near or operate your equipment.
Keep Safety Labels Clean and in Good Condition
Do not remove or cover any safety labels on your equipment. Keep all
safety labels clean and in good condition. Replace any damaged or
missing safety labels. Refer to the Safety Labels section for illustration and
location of safety labels on this unit.
If you need a new safety label, obtain the number of the specific label
illustrated on page 8, then contact:
BKI
Technical Services Department
P.O. Box 80400
Simpsonville, S.C. 29680-0400
Or call toll free: 1-800-927-6887
Outside the U.S., call 864-963-3471
6
Gas Pressure Fryer Introduction
Be Prepared for Emergencies
Be prepared for fires, injuries, or other emergencies.
Keep a first aid kit and a fire extinguisher near the equipment. You must
use a 40-pound Type BC fire extinguisher and keep it within 25 feet of your
equipment.
Keep emergency numbers for doctors, ambulance services, hospitals, and
the fire department near your telephone.
Know your responsibilities as an Employer
• Make certain your employees know how to operate the equipment.
• Make certain your employees are aware of the safety precautions on
the equipment and in this manual.
• Make certain that you have thoroughly trained your employees about
operating the equipment safely.
• Make certain the equipment is in proper working condition. If you make
unauthorized modifications to the equipment, you will reduce the
function and safety of the equipment.
Do Not Smoke Near The Fryer.
7
Gas Pressure Fryer Introduction
Safety Labels
8
Gas Pressure Fryer Introduction
9
Gas Pressure Fryer Maintenance
Maintenance
Failure to comply with the maintenance below could result in a serious accident.
Do not over-tighten the spindle assembly. (Only tighten to hold pressure.)
Your fryer will need periodic maintenance and servicing. We strongly suggest that you
use only a service company that is authorized by BKI to do this work.
The restraining device must always be connected when the appliance is in service.
Disconnect for movement, such as servicing or cleaning. Reconnect the re straint when
fryer has been returned to its normal position.
Scheduled Maintenance
Use the following table to help manage scheduled maintenance activities.
FREQUENCY PERFORMED BY PART ACTIVITY
Each Fry Cycle
Daily
Weekly
User Pressure Gauge Check for proper display of cooking vat
pressure. Contact authorized BKI
service agent if adjustment or
replacement is required.
User Lid Gasket Check for unusual wear such as cracks
and deformation, and pressure leaks.
Contact authorized BKI service agent if
adjustment or replacement is required.
User Dead Weight
Assembly
User Filter Pad Replace filter pad. Refer to the
User Condensation
Pan
User Filter system Filter the shortening using the
User Safety Pop Valve Check for release of pressure and
User Fryer Pot Perform the boil-out procedure in this
Clean weight and orifices daily and
check for wear.
procedure in this manual.
Remove and drain.
procedure in this manual.
proper seal. Refer to the procedure in
this manual.
manual.
Every 6 Months
Authorized BKI
Authorized BKI
Authorized BKI
Authorized BKI
service agent
service agent
service agent
service agent
Acme Screw and
Nut
Solenoid Valve Check that the valve is holding and
Hook, Catch,
Spring
Connections,
Fittings
10
Check for wear on the threads.
releasing pressure when the timer or
computer activates it.
Check for wear and ease of operation.
Check for leakage while oil is pumping.
Gas Pressure Fryer Maintenance
Safety Pop Valve Procedure
The safety pop valve should be blown under pressure periodically to prevent the seat from sticking.
Failure to use the insulated mitts will result in injury. Always use the insulated mitts when
handling the arm on the safety valve.
1. After the pressure is up during a cooking cycle, use the insulated glove to lift the arm on the edge of the
safety valve and let some steam escape. This will clean the valve.
2. Release the lever on the valve, and let it slam shut to seal the valve.
11
Gas Pressure Fryer Maintenance
Filtering Procedure
Breaded foods require frequent filtering. An excess amount of breading left in the fryer pot will reduce the life of
the shortening. We recommend the shortening be filtered after every three frying cycle loads. When the
shortening starts to show signs of foaming and has a bad taste, do not use it. The fryer pot should be cleaned
before refilling with new shortening. Best results for filtering are obtained while the sho rtenin g is hot. You should
filter at the end of every business day. You should also remove and drain the condensation pan daily.
