Garland M42 M42R M42T M42S User manual

High E ciency Radiant Char-Broiler

models

HEEGM24CL

HEEGM36CL

HEEGM48CL

HEEGM60CL

SERVICE MANUAL

Please read all sections of this manual and retain for future

reference.

This manual is written for the specific model(s) listed on the

front cover. Unless specified, this manual should not be used for

any other make or model of appliance.

Garland reserves the right to change product specifications

without notices and accepts no liability for any inaccuracies,

errors or omissions contained herein.

Garland Commercial Ranges, Ltd.

1177 Kamato Road, Mississauga,

Ontario, CANADA L4W 1X4

T. 1-905-624-0260

F. 1-905-624-5669

www.garland-group.com

USA Sales, Parts and Service 1-800-424-2411

Canadian Sales 1-888-442-7526

Canada or USA Parts/Service 1-800-427-6668

Page 2 | HEEGM Service Manual part# 4532502 (Rev 0)

SAFETY ALERT SYMBOLS

The following safety alert symbols and signal words indicate important safety information

throughout this book. Read all safety messages carefully and implement relevant safety

precautions at all times.

This safety symbol alerts you to a hazardous situation that

WILL or COULD cause serious bodily harm or death. When

this symbol appears, be alert and implement relevant safety

precautions.

DANGER

This symbol and signal word alert a hazardous situation, which

if not avoided, WILL cause serious physical injury or death. The

relevant safety precautions MUST be implemented at all times.

WARNING

This symbol and signal word alert a hazardous situation, which

if not avoided, COULD cause serious physical injury or death.

The relevant safety precautions MUST be implemented at all

times.

HIGH VOLTAGE

This high voltage symbol and signal words indicate a serious

risk of bodily harm from an electric shock.

FIRE OR EXPLOSION

This fire or explosion symbol and signal words indicate a

serious risk of bodily harm or property damage from gas

explosion or fire.

This safety symbol conveys action that you should take to avoid

hazards. The type of mandatory action is indicated with a white

image on the blue circular background. The corresponding

safety message will follow this symbol.

IMPORTANT

This symbol indicates important information.

Page 3 | HEEGM Service Manual part# 4532502 (Rev 0)

CONTENTS

1 SAFETY REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Warnings and Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2 RATING PLATE, SERIAL#, MODEL# INFORMATION. . . . . . . . . . . . . . . . . . . 6

2.1 Rating Plate Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2.2 Serial Number (Year/Month Information) . . . . . . . . . . . . . . . . . . . . . . . . .6

2.3 Model Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3 TECHNICAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Gas Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.2 Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.3 Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

4 UNIT CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Important Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

4.2 Major Components - Quantity Comparison . . . . . . . . . . . . . . . . . . . . . . .8

4.3 Major Components Illustrated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

5 TROUBLESHOOTING GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1 Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

5.2 Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

5.3 Problems & Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

6 REMOVE, INSTALL AND ADJUST COMPONENTS. . . . . . . . . . . . . . . . . . . . 16

6.1 Knob . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

6.2 Valve Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

6.3 Side Leg Panels - Left / Right . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.4 Gas Pressure Regulator & Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . .18

6.5 Burner and Air Shutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.6 Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

6.7 Ori ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.8 Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

6.9 Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

6.10 Ignition Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

6.11 ON-OFF Switch & Main Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . .31

6.12 Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

7 WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

HEEGM24CL 120VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

HEEGM24CL 240VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

HEEGM36CL 120VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

HEEGM36CL 240VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

HEEGM48CL 120VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

HEEGM48CL 240VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

HEEGM60CL 120VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

HEEGM60CL 240VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

8 RELATED DOCUMENTS & REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . 42

Page 4 | HEEGM Service Manual part# 4532502 (Rev 0)

1 SAFETY REQUIREMENTS

1.1 Warnings and Important Information

DANGER

Before servicing the equipment, shut off the gas supply at the main

shut-off valve and remove the unit from electrical supply.

WARNING

On completion of any service work, test for gas leaks before returning

the equipment into service.

WARNING

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, maintenance, and service instructions thoroughly before

installing or servicing this equipment.

