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Installation, Operation, & Maintenance
Model: GCCO-PT,
Gas Full Size Convection Oven
Lang Manufacturing Company 10 Sunnen Drive St. Louis, MO 63143
Rev. B-2009 Phone: 425-349-2400 Fax: 425-349-2733
Part# 60800-43 WWW.LANGWORLD.COM
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THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE. READ, UNDERSTAND
AND FOLLOW THE INSTRUCTIONS AND WARNINGS CONTAINED IN THIS MANUAL.
DANGER
WARNING
CAUTION
NOTICE
POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT
AVOIDED, COULD RESULT IN DEATH.
POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT
AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY.
POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT
AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY.
Helpful operation and installation instructions and tips are
present.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN
THE VICINITY OF THIS OR ANY OTHER APPLIANCE.
POST IN A PROMINENT LOCATION
INSTRUCTIONS TO BE FOLLOWED IN THE EVENT USER SMELLS GAS. THIS
INFORMATION SHALL BE OBTAINED BY CONSULTING YOUR LOCAL GAS SUPPLIER.
AS A MINIMUM, TURN OFF THE GAS AND CALL YOUR GAS COMPANY AND YOUR
AUTHORIZED SERVICE AGENT. EVACUATE ALL PERSONNEL FROM THE AREA.
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.
Model #: Purchased From:
Serial #:
Location:
Date Purchased:
Purchase Order #:
Date Installed:
For Service, Call:
Page 3
TABLE OF CONTENTS
CHAPTER PAGE
TABLE OF CONTENTS ...................................................................................... 3
READ FIRST ........................................................................................................ 4
EQUIPMENT DESCRIPTION ............................................................................. 6
UNPACKING........................................................................................................ 7
INSTALLATION.................................................................................................. 8
INITIAL START-UP ............................................................................................ 13
OPERATION ........................................................................................................ 14
MAINTENANCE & CLEANING PROCEDURES.............................................. 18
TROUBLE SHOOTING ....................................................................................... 19
PARTS LIST ......................................................................................................... 21
WIRING DIAGRAM ............................................................................................ 22
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IMPORTANT READ FIRST IMPORTANT
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CAUTION
CAUTION
CAUTION
WARNING
NOTICE
NOTICE
NOTICE
THE OVEN WEIGHS 500 LBS. FOR SAFE HANDLING, INSTALLER
SHOULD OBTAIN HELP AS NEEDED, OR EMPLOY APPROPRIATE
MATERIALS HANDLING EQUIPMENT (SUCH AS A FORKLIFT, DOLLY, OR
PALLET JACK) TO REMOVE THE UNIT FROM THE SKID AND MOVE IT TO
THE PLACE OF INSTALLATION.
ANY STAND, COUNTER OR OTHER DEVICE ON WHICH THE OVEN WILL
BE LOCATED MUST BE DESIGNED TO SUPPORT THE WEIGHT OF THE
OVEN.
SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN
CUT.
INSTALLATION OF THE UNIT MUST BE DONE BY PERSONNEL QUALIFIED
TO WORK WITH PLUMBING. IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT. UNIT MUST
BE INSTALLED IN ACCORDANCE WITH ALL APPLICABLE CODES.
The data plate is located above control panel behind wire mesh screen.
The oven serial number, gas specifications, and clearance specifications
are on the data plate. This information should be carefully read and
understood before proceeding with the installation.
The installation of this griddle must conform to applicable National, State
and locally recognized installation standards.
The installation of any components such as a vent hood, grease
extractors, fire extinguisher systems, must conform to their applicable
National, State and locally recognized installation standards.
WARNING
WARNING
NOTICE
WARNING
NOTICE
CAUTION
THIS APPLIANCE IS EQUIPPED WITH A 3-PRONG (GROUNDING) PLUG
FOR YOUR PROTECTION AGAINST SHOCK HAZARD AND MUST BE
PLUGGED DIRECTLY INTO A PROPERLY GROUNDED 3-PRONG
RECEPTACLE. DO NOT CUT OR REMOVE THIS GROUNDING PRONG
FROM THE PLUG.
