Service Manual for the Lang Models
Contents
1. CONTROLS There are very few controls that operate the gas Cheese Melter Below is a list of the various components with a description of their purpose Manual On Off Valve HE Pipe Union H Electric Solenoid Fower and Constant Auto Switches Pilot Burner Adjuster Regulator Ji These components 4 and 5 Foot Models Only Product Rack Switch Power Switch Turns the unit On and Off Constant Auto Switch When set to Constant the burner s will light and stay on When set to Auto the burner s will light whenever a product is placed onto the Tilting Product Rack Manual Gas Valve This valve turns off the flow of gas to the burner s Once the machine is installed this valve need not be turned off as the Power Switch should be utilized to shut the machine down The manual gas valve cannot be used to regulate the heat output from the burner s it must be full On or full Off Tilting Product Rack The Tilting Product Rack is used to adjust the amount of heat a product is exposed to and to start the burner s when the machine is placed into the Auto mode Raising the Tilting Product Rack increases the heat on the product while lower the rack decreases the heat OPERATING DO s and DON Ts DO Insure all dishes placed in the cheesemelter are oven safe Pre heat pans in the cheesemelter or on a stove Turn products halfway through cooking as needed Use the unit in Automatic as much as2. Service Manual for the Lang Models 0 2 10 3 0 2 10 4 0 2 10 5 Lang Manufacturing Company 6500 Merrill Creek Parkway Everett WA 98203 Phone 1 800 224 5264 Fax 1 425 349 2733 www langworld com Copyright 2000 JE P np ok ook CHAPTER PAGE TABLE Or GOING INS as 1 READ FIRST tata TATE e AEAEE RAEAN ATSR 2 BOUT MENS DESCRIP 4 INSTALLA ON pita n ii po tata kt tek a EEE eka e ae e e Fa AA 5 yi din e n a e a l ar Ga n tn a kn a pet en nt r GENERAL OFE FANON 8 SEQUENCE OF a a ot os kb sy 10 5 11 JE GHANMO Aka kon an an 13 WIRING 14 FARTS 8 ti op kn ey a a st e kt andes et k a t kk ik a a 15 IMPORTANT CAUTION CAUTION CAUTION DANGER WARNING WARNING WARNING NOTICE NOTICE NOTICE READ FIRST EACH IS HEAVY FOR SAFE HANDLING INSTALLER SHOULD OBTAIN HELP AS NEEDED OR EMPLOY APPROPREATE 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 OVEN WILL BE LOCATED MUST BE DESIGNED TO SUPPORT THE WEIGHT OF THE OVEN SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP B
3. OF CONTROLS NEVER SPRAY OR HOSE CONTROL CONSOLE ELECTRICAL CONNECTIONS ETC CAUTION ALWAYS KEEP THE AREA NEAR THE APPLIANCE aa an FREE FROM COMBUSTIBLE MATERIALS CAUTION KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY IF SPILLS OCCUR CLEAN IMMEDIATELY TO AVOID THE DANGER OF SLIPS OR FALLS CAUTION 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 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 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 CAUTION 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 2 Electrical Hazard GAS MELTER EXTERIOR gt The melter dimensions are 28 71cm High 21 53cm Deep 36 48 60 91cm 122cm 152cm wide dependent on the actual model number gt The
4. Sides Bottom and Rear wall are constructed stainless steel The melter cavity is insulated with high temperature insulation for efficiency and reduced heat loss INTERIOR gt The interior of the melter has one rack that can be placed in 4 different positions gt The interior of the melter has a rack sensitive micro switch for quick and easy activation CONTROLS AUTOMATIC gt Main burner will only come on when the rack sensitive micro switch is activated If there is nothing on the rack the melter is in a standby mode with only the pilot light on CONTINUOUS gt Main burner is on all the time NSTALLATION RECEIVING THE MELTER 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 1s discovered upon unpacking make a written request for inspection by the carrier s agent within 15 days of delivery packing material should be kept for inspection Do not return damaged merchandise to Lang Manufacturing Company File your claim with the carrier Prior to un crating move the melter as near its intended location as practical The crating will help protect the unit from the physical damage normally associated with moving it through hallways and do
