Vulcan-Hart GHCB40 User manual

INSTALLATION &
OPERATION MANUAL
VULCAN-HART
DIVISION OF ITW FOOD EQUIPMENT GROUP, LLC
WWW.VULCANHART.COM
3600 NORTH POINT BLVD.
BALTIMORE, MD 21222
FORM 32801 (Sept. 2005)
For additional information on Vulcan-Hart or to locate an authorized parts andFor additional information on Vulcan-Hart or to locate an authorized parts and
For additional information on Vulcan-Hart or to locate an authorized parts andFor additional information on Vulcan-Hart or to locate an authorized parts and
For additional information on Vulcan-Hart or to locate an authorized parts and
service provider in your area, visit our website at www.vulcanhart.comservice provider in your area, visit our website at www.vulcanhart.com
service provider in your area, visit our website at www.vulcanhart.comservice provider in your area, visit our website at www.vulcanhart.com
service provider in your area, visit our website at www.vulcanhart.com
CERAMIC BROILERS
MODELS MLS
GHCB40C ML-52212
GHCB40 ML-52211
GHCB44 ML-52213
HCB2T ML-52203
HCB2B ML-52208
SUNGLOW BROILERS
MODELS MLS
IR2T ML-52207
IR2B ML-52201
GHIR44 ML-52210
MODEL GHCB40
TECHNICAL SERVICE AND PARTS ASSISTANCE
1-800-814-2028
HEAVY DUTY GAS BROILERS

– 2 –
IMPORTANT FOR YOUR SAFETY
THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS
EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND
ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL.
POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE
EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED
FROM THE LOCAL GAS SUPPLIER.
IMPORTANT
IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN
UNITS AT MAIN SHUTOFF VALVE AND CONTACT THE LOCAL
GAS COMPANY OR GAS SUPPLIER FOR SERVICE.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY
OTHER APPLIANCE.
WARNING: IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE
PROPERTY DAMAGE, INJURY OR DEATH. READ THE
INSTALLATION, OPERATING AND MAINTENANCE
INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR
SERVICING THIS EQUIPMENT.
IN THE EVENT OF A POWER FAILURE, DO NOT ATTEMPT TO
OPERATE THIS DEVICE.
© VULCAN-HART, 2005

– 3 –
IMPORTANT
STOP BOLTS MUST BE IN POSITION FOR SAFE OPERATION OF GRID.
IF DAMAGED OR MISSING, REPLACE AT ONCE.
DO NOT OPERATE GRID WITHOUT BOLTS.
STOP BOLTS

– 4 –
INSTALLATION, OPERATION AND CARE OF
CERAMIC AND SUNGLOW HEAVY DUTY BROILERS
PLEASE KEEP THIS MANUAL FOR FUTURE USE
GENERAL
The manufacturer suggests that you thoroughly read this entire manual and carefully follow all of the
instructions provided.
Your Vulcan Sunglow or Ceramic Broiler is produced with quality workmanship and material. Proper
installation, usage and maintenance of your broiler will result in many years of satisfactory performance.
INSTALLATION
UNPACKING - ALL BROILER MODELS
This broiler was inspected before leaving the factory. The transportation company assumes full
responsibility for safe delivery upon acceptance of the shipment. Immediately after unpacking, check
for possible shipping damage. If the broiler is found to be damaged, save the packaging material and
contact the carrier within 15 days of delivery.
Remove the small wood slats and wire used to hold burners and broiler grid in place.
Before installing, verify that the electrical service and type of gas supply (natural or propane) agree with
the specifications on the rating plate.
Models Rating Plate Location
IR2 & GHIR44 Cabinet bottom, front right-hand side
GHCB44 Inside cabinet door panel
HCB2 Cabinet bottom, front left-hand side
GHCB40 Oven: behind the kick panel attached to the left side of the oven
burner box front shield, positioned behind the bell crank
Broiler: Front manifold cover
If the supply and equipment requirements do not agree, do not proceed with the installation. Contact
your dealer or Vulcan-Hart immediately.

