Belshaw 616B Service Manual

Open Kettle Fryer

616B & 616BT

Operator’s Manual

and

Technical Supplement

Belshaw Bros., Inc.
814 44th Street NW, Suite 103
Auburn, WA 98001 USA
Tel: [phone]
Fax: [phone]
Toll Free (US): 1-800-578-2547
E-mail: [e-mail]
www.belshaw.com

Counter Top Fryers

616B & 616BT

Operator’s Manual

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone] • Fax: [phone]

E-mail: [e-mail] • http://www.belshaw.com

If you accept the machine from the shipping
company, you are, in effect, saying that the
machine is in good condition, and you must
pay for the machine. Belshaw cannot pay for

shipping damage, because the freight company
has accepted the machine from Belshaw in good
condition, and is responsible for its safe delivery.
For your protection, inspect the machine to see
that no parts are bent, scratched, or otherwise
damaged. If any damage has occurred in
shipping, file a freight claim with the shipping
company immediately.

To unpack the fryer and transport it to the
workstation:

1. Use a fork lift to transport the shipping crate
to the work station.

2. Break down the shipping crate.

3. Remove all the packing materials from the
fryer. These include foam, tape, brown
paper, plastic, and white protective coating.

4. Position the fryer to allow sufficient space
on either end of the machine for any
equipment you plan to use with it.

IMPORTANT

Keep this manual for future reference.

EQUIPMENT RECORD

Please provide the information below when you correspond with us about your machine.
Purchased by _____________________________________________________________________
Installed by ______________________________________________________________________
Date of Installation ________________________________________________________________
Model number ___________________________________________________________________
Serial number

010808

MN-1137EN

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone] • Fax: [phone]

Email: [e-mail] • http://www.belshaw.com

Contents

Sections

1 Operation 1

Frying Tips 2

2 Cleaning 3

Cleaning the Exterior Surfaces 3
Cleaning the Frying Screen 3
Cleaning the Kettle 3

3 Donut-Making Helps 5

Tips on Making Quality Cake Donuts 5
Calculating Correct Water Temperature 6
Ratios of Plunger Sizes to Donut Weights 6
Temperature Conversion 6

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

616B & 616BT OM MN-1137EN iii

Preface

The 616B and 616BT donut fryers have been
designed and built using the finest materials and
components available. It is the result of years of
research and development. Designed into this
unit are many features which will insure more
quality in your products and reduce your
operating cost. Attention to the instructions
regarding installation, operation, and
maintenance should result in years of trouble­free service.

The operator must work safely at all times and
read this manual and follow its instructions and
warnings. A thorough understanding of how to
install, maintain, and safely operate the fryer will
prevent production delays and injuries.

Heed the following warnings and all other
warnings that appear in this manual:

• To avoid damaging the machine, never

use force to assemble, disassemble,
operate, clean, or maintain it.

• Hot shortening can cause serious burns.

Make sure that the system and the
shortening are cool before attempting
any cleaning, adjustment, disassembly,
or repair.

• To avoid electrocution or other injury,

unplug the machine before attempting
any cleaning, adjustment, disassembly,
or repair.

• Be careful never to get shortening,

water, or other materials on the floor. If
anything does get spilled on the floor,
mop it up immediately. Materials on the
floor can cause people to slip or fall,
resulting in serious injury or loss of life.

• To prevent unintentional startup and

possible fire, unplug the machine if there
is a local power outage. When the
power is restored, it is safe to plug the
machine in again.

• Never let water and hot shortening come

in contact with each other. Moisture
causes hot shortening to spatter, which
may cause serious burns.

• Do not overfill the kettle with

shortening. If shortening overflows the
kettle, it could cause serious burns or
could cause someone to slip on the floor
and be seriously injured.

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iv MN-1137EN 616B & 616BT OM

• To avoid electrocution, make sure that

all electrical cords are not frayed or
cracked and that they do not pass
through any water or shortening.

• Make sure that all electrical cords are

routed so that no one will trip over them.

1 Operation

Read each step completely before doing what it
tells you to do.

1. Put enough shortening in the kettle to
completely cover the heating elements,
thermocouple, and high-temperature limit
control probe.

