Pitco DD24RUFM Service Manual

Technical Service and Exploded Parts

For Gas Fryers

Covering Models

DD-24RUFM

ENGLISH

FRANCAIS

®

Pitco Frialator, Inc., P.O. Box 501, Jct I-89 & I-93 Concord, NH 03302-0501 • 509 Route 3A, Bow, NH 03304

L22-234 Rev 0 (03/03)

[phone] • [phone] • FAX [phone]

www.pitco.com

®

THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE

FOR YOUR SAFETY
DO NOT store or use gasoline or other flammable vapors or liquids in the vicinity of this or
any other appliance.

WARNING
Improper installation, alteration, service or maintenance can cause property damage, injury
or death. Read the installation, operating and maintenance instructions thoroughly before

installing or servicing this equipment.

TO THE PURCHASER
Post in a prominent location the instructions to be followed in the event that an operator smells gas. Obtain this
information from your local gas supplier.

WARNING
The fryer is equipped with an oil proof, electrical supply cord with a three prong safety plug. This is to protect
operators from electrical shock hazard in the event of an equipment malfunction. DO NOT cut or remove the
grounding (third) prong from this plug.

WARNING
There is an open flame inside the fryer. The unit may get hot enough to set near by materials on fire. Keep the
area around the fryer free from combustibles.

WARNING
DO NOT supply the fryer with a gas that is not indicated on the data plate. If you need to convert the fryer to
another type of fuel, contact your dealer.

WARNING

DO NOT use an open flame to check for gas leaks!

WARNING
Wait 5 minutes before attempting to relight the pilot to allow for any gas in the fryer to dissipate.

WARNING
Never melt blocks of shortening on top of the burner tubes. This will cause a fire, and void your warranty.

WARNING
Water and shortening DO NOT mix. Keep liquids away from hot shortening. Dropping liquid frozen food into
the hot shortening will cause violent boiling.

WARNING
Ensure that the fryer can get enough air to keep the flame burning correctly. If the flame is starved for air, it can
give off a dangerous carbon Monoxide gas. Carbon monoxide is a clear odorless gas that can cause suffocation.

WARNING
A cooker equipped with casters and a flexible gas line, must be connected to the gas supply with a quick
disconnect device. This quick disconnect must comply with ANSI Z24.41. To limit the movement of the cooker
without depending on the connector or quick disconnect, a restraining cable must also be installed.

The power supply must be disconnected before servicing or cleaning the appliance

Do not attempt to move the appliance when the unit is at operating temperature.

Hot oil will cause serious personal injury if it comes in contact with you skin

L22-234 Rev 0 (03/03)

WARNING

WARNING

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L22-234 Rev 0 (03/03)

Pitco Frialator DD 24R-UFM Doughnut Fryer

Troubleshooting

TROUBLESHOOTING

Figure 24 shows a block diagram for a unit with standing pilot ignition. Figures 26
and 27 are schematics for this type of fryer. On a fryer with standing pilot ignition, the pilot
is lit by hand. The flow of gas is controlled by a valve called a “Unitrol” (V1). The Unitrol
actually includes two separate valves - one for the pilot flame, and another valve for the
main burners. When you turn the Unitrol handle to the Pilot position and push it in, the
valve for the pilot burner opens. This allows you to light the pilot flame.

A device called a “thermopile” extends into the pilot flame. The thermopile generates
a small electric current when it is heated. The Unitrol uses the current from the thermopile
to keep the gas valve open. If the pilot goes out, the gas valve will close. This prevents the
unit from leaking gas if the pilot goes out.

Once the pilot is burning, the main burners are controlled by a signal from the
temperature control (A 1). When the temperature control calls for heat, it signals to the
Unitrol, and the Unitrol turns on the gas supply for the main burners. A device called a
“thermistor” (RT1) is used to sense the actual temperature in the kettle.

Other Circuits

This fryer has a built-in filtering system. The filter pump operates on 120V AC, and

is controlled by a switch mounted on the control box panel.