– 5 –
LOCATION
The equipment area must be kept free and clear of combustible substances.
This broiler is design certified for installation with the following minimum clearances from combustible
and noncombustible adjacent wall construction:
COMBUSTIBLE NONCOMBUSTIBLE
MODELS CONSTRUCTION CONSTRUCTION
GHCB40 Back 6" (152 mm) 0"
GHCB40C Right Side 6" (152 mm) 0"
GHCB44 Left Side 6" (152 mm) 0"
Floor 6" (152 mm) 0"
COMBUSTIBLE NONCOMBUSTIBLE
MODEL CONSTRUCTION CONSTRUCTION
GHIR44 Back 4" (102 mm) 0"
Right Side 0" 0"
Left Side 0" 0"
Floor 6" (152 mm) 0"
COMBUSTIBLE NONCOMBUSTIBLE
MODEL CONSTRUCTION CONSTRUCTION
HCB2 Back 4" (102 mm) 0"
Right Side 4" (102 mm) 0"
Left Side 4" (102 mm) 0"
Floor 6" (152 mm) 0"
COMBUSTIBLE NONCOMBUSTIBLE
MODEL CONSTRUCTION CONSTRUCTION
IR2 Back 4" (102 mm) 0"
Right Side 0" 0"
Left Side 0" 0"
Floor 6" (152 mm) 0"
The installation location must allow adequate clearances for servicing and proper operation. A
minimum front clearance of 35" (889 mm) is required.
Do not obstruct the flow of combustion and ventilation air. Adequate clearance for air openings into
the combustion chamber must be provided. Make sure there is an adequate supply of air in the room
to replace air taken by ventilating systems and allow for combustion gas at the broiler burners.

– 6 –
INSTALLATION CODES AND STANDARDS - ALL BROILER MODELS
Your broiler must be installed in accordance with:
In the United States
1. State and local codes.
2. National Fuel Gas Code, ANSI/Z223.1 (latest edition). Copies may be obtained from The
American Gas Association, Inc., 1515 Wilson Blvd., Arlington, VA 22209.
3. National Electrical Code, ANSI/NFPA-70 (latest edition). Copies may be obtained from The
National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
In Canada
1. Local codes.
2. CSA B149.1 Natural Gas and Propane Installation Code.
3. CSA C22.1 Canadian Electric Code (latest edition).
The above are available from the Canadian Standard Association, 5060 Spectrum Way, Suite 100,
Mississauga, Ontario, Canada L4W 5N6.
BROILERS MOUNTED ON CASTERS
Broilers mounted on casters must use a flexible connector (not supplied by Vulcan) that complies with
the Standard for Connectors for Movable Gas Appliances, ANSI Z21.69 • CSA 6.16 and a quick-
disconnect device that complies with the Standard for Quick-Disconnect Devices for Use With Gas
Fuel, ANSI-Z21.41 • CSA 6.9. In addition, adequate means must be provided to limit movement of the
appliance without depending on the connector and the quick-disconnect device or its associated piping
to limit appliance movement. Attach the restraining device at the rear of the broiler.
If disconnection of the restraint is necessary, turn off the gas supply before disconnection. Reconnect
this restraint prior to turning the gas supply on and returning the broiler to its installation position.
Separate instructions for installing casters to the broiler are included with the casters.
Note: If the broiler is installed on casters and is moved for any reason, it is recommended that the
broiler be releveled front to back and side to side.
UNSTACKING AND STACKING - MODEL GHCB2
Read all instructions carefully before unstacking or stacking broilers.
The height of Models HCB2 and IR2 sometimes prohibits entry through the kitchen facility doorway.
For this reason, two 3 3/4x 11/2x 3/64" (95 mm x 38 mm x 1.2 mm), aluminized stacking straps are shipped
with each broiler for ease of top section disassembly.
Broilers Shipped Pre-stacked
1. Remove top section finishing back.
2. From oval slots inside finishing back of the top section, remove two 10-24 bolts which connect
the top and bottom sections (Fig. 1).