Put shortening in the kettle using one of

these methods:

WARNING

Hot shortening causes severe burns.

• Melt shortening in a pan on the stove

and pour it into the kettle.

• Put solid shortening into the kettle,

packing it tightly around the heating
elements, thermocouple, and high­temperature limit control probe.

• Melt shortening in a pan on the stove

and pour it into the kettle.

• Very carefully put solid shortening into

the kettle.

WARNING

To avoid serious burns, be very careful not

to splatter hot shortening when you add

shortening to the kettle.

Because shortening expands as it increases

in temperature, put shortening in the kettle
gradually. Let the shortening in the kettle
heat up before you add more.

5. After all of the shortening has melted, set the
thermostat to the desired frying temperature.

The “Heating” pilot light will go out if the
high temperature limit control breaks the
circuit.

WARNING

Air spaces can cause the shortening to

overheat and catch on fire.

2. Turn on the unit by turning the thermostat
clockwise 1/16 turn. When the unit is turned
on, the power light located next to the
thermostat knob will be lit.

3. Set the thermostat to 250°F/121°C. The
“Heating” pilot light above the elements will
light up, indicating that the shortening has
not yet reached the selected temperature.

4. Continue adding shortening to the kettle
until it reaches the “Oil Level” marks on the
kettle. Use one of the following methods.

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616B & 616BT OM MN-1137EN 1

Note: If the high temperature limit control
does break the circuit, push the red reset
button on the back of the heater head.

6. Wait for the shortening to reach the desired
temperature.

WARNING

To avoid serious burns, when the fryer is

operating, do not touch any part of the

fryer that is in contact with hot shortening.

7. If you are frying cake or French donuts,
move the cutter into place over the fryer.
Refer to the cutter manual (Type N cutter)
for complete installation and operation
instructions.

To fry yeast-raised donuts, place donuts on

the fry screen and slowly lower the screen
into the fryer. With the donut stick, turn the
donuts over to fry the top side. Remove the
fry screen and donuts when the donuts are
completely fried by lifting up the fry screen
with the donuts on top of it. Immediately
place on or over a tray to catch dripping
shortening.

WARNING

Hot shortening will drip off the fry screens,

causing a slip hazard. To avoid serious

injury or loss of life, be very careful and

immediately clean up any drips.

WARNING

Frying Tips

1. Use a high quality hydrogenated shortening.

2. Store your supply of cooking shortening at

room temperature.

3. To prolong the life of the shortening, do not

keep shortening at high temperature if the
fryer is not being used.

4. Drain and strain shortening periodically.

Several layers of cheesecloth will do a good
job of filtering.

5. Keep the fryer and screens clean.

6. Maintain shortening at the proper level in the

fryer. Add fresh shortening to keep the level
at the “Oil Level” marks stamped on the
kettle sides.

7. Add at least 15% fresh shortening to your

kettle daily.

To avoid serious burns, be careful of hot

shortening dripping from the fry screens.

Do not touch hot shortening and

immediately clean up spills and drips.

8. Continue supplying shortening to the kettle
as required. Keep the kettle filled up to the
“Oil Level” marks on the side.

9. When you are done frying donuts, move the
thermostat knob counter-clockwise as far as
it will go.

8. Discard shortening as soon as it tends to

bubble or foam during frying.

9. At least once a day, cool a small sample of

shortening from the fryer and taste it to see if
it has picked up a foreign or rancid taste.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

2 MN-1137EN 616B & 616BT OM

2 Cleaning

For your safety, observe the following warnings
throughout the entire cleaning process.

WARNING

Thoroughly clean and dry the floor if

shortening, water, or other materials are

spilled. Materials spilled on the floor can

cause serious injury or loss of life.

WARNING

To avoid electrocuting yourself or

damaging the machine, never allow water,

steam, shortening, cleaning solution, or any

other liquid to enter the electrical box or

the heater head.

WARNING

To avoid being burned in an explosion,

never use any flammable materials for

cleaning.

Cleaning the Frying Screen

1. In a sink or a dishwasher, wash the frying
screen using warm water and mild detergent.
Do not use an abrasive cleaner or scraper.

2. Rinse the frying screen in clear water.

3. Dry the frying screen thoroughly, using a
soft cloth, before you use it again.

WARNING

Dry the frying screen thoroughly.