The unit includes a high temperature limit switch (S3). This switch uses a sensor
bulb which is mounted inside the fry kettle. When the temperature of the shortening rises
above 450°F (232°C), this switch opens. On the version with standing pilot ignition, when
the hi limit switch opens it causes the Unitrol to close, cutting off the gas supply to the
fryer.

The pump will not be able to move the shortening if it has cooled and become solid.
The filter pan has a 120V resistive heating element (HR1) which can be turned on by a
switch behind the front door.

This fryer which includes a standard pilot and is wired for 120V AC has one
transformer (T1). This transformer produces 24V AC for the computer on the front of the
fryer. A 4 Amp slow-blow fuse protects the 24V AC output to the control circuit.

7. Drain switch. The controller will turn off if the drain valve is opened. If the controller

will not turn on, make sure the drain valve is closed.

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Troubleshooting

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Troubleshooting

Fig 26 Schematic 700341

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Troubleshooting

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Fig 27 Schematic 700341

8

Pitco Frialator DD 24R-UFM Doughnut Fryer

Troubleshooting

FRYER PROBLEM CAUSE CORRECTIVE ACTION

Computer does not come
on; nothing shows in either
display.

Computer heat light comes
on but burners do not light.

Computer displays “OFF”
and cannot be turned on

A. Main circuit breaker is

turned off.

B. Fryer fuse (F1) is blown
A. Hi limit switch may be

tripped.

B. Pilot not lit
C. Gas valve not in the on

position

A. Drain valve open
B. Drain valve switch loose
C. Drain valve switch out of

alignment

D. Bad computer.

A. Locate the correct building circuit

breaker, turn off and back on.

B. Call an Authorized Service Technician
A. Allow oil to cool and reset the hi limit

switch

B. Light pilot
C. Make sure pilot is lit and the gas valve

is in the on position

A. Close drain valve completely
B. If mounting screws are loose, try to

tighten

C. Align switch or call Authorized Service

Technician

D. Locate the correct building circuit

breaker, turn off and back on. If this
does not reset the computer, call an
Authorized Service Technician.

Computer displays “Prob” A. Open or shorted

temperature probe.

A. Call Authorized Service Technician to
test and replace probe.

FILTER PROBLEM CAUSE CORRECTIVE ACTION

Filter pump not running
with pump switch on

Filter pumps slowly and/or
blows air bubbles into to
oil.
Four to five minutes to fill
tank

Heater in filter pan will not
heat. Pan heat light (DS1)
is not on when heater
ON/OFF switch (S2) is in
the on position

Heater in filter pan will not
heat. Pan heat light is on
when heater on/off switch
is on.

A. Main circuit breaker is

turned off

B. Circuit breaker/Pump

switch (CB1) is open
or in off position

C. Defective pump motor

A. Defective filter

connections

B. Blocked filter paper
C. Bad pump
D. Intake hose leaking

A. Main circuit breaker is

turned off

B. F2 fuse is blown
C. Defective pan heat

switch

A. Pan heater not plugged

in

B. Defective pan heater

A. Locate the correct building circuit

breaker, turn off and back on

B. Turn off and back on
C. If motor is getting 120V AC and does not

run, call an Authorized Service
Technician

A. Replace filter connections if air bubbles

are in the oil being returned to the vat

B. Change the filter paper
C. Call Authorized Service Technician
D. Call Authorized Service Technician

A. Locate the correct building circuit

breaker, turn off and back on

B. Replace fuse, why did fuse blow?
C. Replace switch

A. Plug in pan heater cord to entrance box
B. Check the resistance through the heating

element. You should see a resistance of
approximately 36 ohms.

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Testing a Transformer (T1)

Check the voltage input and output on the transformer when the fryer is turned on.
When there is 120V AC at the input (term 3 & 5), you should see 24V AC at the output
(term 6 & 10). If do not see the correct output, replace the transformer. You can also use an
Ohmmeter to check for continuity through the transformer coils. Be sure neither of the
coils is shorted to the frame of the transformer.

Testing the Temperature Control Module (A1)

The output from the temperature control module is found on terminal 5. If the controller
does not produce 24VAC output on terminal 5 when the controller is calling for heat, replace
the module.