WARNING

This product contains chemicals known to the State of California

to cause cancer and/or birth defects or other reproductive harm.

Installation and servicing of this product could expose you to airborne

particles of glass wool/ceramic fibers. Inhalation of airborne particles

of glass wool/ceramic fibers is known to the State of California to cause

cancer. Operation of this product could expose you to carbon monoxide

if not adjusted properly. Inhalation of carbon monoxide is known to the

State of California to cause birth defects or other reproductive harm.

WARNING

Do not obstruct the flow of combustion and ventilation air.

WARNING

Ensure this unit is connected to the type of gas shown on the rating

plate. Operating this unit with the wrong gas type can result in

abnormal performance, property damage, injury or death.

IMPORTANT

Garland / U.S. Range products are not approved or authorized for home

or residential use, but are intended for commercial applications only.

Garland / U.S. Range will not provide service, warranty, maintenance or

support of any kind other than in commercial applications.

Page 5 | HEEGM Service Manual part# 4532502 (Rev 0)

1.1 Warnings and Important Information (cont.)

IMPORTANT

For Your Safety: Post in a prominent location, instructions to be followed

if a user smells gas. This information shall be obtained by consulting

your local gas supplier.

IMPORTANT

In the Commonwealth of Massachusetts this product must be installed

by a licensed plumber or gas fitter.

IMPORTANT

Users are cautioned that maintenance and repairs must be performed

by a Garland authorized service agent using genuine Garland

replacement parts. Garland will have no obligation with respect to any

product that has been improperly installed, adjusted, operated or not

maintained in accordance with national and local codes or installation

instructions provided with the product, or any product that has its serial

number defaced, obliterated or removed, or which has been modified

or repaired using unauthorized parts or by unauthorized service agents.

For a list of Garland authorized service agents, please refer to the

Garland web site @www.Garland-Group.com.

IMPORTANT

In the United States, installation of this appliance must conform to the

National Fuel Gas Code ANSI Z223.1, or latest edition, NFPA No.54 –

latest edition or local code to assure safe and efficient operation.

IMPORTANT

In Canada, installation of this appliance must comply with CSA B149.1

and local codes.

IMPORTANT

Many local codes exist and it is the responsibility of the owner and

installer to comply with those codes.

IMPORTANT

To comply with NSF requirements, the unit should be sealed to a non-

combustible mounting surface with silicone.

1 SAFETY REQUIREMENTS CONT.

Page 6 | HEEGM Service Manual part# 4532502 (Rev 0)

2 RATING PLATE, SERIAL#, MODEL# INFORMATION

2.1 Rating Plate Location

The rating plate is attached to the inside face of the left leg as shown below. Information on

this plate includes: the model number, serial number, gas type, gas pressure, voltage, and if

applicable, clearance requirements for the unit. Remove the grease tray if some of the information

is obstructed.

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95*7,1.;

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/588;

95*/;2;.

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MISSISSAUGA, ONT., CANADA

0;2--5.

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NSF

GARLAND COMMERCIAL RANGES LTD.,

2.2 Serial Number (Year/Month Information)

The serial number is 13 digits long and is stamped on the Rating Plate.

12 11 1001 00668

Sequential Number

Factory Code

Month

Year

2.3 Model Code

Model code can be found on the rating plate. Four HEEGM models are available:

• HEEGM24CL - 24” (610mm)

• HEEGM36CL - 34” (864mm)

• HEEGM48CL - 48” (1219mm)

• HEEGM60CL - 58” (1473mm)

Page 7 | HEEGM Service Manual part# 4532502 (Rev 0)

3 TECHNICAL SPECIFICATIONS

3.1 Gas Requirements

Model No. Natural (total BTU)* Propane (total BTU)* No. Of Burners

HEEGM24CL 58,000 52,000 4

HEEGM36CL 87,000 78,000 6

HEEGM48CL 130,500 117,000 9

HEEGM60CL 159,500 143,000 11

*Total BTU data is based on the manifold operating pressure specified below, in section 3.2, and

applies to installations up to 2000ft (610m).