CONVECTION OVENS INSTALLED WITH CASTERS MUST HAVE THE
FOLLOWING: A CONNECTOR THAT COMPLIES WITH THE STANDARD
FOR CONNECTORS FOR MOVABLE GAS APPLIANCES ANSI Z21.69
LATEST EDITION, A QUICK DISCONNECT THAT COMPLIES WITH THE
STANDARD FOR QUICK DISCONNECT DEVICES FOR USE WITH GAS
FUEL, ANSI Z21.141 LATEST EDITION, A TETHER OR OTHER MEANS TO
LIMIT APPLIANCE MOVEMENT WITH OUT RELIANCE ON THE GAS
SUPPLY PIPING. SECURELY ATTACH THE TETHER TO THE EYEBOLT
PROVIDED AT THE REAR OF THE APPLIANCE.
Kits designed to accommodate ovens from sea level to 5000 feet. Contact
factory for orifice sizes on installations above 5000 feet.
BEFORE LIGHTING, USE A SOAP AND WATER SOLUTION TO TEST ALL
JOINTS FOR GAS LEAKS.
During the first few hours of operation you may notice a small amount of
smoke coming off the oven, and a faint odor from the smoke. This is
normal for a new oven and will disappear after the first few hours of use.
ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE FROM
COMBUSTIBLE MATERIALS.
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IMPORTANT READ FIRST IMPORTANT
CAUTION
WARNING
CAUTION
NOTICE
NOTICE
WARNING
CAUTION
KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY. IF SPILLS
OCCUR, CLEAN IMMEDIATELY, TO AVOID THE DANGER OF SLIPS OR
FALLS.
KEEP WATER AND SOLUTIONS OUT OF CONTROLS. NEVER SPRAY OR
HOSE CONTROL CONSOLE.
MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS
MEMBRANES AND CLOTHING. PRECAUTIONS SHOULD BE TAKEN TO
WEAR RUBBER GLOVES, GOGGLES OR FACE SHIELD AND PROTECTIVE
CLOTHING. CAREFULLY READ THE WARNING AND FOLLOW THE
DIRECTIONS ON THE LABEL OF THE CLEANER TO BE USED.
Never leave a chlorine sanitizer in contact with stainless steel surfaces
longer than 10 minutes. Longer contact can cause corrosion.
Service on this, or any other, LANG appliance must be performed by
qualified personnel only. Consult your authorized service station directory
or call the factory at 1-800-807-9054 or WWW.STAR-MFG.COM For the
service agent nearest you.
BOTH HIGH AND LOW VOLTAGES ARE PRESENT INSIDE THIS
APPLIANCE WHEN THE UNIT IS PLUGGED/WIRED INTO A LIVE
RECEPTACLE. BEFORE REPLACING ANY PARTS, DISCONNECT THE
UNIT FROM THE ELECTRIC POWER SUPPLY.
USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY
LANG OR THEIR AUTHORIZED DISTRIBUTORS CAN CAUSE BODILY
INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.
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EQUIPMENT DESCRIPTION
Lang Model: GCCO-PT
Exterior Construction
The oven exterior dimensions are 40” (100 cm) Wide, 32” (80 cm) High, 38” (95
cm) Deep. The Top, Front, Back, and Sides are constructed of stainless steel with an
aluminized bottom.
The oven doors come standard with a double pane window.
The door handle is constructed of Stainless Steel and Phonolic Tubing.
The oven cavity is insulated with high temperature insulation for efficiency and
reduced heat loss.
Interior Construction
The oven cavity dimensions are 29” (72.5 cm) Wide, 20” (50.84 cm) High, 21”
(53.38 cm) Deep.
The interior of the oven is constructed of porcelainized stainless steel.
Operation
The GCCO-PT oven is a forced air convection oven with a vented oven cavity.
The air is driven by a 1/3 HP fan motor.
Controls
Icon driven (touch) panel allows for easy operation.
Complete computerized controls.
Pre-Programmable product selections.
Independent shelf timers for each shelf.
