Pitco Frialator MG14S-C, MG14S-MFD General Manual

GAS FRYER with FILTER

MODEL MG14S-C/MFD

MANUFACTURED EXCLUSIVELY FOR

MCDONALD'S

®

PITCO FRIALATOR, INC.

P.O.BOX 501 CONCORD, NH 03302-0501

Phone: [phone]

Toll Free: 1(800)258-3708

Fax: [phone]

Literature # L20-140 Rev 0 Rev Date 9 July 1996 Made in the United States of America

FOR YOUR SAFETY:
Do not store gasoline or other flammable
vapors or liquids in the vicinity of this or any

other appliance.

TO THE PURCHASER
POST IN A PROMINENT LOCATION IN­STRUCTIONS TO BE FOLLOWED IN THE
EVENT THAT AN OPERATOR SMELLS GAS.
OBTAIN THIS INFORMATION FROM YOUR

LOCAL GAS SUPPLIER.

WARNING:
IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE
CAN CAUSE PROPERTY DAMAGE, INJURY
OR DEATH. READ THE INSTALLATION, OP­ERATING AND MAINTENANCE MANUALS
THOROUGHLY BEFORE INSTALLING OR

SERVICING THIS EQUIPMENT.

WARNING

This appliance is equipped with a grounding plug.
This is for your protection against shock hazard in
the event of equipment malfunction. Always plug
the unit into a properly grounded receptacle. DO
NOT cut or remove the grounding prong.

WARNING
DO NOT use an open flame to check for gas leaks!
Keep all open flames away from the machine at all
times.

WARNING

Machines equipped with casters and a flexible power
cord, must be connected to a gas supply with a Quick­Disconnect device. This quick disconnect must comply
with ANSI Z24.41. To limit the movement of the unit
without depending on the connector or quick
disconnect, a restraining device must also be installed.

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

of air it can give off a dangerous carbon monoxide gas.
Carbon Monoxide is a clear odorless gas that can
cause suffocation.

WARNING
Carbon Monoxide gas can build up if you obstruct the
flue. Blocking the flue will also cause the unit to
overheat. DO NOT obstruct the flow of com­bustion/ventilation or air opening around the machine.
Ensure that you meet the minimum clearances
specified in the installation instructions. Adequate
clearance around the unit is necessary for servicing
and proper burner operation.

WARNING
If the machine should shut down unexpectedly wait 5
minutes before attempting to restart it. This will allow
for any excess gas in the unit to dissipate.

WARNING
The power supply must be disconnected before
servicing or cleaning the unit.

WARNING
DO NOT supply the fryer with a gas that is not
identified on the data plate, located on the inside of
one of the doors of the machine. If you need to convert
the machine to another type of fuel, contact your dealer
or Authorized Pitco Service Agency.

WARNING
To prevent tipping of the machine and splashing of
HOT oil your Pitco Frialator fryer is equipped with a
Gas Hose Quick Disconnect and restraining device.
This attaches the rear of the machine to the wall. When
the fryer is in its operating location, lock the casters
and reattach the restraining device to the rear of the
machine.

WARNING
Shortening, when it is at cooking temperatures, is very
HOT and DANGEROUS! Use extreme caution when
handling! Use the proper protective gear such as
insulated gloves, aprons, face shield and sleeves when
handling hot shortening. DO NOT attempt to move any
machine that has hot oil in it. Allow the oil to cool to
room temperature or drain the oil into a suitable
container before moving the fryer.

WARNING
Ensure that the machine can get enough air to keep
the flame burning correctly. If the flame is starved

WARRANTY STATEMENT

Pitco Frialator, Inc. makes the following limited war­ranties 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, computer, burner and
Heat Tube Baffle 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.

5. WARRANTY PROVISIONS - HEAT TUBE
BAFFLES

A. Pitco Frialator, Inc. will warrant the Heat Tube

Baffles 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

3. WARRANTY 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 during

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. WARRANTY PROVISIONS - BURNERS

A. Pitco Frialator, Inc. will warrant the Burners

from defects in material or workmanship for a
period of 10 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.

Table of Contents

WARRANTY STATEMENT

INSTALLATION INSTRUCTIONS.............................................................................

1

Ventilation ..............................................................................................................

1

Quick Disconnect Gas Connection ........................................................................

