Frymaster 1824/2424G Guía

NON-CE

Frymaster Dean, a member of the Commercial Food Equipment Service Association,

recommends using CFESA Certified Technicians.

PRINTED IN THE USA 24-Hour Service Hotline

1-800-551-8633 DEC 2008

[email protected]

www.frymaster.com

*8196031*

24G Series Flatbottom

Gas Fryers

Service & Parts Manual

Models SCF/SCFC 1824G, 2424G and 1824/2424G

Systems with Built-In Filtration

Please read all sections of this manual and retain for future reference.

This product has been certified as commercial cooking equipment and MUST be installed by

professional personnel as specified. Installation, maintenance and repairs should be performed

by your FRYMASTER DEAN FACTORY AUTHORIZED SERVICE CENTER.

DANGER

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any

other cooking appliance.

DANGER

Instructions explaining procedures to be followed MUST be posted in a prominent location in

the event the operator detects a gas leak. This information can be obtained from the local gas

company or gas supplier.

WARNING

Improper installation, adjustment, 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.

DANGER

Safe and satisfactory operation of your equipment depends on proper installation. Installation

MUST conform with local codes, or in absence of local codes, with the National Fuel Gas Code,

ANSI Z223.1; The Natural Gas Installation Code, CAN/CGA-B149.1; The Propane Installation

Code, CAN/CGA-B149.2; or The latest edition of the National Electric Code, N.F.P.A. 70.

NOTICE

IF, DURING THE WARRANTY PERIOD, THE CUSTOMER USES A PART FOR THIS ENODIS

EQUIPMENT OTHER THAN AN UNMODIFIED NEW OR RECYCLED PART PURCHASED

DIRECTLY FROM FRYMASTER DEAN, OR ANY OF ITS AUTHORIZED SERVICE CENTERS,

AND/OR THE PART BEING USED IS MODIFIED FROM ITS ORIGINAL CONFIGURATION, THIS

WARRANTY WILL BE VOID. FURTHER, FRYMASTER DEAN AND ITS AFFILIATES WILL NOT BE

LIABLE FOR ANY CLAIMS, DAMAGES OR EXPENSES INCURRED BY THE CUSTOMER WHICH

ARISE DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, DUE TO THE INSTALLATION OF

ANY MODIFIED PART AND/OR PART RECEIVED FROM AN UNAUTHORIZED SERVICE CENTER.

DANGER

The crumb tray in fryers equipped with a filter system must be emptied into a fireproof container

at the end of frying operations each day. Some food particles can spontaneously combust if left

soaking in certain shortening material. Additional information can be obtained in the filtration

manual included with the system.

DANGER

The front ledge of the fryer is not a step. Do not stand on the fryer. Serious injury can result

from slips or contact with the hot oil.

WARNING

Drawings and photos used in this manual are intended to illustrate operational, cleaning and

technical procedures and may not conform to on-site management operational procedures.

WARNING

No structural material on the fryer should be altered or removed to accommodate placement of

the fryer under a hood. Questions? Call the Frymaster Dean Service Hotline at 1-800-551-8633.

This equipment is to be installed in compliance with the basic plumbing code of The Building

Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation

Manual of the Food and Drug Administration.

COMPUTERS (WHERE APPLICABLE)

FCC

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:

1) This device may not cause harmful interference, and 2) This device must accept any interference

received, including interference that may cause undesired operation. While this device is a verified Class

A device, it has been shown to meet the Class B limits.

CANADA

This digital apparatus does not exceed the Class A or B limits for radio noise emissions as set out by the

ICES-003 standard of the Canadian Department of Communications.

Cet appareil numerique n’emet pas de bruits radioelectriques depassany les limites de classe A et B

prescrites dans la norme NMB-003 edictee par le Ministre des Communcations du Canada.

DANGER

THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE

CANCER AND/OR BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.

Operation, installation, and servicing of this product could expose you to airborne particles of

glasswool or ceramic fibers, crystalline silica, and/or carbon monoxide. Inhalation of airborne

particles of glasswool or ceramic fibers is known to the State of California to cause cancer.