Load control through use of Cooking Curves.
Shelf compensation for uniform baking.
Solid-state temperature sensing and controls.
Dual speed fan.
Manual override controls.
Technical
The GCCO-PT oven operates on either Natural Gas or Propane and can be field
converted to either gas.
Floor space required is 48” (122.6 cm) wide, 44” (112.5 cm) deep.
The oven weighs 500 lbs. (227.28 kg).
Contact the factory for correct orifice sizes when installing oven above 4000 ft.
The GCCO-PT has electronic ignition and requires a 120-Volt single-phase
connection.
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UNPACKING
Receiving the Oven
Upon receipt, check for freight damage, both visible and concealed. Visible
damage should be noted on the freight bill at the time of delivery and signed by the
carrier's agent. Concealed loss or damage means loss or damage, which does not
become apparent until the merchandise has been unpacked. If concealed loss or
damage is discovered upon unpacking, make a written request for inspection by the
carrier's agent within 15 days of delivery. All packing material should be kept for
inspection. Do not return damaged merchandise to Lang Manufacturing
Company. File your claim with the carrier.
Location
Prior to un-crating, move the oven as near to its intended location as practical. The
crating will help protect the unit from the physical damage normally associated
with moving it through hallways and doorways.
Un-crating
The oven will arrive completely assembled inside a wood frame and strapped to a
skid. Cut the straps and remove the wood frame.
CAUTION
THE OVEN WEIGHS 500 LBS. FOR SAFE HANDLING, INSTALLER
SHOULD OBTAIN HELP AS NEEDED, OR EMPLOY APPROPRIATE
MATERIALS HANDLING EQUIPMENT (SUCH AS A FORKLIFT, DOLLY, OR
PALLET JACK) TO REMOVE THE UNIT FROM THE SKID AND MOVE IT TO
THE PLACE OF INSTALLATION.
CAUTION
CAUTION
Remove Oven from skid and place in intended location.
ANY STAND, COUNTER OR OTHER DEVICE ON WHICH THE OVEN WILL
BE LOCATED MUST BE DESIGNED TO SUPPORT THE WEIGHT OF THE
OVEN.
SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN
CUT.
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INSTALLATION
WARNING
NOTICE
NOTICE
INSTALLATION OF THE UNIT MUST BE DONE BY PERSONNEL QUALIFIED
TO WORK WITH PLUMBING. IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT. UNIT MUST
BE INSTALLED IN ACCORDANCE WITH ALL APPLICABLE CODES.
The data plate is located above control panel behind wire mesh screen.
The oven serial number, gas specifications, and clearance specifications
are on the data plate. This information should be carefully read and
understood before proceeding with the installation.
The installation of any components such as a vent hood, grease
extractors, fire extinguisher systems, must conform to their applicable
National, State and locally recognized installation standards.
Leg Installation
Legs are available for both the single and double deck installations. Single deck
installations require a 27-inch leg. Double deck installations require 6-inch legs or
casters.
To install the 27-inch legs, place some cardboard on the floor and gently tip the
oven onto its back. Fasten two legs to the oven's front corners using the four 5/16
inch bolts provided in the leg kit. Lift the oven onto its front legs and block the
back up using one of the 27-inch legs set upside down in the center rear of the oven
body. Install the last 27-inch leg onto the oven body on the control side rear.
Gently lift the oven rear, remove the leg set to support the oven center and install it
on the last rear corner.
To install the 6-inch legs or casters, follow the instructions in the Leg Pad section
on the following pages or in the Leg Pad box supplied with the oven.
The adjustable feet on the bottom of each leg may be screwed in or out as
necessary to level the oven.
A torpedo level placed on an oven rack will assist in leveling the oven.
Stacking the Ovens
Remove all the plug buttons from the top of the lower oven.
Remove the stacking kit from the oven compartment of one oven and install the 1
1/4-inch plastic bushing into the top of the lower oven.
Tip the top oven backwards and install two 3/8-inch socket head bolts, found in the
stacking kit, into the two front leg holes that match the holes in the top of the lower
oven. Install the socket head bolts with the heads of the bolt pointing away from
the oven.