– 7 –
3. Remove drip pan and disassemble two 10-24 bolts, one to the left and one to the right of the
inside drip pan area, behind the top section front frame (Fig. 2).
Fig. 1 Fig. 2
4. Carefully remove broiler top section from the bottom section.
5. Leaving the lower far-left and right holes open, reassemble the top finishing back onto the top.
Broilers Shipped in Two Pieces for Restacking
The incorporation of the stacking straps will eliminate the use of the two oval slots, one to the left and
one to the right, behind the finishing back of the top section. (See Step 2 under Broilers Shipped Pre-
Stacked.)
1. Position broilers as near to installation location
as possible. Remember to allow enough room to
complete stacking procedures.
2. Carefully lift top section and rest it evenly onto
the bottom section.
3. Remove top section drip pan. Align two holes,
one to the left and one to the right of the upper
drip pan area, behind the broiler front frame.
Insert two 10-24 bolts and assemble the top
section to the bottom section.
4. Replace the drip pan.
5. From rear of broiler, remove two 10-24 bolts from
the upper corner of the left- and right-hand bottom
section finishing back.
6. Using four 10-24 bolts, assemble the stacking
strap as shown in Fig. 3. This will complete the
stacking procedure. Fig. 3
STACKING STRAP
PL-56559
PL-41717
PL-41718

– 8 –
PL-41721
PL-41722
Fig. 6 Fig. 7
4. Align the four holes/slots in the rear flange of the diverter with the holes in the rear top flange
of broiler, and reinstall four 10-24 sheet metal screws (Fig. 6).
5. Diverter installation is now complete (Fig. 7).
DRAFT HOOD INSTALLATION - GHCB40 OR GHCB44
All GHCB40's and GHCB44's come equipped with a hood flue diverter that is packaged and laying in
the top broiler compartment. This flue diverter must be attached to the unit at the time of installation,
following the steps below:
1. If the diverter has protective plastic covering the assembly, remove all the plastic.
2. Place the diverter on top of the unit covering the flue (Fig. 4).
3. Remove four 10-24 sheet metal screws from the top rear flange of the broiler (Fig. 5).
PL-41719-1
HOOD
FLUE
DIVERTER
FLUE
SCREWS
PL-41720-1
Fig. 4 Fig. 5

– 9 –
Body Side Extensions
Body side extensions are wrapped separately and packaged lying in the top broiler compartment of
each GHCB40/44 Broiler. The use of these extensions is optional. The extensions are intended to help
align the broil battery evenly, front to back, with other Vulcan Heavy Duty Ranges. To install, follow the
steps below:
1. Locate and unwrap the extensions.
PL-41723-1
SCREWS
PL-41724
Fig. 8 Fig. 9
2. Remove five 10-24 sheet metal screws that attach each body side to the broiler back panel
(Fig. 8).
3. Align the holes left by removal of the 10-24 sheet metal screws with predrilled holes in the right
and left body extensions. Secure the extensions to the body sides by reinstalling the five 10-
24 sheet metal screws removed in Step 2 (Fig. 9).
NOTE: Do not align using the square flange openings. The square openings are to access use of
ratchet extensions for ease of assembly.