3.2 Manifold Pressure

Data provided for installations UP TO 2000ft (610m)

Gas inlet pipe is 3/4” NPT on all models.

Model Manifold Operating Pressure

WC (Mbar)

Manifold Supply Pressure

WC (Mbar)

Natural Gas Propane Natural Gas Propane

ALL Models 4.5” (11.2) 10.0” (25.0) 7.0” (17.4) 11.0” (27.5)

3.3 Electrical Requirements

Model Voltage (V) Frequency (Hz) Current (A) Cord/Plug

HEEGM-24/36-CL

120 50-60 0.10 NEMA 5-15P

220-240 50-60 0.05 not supplied

HEEGM-48/60-CL

120 50-60 0.22 NEMA 5-15P

220-240 50-60 0.11 not supplied

Page 8 | HEEGM Service Manual part# 4532502 (Rev 0)

4 UNIT CONFIGURATION

The components for this compact model are carefully designed and organized to provide high

efficiency and safe operation. You will find all the major components illustrated in this section.

For a list of parts and part numbers, please refer to the HEEGM Parts List (see section “8 Related

Documents”), available on our website @ www.Garland-Group.com

4.1 Important Features

The features listed below are referenced in the illustrations in “4.1.2 Major Components”.

Ignition wires are protected by a metal wire-way and high temperature silicone sleeve.

The flue at the back of the unit prevents overheating of the unit and its components.

The removable side shields contribute to even temperature and easy cleaning. The side

shields also prevent the cooking grates, when placed in the elevated position, from sliding

off the side of the unit.

Solenoid valves connected in series, provide redundancy and ensure safe operation.

Left/Right Side Leg Panels are installed using a tab and slot method at the back, which can be

dislodged and slid out easily when servicing the unit.

Additional Main Power Switch for 220-240V units (see figure below).

Burners

ON/OFF

Main Power

ON/OFF

120V Single Switch 120V Double Switch 220-240V Single Switch 220-240V Double Switch

24”, 36” models 48”, 60” models 24”, 36” models 48”, 60” models

4.2 Major Components - Quantity Comparison

Model No. Burner Manifold

Assembly

Solenoid

Gas Valve

Ignition Module Burner ON/OFF

Switch

4-Spark 6-Spark

HEEGM24CL 4 1 2 1 -- 1

HEEGM36CL 61 2 -- 1 1

HEEGM48CL 92 4 112

HEEGM60CL 11 2 4 -- 2 2

Page 9 | HEEGM Service Manual part# 4532502 (Rev 0)

4 UNIT CONFIGURATION CONT.

4.3 Major Components Illustrated

Male/Female

Connectors,

to Main Power

Supply

Burners

ON/OFF Switch

Hi-Low Gas Valve,

Valve Extension,

KƌŝĮĐĞ

Knob (High/Low)

Wire Channel

Grease Chute

Test Spigot,

Front Manifold

x1 for 24” / 36” model

x2 for 48” / 60” model

Right Side Leg Panel

Electrode

* BX Cable Not Shown

Burner

Radiant

ŝƌĂŋĞ

&ĂũŝƚĂ'ƌĂƚĞ;KƉƟŽŶͿ

Reversible Grate

/ŐŶŝƟŽŶDŽĚƵůĞ

(4 Spark / 6-Spark)

Terminal

Block

(240V Only)

Transformer

(240V Only)

Solenoid Gas Valve

x2 for 24”/ 36” model

x4 for 48”/ 60” model

Side Manifold

x1 for 24”/ 36” model

x2 for 48”/ 60” model

Gas Pressure

Regulator

Main Power Supply

(120V Only)

>ĞŌ^ŝĚĞ>ĞŐ

Panel Removed

3 3

Page 10 | HEEGM Service Manual part# 4532502 (Rev 0)

5 TROUBLESHOOTING GUIDE

5.1 Sequence of Operation

This section helps you to get familiar with the mechanical and electrical controls, and the

operations of the HEEGM broiler. For a comprehensive overview of the HEEGM operation, please

use this section together with the Wiring Diagrams in section “7 Wiring Diagrams”.