Lift the top oven and gently set on top of the lower oven so that the heads of the
socket head bolts nest into the holes in the top of the lower oven.
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INSTALLATION CONT’D
Leg Pad Adapter
Identify the front and rear leg adapters (the front adapters have two threaded inserts, the
rear has four).
Leg to Adapter Installation:
Install the leg’s threaded stud through the hole in the adapter labeled “C” with the bent
flange of the adapter facing away from the leg.
Screw the 3/4-inch nut supplied in the adapter kit onto the leg stud and tighten.
Caster to Adapter Installation:
Place the swivel
away from the caster.
Install the four 5/16 inch bolts through the caster base and the adapter holes labeled “A”
then install the 5/16 inch nuts with washer and lock washers.
caster against the front leg adapter with the flange of the adapter facing
Place the rigid
away from the caster.
Align the caster to the holes in the adapter labeled “B”. NOTE: There are two sets of
“B” holes set at 90° from the each other. One set will create a left rear adapter and the
other set will create a right rear adapter.
Install four 5/16-inch bolts through the caster base and the adapter holes labeled “B” then
install 5/16-inch nuts with lock washers and flat washers.
Adapter to Oven Installation:
Gently tip the oven onto its back. Place the front leg adapter into the front corers of the
oven. The holes without the threaded inserts face the front of the oven and the flange on
the adapter points toward the bottom of the oven.
The edge of the leg adapter with the threaded insert slips under the flange on the oven
side, while the edge without the inserts sits on top of the threaded angle on the oven
front.
Install two 3/8-inch bolts with lock washers and flat washers through the front holes “D”
in the leg adapter and into the threaded inserts on the oven.
Thread one 3/8-inch bolt with lock washer and flat washer into the rear threaded hole
labeled “E” on each of the leg adapters.
The forward threaded hole on the front leg adapter does not get a bolt installed.
Place the rear leg adapters into the rear corners of the oven so that the adapter is under
the flange of the oven side and back. NOTE: If installing a caster place the adapter on
the oven so that the casters roll forward.
casters against the rear leg adapter with the flange of the adapter facing
Install for 3/8-inch bolts with lock washers and flat washers through the holes labeled
“E” in the flange of the oven and into the threaded inserts of the leg adapter.
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INSTALLATION CONT’D
Ventilation and Clearances
Standard minimum clearance from combustible construction is as follows.
4” from side
4” from back
6” from floor
These ovens may be set directly, without legs, on a curbed base or non-combustible
floor.
If the oven is set without legs on a non-combustible floor or a curbed base, maintain a
4-inch back clearance.
If the oven is set directly against a non-combustible back wall, maintain a 6-inch
clearance to the floor.
Do not install the oven closer than 4 inches from another oven on the right hand side
(control panel side).
Do not install the oven closer than 12 inches from an uncontrolled heat source (char
broiler etc.) on the right side.
Keep the appliance area free and clear of combustible material and do not obstruct the
flow of combustion or ventilation air.
The installation of any components such as a vent hood, grease extractors, and/or fire
extinguisher systems, must conform to the there applicable nationally recognized
installation standards.
WARNING
THIS APPLIANCE IS EQUIPPED WITH A 3-PRONG (GROUNDING) PLUG
FOR YOUR PROTECTION AGAINST SHOCK HAZARD AND MUST BE
PLUGGED DIRECTLY INTO A PROPERLY GROUNDED 3-PRONG
RECEPTACLE. DO NOT CUT OR REMOVE THIS GROUNDING PRONG
FROM THE PLUG.
Electrical Connection
The electrical connection must be made in accordance with local codes or in the
absence of local codes with NFPA No.70, latest edition (in Canada use: CAS STD.
C22.1).
The electrical service entrance is provided by a cord and plug located at the oven back
directly behind the control compartment.
Each oven requires a 115-volt grounded supply and 7.1 amps.
Supply wire size must be large enough to carry the amperage load for the number of
ovens being installed. Wire size information can be found on the oven data plate.