Inhalation of carbon monoxide is known to the State of California to cause birth defects or other

reproductive harm.

WARNING

Do not bang fry baskets or other utensils on the fryer’s joiner strip. The strip is present to seal

the joint between the fry vessels. Banging fry baskets on the strip to dislodge shortening will

distort the strip, adversely affecting its fit. It is designed for a tight fit and should only be

removed for cleaning.

24G Series Flatbottom Gas Fryers

Service & Parts Manual

TABLE OF CONTENTS

PAGE #

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.7.1

1.7.2

1.7.3

1.7.4

1.7.5

1.7.6

1.8

1.8.1

1.8.2

1.8.3

1.8.4

1.8.5

1.9

1.9.1

1.9.2

1.9.3

1.10

1.10.1

1.10.2

1.10.3

1.10.4

1.10.5

1.10.6

1.10.7

1.10.8

1.10.9

1.10.10

SERVICE PROCEDURES

Functional Description

Accessing Fryers for Servicing

Cleaning Gas Valve Vent Tube

Adjusting Burner Manifold Gas Pressure

Adjusting Pilot Flame

Calibrating the Thermatron Temperature Controller

Replacing Fryer Components

Remove/Replace Temperature Probe or High-Limit Thermostat

Removing /Replacing Rocker Switches

Replacing the Gas Valve

Replacing the Pilot Assembly or Direct Spark Ignitor

Removing/Replacing Blower Assembly or Air Prover Switch

Replacing the Frypot

Troubleshooting and Problem Isolation

Ignition Failures

Improper Burner Functioning

Improper Temperature Control

Filtration Problems

Leakage

Troubleshooting Guides

Pilot Burner Malfunctions

Main Burner Malfunctions

Indicator Lights

Wiring Diagrams

24G Series Single Fryers, Non-CE without Boil-Out Switch

24G Series Single Fryers, Non-CE with Boil-Out Switch

24GTI with Drain Safety Switch, and Boil-Out Option Enabled – LJS

24GTI with Drain Safety Switch, and Boil-Out Option Enabled – 120V non-LJS

24GTI with Drain Safety Switch, and Boil-Out Option Enabled – 250V non-LJS

24GTI with Drain Safety Switch, and Boil-Out Option Disabled – KFC

24GTI with Drain Safety Switch, and Boil-Out Option Disabled – non-KFC

24G Series Single Fryers, CE Approved

Wiring, Standing Pilot - SCFC Models

24GTI Oil Return/Filter System

1–1

1–5

1–6

1–7

1–9

1–11

1–12

1–13

1–15

1–19

1–20

1–21

1–23

1–25

1–26

1–27

1–28

1–29

1–30

1–31

1–32

1–33

1–34

1–35

1–36

1–37

1–38

24G Series Flatbottom Gas Fryers

Service & Parts Manual

TABLE OF CONTENTS (cont.)

PAGE #

2.1

2.2

2.3

2.4

2.4.1

2.4.2

2.4.3

2.4.4

2.4.5

2.4.6

2.5

2.5.1

2.5.2

2.5.3

2.5.4

2.5.5

2.5.6

2.6

2.7

2.8

PARTS LIST

Blower Assembly and Combustion Air

Burner Manifold and Related Components

Flue Caps, Top Caps, and Related Components

Common Cabinet Components (SCFC Models)

Cabinetry

Door Assemblies and Component Parts

Control Panels, Wireways, and Related Components

Oil Return and Suction Manifolds

Filter Unit

Frypot, Drain, and Oil Return Components

Previous Style (SCF Models)