Testing the thermistor (RT1)

A “thermistor” is a special kind of resistor. The resistance of this part goes down
as it is heated. The table below shows the correct resistances at different temperatures. If
the thermistor shows an open circuit, or if it shows the wrong resistances at these
temperatures, replace it.

Testing the Hi Limit Switch (S3)

75°F = 95,539Ω 250°F = 3,458Ω
100°F = 53,146Ω 300°F = 1,734Ω
150°F = 18,695Ω 350°F = 942Ω
200°F = 7,586Ω 400°F = 547Ω

Press the red reset button. Check the switch for continuity, you should have
continuity across the switch. You should not have continuity to ground.

Testing Drain Valve Interlock (S1)

With the drain valve closed, you should have continuity through the switch. You
should not have continuity to ground.

Testing Heat Demand Relay (K1)

Check the resistance across the coil with the coil
wires off. You should see a resistance of approximately
650 ohms. With 24 volts DC at the coil, you should have
continuity across the COM and NO terminals. Without 24
volts DC at the coil, you should have continuity across the
COM and NC terminals.

Testing Gas Valve (V1)

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10

Pitco Frialator DD 24R-UFM Doughnut Fryer

Check the resistance through the gas valve. You should see a resistance of
approximately 2350 ohms across the coil of the valve.

Testing Filter Pan Heaters (HR1)

Check the resistance through the heating element. You should see a resistance of
approximately 36 ohms in the element

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ............... P7036013 ................... Reducer Bushing, 3/4 X 1/2

2 ............... P7038050 ................... 1/2” Lock Nut

3 ............... P7036902 ................... 1/2” Union

4 ............... P7037090 ................... 1/2” Close Nipple

5 ............... P7037750 ................... 1/2” Street Elbow

6 ............... P5045650 ................... Gas Valve, Nat 120V

P5045652 ................... Gas Valve, LP 120V

7 ............... P7037096 ................... 1/2” X 3 1/2” Nipple

8 ............... P7037678 ................... 1/2” Elbow

9 ............... P7037093 ................... 1/2” X 2” Nipple

10 ............. PP10084 ..................... Hi Limit Switch

A1815501 ................... Hi Limit Bracket

B6779850 ................... Hi Limit Wires

P0007300 ................... Screw, 8-32 X 1/2

PP10687 ..................... Screw, 6-32 X 5/16

11.............. A7575101 ................... Pilot Tube

12 ............. P6071450 ................... Pilot Assembly

13 ............. P5047541 ................... Thermopile

14 ............. PP11261 ..................... Bolt, 5/16 X 3/4

15 ............. P6071050 ................... 4” Burner

16 ............. A8001001 ................... Air Collar

PP10025 ..................... Screw, 10-32 X 1/4

17 ............. A1325201 ................... Right Manifold Bracket

A1325203 ................... Left Manifold Bracket

18 ............. P6071347 ................... Orifice Tip #47 Nat

P6071353 ................... Orifice Tip #53 LP

19 ............. B8019801 ................... Gas Manifold

20 ............. A3701009 ................... Heat Sheild

21 ............. PP10818 ..................... 1/2” X 28 3/4” Nipple

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Table 1

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 1

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ............... PP11124 ..................... 24VDC Relay

2 ............... PP10210 ..................... 40VA Transformer

3 ............... PP11284 ..................... Rocker Switch DPDT

4 ............... PP10082 ..................... Lamp, 125V

5 ............... P5046542 ................... Twist Receptacle

6 ............... P5045794 ................... Fuse Holder

7 ............... PP10460 ..................... 8 Amp Circuit Breaker

8 ............... A2959401 ................... Entrance Box Cover

9 ............... B6753101 ................... Entrance Box Harness

10 ............. B6753001 ................... Raceway Wiring

11 ............. B6701401 ................... Power Cord

8 - 11 Not Shown

L22-234 Rev 0 (03/03)

Table 2

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 2

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ...................... P0079500 ................................. Screw, 10-24 X 1/2

2 ...................... A4103301 ................................. Splash Back Lug