1

Fuel Supply Line Leak and Pressure Testing .........................................................

2

Clearances ..............................................................................................................

2

Filling the fryer with oil .........................................................................................

2

Chapter 1: HOW DOES IT WORK? ..................................................................................

3

Heating System.......................................................................................................

3

Hi - Limit System ...................................................................................................

3

Filter System...........................................................................................................

3

Hood Relay System ................................................................................................

3

Chapter 2: COMPONENT TROUBLESHOOTING...........................................................

5

Probe.......................................................................................................................

5

Hi Limits.................................................................................................................

5

Drain Valve & Return Valve Switches ...................................................................

5

Transformer............................................................................................................

6

Blower ....................................................................................................................

6

Pressure Switch ......................................................................................................

6

Gas Valve................................................................................................................

6

Fryers......................................................................................................................

7

Filters......................................................................................................................

8

Probes .....................................................................................................................

9

Hi Limits.................................................................................................................

9

Components mounted in the front panel ................................................................

10

Hood & Filter Relays .............................................................................................

10

Control Relays........................................................................................................

10

Circuit Breaker .......................................................................................................

11

Gas Valves..............................................................................................................

11

Proximity Switches.................................................................................................

12

Blowers...................................................................................................................

12

Pressure Switches...................................................................................................

12

Fry Vats ..................................................................................................................

13

Chapter 5: Parts ...................................................................................................................

15

Operational Components........................................................................................

15

Filter .......................................................................................................................

15

Miscellaneous.........................................................................................................

15

Chapter 6: Parts Identification.............................................................................................

17

Chapter 7: Schematics .........................................................................................................

18

A note on Excessive Air Velocities within Hood systems ..................................... 1

Leveling the fryers.................................................................................................. 2

Relays ..................................................................................................................... 5

Chapter 3: TROUBLESHOOTING GUIDE ....................................................................... 7

Chapter 4: COMPONENT CHANGEOUT......................................................................... 9

Computers .............................................................................................................. 9

Burners and Spark Ignitors..................................................................................... 11

Wiring Harnesses ................................................................................................... 16

INSTALLATION INSTRUCTIONS

CAUTION:

This equipment is manufactured for the use on a
particular type of gas and electrical voltage which is
specified on the rating plate located on the inside of
the door.

tional Fire Protection Association, Battery March Park,
Quincy, MA 02269

NOTE: It is recommended that the ventilation system
be cleaned and maintained in accordance with the
procedures laid out in the appropriate Preventa-tive
Maintenance Card.

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 any packing materials
as these will be necessary to make a claim.

Follow these installation instructions carefully. A
proper installation is important for the operation of the
fryers.

In the United States, all installations must conform to
all local and state codes and well as the National Fuel
Gas Code (ANSI 223.1 1992). In Canada, installations
must be made in accordance to Canadian Standard
CAN 1-B 149.1 or .2 "Installation Codes for Gas
Burning Appliances & Equipment."

Electrically operated appliances must be electrically
grounded in accordance with local codes; or in the
absence of local codes, with the National Electric
Code ANSI/NFPA No. 70-1996; in CANADA, with
CSA C22-1 Canadian Electrical Code Part 1.

A note on Excessive Air Velocities within Hood
systems:

Extended recovery times and flame outage problems
may occur if Hood Air Velocities are excessively
high.
The installation of a small baffle may be necessary
if problems occur.

NOTE: Should you experience a power failure, your
fryers will shut off automatically. If this happens, do
not attempt to restart the fryers until the power is
restored.

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

1

The baffle should be installed in the position shown in
the picture, using two self drilling screws.

Quick Disconnect Gas Connection:

Units equipped with casters must be installed with
connectors that comply with the standards for con­nectors for Movable Gas Appliances, ANSI Z21.69­1987, and Addenda Z21.69A-1989. (CAN/CGA -6.16
and CAN/CGA - 6.9.) This connection should

include a quick disconnect device that complies with the
Standard for Quick Disconnect Devices for use with Gas
Fuel, ANSI Z21.41-1989. When installing a quick
disconnect you must also install a means of limiting the
movement of the fryer. This device will prevent the gas
line or quick disconnect from being strained.

