Garland M42 M42R M42T M42S User manual
- Category
- Cookers
- Type
- User manual
High E ciency Radiant Char-Broiler
models
HEEGM24CL
HEEGM36CL
HEEGM48CL
HEEGM60CL
SERVICE MANUAL
Part # 4532502 Rev 0 (01-Aug-13) © 2013 Garland Commercial Ranges Limited
Please read all sections of this manual and retain for future
reference.
i
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.
i
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.
i
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.
i
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.)
i
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.
i
IMPORTANT
In the Commonwealth of Massachusetts this product must be installed
by a licensed plumber or gas fitter.
i
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.
i
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.
i
IMPORTANT
In Canada, installation of this appliance must comply with CSA B149.1
and local codes.
i
IMPORTANT
Many local codes exist and it is the responsibility of the owner and
installer to comply with those codes.
i
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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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
i
Data provided for installations UP TO 2000ft (610m)
i
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”.
1
Ignition wires are protected by a metal wire-way and high temperature silicone sleeve.
2
The flue at the back of the unit prevents overheating of the unit and its components.
3
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.
4
Solenoid valves connected in series, provide redundancy and ensure safe operation.
5
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.
6
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
6
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
ŝƌĂŋĞ
&ĂũŝƚĂ'ƌĂƚĞ;KƉƟŽŶͿ
Reversible Grate
/ŐŶŝƟŽŶDŽĚƵůĞ
(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
1
5
5
4
2
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.
1
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.
2
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.
i
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”).
3
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.
i
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.
4
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
/ŐŶŝƟŽŶDŽĚƵůĞ
4-Spark
^ŽůĞŶŽŝĚsĂůǀĞƐ
DĂŶŝĨŽůĚ
312 4
6-Spark
312 456
ƵƌŶĞƌƐϭͲϰŽŶƚƌŽůƐ
gas
DĂŝŶWŽǁĞƌKEͬK&&^ǁŝƚĐŚ
;ϮϰϬsKŶůLJͿ
HEEGM24CL
HEEGM36CL
Burner#
Top View of Burners
Burners ON/OFF
Switch
/ŐŶŝƟŽŶDŽĚƵůĞ
^ŽůĞŶŽŝĚsĂůǀĞƐ
DĂŶŝĨŽůĚ
ƵƌŶĞƌƐϭͲϲŽŶƚƌŽůƐ
gas
DĂŝŶWŽǁĞƌKEͬK&&^ǁŝƚĐŚ
;ϮϰϬsKŶůLJͿ
Transformer
;ϮϰϬsKŶůLJͿ
Transformer
;ϮϰϬsKŶůLJͿ
1
1
2
2
4
4
3
3
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
10
11
/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
gas
Transformer
(240V Only)
6-Spark
4-Spark
6-Spark
6-Spark
Main Power
ON/OFF Switch (240V Only)
Transformer
(240V Only)
Solenoid Valves
/ŐŶŝƟŽŶ
Modules
1
1
2
2
4
4
3
3
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
No
Yes
No
Is unit
sparking?
Is there
power at the
module?
No
Replace
module
240V
120V
Yes
Check
switch
Check
transformer
Is
transformer
faulty?
Yes
Replace
transformer
No
Yes
Check for gas
at manifold
spigot
Is gas
present?
Yes
No
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
No
Start 240V
Yes
No
Replace main
power switch
Yes
No
Is switch
faulty?
Replace
switch
Yes
No
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
i
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
2
2
2
2
3
4
1
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.
i
IMPORTANT
When removing the RIGHT Side Leg Panel, ensure you slide the panel out gently
without disconnecting any wire connections accidentally.
i
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
1
2
2
3
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)
i
i
i
i
IMPORTANT
There is a directional requirement for
gas pressure regulator. Ensure the
gas flows throw the regulator in the
correct direction.
i
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
i
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.
i
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
(
1
), you will need to first remove the burners next to them
(
2
). Reassemble in the reverse order.
• Proper installation of the radiants is important.
i
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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Garland M42 M42R M42T M42S User manual
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