Moisture causes hot shortening to spatter,

which may cause serious injury.

4. Check the frying screen to make sure no
metal is flaking off of it. If the screen is
flaking, replace it immediately, so you do
not get metal particles in your product.

Cleaning the Kettle

Removing the Shortening

WARNING

Cleaning the Exterior
Surfaces

1. Clean the polished and painted surfaces of
the fryer with a soft, damp cloth. Use a non­abrasive cleaner to remove any
discoloration.

2. Polish these surfaces with a soft, dry cloth.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

616B & 616BT OM MN-1137EN 3

To avoid being burned or electrocuted,

disconnect the fryer from the power source

before cleaning it.

1. Disconnect the machine from the power

source.

2. Let the shortening cool to 100°F/38°C.

3. Carefully dip out the shortening into a

suitable container. Do not disturb the
accumulated sediment in the bottom of the
kettle.

WARNING

Do not use a plastic container. If the

shortening is not cool enough, the container

will melt, possibly causing you to be

burned, and causing shortening spill.

WARNING

Do not allow the shortening to overflow the

containers. Shortening will get on the

floor, and if the shortening is not cool

enough, you may be burned.

4. After the kettle has been drained, brush any

accumulated carbon from the heater coils.
Accumulated carbon causes corrosion and
poor heat recovery.

5. Remove the drain tray.

WARNING

Washing

1. Wash the kettle carefully with detergent to

remove all stains and burned shortening.

2. Scrub the inside of the kettle. Do not use

any abrasive cleaners or scrapers.

WARNING

To avoid being burned, be very careful as

you work with hot cleaning solution. Never

put your hands in the solution. Wear

gloves and long sleeves in case any solution

splashes.

3. Dry the kettle thoroughly with a soft cloth

before replacing in the fryer cabinet.

WARNING

Dry the kettle thoroughly. Moisture causes

hot shortening to spatter, which may cause

serious injury.

Thoroughly clean and dry the floor if

shortening is spilled. Shortening on the

floor can cause serious injury or loss of life.

6. Remove the heater head and element.

7. Lift out the kettle and pour out the remaining

shortening and accumulated sediment.

8. Flush out the kettle with hot water to remove

all sediment.

4. Make sure the kettle is properly seated in the

case.

5. Install the heater head.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

4 MN-1137EN 616B & 616BT OM

3 Donut-Making Helps

Tips on Making Quality
Cake Donuts

• Use the correct batter temperature.

In general, the correct batter temperature is

75°-80°F/24°-27°C. Check the mix
manufacturer’s instructions, as the
recommended temperature range may vary.

If the batter is too warm, the donuts will lack

volume and may “ring out” or be misshapen.
If the batter is too cold, the donuts will stay
under the shortening too long, fry too
slowly, and crack open or ball up. They
may also absorb excess shortening and lose
volume.

• Use the correct floor time.

A floor time of 10 minutes between mixing

and cutting allows the baking powder to
react with the water. This helps the donuts
attain the proper volume the proper level of
shortening penetration.

If the floor time exceeds 30 minutes, the mix

will gas off, the donuts will lose volume and
shape and will absorb too much shortening.

If the shortening is too cold, the donuts will
spread too rapidly, will form large rings, will
tend to crack open, will be too light in
appearance, and will absorb too much
shortening.

• Maintain the proper shortening level. We

recommend a distance of 1 1/4” between the
cutter and the shortening.

If the shortening is too deep, the donuts may

not turn over when they reach the turner,
causing them to cook unevenly.

If the shortening is too shallow (too far

below the cutter), the donuts may not drop
flat, may turn over while submerging and
surfacing, and may become irregular,
cracked, or rough-crusted.

• Ensure that the donuts absorb the right

amount of shortening.

Donuts should absorb 1-1/2 to 3 oz/42 to 85

g of shortening per dozen, depending on
their weight. You can achieve proper
absorption by following tips 1-3.

• If the donuts do not absorb enough

shortening, they will not keep well.

• Use the correct frying temperature.

The correct shortening temperature for

frying is 370°-380°F/188°-193°C.