– 10 –
Fire Brick Installation - GHCB40/44
All GHCB40/44's come equipped with 12 center fire bricks and 8 side bricks.
The bricks must be placed in the broiler at the time of installation. The bricks are packaged in a
cardboard box, which is placed in the top broiler compartment for shipping. To install the bricks, follow
the steps below:
1. Cut through the shipping wire strap that holds the broiler grid in place if this has not already been
done.
2. Place the broiler grid into its lowest position.
PL-41725-1
CENTER FIRE BRICK
SIDE BRICK RIDGE
SIDE FIRE BRICK
PROTRUDING POINTS
Fig. 10
NOTE: Bricks are to be installed with the protruding points facing downward. Installing the side bricks
first will make the job easier (Fig. 10)
3. To install side brick, with brick in hand, points protruding downward, reach up through the broiler
grid compartment and rest the brick in the bracketing along side of the cast iron burners. It will
be necessary to tilt the bricks to get them between the burner and bracket. Then lift the brick
up above the burner and bracket, and set it carefully down in place.
NOTE: The side bricks have a ridge. This ridge should set down inside the far left and right bracket
flanges; you will install four bricks along each bracket flange (Fig. 11 and 12).
PL-41726 PL-41727-1
BRACKET FLANGE
SIDE BRICK RIDGE
BURNER
Fig. 11 Fig. 12

– 11 –
4. Center bricks are installed towards the center of the broiler in three rows of four bricks each.
Install the center bricks similar to that of the side bricks in Step 3. Angle the bricks and slip them
up between the burners, then set them in place.
NOTE: The center bricks are to be installed to rest between two burners on the vertical burner flange
(Fig. 13 and 14).
PL-41728 PL-41729
Fig. 13 Fig. 14
LEVELING AND CONNECTING MANIFOLDS - ALL MODELS
The IR2 Model is not designed to be batteried to other heavy duty equipment. After leveling the IR2
Model, as described in Step 2, proceed to Gas Connections.
1. Place the broiler in its exact position or battery lineup.
2. Using a carpenter level, level the broiler from front to rear and from side to side. Unless the
broilers are level, they will not give proper cooking results, and equipment being batteried will
not draw up tight.
As of January 1998, Vulcan-Hart appliances use Ward gas unions instead of Stockham gas unions.
If you are installing a new battery range to an existing field appliance, the union on the existing field
appliance must be checked against the union being used on the new range. The union manufacturer’s
name around the face surface of the union nut must match. The new range has been shipped with a
Ward union. If the old appliance has something different, i.e., Stockham, it must be replaced with a
Ward union. Failure to replace this union could result in a gas leak (Fig. 15).
If a Ward gas union is needed for installation, purchasing information may be obtained through the
Vulcan-Hart Parts Department.

– 12 –
Fig. 15
Questions or concerns regarding the installation procedures may be addressed by calling the Vulcan-
Hart Service Department 1-800-814-2028.
3. Engage union nut on manifold pipe of broiler with the male fitting on the next broiler, and draw
up union hand-tight. Be sure broilers butt both front and rear.
NOTE: Broilers are mounted on a steel, skid-type base, so a crowbar may be used to jockey units. If
the manifolds do not line up, then the broilers are not level.
4. Continue to level up and connect manifold pipe until all broilers in the battery are connected,
then tighten all manifold unions gas-tight.

– 13 –
GAS CONNECTIONS
CAUTION: All gas supply connections and any pipe joint compound used must be
resistant to the action of propane gases.
Connect gas supply to the broiler(s). Make sure the pipes are clean and free of obstructions, dirt and
piping compound.
Codes require that a gas shutoff valve be installed in the gas line ahead of the broiler.
Natural gas broilers and propane gas broilers are equipped with fixed orifices and no adjustment is
necessary.
Model IR Broilers for operation on natural or propane gas are also equipped with a factory-preset
pressure regulator, with an outlet pressure of 6" (1.49 mb) Water Column for natural gas supply and
10" (2.49 mb) Water Column for propane gas supply. No further adjustment should be required.
Models GHCB40 and GHCB44 also require a pressure regulator (not supplied). The regulators must
have:
• C.S.A. design certification.
• Enough regulation capacity for the total connected gas load.
• Pressure adjustment range to allow adjustment for the manifold pressure marked on the rating
plate.
Unless the manifold pressure on all connected broilers is the same, a separate regulator must be
supplied for each broiler having different manifold pressures.
If the front plates do not line up perfectly, adjust by using bolts under the front plate.
WARNING: PRIOR TO LIGHTING, CHECK ALL JOINTS IN THE GAS SUPPLY LINE FOR
LEAKS. USE SOAP AND WATER SOLUTION. DO NOT USE AN OPEN FLAME.
Ensure that burner heads are connected.
After piping has been checked for leaks, all piping receiving gas should be fully purged to remove air.
TESTING THE GAS SUPPLY SYSTEM
When test pressures exceed 1/2psig (3.45 kPa), the broiler and its individual shutoff valve must be
disconnected from the gas supply piping system.
When test pressures are 1/2psig (3.45 kPa) or less, the broiler must be isolated from the gas supply
system by closing its individual manual shutoff valve.
FLUE CONNECTIONS
DO NOT obstruct the flow of flue gases from the flue duct located on the rear of the broiler. It is
recommended that the flue gases be ventilated to the outside of the building through a ventilation
system installed by qualified personnel.
From the termination of the broiler flue vent to the filters of the hood venting system, an 18" (457 mm)
minimum clearance must be maintained.
Information on the construction and installation of ventilating hoods may be obtained from the standard
for "Vapor Removal from Cooking Equipment," NFPA No. 96 (latest edition), available from the
National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

