Pitco 18WK Service Manual

PITCO FRIALATOR, INC.

501

18 WK KENTUCKY FRIED CHICKEN

EQUIPPED WITH A 821 AJMK-KF2

COOKING COMPUTER

STORE MANAGER

TROUBLESHOOTING

MANUAL

Pitco Frialator, Inc.

P.O. Box

Concord, N.H. 03301

Phone [phone]

Service Dept. 603-225-5688

A BLODGETT Company

TROUBLESHOOTING PITCO FRIALATOR

CONDITION POSSIBLE CAUSE REMEDY

NO PILOT LIGHT. 1. HIGH LIMIT TRIPPED. 1. Reset high limit, if unable call

authorized service agent for

replacement.

2. HIGH LIMIT NOT TRIPPED. 2. Call authorized serv ice agent.

PILOT LIGHT ON, NO HEAT. 1. PILOT KNOB IN PI LOT

POSITION.

2. PILOT KNOB IS IN ON

POSITION, NO HEAT.

1. Turn to ON position.

2. ON -OFF switch in OFF

position.

3. Exit fill key not pressed after

being refilled.

4. Float switch stuck in down
position or float bulb off,
clean or install with new hold

clip.

5. Defective computer, call

authorized serv ice agent.

6. Defective computer probe,
call authorized service agent.

PITCO FRIALATOR, INC.

GAS FIRED DEEP FAT FRYER

SERVICEMAN'S

SERVICE MANUAL

18 WK KENTUCKY FRIED CHICKEN

CONTENTS
SECTION 1S SERVICE PROCEDURES
SECTION 2S TROUBLESHOOTING CHARTS
SECTION 3S WIRING DIAGRAMS
SECTION 4S PARTS LISTS

Pitco Frialator, Inc.

P.O. Box 501

Concord, N.H. 03301

Phone [phone]

Service Dept. 603-225-5688

A BLODGETT Company

PITCO Frialator, Inc. WORLD'S LEADING MANUFACTURER

P.O. Box 501, Concord, New Hampshire 03301 OF DEEP FAT FRYERS

SECTION 1S SERVICE PROCEDURES

Parts can be identified from diagrams on Parts List page for each model.

1.1 TO REMOVE MAIN BURNER

a. Turn Unitrol knob to "OFF" position.
b. Loosen set screw in base of burner casting.

c. Unscrew and remove two hex head screws at top of burner.
d. Unscrew and remove air collar and locknut from burner.
e. Lift burner up to clear top of burner fitting and remove from fryer.

f. Reverse procedure to remount burner.

1.2 TO CHANGE MAIN BURNER ORIFICE

a. Follow procedure in Section 1.1.
b. After burner has been removed, unscrew orifice with a 3/8" wrench.

c. Screw in new orifice - tighten gas tight.
d. Remount burner, air collar and locknut.

1.3 TO REPLACE HEAT TUBE BAFFLES
a. Remove main burners: follow procedure in Section 1.1 .a. through e.

b. Baffles are fastened to the inside of the heat tube by a small tack weld on the right hand front baffle support. Break

leg away from weld with a chisel or solid steel bar.

c. Remove old baffles and insert new ones in tubes in original position.
d. Remount main burners.

1.4 TO REMOVE PILOT BURNER

a. Follow procedure in Section 1.1 and remove main burner to the right of the pilot burner.
b. Unscrew and remove tubing nut from pilot tubing connection on Unitrol.

c. Unscrew and remove thermopile from connection on Unitrol.
d. Unscrew and remove the two screws holding the pilot to the bracket on the fat container and lift the entire pilot

assembly out of the fryer.

1.5 TO CHANGE PILOT BURNER ORIFICE

a. Follow procedure in 1.4.
b. Unscrew tubing nut in fitting in base of pilot burner.

c. Unscrew fitting in base of pilot burner and withdraw orifice from inside the fitting.
d. Insert new orifice and reverse procedure to re-assemble.

e. Tighten all screws and connections and test for gas leaks.

1

PITCO Frialator, Inc. WORLD'S LEADING MANUFACTURER

P.O. Box 501, Concord, New Hampshire 03301 OF DEEP FAT FRYERS

SECTION 1 S SERVICE PROCEDURES (Cont'd)

1.6 TO REPLACE THERMOPILE

a. Follow procedure in 1.4.

b. Unscrew and remove thermopile from pilot burner bracket.
c. Replace with new thermopile.
d. Reverse procedure to re-assemble.
e. Tighten all screws and connections and test for gas leaks.

1.7 TO ADJUST PILOT FLAME

a. Make this adjustment with pilot burner lit.

b. Remove screw cap underneath pilot supply tubing connection to Unitrol valve.
c. Insert long handled screwdriver with 1/8" wide blade in adjusting screw slot inside this pilot supply fitting.
d. Turn adjusting screw clockwise to decrease or counterclockwise to increase pilot flame. Watch size of pilot flame

while turning adjusting screw.