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INSTALLATION CONT’D
WARNING
CONVECTION OVENS INSTALLED WITH CASTERS MUST HAVE THE
FOLLOWING: A CONNECTOR THAT COMPLIES WITH THE STANDARD
FOR CONNECTORS FOR MOVABLE GAS APPLIANCES ANSI Z21.69
LATEST EDITION, A QUICK DISCONNECT THAT COMPLIES WITH THE
STANDARD FOR QUICK DISCONNECT DEVICES FOR USE WITH GAS
FUEL, ANSI Z21.141 LATEST EDITION, A TETHER OR OTHER MEANS TO
LIMIT APPLIANCE MOVEMENT WITH OUT RELIANCE ON THE GAS
SUPPLY PIPING. SECURELY ATTACH THE TETHER TO THE EYEBOLT
PROVIDED AT THE REAR OF THE APPLIANCE.
Gas Connection
This appliance is manufactured for use with the type of gas indicated on the data plate.
Contact the factory if the gas type does not match that which is on the data plate.
All gas connections must be in accordance with local codes and comply with the
National Fuel Gas Code ANSI Z223.1 latest edition.
An internal gas pressure regulator is located inside the control compartment.
Gas must be delivered to the appliance regulator at less than 1/2 pound of pressure and
less than 1/2-inch water column pressure drop.
The internal regulator is preset at the factory, however, due to gas pressure variations
from area to area; it may be necessary to make some minor adjustments to the
regulator to provide the manifold pressure indicated on the data plate. This should be 5
inches water column for natural gas and 10-inch water column for propane. A 1/8-inch
NPT tap is provided on the main manifold for checking regulator pressure. Access the
main manifold by removing the trim piece below the oven doors.
When replacing the 1/8-inch plug in the main manifold a joint sealant that is resistant
to the action of liquid petroleum gas must be used.
The supply piping must be of sufficient size to provide 55,000 BTU/hr per oven. A
1/2-inch NPT connection is provided at the rear of the oven directly behind the control
compartment. Connect each oven separately.
A gas shut off valve must be installed to the oven(s) and located in an accessible area.
This appliance and its individual shutoff valve must be disconnected from the gas
supply piping system during any pressure testing of that system at test pressures in
excess of 1/2 PSGI and the appliance must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during any pressure testing of the
gas supply system at test pressures equal to or less than 1/2 PSIG.
Test for gas leaks. Use a commercial leak detector or a soap and water solution.
Flu Installation
A flu extension must be installed on the lower oven of a stacked set.
The extension attaches to the flu opening of the lower oven and directs the flu products
into the flu opening of the upper oven.
This extension must be installed.
The ovens may now be set into position. Be careful if sliding the ovens, they are not
designed to slide over cracks or obstructions in the floor.
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INSTALLATION CONT’D
Gas Conversions
1. Disconnect oven from power and gas.
2. Remove bottom trim piece from oven (2 hex head bolts and 1 Phillips screw).
3. Remove side panel from oven.
4. Disconnect black manifold pipe from 3/8” aluminum pipe at the furrel nut.
5. Remove two Phillips screws holding black manifold pipe to oven.
6. Remove black manifold pipe from oven.
7. Remove both burner orifices from manifold and replace with new orifices, making
sure to apply pipe thread compound.
8. Remove two Phillips screws holding pilot assembly to oven.
9. Remove pilot assembly from oven.
10. Remove ¼” aluminum pipe from pilot assembly.
11. Remove pilot orifice and replace with new pilot orifice.
12. Re-attach ¼” aluminum pipe to pilot assembly.
13. Re-attach pilot assembly to oven.
14. Re-install black manifold assemblies to oven, making sure that the orifices go into
the burner tubes.
15. Re-attach 3/8” aluminum pipe to black manifold assembly.
16. Remove the seal screw from the combination gas valve.
17. Remove the adjustment screw and spring from the combination valve.
18. Insert new spring into the valve and adjustment screw.
19. Re-connect oven to power and gas and check for leaks using a soap solution.
20. Adjust gas pressure to correct water column (5”NG, 10”LP).
21. Install new seal screw provided in kit and affix “Caution” sticker to the visible side
of the combination valve.