– 14 –
ELECTRICAL CONNECTIONS
WARNING: ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE
APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER LOCAL
ELECTRICAL CODES.
WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW
LOCKOUT / TAGOUT PROCEDURES.
If the broiler is not equipped with a grounding plug and electrical supply is needed, ground the broiler
by using the ground lug provided (refer to the wiring diagram located inside the lower cabinet section).
Infrared broilers Models IR2 and GHIR44 are equipped with a 4' (122 cm) long supply cord.
WARNING: APPLIANCES EQUIPPED WITH A FLEXIBLE ELECTRIC SUPPLY CORD ARE
PROVIDED WITH A THREE-PRONG GROUNDING PLUG. IT IS IMPERATIVE THAT THIS PLUG
BE CONNECTED INTO A PROPERLY GROUNDED THREE-PRONG RECEPTACLE. IF THE
RECEPTACLE IS NOT THE PROPER GROUNDING TYPE, CONTACT AN ELECTRICIAN. DO
NOT REMOVE THE GROUNDING PRONG FROM THIS PLUG.
Do not connect broiler to electrical supply until after gas connections have been made.
MINIMUM BYPASS SETTING - MODEL GHCB40 OVEN
Adjust the oven pilot and burner for proper adjustment of minimum bypass setting. See instructions
under LIGHTING INSTRUCTIONS - MODEL GHCB40 OVEN.
LIGHTING INSTRUCTIONS - MODELS GHCB44 AND GHCB40 BROILERS
1. Remove au gratin oven bottom, baffle and burner box cover.
2. Remove oven bottom and baffles (Model GHCB40 only).
3. Remove manifold panel.
4. Turn gas supply ON.
5. Place the ceramics, with the projections down, to the rear of broiler burners. The lugs on the
burners will properly position themselves. The ceramics are sized at the factory.
6. Place the au gratin oven baffle and bottom, but leave the burner box cover off.
7. Turn the gas valve ON and allow air in the line to be exhausted. When gas begins to flow, turn
gas valve OFF and wait 5 minutes before lighting pilots and burner with a taper. The burner
flame should be sharp when the broiler is cold, with a blue cone of flame about 3/4" (19 mm) long
on natural gas and 1/2" (12.7 mm) long on propane gas. The flame will soften out and curl around
the ceramics as the broiler gets hot. The length of the flame is determined by the adjustment
of the nozzle. The sharpness of the flame is determined by the air shutter adjustment.
8. Adjust broiler pilots at the pilot valve on the left end of the pilot manifold pipe. Adjust the flame
to approximately 3/4" (19 mm) long. Replace the burner box front.
9. Replace manifold panel and other parts that had been removed.
NOTE: Be sure pilots remain lit after installation.