To find out where the major components are installed, see “4.1.2 Major Components”.

Operation Sequence:

The sequence numbers are referenced in the illustrations on the following two pages.

Turn on the gas and electrical controls using the burners ON/OFF switch(es).

220-240V models have a Main Power Switch, which has to be turned on before the ON/OFF

switch(es) for the burners can be energized.

Burners

ON/OFF

Main Power

ON/OFF

120V Single Switch 120V Double Switch 220-240V Single Switch 220-240V Double Switch

24”, 36” models 48”, 60” models 24”, 36” models 48”, 60” models

A 48” or 60” model has TWO burner control switches. The LEFT and RIGHT switches work

independently. See illustrations on page 12.

48” Model: The LEFT Switch controls burners# 1-4. The RIGHT Switch controls burners# 5-9.

60” Model: The LEFT Switch controls burners# 1-6. The RIGHT Switch controls burners# 7-11.

When switched on, electrical power is routed to the solenoid gas valves. The solenoid valves

open and distribute gas, through the manifold(s) to each mechanical Hi-Low gas valve.

The mechanical Hi-Low GAS VALVES have NO OFF POSITION; they ARE ALWAYS OPEN.

All units are factory set for optimal flame size. Each burner is evaluated for full flame kernel

combustion appearance through adjustment of the burner air shutter (see “6.5 Burner and Air

Shutter”).

When switched on, electrical power is also routed to the ignition module(s), which supplies

high voltage energy to each electrical ignitor, generating a spark. Each ignitor will continue to

spark until a flame is established at all burners.

Once flame has been established at all burners, the sparking will stop. However,

the module will continue to monitor and sense each flame. If the flame at any burner is

extinguished, the ignition module will re-start the spark cycle.

If all burners have come on, we can conclude that the unit is working properly. All port flame

kernels should exhibit complete combustion — pure blue flame with no or minimum yellow.

If the appearance of the flame is abnormal, adjust the burner air shutter (see “6.5 Burner and

Air Shutter”).

Page 11 | HEEGM Service Manual part# 4532502 (Rev 0)

5 TROUBLE SHOOTING GUIDE CONT.

Operation Sequence Illustrated - HEEGM24CL, HEEGM36CL

The illustrations below provide simplified views of the relationships among the major

components: ignition modules, electrodes, solenoid vales, manifolds, switches, and burners.

Burner#

Top View of Burners

Burners ON/OFF

Switch

/ŐŶŝƟŽŶDŽĚƵůĞ

4-Spark

^ŽůĞŶŽŝĚsĂůǀĞƐ

DĂŶŝĨŽůĚ

312 4

6-Spark

312 456

ƵƌŶĞƌƐϭͲϰŽŶƚƌŽůƐ

gas

DĂŝŶWŽǁĞƌKEͬK&&^ǁŝƚĐŚ

;ϮϰϬsKŶůǇͿ

HEEGM24CL

HEEGM36CL

Burner#

Top View of Burners

Burners ON/OFF

Switch

/ŐŶŝƟŽŶDŽĚƵůĞ

^ŽůĞŶŽŝĚsĂůǀĞƐ

DĂŶŝĨŽůĚ

ƵƌŶĞƌƐϭͲϲŽŶƚƌŽůƐ

gas

DĂŝŶWŽǁĞƌKEͬK&&^ǁŝƚĐŚ

;ϮϰϬsKŶůǇͿ

Transformer

;ϮϰϬsKŶůǇͿ

Transformer

;ϮϰϬsKŶůǇͿ

Page 12 | HEEGM Service Manual part# 4532502 (Rev 0)

5 TROUBLE SHOOTING GUIDE CONT.

Operation Sequence Illustrated (cont.) - HEEGM48CL, HEEGM60CL

Burner#

312 4 56789

Top View of Burners

>ĞŌ

Switch

Right

Switch

Solenoid Valves

Inner Manifold

Outer Manifold

312 456 789

Top View of Burners

/ŐŶŝƟŽŶ

Modules

Burner#

Inner Manifold

Outer Manifold

>ĞŌ

Switch

Right

Switch

Burners 1-4 Controls

Burners 5-9 Controls

Burners 1-6 Controls

Burners 7-11 Controls

gas

Main Power

ON/OFF Switch (240V Only)