22. Re-install bottom trim piece and side panel.
NG to LP LP to NG
Part No. Description Qty. Part No. Description Qty.
80401-05 Pilot Orifice, Drilled .010 1 80401-10 Pilot Orifice, Drilled .018 1
80400-14 Main Burner Orifice, Drilled #53 2 80400-13 Main Burner Orifice, Drilled #43 2
Combination Gas Valve Spring,
Includes:
80505-11
NOTICE
UL File# MH19366 Rev. 2003A
1. Spring
2. Seal Screw
3. Caution Sticker
Kits designed to accommodate ovens from sea level to 5000 feet. Contact
factory for orifice sizes on installations above 5000 feet.
1
80505-16
13
Combination Gas Valve Spring,
Includes:
1. Spring
2. Seal Screw
3. Caution Sticker
1
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INITIAL START UP
WARNING
BEFORE LIGHTING, USE A SOAP AND WATER SOLUTION TO TEST ALL
JOINTS FOR GAS LEAKS.
Pre-Power On
After the oven is installed and connected to power & gas, prior to turning on, verify
the following:
• The doors open and close freely.
• All racks are in the oven correctly.
• All packing materials have been removed from the inside of the oven.
• All power and gas connections are tight.
Power On
The pilot burner is electronically ignited. When the oven power switch is turned
On the pilot will light.
There is a lockout safety feature on the spark ignition module. If, during the initial
start-up, the pilot does not light within 30 seconds the module will turn off all gas
to the pilot burner. To reset the spark module, turn Off the power switch for 10
seconds then turn the switch back On. This may need to be repeated several times
during the initial start-up until gas is present at the pilot burner.
NOTICE
During the first few hours of operation you may notice a small amount of
smoke coming off the oven, and a faint odor from the smoke. This is
normal for a new oven and will disappear after the first few hours of use.
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Control Panel
p
y
Function keys. Keys are
active when a program
option is displayed on
display.
OPERATION
Alphanumeric Display.
Cancel button. When
scrolling through menu’s
this will allow you to back
up to the previous menu.
In program mode this will
allow you to advance to the
next ste
Arrow up button. Allows
ou to scroll up.
.
X
Cancel
Up Down Light
P L A T I M U M
On/Off
Light switch. Inspection light only.
Push for light to come on. Light will
automatically turn off.
Power switch.
Arrow down button. Allows
you to scroll down.
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TYPICAL OPERATION SEQUENCE
ACTION RESULT
Press the on switch. Control panel comes on; display says “LANG,
Select “Run Oven”. Display will show a list of product to choose.
Select Product button next to Icon desired. Display says “Preheating to XXXF”.
Beeper sounds briefly. Display says, “Ready”.
Select Product to start. Display shows possible product selection for
Select Product to start. Display says “Select shelf”.
Press Product button next to desired shelf. Display will show icon chosen and begin to
Beeper sounds continuously. Display shows “ DONE” press button and
OPERATION CONT’D
Run Oven, Time Date Program.
that temperature.
count down.
remove product from that shelf.
Oven is ready for another product.
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OPERATION CONT’D
Hints & Suggestions
Convection ovens constantly circulate air over and around the product. This strips away the thin layer
of moisture and cool air from around the product allowing heat to penetrate more quickly.
Cooking times can be shortened and cooking temperatures can be reduced.
To convert standard deck oven recipes, reduce the temperature 50 degrees and the time by 25%.
Make minor adjustments as necessary.
The lower the oven temperature the more even the bake.
Always weigh your product. This will give you a more consistent size, color and quality.
Check the product near the end of the initial cooking cycle by turning on the oven light and looking
through the oven door windows.
Do not open the oven doors during baking as this will change the baking characteristics of the oven
and make it difficult to determine a final program.
If the product is overdone on the outside and underdone on the inside, reduce the baking temperature.
If the product is pulling away from the edge of the pan, the temperature is too high or the cooking
time too long.
