Pitco ME14S-C-MFD Service Manual
Service Manual
ELECTRIC FRYER with FILTER
MODEL ME14S-C/MFD
MANUFACTURED EXCLUSIVELY FOR
McDONALD'S
®
PITCO FRIALATOR, INC.
P.O.BOX 501 CONCORD, NH 03302-0501
Phone: 1(603)225-6684
Toll Free: 1(800)258-3708
Fax: 1(603)225-8497
Pitco Frialator
Literature # L20-139 Rev. 1 Rev Date January 2002 Made in the United States of America
NOTICES
There are three different types of notices that you should be familiar with, a NOTICE, CAUTION, and
WARNING. A NOTICE is a special note used to call attention to a particularly important point. CAUTION
is used to point out a procedure or operation which may cause equipment damage. The WARNING notice
is the most important of the three because it warns of an operation that may cause personal injury. Please
familiarize yourself with your new cooker before operating it and heed the notices throughout this manual.
The WARNINGS are listed below and on the following page for your review prior to operatng the unit.
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, adjustment, alteration, service or
maintenance can cause property damage, injury or death.
Read the installation, operating and maintenance thoroughly before installing or servicing this equipment.
THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE
SAFETY SAFETY SAFETY SAFETY SAFETY
WARNING
The fryer must be electrically grounded in accordance with local codes. If local codes do not apply
follow the requirements of National Code ANSI/NFPA 70-1990
WARNING
Before connecting any fryer make sure that all the circuit breakers for the appliance(s) are OPEN or
OFF. NEVER connect the fryer with power applied to the power lines. Some appliances have more
than one power supply. Make sure they are ALL disconnected.
WARNING
The heating elements MUST be covered with water or oil before they are turned on. NEVER turn
on the fryer unless the elements are covered by at least one inch of liquid. For the Element Burn OFF
Proceedure refer to the operation manual.
WARNING
Never melt blocks of shortening on top of the heating elements. 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
At operating temperature the shortening temperature will be greater than 300°F. Extreme care
should be used when filtering operating temperature shortening to avoid personnel injury.
WARNING
Follow the filtering proceedures carefully when filtering, these can be found in the operating manual.
Before handling any parts after filtering make sure they have cooled to room temperature.
WARNING
All power supplies must be disconnected before servicing. Some appliances have more than one
power supply. Make sure they are ALL disconnected.
WARNING
DANGER - HIGH VOLTAGE PRESENT
NEVER remove the entrance box cover unless all power to the appliance has been disconnected.
SAFETY SAFETY SAFETY SAFETY SAFETY
Table of Contents
Table of Contents.............................................................................. i
Warranty Statement .......................................................................... 1
Chapter 1: INSTALLATION INSTRUCTIONS .................................... 2
Ventilation......................................................................................... 2
Clearances......................................................................................... 2
Once the fryers are in place .............................................................. 2
Filling the fryer with oil ................................................................... 3
Set Up ............................................................................................... 3
Shut Down ........................................................................................ 3
Chapter 2: HOW DOES IT WORK?...................................................... 4
Heating System................................................................................. 4
Hi - Limit System ............................................................................. 4
Filter System..................................................................................... 5
Hood Relay System .......................................................................... 5
Chapter 3: COMPONENT TROUBLESHOOTING.............................. 5
Probe................................................................................................. 5
Relays ............................................................................................... 6
Hi Limits........................................................................................... 6
Drain Valve & Return Valve Switches ............................................. 6
Transformer ...................................................................................... 6
Elements ........................................................................................... 6
Contactor .......................................................................................... 6
Chapter 4: TROUBLESHOOTING........................................................ 7
Fryers ................................................................................................ 7
Filters ................................................................................................ 8
Chapter 5: COMPONENT CHANGEOUT............................................ 9
Probe................................................................................................. 9
Hi Limit ............................................................................................ 9
Elements ........................................................................................... 9
Components mounted in the front panel .......................................... 9
Heat Demand Relays ........................................................................ 10
Circuit Breaker ................................................................................. 10
Hood & Filter Relays........................................................................ 10
Control relays ................................................................................... 11
Proximity Switches........................................................................... 11
Filter Pumps...................................................................................... 11
Chapter 6: PARTS SECTION................................................................. 12
Chapter 7: SCHEMATICS...................................................................... 39
i
WARRANTY STATEMENT
Pitco Frialator, Inc. makes the following limited war ranties to the original purchaser only for this equipment and replacement parts:
1. WARRANTY PROVISIONS - FRYERS
A. Pitco Frialator, Inc. warrants all parts, with
the exception of the frypot, elements and
computer for 1 year after the date of installation of the fryer .
B. If any parts become defective during the first
year after the installation date, Pitco Frialator will also pay for the labor, freight and
travel costs involved in replacing said part.