If the shortening is too hot, the donuts will

fry too quickly on the outside and will lose
volume. The donuts may also become dense
inside.

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616B & 616BT OM MN-1137EN 5

If they absorb too much shortening, they

will lose volume and may become
misshapen. If this happens, follow tips 1-3,
mix the batter a little longer than usual, turn
the donuts as soon as they become golden
brown, and turn the donuts only once.

Calculating Correct Water
Temperature

The following is an example of how to calculate
the correct water temperature to use. You must

Cake Donuts Yeast-Raised Donuts

Room temperature 72 22.2 72 22.2

Dry mix temperature +70 +21.1 +70 +21.1

Total A

Desired batter temperature 75 23.9 80 26.7

x3

Total B

Total B

-Total A

Desired water temp. for cake donuts

Temperature increase during mixing (average: 30°F/17°C)

Desired water temperature for yeast-raised donuts

°F

142 43.3 142 43.3

225 71.7 240 80.1

225 71.7 240 80.1

-142

83°F

use your own room temperature, dry mix
temperature, desired batter temperature, and, if
you are making yeast-raised donuts, estimated
temperature increase during mixing.

x3 x3 x3

-43.3 -142 -43.3

Figure from above 98 36.8

°C

28.4°C

98 36.8

°F

↓

-30 -17

68°F

°C

↓

19.8°C

Ratios of Plunger Sizes to
Donut Weights

The weights given are for donuts without icings
or other toppings. They are provided for
reference only, as weights vary according to the
density of the batter.

Plunger Size Donut Weight per

Dozen

1” 5-8 oz/142-227 g
1 7/16” 10-17 oz/283-482 g
1 9/16” 14-21 oz/397-595 g

1 13/16” 19-23 oz/539-652 g

Temperature Conversion

To convert temperatures from Fahrenheit to
Celsius, subtract 32 from °F and divide the result
by 1.8. For example, 212°F-32/1.8 = 100°C.

To convert temperatures from Celsius to
Fahrenheit, multiply °C by 1.8 and add 32 to the
result. For example, (100°C x 1.8) + 32 = 212°F.

°F °C °F °C

55 12.8 340 171.1
60 15.6 345 173.9
65 18.3 350 176.7
70 21.2 355 179.4
75 23.9 360 182.2

80 26.7 365 185.0
325 162.8 370 187.8
330 165.6 375 190.6
335 168.3 380 193.3

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

6 MN-1137EN 616B & 616BT OM

Counter Top Fryers

616B & 616BT

Technical Supplement

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone] • Fax: [phone]

E-mail: [e-mail] • http://www.belshaw.com

If you accept the machine from the shipping
company, you are, in effect, saying that the
machine is in good condition, and you must
pay for the machine. Belshaw cannot pay for

shipping damage, because the freight company
has accepted the machine from Belshaw in good
condition, and is responsible for its safe delivery.
For your protection, inspect the machine to see
that no parts are bent, scratched, or otherwise
damaged. If any damage has occurred in
shipping, file a freight claim with the shipping
company immediately.

To unpack the fryer and transport it to the
workstation:

1. Use a fork lift to transport the shipping crate
to the work station.

2. Break down the shipping crate.

3. Remove all the packing materials from the
fryer. These include foam, tape, brown
paper, plastic, and white protective coating.

4. Position the fryer to allow sufficient space
on either end of the machine for any
equipment you plan to use with it.

IMPORTANT

Keep this manual for future reference.

EQUIPMENT RECORD

Please provide the information below when you correspond with us about your machine.
Purchased by _____________________________________________________________________
Installed by ______________________________________________________________________
Date of Installation ________________________________________________________________
Model number ___________________________________________________________________
Serial number

010808

MN-1138EN

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone] • Fax: [phone]

Email: [e-mail] • http://www.belshaw.com

Contents

Sections

1 Installation 1

Unpacking the Fryer 1
Initial Cleaning 1
Installing the Fryer 1
Moving the Fryer 2

2 Cleaning 3

Cleaning the Exterior Surfaces 3
Cleaning the Frying Screen 3
Cleaning the Kettle 3

3 Calibrating The Fryer 5
4 Electrical Components 6

Testing the Continuity of the Toggle Switch 6
Testing the Continuity of the Thermostat 7

5 Appendix 9

Parts List Drawing Insert Page Insert

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

616B & 616BT TS MN-1138EN iii

Preface

The 616B and 616BT donut fryers have been
designed and built using the finest materials and
components available. It is the result of years of
research and development. Designed into this
unit are many features which will insure more
quality in your products and reduce your
operating cost. Attention to the instructions
regarding installation, operation, and
maintenance should result in years of trouble­free service.