HEEGM48CL

gas

HEEGM60CL

gas

Transformer

(240V Only)

6-Spark

4-Spark

6-Spark

Main Power

ON/OFF Switch (240V Only)

Transformer

(240V Only)

Solenoid Valves

/ŐŶŝƟŽŶ

Modules

Page 13 | HEEGM Service Manual part# 4532502 (Rev 0)

5 TROUBLE SHOOTING GUIDE CONT.

5.2 Troubleshooting Flowchart

Turn on

switch

Is switch

light on?

Start 120V

Yes

Is unit

sparking?

Is there

power at the

module?

Replace

module

240V

120V

Yes

Check

switch

Check

transformer

faulty?

Yes

Replace

transformer

Yes

Check for gas

at manifold

spigot

Is gas

present?

Yes

Check all

solenoids

Turn on main

power switch

Is main power

switch light

on?

Check main

power switch

Is main power

switch faulty?

Visually

confirm

spark at

electrodes?

Yes

Check for wire

short at module

or electrodes

Start 240V

Yes

Replace main

power switch

Yes

Is switch

faulty?

Replace

switch

Yes

Shutdown &

return to start

Ensure power is

supplied to the

unit

Check

switch

240V

120V

Page 14 | HEEGM Service Manual part# 4532502 (Rev 0)

5 TROUBLE SHOOTING GUIDE CONT.

5.3 Problems & Evaluation

The following table describes a number of common symptoms and possible causes. Use this table

together with section 5.2 Troubleshooting Flowchart for problem analysis.

SYMPTOM POSSIBLE CAUSE EVALUATION

Burner flame soft – lazy

tip, yellow.

Not enough air mixing with gas.

May need to adjust burner air

shutter to increase air flow.

Incorrect gas pressure.

Confirm gas pressure to Rating

Plate.

Flames lift off burner

ports.

Too much air mixing with gas.

May need to adjust burner air

shutter to reduce air flow.

Flashes back in burner.

Incorrect gas pressure.

Confirm gas pressure to Rating

Plate.

“Pop’s” excessively

when turned off.

Delayed Ignition or

Burner will not ignite

Burner ports plugged. Examine burner.

Electrode out of position or

damaged.

Examine electrodes visually.

Gas valve seized or restriction in

valve or orifice.

Check gas valve, orifice.

Ignition module failed.

Verify module is sparking (24”/36”

Units).

Verify module is sparking on

the same side as gas is flowing

(48”/60” Units).

Incorrect gas pressure.

Confirm gas pressure to Rating

Plate.

Unit over gassed or incorrect

orifice size.

Check gas pressure and orifice

size.

Temperature too hot,

too much heat, over-

fired

Too much fuel to burners.

Verify gas type for unit and

regulator.

Check regulator pressure.

Temperature variation

Unit is extremely out of level.

Check if unit is leveled.

Check if grease pooling.

Abnormal atmospheric pressure/

air-cross-currents / excessive

drafts / negative air pressure in

kitchen.

Evaluate the air movement,

the ventilation system, and the

location of the unit in the kitchen.

Temperature too low,

too little heat, under-

fired

Not enough fuel to burners.

Verify gas type for unit and

regulator.

Check regulator pressure.

Side shield not installed. Check removable side shields.

Blocked gas valve (particularly

on LOW setting).

Evaluate Burner flames.

Excessive draft. Evaluate the ventilation system.

Page 15 | HEEGM Service Manual part# 4532502 (Rev 0)

5 TROUBLE SHOOTING GUIDE CONT.

5.3 Problems & Evaluation (cont.)

SYMPTOM POSSIBLE CAUSE EVALUATION

Weak ignition sparks

Damaged spark ignitor.

Inspect ignitor and check spark

gap for min 0.125”(1/8”) - max

0.160”(5/32”) opening.