The convection is a mechanical piece of equipment. The same control settings will always give the
same results. If the results vary, problems may be because of product preparation.
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OPERATION CONT’D
Loading
When loading and unloading the oven, stage products and racks so the oven doors are
opened for the least amount of time.
Be sure that racks are level within the oven.
Bent or warped pans can greatly affect the evenness of the cook or bake.
If using baker’s parchment, be sure the parchment does not blow over the product.
The will create an uneven bake.
Load each shelf evenly. Spaces should be maintained equally between the pan and
oven walls, front and back.
Do not overload pan’s this will create an uneven bake.
For best baking results, load the oven from the center out during random loading.
CAUTION
CAUTION
ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE FROM
COMBUSTIBLE MATERIALS.
KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY. IF SPILLS
OCCUR, CLEAN IMMEDIATELY, TO AVOID THE DANGER OF SLIPS OR
FALLS.
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WARNING
CAUTION
MAINTENANCE & CLEANING
KEEP WATER AND SOLUTIONS OUT OF CONTROLS. NEVER SPRAY OR
HOSE CONTROL CONSOLE.
MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS
MEMBRANES AND CLOTHING. PRECAUTIONS SHOULD BE TAKEN TO
WEAR RUBBER GLOVES, GOGGLES OR FACE SHIELD AND PROTECTIVE
CLOTHING. CAREFULLY READ THE WARNING AND FOLLOW THE
DIRECTIONS ON THE LABEL OF THE CLEANER TO BE USED.
NOTICE
Never leave a chlorine sanitizer in contact with stainless steel surfaces
longer than 10 minutes. Longer contact can cause corrosion.
Cleaning
• Always start with a cold oven.
• The stainless exterior can easily be cleaned using Lang Mfg. Prime Shine (72804-
41) oven cleaner.
• Always follow the cleaner manufacturer's instructions when using any cleaner.
• Care should be taken to prevent caustic cleaning compounds from coming in
contact with the blower wheel.
• The oven racks, rack slides, and interior may be cleaned using Lang Mfg. Foam
Deluxe (72804-36) oven cleaner.
• Discoloration or heat tint may be removed using Lang Mfg. Carbon Release
(72804-32) oven cleaner.
• Always apply these cleaners when the oven is cold and rub in the direction of the
metal's grain.
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TROUBLESHOOTING
Symptoms
What follows is a chart of Symptoms and Possible Causes to aid in diagnosing
faults with the oven.
Refer to the Symptoms column to locate the type of failure then to the Possible
Cause for the items to be checked.
To test for a possible causes refer to the TEST section and locate the Possible
Cause then refer to test to identify test procedures.
SYMPTOM POSSIBLE CAUSE
Display will not come on.
Oven will not heat
Motor will not run
Product burning
Product under done
• No power to cord outlet
• Oven unplugged from outlet
• Failed power cord or plug
• Failed power switch
• Failed pilot ignition
• Contrast needs to be adjusted
• Failed display board
• No Product selected
• Failed Pilot ignition
• Failed Circuit Board
• Failed Probe
• Failed Module
• Failed Centrifugal switch in Motor
• Failed Motor
• Failed Over-temperature Thermostat
• Failed Valve
• No Product selected
• Failed Pilot ignition
• Failed Motor
• Failed Motor Contactor
• Failed Circuit Board.
• Product is cooked too long
• Failed circuit board
• Failed probe
• Product is not cooking long enough
• Failed circuit board
• Failed probe
UL File# MH19366 Rev. 2003A
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TROUBLESHOOTING CONT’D
NOTICE
WARNING
Service on this, or any other, LANG appliance must be performed by
qualified personnel only. Consult your authorized service station directory
or call the factory at 1-800-224-LANG (5264), or WWW.LANGWORLD.COM
For the service station nearest you.
BOTH HIGH AND LOW VOLTAGES ARE PRESENT INSIDE THIS
APPLIANCE WHEN THE UNIT IS PLUGGED/WIRED INTO A LIVE
RECEPTACLE. BEFORE REPLACING ANY PARTS, DISCONNECT THE
UNIT FROM THE ELECTRIC POWER SUPPLY.