The operator must work safely at all times and
read this manual and follow its instructions and
warnings. A thorough understanding of how to
install, maintain, and safely operate the fryer will
prevent production delays and injuries.

Heed the following warnings and all other
warnings that appear in this manual:

• To avoid damaging the machine, never

use force to assemble, disassemble,
operate, clean, or maintain it.

• Hot shortening can cause serious burns.

Make sure that the system and the
shortening are cool before attempting
any cleaning, adjustment, disassembly,
or repair.

• To avoid electrocution or other injury,

unplug the machine before attempting
any cleaning, adjustment, disassembly,
or repair.

• Be careful never to get shortening,

water, or other materials on the floor. If
anything does get spilled on the floor,
mop it up immediately. Materials on the
floor can cause people to slip or fall,
resulting in serious injury or loss of life.

• To prevent unintentional startup and

possible fire, unplug the machine if there
is a local power outage. When the
power is restored, it is safe to plug the
machine in again.

• Never let water and hot shortening come

in contact with each other. Moisture
causes hot shortening to spatter, which
may cause serious burns.

• Do not overfill the kettle with

shortening. If shortening overflows the
kettle, it could cause serious burns or
could cause someone to slip on the floor
and be seriously injured.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

iv MN-1138EN 616B & 616BT TS

• To avoid electrocution, make sure that

all electrical cords are not frayed or
cracked and that they do not pass
through any water or shortening.

• Make sure that all electrical cords are

routed so that no one will trip over them.

1 Installation

Unpacking the Fryer

1. Use a fork lift to transport the shipping crate

to the work station.

2. Break down the shipping crate.

3. Remove all the packing materials from the

fryer. These include foam, tape, brown
paper, plastic, and white protective coating.

4. Check the fryer carefully for any damage

that may have occurred during shipping.
File any claims with the shipping company.

5. Position the fryer to allow sufficient space

on either end of the machine for any
equipment you plan to use with it.

Initial Cleaning

Clean your fryer before using it. Wipe the inside
of the kettle with a soft, damp cloth. Dry the
kettle thoroughly.

WARNING

To avoid electrocuting yourself or
damaging the machine, never allow water,
steam, cleaning solution, or other liquid to

enter the heater head or the electrical box.

WARNING

Never let water and hot shortening come in

contact with each other. Moisture causes
hot shortening to spatter, which may cause
serious injury. Prior to use, make sure the

kettle and any other parts you have washed

are dry.

Installing the Fryer

1. Make sure the power requirements of the

machine, found on the data/name plate,
match your power source.

2. Set the fryer cabinet on a flat, dry counter or

table.

3. Level the fryer.

4. Connect the fryer to a properly grounded

power source. Do not turn on the power.

5. When first filling the kettle with shortening,

if a hydrogenated or semi-solid shortening is
used, melt some shortening and pour it into
the kettle.

6. Cover the elements, thermostat bulb and high

temperature limit control bulb with
shortening before turning on the power.

Do not turn the thermostat above 250°F

until all the shortening has melted.

7. Due to the delicate mechanism of the

thermostat, it is possible for it to get out of
adjustment. If this occurs, recalibrate per the
instructions in section 4.

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616B & 616BT TS MN-1138EN 1

WARNING

8. The heater head assembly is equipped with a

high temperature limit control. Push the reset
button on the back of the heater head if
power to the heater elements is cut off.

9. When heating shortening that has solidified,

a pocket of shortening may overheat and
cause the high temperature limit control to
cut power to the elements. Push the reset
button to resume heating.

Moving the Fryer

If you ever want to move the fryer to a different
workstation, follow this procedure:

1. Turn off the fryer and disconnect it from the
power source.

2. Allow the machine and the shortening to
cool.

WARNING

6. Level the fryer and connect it to the power
source, as explained in “Installing the Fryer”
above.

Do not touch hot shortening. It can cause

serious burns.