2. WARRANTY PROVISIONS - FRYPOTS
A. If a frypot develops a leak due to a defect in
material or workmanship within the first 10
years after installation, Pitco Frialator, Inc.
will either weld or replace, at its discretion,
the frypot.
B. The customer will be responsible for all
freight, labor and travel charges for this repair, except within the period stated in section 1-B.
3. W ARRANTY PROVISIONS - COMPUTER
A. Pitco Frialator, Inc. will warrant the Intelli-
fry Computer from defects in material or
workmanship for a period of two years.
B. If the computer is found to be defective dur-
ing the first 2 years after the installation date,
Pitco Frialator Inc. will also pay for the labor, freight and travel costs involved in replacing said part.
4. W ARRANTY PROVISIONS - ELEMENTS
A. Pitco Frialator, Inc. will warrant the Electric
Elements from defects in material or workmanship for a period of 3 years.
B. The customer will be responsible for all
freight, labor and travel charges for this repair, except within the period stated in section 1-B.
Retain this manual for future reference.
1
INSTALLATION INSTRUCTIONS
Clearances:
CAUTION:
This equipment is manufactured for the use on a
particular voltage and phase which is specified on
the rating plate located on the inside of the door .
When your fryers arrive, look them over carefully
noting any damage on the freight bill. If concealed
damage is found after you have accepted the equipment, report it to the carrier immediately as all claims
must be filled within 15 days of the receipt of the
shipment. Also, be sure to keep all packing materials as these will be necessary to make any claim.
Follow these installation instructions carefully. A
proper installation is important for the operation of
the fryers.
All installations must conform to all local and state
codes and well as the United States National Electrical Code (ANSI/N.F.P.A. No. 70-1987). In
Canada, installations must be made in accordance to
Canadian Electrical Code Part I, CSA-C22.1.
Minimum clearance of 6" (15cm) must be maintained
from combustible construction on each side and the
rear of the equipment. This equipment may be installed on combustible floors.
Maintain a minimum of 24"(61cm) clearance in front
of the fryer to provide for proper operation, maintenance and servicing.
Wiring diagram(s) are located in the back of the service manual and inside the fryers.
The control (interlock) voltage for this equipment
must be 120VAC (US & Canada). For other countries please check the rating plate.
Regular cleaning of this equipment, as well as the
hood, is an important part of proper maintenance.
Refer to Maintenance Requirement Cards for proper
procedure and frequency .
Once the fryers are in place:
Do not block the area around the casters and under
the fryers. Contact the Autorized Pitco Frialator representative for any service related problems. Routine maintenance may be performed by qualified
personnel.
The duct system, the hood system and the fryers must
be cleaned on a regular basis and must be kept clear
of any grease build up. See the appropriate Maintenance Requirements Cards.
Ventilation:
A proper ventilation system is also an important part
of the installation. For information on the construction and installation of ventilating hoods, please see
“Standard for the Installation of Equipment for the
Removal of Smoke and Grease Laden Vapors from
Commercial Cooking Equipment”, N.F .P.A. No. 96-
1987. Copies can be obtained by writing to the Na-
tional Fire Protection Association, Battery March
Park, Quincy, MA 02269
Leveling the fryers will help ensure proper operation. T o level the fryers loosen the two set screws on
the caster stem. Rotate the collar of the caster to raise
or lower the height of the unit. Tighten set screws to
lock the adjustment. Casters should be adjusted so
that the fryers are level and at the correct height under the hood system.
Clean the fry tanks using the Boil Out procedure on
Maintenance Card 14A.
A wiring diagram is located in the back of this manual
and inside the fryers.
EQUIPMENT SET UP AND SHUT DOWN
PROCEDURES
NOTE: Should you experience a power failure, your
fryers will shut off automatically. Once the power
has been restored, press the key to turn the fryer
back ON. If the machine is being filtered, close the
RED return valve so that the filter does not run if the
machine is left unattended. Do not attempt to restart
the fryers until the power is restored.
2
Filling the fryer with oil:
It is very important to make sure the oil level is correct before attempting to heat shortening in your Pitco
fryer.
Liquid shortening can be poured directly into the fry
tank until the correct level has been reached. This is
indicated by a line on the right hand side of the inside of the tank.
NOTE: The “C” (Cold) level is considered to be the
“MINIMUM” oil level and the “H” (Hot) level is
considered to be the “MAXIMUM” oil level.
For solid shortening, the shortening must be cut into
small blocks about 1" (2.54 Cm) in size. These small
blocks must be placed under and around the heating
elements.
The fryer can now be turned ON.
be necessary to add shortening to maintain the proper
level.
NOTE: When adding solid shortening to an empty
fry tank, first remove the baskets and support racks
and fill the bottom of the tank with shortening, continue to pack the remaining shortening into the tank.