– 15 –
Carbonization of Ceramics
If the ceramics take on a black sooty accumulation, the burners are receiving an insufficient amount
of air. Open the air shutters further to provide more air. If carbonization occurs during initial adjustment,
it will burn off as soon as proper adjustment is achieved.
Burner Performance
If, after a period of satisfactory operation, the burner flame characteristics should change or the length
of burner flame should be reduced, either the air mixer opening or the gas valve orifice has become
restricted. The burners should be cleaned every 60 days, or more often as required, by an authorized
servicer.
LIGHTING INSTRUCTIONS - MODEL GHCBO40 OVENS
1. If the oven pilot is out, turn the burner OFF. Wait 5 minutes before relighting.
2. Depress the red ignition button located on the oven control panel and ignite the pilot. Hold
60 seconds until pilot remains ON.
3. Adjust the oven pilot and burner for proper adjustment of minimum bypass setting. This
adjustment must be made at the time the broiler is installed. To adjust this flame:
• Be sure oven burner pilot flame is ignited.
• With oven cold, slowly turn dial (Fig. 16) counterclockwise from OFF until main burner gas
snaps on.
• Remove dial.
• With a screwdriver, turn bypass adjustment screw (Fig. 16) counterclockwise to increase the
bypass flame, or clockwise to decrease it, until flame over entire burner is approximately 1/8"
(3.175 mm) high.
• Replace dial.
CAUTION: While making this adjustment, if the oven should become heated while the dial
is set at a low range (below 350°F [177°C]), the bypass flame will shut off completely. If this
occurs, turn dial counterclockwise slowly until bypass gas snaps on. Then check bypass
adjustment as stated above.
DIAL
POINTER "A"
CALIBRATION
SCREWS
CALIBRATION
PLATE
BY-PASS
ADJUSTMENT
SCREW
SCREW
CLEARANCE
SLOTS
MODEL
FDO
PL-56560
4
0
0
3
5
0
4
5
0
5
0
0
1
5
0
2
0
0
2
5
0
3
0
0
B
A
K
I
N
G
L
O
R
O
A
S
T
Fig. 16

– 16 –
LIGHTING INSTRUCTIONS - MODELS HCB2
1. Remove burner box front cover and turn gas supply ON.
2. Place the ceramics, with the projections down, to the rear of broiler burners. The lugs on the
burners will properly position themselves. The ceramics are sized at the factory.
3. Turn the gas valve ON and allow air in the line to purge. When gas begins to flow, turn gas valve
OFF and wait 5 minutes before lighting the pilots. The pilot flame should be about 3/4" high and
burner with a taper. The burner flame should be high enough to touch the ceramic bricks. The
length of the burner flame is determined by the adjustment of the burner nozzle. When the
burner flame is cold, the flame should appear as a sharp blue cone. As the flame gets hot, it
will soften in color and begin to curl around the ceramics. The sharpness of the flame is
controlled by the setting of the burner air shutter (Fig. 17).
PL-41730
Fig. 17
Pilot Burner Adjustment
Turn the pilot burner valve (located in the lower compartment) ON. Each burner is provided with a
standing pilot burner. Adjust the pilot flame to approximately 3/4" (19 mm) flame height. The adjusting
valve is installed in the inlet of the pilot burner manifold, located behind the removable front panel above
the grid area.
Carbonization of Ceramics
If the ceramics take on a black sooty accumulation, the burners are receiving an insufficient amount
of air. Open the air shutters further to provide more air. If carbonization occurs during initial adjustment,
it will burn off as soon as proper adjustment is achieved.
Burner Performance
If, after a period of satisfactory operation, the burner flame characteristics should change or the length
of burner flame should be reduced, either the air mixer opening or the gas valve orifice has become
restricted. The burners should be cleaned every 60 days, or more often as required, by an authorized
servicer. This is not a warranty call.