3. Remove the shortening from the fryer as
explained in “Removing the Shortening” in
the Operator's Manual.

WARNING

To avoid burns, falls, other injury, or

death, never attempt to move the fryer

when it has shortening or other liquid in it.

WARNING

Thoroughly clean and dry the floor if

shortening is spilled. Materials on the floor

can cause people to slip or fall, resulting in

serious injury or loss of life.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

2 MN-1138EN 616B & 616BT TS

2 Cleaning

For your safety, observe the following warnings
throughout the entire cleaning process.

WARNING

Thoroughly clean and dry the floor if

shortening, water, or other materials are

spilled. Materials spilled on the floor can

cause serious injury or loss of life.

WARNING

To avoid electrocuting yourself or

damaging the machine, never allow water,

steam, shortening, cleaning solution, or any

other liquid to enter the electrical box or

the heater head.

WARNING

To avoid being burned in an explosion,

never use any flammable materials for

cleaning.

Cleaning the Frying Screen

1. In a sink or a dishwasher, wash the frying
screen using warm water and mild detergent.
Do not use an abrasive cleaner or scraper.

2. Rinse the frying screen in clear water.

3. Dry the frying screen thoroughly, using a
soft cloth, before you use it again.

WARNING

Dry the frying screen thoroughly.

Moisture causes hot shortening to spatter,

which may cause serious injury.

4. Check the frying screen to make sure no
metal is flaking off of it. If the screen is
flaking, replace it immediately, so you do
not get metal particles in your product.

Cleaning the Kettle

Removing the Shortening

WARNING

Cleaning the Exterior
Surfaces

1. Clean the polished and painted surfaces of
the fryer with a soft, damp cloth. Use a non­abrasive cleaner to remove any
discoloration.

2. Polish these surfaces with a soft, dry cloth.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

616B & 616BT TS MN-1138EN 3

To avoid being burned or electrocuted,

disconnect the fryer from the power source

before cleaning it.

1. Disconnect the machine from the power

source.

2. Let the shortening cool to 100°F/38°C.

3. Carefully dip out the shortening into a

suitable container. Do not disturb the
accumulated sediment in the bottom of the
kettle.

WARNING

Do not use a plastic container. If the

shortening is not cool enough, the container

will melt, possibly causing you to be

burned, and causing shortening spill.

WARNING

Do not allow the shortening to overflow the

containers. Shortening will get on the

floor, and if the shortening is not cool

enough, you may be burned.

4. After the kettle has been drained, brush any

accumulated carbon from the heater coils.
Accumulated carbon causes corrosion and
poor heat recovery.

5. Remove the drain tray.

WARNING

Washing

1. Wash the kettle carefully with detergent to

remove all stains and burned shortening.

2. Scrub the inside of the kettle. Do not use

any abrasive cleaners or scrapers.

WARNING

To avoid being burned, be very careful as

you work with hot cleaning solution. Never

put your hands in the solution. Wear

gloves and long sleeves in case any solution

splashes.

3. Dry the kettle thoroughly with a soft cloth

before replacing in the fryer cabinet.

WARNING

Dry the kettle thoroughly. Moisture causes

hot shortening to spatter, which may cause

serious injury.

Thoroughly clean and dry the floor if

shortening is spilled. Shortening on the

floor can cause serious injury or loss of life.

6. Remove the heater head and element.

7. Lift out the kettle and pour out the remaining

shortening and accumulated sediment.

8. Flush out the kettle with hot water to remove

all sediment.

4. Make sure the kettle is properly seated in the

case.

5. Install the heater head.

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4 MN-1138EN 616B & 616BT TS

3 Calibrating The Fryer

Calibration of 618-6
Temperature Indicator

To check calibration, use the
following steps.

1. Turn the dial of the thermostat to a medium

temperature setting of approximately 350° F.

2. Allow enough time for the temperature to

stabilize and the thermostat to cycle ON and
OFF.

3. Use a potentiometer or a good grade of

thermometer to determine temperature.