Place the basket support rack on top of the shortening before turning the unit ON.
For liquid shortening fill to the level lines indicated
on the side of the tank.
Shut Down:
Press the corresponding key to turn the fryer OFF .
The Computer display will show "OFF" and all heating functions will cease.
NOTE: When the fryer is not being used, place the
cover over the fry tank.
Set-Up:
NOTE: Please read the Operating instructions thor-
oughly before attempting to operate this equipment.
Make sure the power cords are plugged into the correct receptacles and the proper building circuit breakers are turned ON.
Press the key on either side of the full vat computer, or the right key for the right side and the
left key for the left side of a split vat computer to
turn the unit ON.
The computer display will light and the heating elements will begin to heat and will be controlled by
the computer/controller.
NOTE: From a cold start the fryer will automatically begin a melt cycle. This is a condition where
the computer will heat the shortening in small controlled bursts of heat. Once the predetermined temperature has been reached, the unit will exit the melt
cycle and go to normal operation. The melt cycle
cannot be overridden.
Make sure that the shortening is at the proper level
after cooking temperature has been reached. It may
3
Chapter 1: HOW DOES IT WORK?
The McDonalds Electric fryer will have certain reactions to what is happening, knowing what these
reactions are and knowing what the machine is trying to do will enable us to diagnose most of the problems likely to be encountered.
Heating System
energize a Relay (K15) that will turn the Hood system ON. The Power On Relay (K2) will be energized, closing the circuit. If the Hi Limit (S1) is NOT
tripped the Safety Contactor (K10) will energize.
Computer calls for heat:
The Heat Demand Relay (K1) will energize supplying the Heat Demand Contactors (K4, K5 & K6) with
24 VAC. This will also supply the computer with a
heat feedback signal.
Power to the machine is turned ON:
The computer is supplied with 24VAC and, if the
Drain Valve Handle is closed, the Proximity Switch
(S3) will supply 24 VAC to the DVI (Drain Valve
Interlock) Input at the computer .
The computer is turned ON:
The first computer in the "battery" of fryers (this includes either side of a split vat) to be turned ON will
Hi Limit System:
When the Hi Limit (S1) trips it causes the Relay (K3)
to energize opening the supply voltage circuit to the
Safety (K10) and Heat Demand (K4, K5 & K6)
Contactors. This Relay (K3) has a loop circuit that
will cause it to stay energized until the Hi Limit (S1)
resets and the power to the machine is turned OFF
and back ON again.
4
Filter System:
Opening the RED Return Valve Handle will cause
the Pump On Relay to be energized and the pump
will begin to pump. Closing the Return Valve Handle
will de - energize the Relay and the Pump will stop
pumping.
Hood Relay System:
There is one Hood Relay (K15) per "battery" of fryers, it is wired in parallel to every computer (both
sides of a split vat). When any side of any computer
is turned ON this Relay (K15) will energize and will
stay energized until all of the computers are turned
OFF.
Chapter 2: COMPONENT
TROUBLESHOOTING:
Probe:
The resistance of the probe will change as the temperature changes. The resistance will decrease as the
temperature rises. The lower the temperature the
greater the resistance change will be per degree of
temperature change, as the temperature approaches
the working range of the probe, the resistance change
will become more linear.
If the probe is suspect, check its resistance and the
oil/air temperature at which it was taken. Compare
these values on the chart below .
TEMP RESISTANCE TEMP RESISTANCE
°F Ohms °F Ohms
60 139055 330 1192
80 84644 335 1123
100 53146 340 1058
120 34328 345 998
140 22755 350 942
160 15446 355 890
180 10716 360 841
200 7586 365 795
210 6427 370 752
220 5470 375 712
240 4013 380 675
260 2991 385 640
280 2262 390 607
300 1734 395 576
320 1347 400 547
325 1267
If the probe returns an open circuit or O Ohms reading it should be replaced. If the resistance varies more
than 20 Ohms when being checked between 325375°F the probe will give a false temperature reading on the computer and should be replaced. However, it will continue to operate at a slightly higher
or lower temperature. Allow the oil to cool and check
the probe resistance at a lower temperature. As can
be seen from the chart a greater degree of offset can
be allowed at a lower temperature.
5
Relays:
Transformer:
The Heat Demand and Hood relays are 24VDC relays and will energize when the correct voltage is
supplied to the coil. When energizing, the relay
Switching Contacts will close, thus connecting the
Common and Normally Open terminals. The Hi Limit relay is a 24VAC relay and may be checked in
the same manner as the above relay.
Hi Limits:
A Hi - Limit switch is a normally closed switch until
the temperature at the probe reaches 435 ± 15°F.