CAUTION DO NOT REMOVE ADJUSTING SCREW

e. Replace screw cap when desired flame size is obtained.
f. Replace pilot orifice if desired flame cannot be obtained by adjustment. See Procedure 1.5.

1.8 TO REPLACE LIMIT CONTROL

a. Turn Unitrol knob to "OFF."

b. Drain all shortening from fry kettle. Remove tube screen.
c. Unscrew and remove the two screws in the limit bulb clamp on the heat tube inside the fry kettle.

d. Take sensing bulb out of the clamp and straighten the capillary tubing.
e. Remove the two burners that are in front of the capillary connector fitting on the bottom of the fry kettle. See

Procedure 1.1.
f. Unscrew small hex nut in connector fitting of control to be replaced.

g. Unscrew large connector nut and withdraw capillary and bulb from fry kettle.
h. Remove the two wires off the limit control terminals.
i. Unscrew and remove the two mounting screws in the limit control bracket and remove the limit control from the fryer.

j. Unpack the new limit control and carefully unroll the capillary tubing and straighten it out.
k. Install the new limit control by reversing the procedure. BE CAREFUL NOT TO BEND, KINK OR TWIST THE

CAPILLARY TUBING SHARPLY. THIS WILL DESTROY THE LIMIT CONTROL.

2

SECTION 2S TROUBLESHOOTING CHART

ing pilot flame on

Check continuity across limit control

fold should

TROUBLE POSSIBLE CAUSE REMEDY

Pilot will light but Unitrol main gas valve
will not hold open automatically.

1. Pilot thermopile not hot enough to

generate required millivoltage.

2. Loose wire connection in millivoltage

circuit.

3. Thermopile producing insufficient

millivoltage.

4. High limit control may have cut out. 4.

5. Pilot flame too small. 5. Check millivoltage as above;

1. Hold Unitrol knob (in PILOT
position) depressed for 1 minute or
longer. Make sure all air has been
purged from gas line.

2. Check all wire connections.

3. Check voltage at Unitrol with
millivoltmeter, hold
manually as in No. 1 above.
Reading should be between 140 and
450 mv.

terminals with meter. If limit control
has cut off, check at what
temperature it cut off.

increase size of flame with Unitrol
pilot adjusting screw.

6. Pilot flame burning yellow. 6. Remove and clean pilot and

thermopile; decrease size of flame
with Unit rol pilot adjusting screw if
over 450 mv.

7. Draft may be pulling flame off

thermopile.

8. Gas pressure too low. 8. Pressure at burner mani

7. Eliminate the draft.

be 4.0" w.c. for natural gas and

10.0" w.c. for propane with all
appliances on same gas line in full
operation. Increase building pipe
size, gas meter size or number of LP
tanks. Consult gas company.

3

SECTION 2S TROUBLESHOOTING CHART (Cont'd)

TROUBLE POSSIBLE CAUSE REMEDY

Pilot will light but Unitrol 9. Defective thermopile. 9. Replace thermopile.
main gas valve will not hold open

automatically.
Pilot flame lit but burners will not light. 1. Unitrol valve handle not turned to

10. Defective Unitrol magnet. 10. Replace magnet.

1. Turn handle counter clockwise as

ON.

far as it will go.

Pilot flame and main burners cutoff
while cooking.

Fryer temperature recovery too slow. 1. Excessive up-draft on fryer flue. 1. Reduce exhaust blower speed or

2. Float switch bulb off or stuck down. 2. Install float switch bulb and new

clip. a. Pull bulb up and clean
shaft.

3. Supply cord may not be plugged in

or switch may not be turned on.

4. Defective probe. 4. Replace probe.

5. Defective computer. 5. Replace.

6. Defective Unitrol. 6. Replace Unitrol.

1. See list of Causes and Remedies
for "Pilot will light but Unitrol main
gas valve will not hold open
automatically."

2. Low gas pressure. 2. Minimum operating pressures:

3. Check electric supply circuit.

locate it at a greater distance from
fryer.

Natural Gas - 4.0" w.c.; Propane
Gas -10.0" w.c.

3. Incorrect burner orifices. 3. Call factory to learn proper sizes.

4. Carbon build-up on heat tubes. 4. Clean fry kettle and tubes.

Pilot flame is yellow. 1. Pilot flame too large. 1. Adjust Unitrol pilot adjustment

5. Baffles in heat tubes may be
burned out.

2, Carbon build-up on thermopile. 2. Remove and clean.

5. Replace baffles.

screw.

4

SECTION 2S TROUBLESHOOTING CHART (Cont'd)

TROUBLE POSSIBLE CAUSE

Burner flames will not enter heat
tubes.

1. Downdraft on fryer flue opening,
or vent not turned on.

2. Orifices may be too large. 2. Call factory to learn proper sizes.

1. Protect flue opening from
downdrafts, breezes or air flows
from blowers.

a. Turn Vent on.