To Recalibrate:

1. Remove the ring (A) and glass crystal.

2. Insert a screwdriver in slot B, and while

holding the slotted stem in position, move the
temperature indicating needle (C) to the
correct setting with your finger.

3. Check the temperature of the frying area

again and check this against the indicator
temperature reading.

4. Re-install the ring (A) and glass crystal.

Calibrating the Thermostat

To check calibration:

1. Important: Make sure that the fryer is filled

with shortening. Read the warnings on the
control panel about high temperatures.

2. Use a good thermometer that reads

temperatures up to 400°F/204°C. Place the
thermometer in the shortening.

3. Set the fryer temperature to 375°F/190°C.

Allow enough time for the temperature to
stabilize.

4. During a 10 minute test period, the

temperature should not fall below
365°F/185°C, or exceed 385°F/196°C.

To Recalibrate:

1. Remove temperature dial from shaft B by

pulling upward.

2. Using a small screwdriver, turn screw A as

follows:

• Counter clockwise to increase

temperature

• Clockwise to decrease temperature

3. Replace the control dial on the dial shaft

4. Recheck the calibration and continue

adjusting as necessary.

Each thermostat is adjusted at the factory and
calibrated on precision instruments to control
temperatures accurately. Adjustment or
recalibration is not needed unless the thermostat
has been mishandled in transit or changed or
abused while in service.

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616B & 616BT TS MN-1138EN 5

4 Electrical Components

This appendix explains how to test the continuity
of electrical components in your fryer. These
include the toggle switch and the thermostat.

The appendix also contains a document by the
Robertshaw Controls Company, the maker of the
thermostat we use in the 618L, 624, and 634. It
explains how to check, adjust, and recalibrate the
thermostat.

Testing the Continuity of
the Toggle Switch

WARNING

To avoid the possibility of electric shock,

disconnect the machine from the power

source before testing.

1. Disconnect the machine from the power
source.

2. Disconnect the terminal wires from the
switch.

switch
terminals

toggle switch

+

battery
_

Figure 4-1. Toggle Switch Continuity Test.

3. Obtain a continuity tester or a volt-ohm
meter. If neither of these instruments is
available, make a continuity tester using a
battery and a bulb. See Figure 4-1.

4. Connect the wires of the continuity tester to
the switch terminals, as shown in Figure B­1, and test the switch in the ON and OFF
positions. The switch should show
continuity only when in the ON position.

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6 MN-1138EN 616B & 616BT TS

Testing the Continuity of
the Thermostat

WARNING

To avoid the possibility of electric shock,

disconnect the machine from the power

source before testing.

1. Disconnect the machine from the power
supply.

2. Disconnect the terminal wires from the
thermostat.

3. Connect the continuity tester across the B
terminals indicated in Figure 4-2. This set
of contacts should be closed whenever the
thermostat is on. To test, start with the
thermostat in the OFF position. Then turn
the thermostat up until you hear a distinct
click (at about the 175°F/79°C setting). At
this time, there should be continuity across
the B terminals.

4. Connect the continuity tester across the A
terminals indicated in Figure B-2. Start with
the thermostat in the OFF position and turn
the thermostat up until you hear a distinct
click. If there is no continuity (the indicator
or light does not come on), proceed to
step 5.

setting of the thermostat until it does. Then
recalibrate the thermostat according to the
manufacturer’s instructions. If the indicator or
light will not go off at any setting or
recalibration, then the thermostat is defective.

“B” terminals

“A” terminals

Figure 4-2. Thermostat Terminals.

5. With the continuity tester still connected,
turn the thermostat knob to OFF and remove
the knob. There is an adjusting screw in the
center of the knob stem. Turn it counter­clockwise until there is continuity. If there
is no continuity (the indicator or light does
not come on), then the thermostat is
defective. If there is continuity, proceed to
step 6.

6. Immerse the thermostat sensing bulb in a

pan of boiling water and set the thermostat at
about 212°F/100°C. The continuity tester’s
indicator or light should go off. If the indicator
or light does not go off, increase the temperature

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

616B & 616BT TS MN-1138EN 7

5 Appendix

See Parts List Drawing Insert Page.

Belshaw Bros., Inc. • www.belshaw.com • Phone [phone] • Fax [phone]

616B & 616BT TS MN-1138EN 9