Ignition Module Problem. Replace Module

Page 16 | HEEGM Service Manual part# 4532502 (Rev 0)

6 REMOVE, INSTALL AND ADJUST COMPONENTS

6.1 Knob

Each knob is connected to the gas valve extension

and is secured with a set screw on the left side.

Use a flat screwdriver to loosen or tighten the set

screw.

Set Screw

Valve Extension

Knob

6.2 Valve Panel

Remove the valve panel to gain access to:

• wire channel, ignition wires, and electrodes

• front manifold, gas valves, and spigots

• grease chute

• solenoid wires in B/X cable

IMPORTANT

To remove the side manifolds and solenoid valves, you will need to

remove BOTH the valve panel AND the Left Side Leg Panel.

To remove the valve panel:

WARNING

Remove all power supplies to the unit before opening panels for

servicing.

1. Take off the knobs.

2. Remove screws from the four corners as shown.

3. 48” and 60” Only: remove two screws at the bottom as shown.

4. 60” Only: take off the condiment rail support bracket as well.

A 60” Model Shown

View Bracket from

Underneath

Page 17 | HEEGM Service Manual part# 4532502 (Rev 0)

6 COMPONENTS CONT.

6.3 Side Leg Panels - Left / Right

Remove the side leg panels to gain access to:

• switch(es), wiring, and ignition module(s) (R-SIDE)

• transformer and terminal block (240V unit) (R-SIDE)

• wire connections to main power (R-SIDE)

• side manifold and solenoids (L-SIDE)

• connections to the gas pressure regulator (L-SIDE)

To remove a side leg panel:

WARNING

Remove all power supplies to the unit before opening panels for

servicing.

IMPORTANT

When removing the RIGHT Side Leg Panel, ensure you slide the panel out gently

without disconnecting any wire connections accidentally.

IMPORTANT

To avoid pinching any wire, tuck all the wires safely away before sliding the panel

back in.

1. Take out the grease pan(s).

2. Remove the 2 screws, at the front, on the inside face of the foot

3. To dislodge the panel from the tabs at the back, pull the panel straight forward.

A 36” Model Shown

Page 18 | HEEGM Service Manual part# 4532502 (Rev 0)

6 COMPONENTS CONT.

6.4 Gas Pressure Regulator & Gas Pressure

6.4.1 General Information

Gas pressure regulators have two main

purposes: to reduce supply main pressure to safe

operating pressures of connected appliances;

and to maintain constant downstream pressure,

regardless of changes in the gas flow or

upstream pressure variations.

Basics Of A Gas Pressure Regulator

Inlet

Outlet

Atmospheric

Removable Seal Cap

Vent

Adjustment (Screw)

Loading Element

(Spring)

Measuring Element

(Diaphragm)

Restricting Element

(Valve Disk and Seat)

IMPORTANT

There is a directional requirement for

gas pressure regulator. Ensure the

gas flows throw the regulator in the

correct direction.

IMPORTANT

Gas service suppliers usually supply gas pressure higher than the safe

operating pressures of connected appliances. Always refer to the rating

plates of appliance for the actual manifold pressure required.

6.4.2 HEEGM Gas Regulator Specific Information

• The regulator supplied with the unit is rated for a maximum of ½ PSI (14” WC, 3.45kPa). If the

gas supply line pressure exceeds this maximum, a step down regulator is required and must be

installed in accordance with local codes.

• The red air-vent cap is part of the regulator and should not be removed, unless local codes

require external venting. If external venting is required, install in accordance with local codes.

• The pipe size is ¾” (19.05mm) NPT for all models.

• To ensure optimal operation of this unit, it is recommended that the dynamic gas supply

pressure into the appliance regulator is a minimum of 1” WC higher than the pressure stated

on the rating plate.

6.4.3 Gas Regulator and Gas Pressure Adjustments

Problem with gas regulator and pressure would affect temperature and performance of the unit.

It is important to check if the problem is caused by defective parts, improper connections, or main

supply.

WARNING

Prior to replacing the regulator, disconnect electrical power and shut off

main gas supply to the unit.

DANGER

Be sure to check for gas leaks after installing a new regulator. Check all

gas connections for leaks using a soap solution. Do not use an open

flame to check for leaks.