3 ...................... A4103202 ................................. Secondary Submerger Catch

A4510902 ................................. Submerger Catch

4 ...................... PP10698 ................................... Screw, 10-24 X 5/8

........................ B2400304 ................................. Drainboard Assembly (items 5-12)

5 ...................... A2402101 ................................. Drainboard Spacer Rod

6 ...................... B2400504 ................................. Drainboard Weldment

7 ...................... A2401001 ................................. Drainboard Stop Tubing

8 ...................... PP10065 ................................... Thumb Screw, 1/4-20 X 3/4

9 ...................... A2401101-1 .............................. Drainboard Support Tubing

P6071492 ................................. 5/8” Hole Plug

10 .................... B2400202 ................................. Drainboard Hinge Rod

11..................... P0026400 ................................. Bolt, 3/8-16 X 2 1/2

12 .................... P5045165 ................................. Rubber Tip

13 .................... B4506824 ................................. Submerger Screen

14 .................... PP10698 ................................... Screw, 10-24 X 5/8

15 .................... B4507501 ................................. Submerger Handle

16 .................... P6071190 ................................. Plastic Handle

17 .................... P0095200 ................................. Jam Nut

18 .................... P0142000 ................................. Acorn Nut

19 .................... PP11366 ................................... Screw, 10-24 X 5/8

20 .................... A4106802 ................................. Hi Limit Bulb/Probe Clamp

21 .................... P6072402 ................................. Tube Screen

22 .................... B4100208 ................................. Splash Back Weldment

A4100201 ................................. Splash Back Cover

L22-234 Rev 0 (03/03)

Complete Assemblies

B2400304 ........................................................... Drainboard Assembly (includes 5-12)

B4507401 ........................................................... Submerger Screen Assmbly (includes 13-18)

B4507001 ........................................................... Submerger Handle Assembly (includes 14-18)

Table 3

16

Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 3

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ............... B3500801 ................... Flue Pipe Weldment

2 ............... B3306202-C ............... 24R Stainless Steel Tank

B3306201-C ............... 24R Cold Rolled Steel Tank

3 ............... B1824601 ................... Cabinet Assembly

4 ............... A3671502 ................... Lower Front Panel

5 ............... A3671402 ................... LH Front Panel End Cap

6 ............... P0092300 ................... 10-24 Kep Nut

7 ............... 60138201 .................... DD Computer

8 ............... A3671602 ................... Front Panel Bezel

9 ............... 60125801 .................... Screw, 10-24 X 3/8

10 ............. B2304604 ................... 24R Door Assembly

11 ............. B3802404 ................... Upper Left Hinge

12 ............. B3801804 ................... Lower Left Hinge

13 ............. B3801803 ................... Lower Right Hinge

14 ............. PP11006 ..................... Door Handle

15 ............. B3802403 ................... Upper Right Hinge

16 ............. B3900701 ................... Leg Set

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17 ............. A3671404 ................... RH Front Panel End Cap

18 ............. P6071300 ................... Door Magnet Catch

Table 4

18

Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 4

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ................. A6627702 ......................... Filter Pan Cover

2 ................. P6071516 ......................... Chrome Handle

3 ................. P0007300 ......................... Screw, 8-32 X 1/4

4 ................. P6071123 ......................... 3/8 Male Connector Nipple

5 ................. P7037308 ......................... 3/8 X 4 Nipple

6 ................. P7037675 ......................... 3/8 Elbow

7 ................. P7037309 ......................... 3/8 X Nipple

8 ................. A6682202 ......................... Filter Paper Support Rack

PP10617 .......................... Filter Paper 11 X 13

9 ................. P6071526 ......................... Top & Bottom Plate

10 ............... P7037313 ......................... 3/8 X Nipple

11 ................ A6615802......................... Filter Paper Retainer Clip

12 ............... B6606801 ......................... Filter Pan Weldment

B6606901 ......................... Filter Carriage Assembly

A6668902 ......................... Heater Plate Cover

13 ............... B6620302 ......................... Filter Plate Heater

14 ............... B6635801 ......................... Filter Electrical Box

P5046545 ......................... Twist Lock Plug

PP10452 .......................... Power Cord

P5045090 ......................... 3/4” Snap Bushing

P5046220 ......................... Stain Relief Bushing

P5045432 ......................... 2X4 Box Cover

15 ............... B6606701 ......................... Filter Carriage Weldment

16 ............... P6071062 ......................... 2” Caster

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17 ............... P0011300 ......................... Screw, 10-24 X 3/8