– 17 –
LIGHTING INSTRUCTIONS - MODELS IR2 AND IR44 (INFRARED)
1. Remove burner box cover.
2. Turn gas supply ON.
3. Turn pilot burner Bvalve (located in the lower left-hand compartment) (Fig. 18) ON and light
pilots (one pilot per burner) with a taper (Fig. 19).
4. If the pilots go out, turn Bvalve (Fig. 18) OFF and wait 5 minutes, then repeat Step 3.
PL-41731-1
BURNER BVALVE
INDICATOR LIGHT
TOGGLE SWITCH
PL-41732
Fig. 18 Fig. 19

– 18 –
Pilot Burner Adjustment
Turn the pilot burner Bvalve ON. The valve is located in the lower compartment.
Each burner is provided with a standing pilot burner. Adjust the pilot flame to approximately a
3/4" (19 mm) flame length. The adjusting valve is installed in the inlet of the pilot burner manifold, located
behind the removable front panel above the grid area (Fig. 20).
PL-41733-1
PILOT BURNER ADJUSTMENT VALVE
HI-LOW VALVE
BURNER ORIFICE TIP
Fig. 20

– 19 –
Main Burner Adjustment
Orifices (1 per burner) are located in the front of each burner venturi, behind a removable front panel
above the grid area. Each burner is controlled by either a "Hi-Lo" Valve (IR2), or a "Hi-Med-Lo" Valve
(GHIR44) and an orifice (Fig. 21).
Main Burner Valve Adjustment
The "high" position is fixed and cannot be adjusted. The "low" position may be adjusted to obtain the
minimum stable flame. In order to adjust the "low" setting, turn the knob to "low," remove the knob and
rotate the adjusting screw (located in the center shaft of the valve) clockwise to decrease and
counterclockwise to increase burner flame (see Fig. 20).
Air Adjustment
Although air adjustment is made at the factory before the broiler is shipped, it may be necessary to
readjust after installation is made. All of the air required for combustion is supplied by the blower
through an air duct on the left side. A single air adjustment is provided at the air intake to the blower
(GHIR44) or behind each "right" burner valve (IR2). No other adjustment is provided or necessary
(Figs. 20 and 21.)
Burners or infrared generators should burn with uniform radiant heat and without any flame curling
around the sides of the burner. If flame curls around the burner, the air supply needs to be increased;
if burner radiates with a bright orange glow with darkened areas throughout, the air supply should be
decreased.
(Model GHIR44 Only) — Insufficient air may keep the pressure switch opened and the solenoid valve
will not open to supply gas to the broiler. Increase the air supply to obtain proper operation.
PL-41734
Fig. 21
Carbon Accumulation — Burner Screen (Infrared Broilers Only)
If the burner screens take on a black sooty accumulation, the burners are not receiving enough air.
Increase the air supply at the blower inlet. The carbon will burn off as soon as the proper adjustment
is made.

– 20 –
OPERATION
WARNING: THE BROILER AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING,
CLEANING AND SERVICING THE BROILER.
CONTROLS
Au Gratin Oven Door and Handle —(GHCB40, GHCB44 and GHIR44)
Counterbalanced for easy opening. To open, lift
the door handle up. To close the door, pull the
handle straight down.
Grid Positioning Handle — Allows grid assembly to be adjusted to the proper
level depending on the product being prepared.
The higher the positioning of the grid, the closer
the product will be to the burner flame.
To relocate the grid position, grasp the grid lever
arm and push the handle to the right of the index
plate (HCB2 and IR broilers) (to the left on
GHCB44 and GHCB40 broilers). Glide the arm up
or down to the desired location. Push the lever arm
handle to the left (right on GHCB44 and GHCB40
broilers) and lock the arm into the proper slot.
Broiler Grid Handle — Allows the operator to pull the grid clear of the heat
zone, but does not allow the grid to be completely
removed from the broiler. When the product is to
be removed from the heat zone, pull the grid
handle straight out. The grid assembly, which is on
roller bearings, will slide out until it locks into
place. To return the grid assembly to the broiling
compartment, pull the grid handle slightly up and
push straight back (Fig. 22).
PL-41735
Fig. 22