Always wear appropriate personal protection equipment during the filtering process to
guard against possible injury from hot oil.
If the pump motor automatically shuts off while filtering, place the FILTER/OFF/FRY
switch in the OFF position, wait 15 minutes, press the pump motor reset button, then
follow the appropriate refill procedure below.
LGF-F and LGF-FC
1. Set the FILTER/OFF/FRY switch to OFF.
2. Remove the fryer basket.
3. Make certain that the filter pad is clean and not torn.
IMPORTANT: Make certain the vat cover is properly positioned underneath the drain valve. Also
make certain the filter vat and filter screen is under the main drain valve before starting the filtering
process.
4. Move the DRAIN handle slowly to the OPEN position so that the shortening starts to flow evenly. This
is to prevent excessive splashing of hot shortening.
5. When the pot is empty, place the DRAIN handle in the CLOSED position.
To refill the pot automatically, use the steps below:
Hot shortening may splash out of the pot causing severe injury when filling the pot if the
lid is not closed. To prevent shortening splashes, close the lid before filling.
• Close the lid to prevent shortening splashes.
• Place the FILL handle to the THRU POT position.
• Position the FILTER/OFF/FRY switch to FILTER and shortening will automatically pump into the
pot.
• After 1 minute carefully open the lid to check the level of the shortening.
• Let the filter continue to pump the shortening until the fill mark in the fryer pot is reached or until
air starts bubbling through the shortening.
• As soon as air is seen in the shortening, first place the FILL handle to the THRU HOSE position
then position the FILTER/OFF/FRY switch to OFF to prevent shortening degradation and prevent
the filter pump and lines from filling up with shortening.
• Add new shortening if the fill mark has not been reached.
12
Gas Pressure Fryer Maintenance
To refill the pot through the rinse hose, use the steps below:
• Make certain that the rinse hose is connected to rinse hose connector.
• Holding the hose by the handle, place hose nozzle inside the pot.
Hot shortening may splash out of the pot causing severe injury when filling the pot if the
lid is not held down over the hose nozzle. To prevent shortening splashes, hold the lid
down over the hose nozzle.
• Hold the lid down over the hose nozzle to prevent shortening splashes.
• Position the FILL lever in the THRU HOSE position.
• Position the FILTER/OFF/FRY switch to FILTER and shortening will automatically pump into the
pot.
• After 1 minute, hold the hose by the handle and carefully raise the lid to check the level of the
shortening.
• Let the filter continue to pump the shortening until the fill mark in the fryer pot is reached or until
air starts bubbling through the shortening.
• As soon as air is seen in the shortening, position the FILTER/OFF/FRY switch to OFF to prevent
shortening degradation.
• Add new shortening if the fill mark has not been reached.
LGF
1. Set the FILTER/OFF/FRY switch to OFF.
2. Remove the fryer basket.
3. Make certain that the FKF filter unit or portable filter unit filter pad is clean and not torn.
4. Position the FKF filter unit or portable filter unit under the main drain valve and make sure it’s filter
screen is in place.
5. Ensure that the FKF filter unit or portable filter unit is powered.
6. Move the DRAIN handle slowly to the OPEN position until the shortening starts to flow evenly. This
will prevent excessive splashing of hot shortening.
7. When the pot is empty, place the DRAIN handle in the CLOSED position.
To refill the pot through the drain valve, use the steps below:
• Make certain that the braided hose (located on the drain valve) is connected to it’s mating part on
the FKF filter unit or portable filter unit.
Hot shortening may splash out of the pot causing severe injury when filling the pot if the
lid is not closed. To prevent shortening splashes, close the lid before filling.
• Close the lid to prevent shortening splashes.
13
Gas Pressure Fryer Maintenance
• Position the FILTER/OFF/FRY switch to FILTER and shortening will automatically pump into the
pot.
• After 1 minute carefully open the lid to check the level of the shortening.