In order to test this switch it will be necessary to
bypass the Heat Demand Relay. Refer to Page 7 of
the Operating Manual for instructions on how to
perform this test.
WARNING
Do NOT leave the machine during this test. This
test will cause the oil to heat past the normal operating temperature and can cause damage to the
machine and its operator.
Transformers are multiple input voltage 24 volt output voltage and can be checked by reading the input
and output voltages.
Elements:
Each Element has three coils inside it, check all element coils with an Ohm Meter, the resistance should
correspond to the chart below, if the resistance varies more than 5 Ohm the element will need to be
changed. Also check for continuity to ground on each
end of the suspect element, there should be no continuity to ground.
208 volt elements 18.5 Ohms
220 volt elements 20.7 Ohms
240 volt elements 24.6 Ohms
Contactor:
Check the coil with an Ohm Meter, the resistance
should be approximately (400 Ohms), if it does not
have this resistance it should be changed.
If the switch does not trip between the prescribed
limits it is defective and should be replaced. Once
tripped, the switch will not reset until the oil has
cooled to approximately 400°F. If the switch does
not reset it is defective.
Drain Valve & Return Valve Switches:
This switch is a magnetically operated Reed switch.
When the Drain Valve handle is moved to the open
position, the Actuator will move away from the
switch causing the Reed switch to open. When the
Drain Valve is closed the Reed switch will close. This
switch can also be checked with an Ohm meter. The
normal gap between the Actuator and the Sensor
switch on the Drain Valve handle is 1/8" - 1/4"
(3 - 6mm).
6
Chapter 3: TROUBLESHOOTING GUIDE
Fryers:
PROBLEM POSSIBLE CAUSE ACTION
Computer will NOT turn ON A. No power to the machine A. Check building circuit breaker
Display does NOT light B. F1 Fuse is blown Check power cord is plugged in
C. T1 Transformer B. Check Fuse F1.replace if defective
C. Check voltage In & Out of TI
Computer comes ON, Hood A. Hood relay A. Check & replace if defective
system does NOT
Computer shows "IGNITION" A. Hi Limit tripped A. If oil is below 400°F, reset Hi Limit
"F AILURE" and machine does B. Safety contactor replace if defective. If oil is above
NOT heat C. Heat Demand relay 400°F, allow to cool and try to reset
D. Hi Limit relay B. Check & replace if defective
E. Power On relay C. Check & replace if defective
F. Heat Demand relay D. Check & replace if defective
G. Elements E. Check & replace if defective
F. Check & replace if defective
G. Check & replace if defective
Machine is heating slowly A. Heat Demand relay A. Check & replace if defective
B. Element B. Check & replace if defective
C. Loss of power on 1 leg of C. Check input power, repair or call
3 Phase input power Authorized Electrician
Oil is Colder or Hotter than A. Probe A. Check & replace if defective
computer/controller registers B. Probe wiring terminals B. Clean or repair
Computer display shows A. Green Drain valve not fully A. Check position of handle
"DRAINING" or "TURN OFF" closed B. Switch may be loose or have
B. Sensor switch loose wires
C. Incorrect switch gap C. Check gap, replace if defective
Elements do not stay down or A. Spring tension A. Check & adjust
seem to float or are stuck in up B. Lock handle may be stiff or B. Loosen & lubricate
position seized
7
Filters:
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Red Return Valve is open but no A . Red Return Valve NOT fully open A. Pull slightly on the Red handle to check
pump sound can be heard B. Filter Circuit Breaker may be tripped that it is fully open.
C. Filter Motor Thermal Overload may B. Locate the circuit breaker and reset.
be tripped C . Push Red reset button located on end of
D. Sensor switch may be loose or filter motor .
defective D. Check that the switch is tight in its
mounting. If switch is bad replace it.
Drain valve is closed and the A. Green Drain Valve is NOT fully A. Apply a little more pressure to the
computer has been reset but Closed Green Handle to check that it is
still shows "DRAINING" or B. Sensor switch may be loose or bad fully closed.
"TURN OFF" B. Check that the switch is tight in its
mounting. If switch is bad replace it.
Drain Valve is OPEN, the oil A. Green Drain Valve is NOT fully open A. Apply a little more pressure to the
is draining slowly or not at all. B. Drain is plugged with debris Green Handle to check that it is fully
open.
B. Use the Clean Out Rod from inside the
Fry Vat to clear the Drain Valve. If this
does NOT clear the blockage, CLOSE
the Green Drain Valve and follow these
instructions for clearing the main drain
line.
CAUTION:
Some HOT oil may still come out when
the cap is removed.
Remove the two screw from the end
cap (Do NOT lose these.) Use the
Clean Out Rod to clear the main drain
tube. Install the end cap along with its
gasket and two screws. Do not
overtighten these screws.
8
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