REMEDY

. 4. Burners out of alignment. 4. Loosen burner mounting screws

Main burners will not shut off
automatically.

Main burner flames are yellow. 1. Improper air collar adjustment. 1. Adjust air collars.

3. Gas pressure too high. 3. On natural gas adjust Unitrol

pressure regulator to 4.0" w.c.
operating pressure. On propane
gas have gas supplier adjust tank
pressure to provide 10.0" w.c.
operating pressure at the fryer.

and line up burners.

1. Clogged vent cap on Uni-trol. 1. Remove and clean cap.

2. Defective Unitrol. 2. Replace Unitrol.

Howling or screeching noise when
burners are on.

2. Main burners dirty. 2. Remove burners and clean.

3. Improper gas pressure. 3. On natural gas adjust Unitrol

pressure regulator to 4.0" w.c.
operating pressure. On propane
gas have gas supplier adjust tank
pressure to provide 10.0" w.c.
operating pressure at the fryer.

4. Orifices are too large. 4. Call factory to learn proper sizes.

1. Gas pressure too high. 1. Adjust pressure regulator.

2. Dirt or burr on burner orifice. 2. Clean orifice or replace.

5

Part No. Item No. Item Description Part No. Item No. Item Description

Container

P8013485

17

Main Burner Lock Bolt

P6094991

2

Name Plate

(5/16 x 1/2 Sq.Head

P5047541

4

Thermopile

P6071768

18

Drain Valve 1 1/4"

R/Shaw #51023

A3701107

19

Heat Shield

B7285301

5

Pilot Burner Natural

B7220030

20

Door Assembly RH

W/Heat Shield

Std w/Handle

W/Heat Shield

P6071496

22

Snap Buttons

P6071805

6

Unitrol Limit Wire

P8012010

23

Burner Mounting Bolts

P5045650

7

Unitrol Natural 120V

(5/16" x 3/4" Brass)

R/Shaw #337-901-

P6071300

24

Magnetic Door Catch

P5045652

7

Unitrol Propane 120V

A1400202

26

Probe and Limit Bulb Clamp

R/Shaw #337-902-

A3301002

27

Clean Out Rod

272A

B7252501

28

Heat Tube Baffles

P6071267

8

Unitrol Knob

P6072186

29

Tube Screen

9

Mfg. Data Plate

P7037467

30

Drain Extension 1 1/4 x 14"

B7420040

11

Main Burner Orifices

B7202201

32

Drain Valve Hndl

Natural

B7200805

33

Front Panel Std

B7420053

11

Main Burner Orifices

A1301101

34

Thermostat Mtg. Bracket

P6071360

13

Air Collar Nut

A1303505

38

Manifold Bracket

P6071997

14

Burner Fittings

P6071303

39

Unitrol Magnet

B7550107

15

Burner Manifold

A3700107

40

Heat Deflector

B7100860 1 Stainless Steel Fat P7036726 16 Pressure Test Plug 1/4"

P5047210 3 High limit Control

Plated)

B7285302 5 Pilot Burner Propane P6071516 21 Door Handle

212A P5047217 25 Float Switch

P6071005 10 Main Burners P7037754 31 1 1/ 4 St. Elbow

Propane B7233007 35 Caster w/o Lock 8"

P6071091 12 Air Collar Plated B7473011 37 Adjustable Legs 8"

MODEL NO. AND SERIAL NUMBER OF FRYER MUST BE GIVEN ON ALL PARTS ORDERS.
If serial number or part name is not known, enclose pencil sketch with order.

6

7

Fat Vat

Section

Kitchen Equip.
ISSUE

Waste Shortening Container

The Fat Vat waste shortening container is
specifically designed to handle the task of
securing waste shortening from fryers and
transporting it to outside grease dumpsters or
barrels.

This unique lightweight container was engineered
with safety and convenience in mind to
supersede conventional methods used for
transporting waste shortening.

DATE ↓↓ January 1, 1986

Subsection
Fryers/Cookers

Specifications:

Height: 35"
Depth: 8"
Width: 12"
Weight: 16 Ibs.
Color: Silver/Gray

Beneficial Characteristics

• Helps eliminate the mess

• Secures hot waste shortening

• Convenient to transport

• Easy to dump —lightweight

• Holds 7 1/2 gallons of waste shortening

• One year limited warrantee

Operational Instructions:

• Open lid, lay container down under fryer,
release valve

• Drain waste shortening into Fat Vat

• Close lid and transport by pulling or

pushing

• Hook lid lip on dumpster and, holding both
bottom and top handles, empty shortening
into grease container

• Clean Fat Vat with hot water and amonia,
air dry

KFC NATIONAL PURCHASING COOPERATIVE, INC.

P.O. Box 32033
Louisville, KY 40232

Call: 502-459-2700 or 800-626-5687