Cabinetry

Door Assemblies and Component Parts

Control Panels, Wireways, and Related Components

Oil Return and Suction Manifolds

Filter Unit

Frypot, Drain, and Oil Return Components

Drain Valve and Components

Wiring Connectors, Pin Terminals, and Power Cords

Screws, Nuts, and Fasteners

2–1

2–2

2–4

2–6

2–8

2–9

2–11

2–13

2–14

2–16

2–18

2–19

2–21

2–24

2–25

2–27

2–28

2–29

APPENDIX: ND90 Built-in Filter System 2–30

24G SERIES FLATBOTTOM GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1-1

1.1 Functional Description

24G Series Flatbottom gas fryers contain a welded steel frypot (mild steel) with heat-transfer ducting

on the frypot bottom for efficient heating of oil without scorching. A draft inducer draws air over

the burners for combustion. Air movement directs the combustion products back and forth across

the frypot bottom by means of a set of baffles, transferring the heat evenly. Cold air is prevented

from entering the combustion chamber and cooling the oil during the coasting cycle.

Flames originate from orifices in three tubular burners positioned beneath the frypot. The diameter

of the orifices differs for Natural (CE:G20/G25) and LP (CE:G31) gas as indicated in the table

below.

NON-CE (Altitudes of 2000 feet or less)

EQUIPMENT

PRESSURE

MODEL INPUT

(BTU) GAS TYPE ORIFICE

[DRILL SIZE (MM)] ORIFICE

PART # QTY MBAR INCH W.C.

1824/2424G 120 NAT

LP #34 (2.82)

#50 (1.78) 810-2051

810-2317 3

3 10

27.5 4

CE ONLY (Altitudes of 2000 feet or less)

EQUIPMENT

PRESSURE

MODEL INPUT

(kW) GAS TYPE ORIFICE

(MM) ORIFICE

PART # QTY MBAR INCH W.C.

1824/2424G 30,0

(88,000

BTU)

G20

G25

G31

2,50

1,60

810-2628

810-2317

14,5

21,0

31,0

5,8

8,4

12,44

An electromechanical gas valve regulates gas flow to the manifold. 24G Series Flatbottom gas

fryers are equipped with either a 120-volt valve system (standing pilot) or a 24-volt valve system

(electronic ignition or CE standing pilot). Units may be configured with either a pilot ignition system

(standing pilot) or an electronic ignition system (direct spark ignition).

24G SERIES FLATBOTTOM GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1-2

Pilot System Configuration

The pilot system is the pilot orifice, pilot hood, and a thermocouple. The pilot serves two purposes.

The first is to light the burner, the second is to heat the thermocouple. In operation, the

thermocouple is in contact with the pilot flame and generates millivolts. The millivolt output

energizes the gas valve pilot coil, which in turn opens the pilot valve. If the pilot flame is

extinguished, voltage is lost to the gas valve pilot coil and the pilot valve closes. The gas valve is

constructed so that the main valve will not open if the pilot valve is not open. The pilot flame must

be manually lit when the fryer is first placed into operation. A separate circuit, activated by the fryer

ON/OFF switch, provides voltage through the Thermatron temperature controller to the gas valve

main coil, which opens the main valve.

Thermatron Temperature

Controller

High-Limit

Thermostat

Line Voltage

The Pilot System

120V

MELT CYCLE DISABLE

AC1

AC2 3A 2A

789

EXT POT PROBE

10 11

COM

RELAY

12 13

Thermocouple

Pilot Coil

Main Coil

Gas

Valve

Pilot

ON/

OFF

Switch

Electronic Ignition Configuration

In units configured for electronic ignition, an ignition module connected to an ignitor assembly

replaces the pilot system. The ignition module performs three important functions: it provides an

ignition spark, supplies voltage to the gas valve, and proofs the burner flame.

The module contains a time delay circuit and a coil that activates the gas valve. The ignitor

assembly consists of a spark plug and a flame sensor element.

At start-up the ON/OFF switch is placed in the "ON" position, supplying 115 VAC or 230 VAC,

according to system configuration, to the Thermatron interface board. The voltage is stepped down

via transformer to 24 VAC before entering the ignition module. If resistance in the temperature

probe indicates the temperature in the frypot is below 150°F (66°C), the current flows through a melt

24G SERIES FLATBOTTOM GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1-3

cycle circuit where a switch alternately closes for approximately 4 seconds and opens for

approximately 20 seconds. If the temperature is 150°F (66°C) or above, the current flows through a

heat circuit, bypassing the timer switch. In either case, current is supplied to the other leg of the heat

relay coil, which then closes an electronic switch in the 24 VAC circuit to provide current to the

ignition module.