Fuel Supply Line Leak and Pressure Testing;

The fuel supply system must be tested before the machine
can be used. If the fuel line is going to be tested at a
pressure greater than (>) 1/2 PSI (3.45 kPa), make sure
that the unit is disconnected from the fuel line. If the fuel
line is going to be tested at a pressure equal to or less than
([) 1/2 PSI (3.45 kPa), the machine can be connected to the
supply but the gas valve must be shut.

Clearances:

WARNING:

Area must be kept clear of all combustible materials.

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.

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.

Leveling the fryers:

Leveling the fryers will help ensure proper operation. To
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 the set screws to lock adjustment.

Filling the fryer with oil:

CAUTION:

Never operate this equipment empty. Always make sure
there is the correct amount of shortening or in the case of
cleaning, water in the tank before turning the unit ON.

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 or left hand sides of the inside of the fry
tank. "C" is the level for Cold shortening and "H" is the level
for Hot shortening.

Maintain a minimum of 24" (61cm) clearance in front of
the fryer to provide for proper operation, maintenance and
servicing.

NOTE: Do not block the area around the bottom or
underneath the fryer. The air required to support the gas
combustion is drawn from the underneath and sides of the
fryer.

A wiring diagram is located in the back of this manual and
inside the fryers.

The control (interlock) voltage for this equipment must be
120 VAC (US & Canada). For other countries please
check the rating plate.

2

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.

Clean the fry tanks using the Boil Out procedure on
Maintenance Card Number 14A

Retain this manual for future reference.

Chapter 1: HOW DOES IT WORK?

The McDonald's Gas 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

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 energize a Relay

(K15) that will turn the Hood system ON.

Computer calls for heat:

The Heat Demand Relay (K1) will energize supplying the

Blower, the Pilot Solenoid on the Gas Valve and the Ignition

Control Modules (El & E2) with power. Both Ignition Control

Modules supply power to the Spark Ignitors. At the same time

one of the Ignition Control Modules (E2) supplies power to

the Gas Cut Off Relay (K6). The Gas Cut Off Relay (K6)
energizes allowing the second Ignition Control Module (El) to

supply power to the normally open Pressure Switch (S9).

When the Blower comes up to speed, which should take a

couple of seconds, the Pressure Switch (S9) will close

allowing 24 VAC to the Main Solenoid of the Gas Valve. This

will also supply the computer with a heat feedback signal.

Since there are two burners in a full vat machine each of the

Ignition Control Modules (El & E2) alternately sends a spark

signal to the Ignitor and tests for a flame sense signal from the
same Ignitor. When a flame sense signal is received it will

cease to send the spark signal and continue to sense flame. If,

after 10 seconds, a flame sense signal has not been established

the Ignition Control Module (El & E2) will "Lock Out" and

cease to run until reenergized. On Split Vat machines the same

power that supplies the computer also supplies 24 VAC to the

normally open Pressure Switch (S9). When the computer en

ergizes the Heat Demand Relay (K1) the Blower will be

supplied with power and come up to speed. At this time the air

pressure from the blower will close the Pressure Switch (S9)

and allow 24 VAC to go to the second set of contacts within

the Heat Demand Relay (K1), since the Heat Demand Relay
(K1) is now closed the Ignition Control Module (El) and Hi

Limit Switch (SI) will receive 24 VAC. If the Hi Limit Switch

(S1)iis NOT tripped it will allow 24 VAC to be supplied to

the Pilot Solenoid of the Gas Valve. The Ignition Control

Module (SI) supplies 24VAC to the Main Solenoid of the Gas

valve. The Ignition Control Module (El) alternately sends a

spark signal to the Ignitor and tests for a flame sense signal

from the same Ignitor. When a flame sense signal is received

it will cease to send the spark signal and continue to sense
flame. If, after 10 seconds, a flame sense signal has not been

established the Ignition Control Module (El) will "Lock Out"

and cease to run until reenergizes.

Hi - Limit System:

When the Hi Limit (SI) trips it causes the power to the Pilot

Solenoid to stop and gas will cease to flow through the gas

valve. This will cause a Lock Out condition and the computer

will show "IGNITION" "FAILURE". The Hi Limit (SI) is an

automatic reset type switch. In order to make the computer

recognize that the Hi Limit (SI) has reset it must be turned

OFF and back ON again.

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.

3