Page 19 | HEEGM Service Manual part# 4532502 (Rev 0)

6 COMPONENTS CONT.

To check manifold pressure and adjust regulator

IMPORTANT When adjusting gas pressure, all gas utilizing equipment should be

on during adjustments. This will ensure burners are getting correct gas pressures

during a system load.

FOR HEEGM 24” & 36” UNITS

1. Check the pressure value on the unit’s rating plate: 4.5” WC (Natural); 10” WC (Propane).

2. Remove knobs and the valve panel (see sections 6.1 and 6.2).

WARNING Remove power supply to the unit before opening panels for servicing.

3. Connect a manometer to the test spigot on the manifold.

4. Restore power supply to the unit. Then turn on the unit and set ALL the burners to HIGH.

5. Check the manometer reading:

• If the manometer reading matches the pressure value stated on the rating plate, then no

adjustment is necessary.

• If the manometer reading does not match the pressure value, adjust the regulator pressure

by rotating the pressure adjustment screw on the regulator. See illustration in “6.4.1

General Information”.

• To increase pressure, turn the adjustment screw clockwise.

• To decrease pressure, turn the screw counter-clockwise.

FOR HEEGM 48” & 60” UNITS

1. Check the pressure value on the unit’s rating plate: 4.5” WC (Natural); 10” WC (Propane).

2. Remove knobs and the valve panel (see sections 6.1 and 6.2).

WARNING Remove power supply to the unit before opening panels for servicing.

3. Connect a manometer to the test spigot on the LEFT manifold, which controls the set of

burners on the left side (burners 1-4 on 48”; 1 - 6 on 60”). See illustrations in “5.1 Sequence of

Operation” or the Wiring Diagrams in section “7 Wiring Diagrams”.

4. Restore power supply to the unit. Then turn on the LEFT SIDE of the unit ONLY (use the LEFT

SWITCH) and set the burners to HIGH.

5. Check the manometer reading:

• If the manometer reading matches the pressure value stated on the rating plate, then no

adjustment is necessary.

• If the manometer reading does not match the pressure value, adjust the regulator pressure

by rotating the pressure adjustment screw on the regulator. See illustration in “6.4.1

General Information”.

• To increase pressure, turn the adjustment screw clockwise.

• To decrease pressure, turn the screw counter-clockwise.

Page 20 | HEEGM Service Manual part# 4532502 (Rev 0)

6 COMPONENTS CONT.

6.5 Burner and Air Shutter

The HEEGM broiler is made up of long gas burners with various sized ports, covered by cast iron

radiants. Stainless steel air baffles are anchored to the bottom of the burners with cotter pins. See

section “4 Unit Configuration”.

Air Baffles under the burner direct heat upward for efficiency. Note that the left, right, and middle

secondary baffles are all shaped differently. When ordering new parts, please refer to the HEEGM

parts list for details (see “8 Related Documents”).

Each cast-iron burner is individually controlled by a manual High-Low Gas Valve, with NO OFF

position.

6.5.1 Burner BTU Output

Each cast-iron burner outputs:

• 14,500BTU for natural gas.

• 13,000BTU for propane gas.

6.5.2 Removing, Installing Burners and Radiants

• Each burner is supported at the front by the injector (orifice)

on the manual hi-low gas valve.

• Each burner is also supported by a rear bracket, and

locked in place with a cotter pin. Remove these pins before

attempting to remove the burners.

IMPORTANT INSTALL PIN

To ensure burners don’t tilt during operation, re-install

the cotter pins at the back of the burners.

Top View

1 1

2 2

• The burners and baffles are packed tightly together. Before

removing the burners on the far left or far right of the unit

(

), you will need to first remove the burners next to them

(

). Reassemble in the reverse order.

• Proper installation of the radiants is important.

IMPORTANT RADIANT

When replacing the radiants, make

sure the feet of the radiants are sitting

properly, as shown, on the Front and

Back burner/radiant brackets. Otherwise,

the radiants will bend or warp over time.

Rear Bracket

Shown

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