• Let the filter continue to pump the shortening until the fill mark in the fryer pot is reached or until
air starts bubbling through the shortening.
• As soon as air is seen in the shortening, position the FILTER/OFF/FRY switch to OFF to prevent
shortening degradation and prevent the filter pump and lines from filling up with shortening.
• Add new shortening if the fill mark has not been reached.
To refill the pot through the rinse hose, use the steps below:
• Make certain that the rinse hose is connected to it’s mating part on the FKF filter unit or portable
filter unit.
• Holding the hose by the handle, place hose nozzle inside the pot.
Hot shortening may splash out of the pot causing severe injury when filling the pot if the
lid is not held down over the hose nozzle. To prevent shortening splashes, hold the lid
down over the hose nozzle.
• Hold the lid down over the hose nozzle to prevent shortening splashes.
• Position the FILTER/OFF/FRY switch to FILTER and shortening will automatically pump into the
pot.
• After 1 minute, hold the hose by the handle and carefully raise the lid to check the level of the
shortening.
• Let the filter continue to pump the shortening until the fill mark in the fryer pot is reached or until
air starts bubbling through the shortening.
• As soon as air is seen in the shortening, position the FILTER/OFF/FRY switch to OFF to prevent
shortening degradation.
• Add new shortening if the fill mark has not been reached.
Boil-Out Procedure
Boil-outs remove microscopic particles of carbon that build up on the walls of the fryer pot. To avoid eventual
carbon build-up, off flavors, and shortening breakdown, boil-outs should be done once a week on each fry er
following these procedures.
Always wear appropriate personal protection equipment during the boil-out process to
guard against possible injury from hot cleaning solution.
1. Position the FILTER/OFF/FRY switch to OFF.
2. Drain the clean shortening into an adequate storage container. (Allow the shortening to cool to room
temperature before attempting storage.)
14
Gas Pressure Fryer Maintenance
3. CLOSE the drain and fill the fryer pot with HOT water to the shortening level fill mark. Do not overfill by
allowing the water level higher than the fill mark.
4. Add ½ cup (4 ounces) of BKI cleaner.
5. Wash down the inside of the pot and lid with the pot brush to loosen the sediment.
6. Set the temperature of the solution as follows:
• For an LGF or LGF-F – Position the FILTER/OFF/FRY switch to ON. Set the thermostat to a
temperature of 190º F.
• For an LGF-FC – Position the FILTER/OFF/FRY switch to ON. Press PROG (program), type 1733,
and press ENTER. The fryer pot will heat to a temperature of 190º F during the CLEAN cycle to allow
the CLEAN function to be performed. NOTE: The fryer pot must be below 255º F to enter the CLEAN
mode.
7. Bring the cleaning solution to a rolling boil and maintain the boil for 5 minutes.
8. Place the FILTER/OFF/FRY switch to OFF.
9. Scrub the inside of the fryer pot and inside of the lid again.
10. Before draining the cleaning solution, remove the filter bag, screen and pipe connections from the filter
vat. This must be done before draining the cleaning solution. NEVER pump water or deterge nt through
the filter system.
11. After 15 minutes, slowly open the drain valve. Drain the solution into the filter vat and discard.
12. Rinse the pot with hot water, using the pot brush to remove remaining sediment, drain and discard.
13. Close the drain and refill the fryer pot with hot water to the proper level.
14. Add approximately 4 to 6 ounces of distilled (white) vinegar to develop a neutralizing solution. Stir the
solution briefly. Leave in the pot for three to five minutes and discard. NOTE: Foaming of shortening
after boil-outs is caused by failure to follow proper neutralizing procedures.
15. Repeat steps 12 through 14 as needed to remove all traces of cleaning solution.
16. Rinse the pot again with Cool water, drain and discard.
Damage to the fryer could result if the fryer pot is not completely dry before filling with
shortening. Refill the fryer pot with shortening ONLY when it is completely dry.
17. Dry the fryer pot, lid, and filter vat COMPLETELY.
18. Close the main drain and fill with new shortening to the proper level.
15
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