P0092300 ......................... 10-24 Kep Nut

Complete Assemblies

B661401 ......................................... Filter Pan Cover Assembly (inc. 1-3)

Table 5

20

Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 5

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ................. B7402241-C ..................... Black Donut Assembly

2 ................. P7037301 ......................... 3/8 Close Nipple

3 ................. P6071780 ......................... 3/8 Ball Valve

PP10050 .......................... 3/8 Return Valve Handle

4 ................. P7037752 ......................... 3/8 Street Elbow

5 ................. P7036854 ......................... 3/8 Tee

6 ................. P7037300 ......................... 3/8 Space Nipple

7 ................. P7036600 ......................... 3/8 NPT Coupling

8 ................. P7037330 ......................... 3/8 X 16 Nipple

9 ................. P7037675 ......................... 3/8 Elbow

10 ............... P7037305 ......................... 3/8 X 2 1/2Nipple

11 ................ P7036901......................... 3/8 Union

12 ............... P7036014 ......................... 1/2 X 3/8 Reducer Bushing

13 ............... P5046381 ......................... .5HP Pump & Motor

P5046384 ......................... .5HP Motor Only

P6071530 ......................... Pump Only

14 ............... P7037308 ......................... 3/8 X 4 Nipple

15 ............... P7037093 ......................... 1/2 X 2 Nipple

16 ............... P7036902 ......................... 1/2 Union

17 ............... A6653510 ......................... 31-3/4 Filter Return Hose

18 ............... B7402240-C ..................... White Donut Assembly

Flush Hose Not Shown

B6602501 .............................. Filter Flush Hose Assembly

A6653505 .............................. Flush Hose

B6661001 .............................. Flush Hose Nozzle

P6071123 .............................. 3/8 Male Connector Nipple

P7037752-1 ........................... 3/8 Street Elbow

Table 6

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22

Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 6

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Pitco Frialator DD 24R-UFM Doughnut Fryer

Item # Part # Part Description

1 ............... PP10266 ..................... Screw, 4-40 X .25

2 ............... A4021601 ................... Handle Actuator Bracket

3 ............... PP10263 ..................... Proximity Switch Magnet

4 ............... B5305001 ................... DVI Electric Assembly

5 ............... A4011101 .................... Dain Valve Handle Support

6 ............... B4000801 ................... Drain Valve Handle

7 ............... PP10023 ..................... Screw, 10-24 X 3/8

8 ............... PP10699 ..................... Screw, 10-24 X 3/4

9 ............... P0092300 ................... 10-24 Kep Nut

10 ............. A4021301 ................... Drain Valve DVI Bracket

11 ............. A4021204 ................... Drain Valve Handle Bracket

12 ............. P0190145 ................... Cleavis Pin

13 ............. P0190300 ................... Cotter Pin

14 ............. PP10368 ..................... Drain Valve

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Table 7

24

Pitco Frialator DD 24R-UFM Doughnut Fryer

Figure 7

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Pitco Frialator DD 24R-UFM Doughnut Fryer

L22-234 Rev 0 (03/03)

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Pitco Frialator DD 24R-UFM Doughnut Fryer

27 L22-234 Rev 0 (03/03)

In the event of problems with or questions about

your order, please contact the Pitco Frialator factory,
from 8:00 a.m. - 5:00 p.m., Eastern Standard Time,
Monday through Friday, toll-free at:

In the event of problems with or questions about

your order, please contact the Pitco Frialator Autho­rized Service and Parts representative (ASAP)
covering your area, through Pitco at:

[phone] US and Canada only or

[phone]

L22-234 Rev 0 (03/03)

[phone] US only, 24 hours