Circuitry in the ignition module sends 24 VAC current to the gas valve via a normally closed high-

limit switch and a drain safety switch. Simultaneously, the module causes the ignitor to spark for up

to 11 seconds to light the burner flame. A flame sensor verifies that the burner is lit by measuring

the flow of microamps through the flame. If the burner does not light (or is extinguished), current to

the ignition module is interrupted, preventing the main valve from opening, and the ignition module

"locks out" until the power switch is turned "OFF", then back "ON".

A temperature probe monitors the temperature in the frypot. When the programmed setpoint

temperature is reached, resistance in the probe causes the heat cycle circuitry in the controller to

interrupt current flow through the heat relay. This in turn interrupts the 24 VAC to the ignition

module, resulting in closure of the gas valve.

Control Options

24G Series Flatbottom gas fryers are equipped with Thermatron temperature controller. The fryer is

turned on and off by means of a rocker switch and the temperature is set by adjusting a

potentiometer. The Thermatron board is located in the wireway box behind the control panel, or in a

component box inside the cabinet (depending on fryer configuration).

The Thermatron temperature controller operates by comparing resistance between the potentiometer

setting and the temperature probe. If the resistance values don’t match, an on-board relay energizes,

sending voltage to the gas valve that supplies fuel to the burners. When the resistance values are

equal, the on-board relay de-energizes, interrupting voltage to the gas valve, which stops the fuel

flow.

Depending on the system configuration and destination, 24VAC, 115VAC or 208/230VAC

controller boards are used.

24G SERIES FLATBOTTOM GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1-4

MELT CYCLE DISABLE

AC1

AC2 3A 2A

789

EXT POT PROBE

10 11

COM

RELAY

12 13

Not used

Line voltage enters the interface board at terminals 1 and 3. The temperature controls

(potentiometer) are connected to terminals 7, 8 and 9. The sensor probe circuit is connected to

terminals 10 and 11. The high-limit and gas valve routes through terminal 12. Terminals 2 and 13

are jumped out. Terminals 5 and 6 are the melt-cycle disable circuit. The melt cycle is enabled

unless terminals 5 and 6 are jumped out.

Thermatron Controller Board

24G SERIES FLATBOTTOM GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1-5

Safety Components

All 24G Series Flatbottom gas fryers are equipped with a high-limit thermostat. In the event that the

fryer fails to properly control the oil temperature, the high-limit thermostat prevents the fryer from

overheating to flash point. The high-limit thermostat acts as a normally closed power switch that

opens when exposed to temperatures above 410°F [(210°C)- CE] to 435°F [(224°C)- Non-CE]. CE

and non-CE high-limits are not interchangeable.

Frying systems with built-in filtration are equipped with drain microswitches that disable the fryer if

the drain valves are not completely closed. Opening a drain valve (i.e. filtering or draining the fryer)

automatically opens the reset switch circuit. The drain valve must be fully closed prior to resetting

the safety switch.

1.2 Accessing Fryers for Servicing

DANGER

Moving a fryer filled with cooking oil/shortening may cause spilling or splattering of

the hot liquid. Follow the draining instructions included with the fryer before

attempting to relocate a fryer for servicing.

NOTE: Perform the following only if the fryer cannot be serviced in its installed location. Some of

the following service procedures require the fryer to be connected to the gas and/or electrical supply.

1. Shut off the gas supply to the unit. Unplug the power cords. Remove any attached restraining

devices.

2. Disconnect the unit from the gas supply.

3. Relocate the fryer for service accessibility.

4. After servicing is complete, reconnect the unit to the gas supply, reattach restraining devices, and

plug in the electrical cords.

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