TESTS
If an item on the list is followed by an asterisk (*), the work should be done by a
factory authorized service representative.
Possible Cause TEST
Product is cooked too long
Failed Probe
Failed Circuit Board
Failed Valve
• No test available, operational condition
• Check probe for proper resistance*
• Confirm that board is getting correct voltage*
• Confirm that board is putting out correct
voltage*
• Remove the wires and check for continuity
across the coil*
CAUTION
Failed Centrifugal switch in
Motor
Failed Motor contactor
Failed Motor
Failed or disconnected safety
thermostat
Failed Spark Module
USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY
LANG OR THEIR AUTHORIZED DISTRIBUTORS CAN CAUSE BODILY
INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.
• Remove the wires and check for continuity
across them while motor is turning*
• Remove the wires from the contactor coil and
check for continuity across the contactor coil
connection*
• Ensure the contactor moveable points move
freely up and down*
• Confirm that motor is getting correct voltage*
• Check across the thermostat connectors for
continuity*
• Confirm that Spark Module is getting proper
voltage*
UL File# MH19366 Rev. 2003A
21
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PARTS LIST January 15, 2009
GCCO-PT
DESCRIPTION PART NO.
Motor 1/3 HP 115 Volt 2 Speed 30200-35
Switch Micro Convection Oven Door 30301-02
Switch Toggle On-Off 30303-06
Switch Toggle Spring Return 30303-16
Thermostat Safety 490°F Open
Thermostat 450°F Oven
Terminal Block 24 Position Quick Disconnect 30503-01
Relay 24 VAC 30600-04
Contactor 2 Pole 24 VAC 30701-02
Contactor 2 Pole 30 Amp 24 VAC 30701-05
Power Cord with Molded Plug 31107-02
Cable Ribbon Assembly 31110-13
Transformer 115/24-12 VAC 31400-27
Lamp Socket 31602-04
Lamp Incandescent 250 Volt Clear 31603-09
Oven Lamp Lens (Watch Glass) 31604-01
Oven Lamp Lens Gasket 31604-02
Circuit Board Display 40102-25
Circuit Board Microprocessor 40102-26
Probe Pilot Flame Sensor 41100-07
Probe Temperature Sensor 41100-08
Oven Rack 50200-21
Oven Rack Slide 50200-59
Turnbuckle Assembly 50312-02
Door Left Hand 51100-45
Door Right Hand 51100-46
Panel Label, Platinum 60301-119
Valve Manual Main Water Supply (Steam Units) 70400-02
Valve Manual Water Supply (Steam Units) 70402-08
Valve Solenoid 24/60V Water Supply (Steam Units) 70403-01
Regulator Water Supply (Steam Units) 70404-01
Handle Assembly, Single Handle Oven 70603-15
Knob Thermostat 450°F Oven
Window Assembly, Oven Door 71301-04
Blower Wheel 71500-05
Blower Wheel (Steam Units) 51100-57
Orifice Water/Steam #60 DRL (Steam Units) 80405-01
Burner “U” Tube Steel GCCO-257-W1
Pilot Burner Assembly 80201-14
Pilot Tube 60102-1381
Module Spark Igniter NG & LP 80300-08
Orifice Main Burner .0890 #43 DRL NG 80400-13
Orifice Main Burner .0595 #53 DRL LP 80400-14
Orifice Pilot Burner .010 DRL LP 80401-05
Orifice Pilot Burner .018 DRL NG 80401-10
Valve Combination Gas 24 VAC NG 80505-10
Valve Combination Gas Conversion Kit NG to LP (Includes all orifices) 60101-633
Valve Combination Gas Conversion Kit LP to NG (Includes all orifices) 60101-632
Wiring Harness, Motor GCCO-608
Wiring Harness, 120 Volt GCCO-609
Wiring Harness, 24 Volt GCCO-610
30401-09
30402-27
70701-17
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WIRING DIAGRAM
23
UL File# MH19366 Rev. 2003A
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UL File# MH19366 Rev. 2003A
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