5. possible use Constant during peak periods DON T Do not use the cheesemelter as a cooking or baking device it is best suited for finishing dishes immediately prior to serving Do not use the unit to heat or thaw chilled or frozen product Do not place aluminum foil on the rack or bottom shelf This will reflect heat and expose components to unnecessary high temperatures Do not move rack from one position to another without hand protection Power switch turned to on 120 VAC to Solenoid valve Pilot lit manually Pilot confirmed through flame switch 120 VAC to Constant Auto switch Auto Constant switch to Auto position 120 VAC to Rack sensitive to shelf switch Rack switch activated gt Main burner ignition Auto Constant switch to Constant position gt Main burner ignition 10 NO POWER PROBABLE CAUSE CORRECTIVE ACTION Defective outlet gt Confirm that outlet is putting out 120 VAC single phase Tripped Circuit Breaker gt Confirm that breaker is set in proper position Defective Power Cord gt Confirm that power cord has continuity through it Defective Power Switch gt Confirm that power switch is operating correctly NO PILOT Plugged orifice gt Clean plugged orifice gt Replace if necessary Faulty regulator gt Clean air vent located on the top of the regulator behind W C adjustment gt Replace if necessary Incorrect Wat
6. 00 12 60101 18 70402 05 70402 06 70402 07 70602 06 70701 43 80005 01 80005 02 80100 10 80100 11 80201 20 80401 09 80401 11 80404 03 80404 09 80404 13 80404 16 80404 23 80404 24 80404 27 80404 28 80501 01 80501 03 80502 01 80506 04
7. 1 8 inch NPT tap is provided on the main manifold for checking regulator pressure 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 10 000 BTU hr per foot of Cheese Melter A 1 2 inch NPT connection is provided at the lower right rear corner A gas shut off valve must be installed to the appliance 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 3 45 kPA 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 3 45 kPA Test for gas leaks Use a commercial leak detector or a soap and water solution STALLATION CON COUNTER INSTALLATION Legs must be installed on this appliance if it is to be configured as a counter top model Attach the legs to the body by screwing the threaded stud of the leg into the nut insert provided under each bottom corner of the machine Tighten each leg with a wrench Adjust the legs so that burners are level Leg adjustment is made by turning the adjustable foot at the bottom of each leg Ensure that the leg does not turn while a
8. ACK WHEN CUT THIS APPLIANCE MUST BE GROUNDED AT THE TERMINAL PROVIDED FAILURE TO GROUND THE APPLIANCE COULD RELUT IN ELECTOCUTION AND DEATH INSTALLATION OF THE UNIT MUST BE DONE BY PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY AND PLUMBING IMPROPER INSTALLATION CAN CAUSE INJURY TO PERSONNEL AND OR DAMAGE TO EQUIPMENT UNIT MUST BE INSTALLED IN ACCORDANCE WITH ALL APPLICABLE CODES BEFORE LIGHTING USE A SOAP AND WATER SOUTION TO TEST ALL JOINTS FOR GAS LEAKS DURING INITIAL USE OR AFTER SERVICE IF PILOT DOES NOT IGNITE ON FIRST TRY THE MAIN GAS VALVE MUST BE TURNED OFF FOR AT LEAST FIVE MINUTES The data plate is located left side of unit behind control door The melter voltage gas specs serial number pipe size 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 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 IMPORTANT I bb HIGH VOLTAGE Electrics Hassard Electrical Hassard IMPORTANT READ FIRST IMPORTANT KEEP WATER AND SOLUTIONS OUT
9. ILOT LAMP O SHELF SWITCH 51100 12 WIRE NUT 14 0 2 10 3 0 2 10 4 0 2 10 5 DESCRIPTION GAS CHEESE MELTER ee switch Toggle On Off Pilot Light 208 240V 6 Lead Black Body Spring Regulator LP spring Regulator NG Micro Switch Assembly Pilot Burner Assembly Mod Kit Before D 52897 Valve Manual Main Burner 4ft amp 5ft Units Valve Manual Gas Pilot Burner Valve Manual Main Burner 3ft Units Catch Magnetic Door Knob Gas On Off Chrome Infrared Gas Burner 15 5 16 Long 4ft amp 5ft Units Infrared Gas Burner 26 7 8 Long 3ft amp 5ft Units Manifold Gas Melter 3ft 4ft amp Units Manifold Gas Melter 4ft amp 5ft Units Pilot Burner Assembly After D 52897 Orifice Pilot Burner 010 DRL LP Orifice Pilot Burner 021 DRL NG Orifice Gas Spud 42 DRL NG 30k for 26 7 8 Burner Orifice Gas Spud 48 DRL NG 20k for 15 5 6 Burner Orifice Gas Spud 52 DRL LP 30k for 26 7 8 Burner Orifice Gas Spud 55 DRL LP 20k for 15 5 6 Burner Orifice Gas Spud 45 DRL NG for 15 5 16 Burner Chili s Units Only Orifice Gas Spud 38 DRL NG for 26 7 8 Burner Chili s Units Only Orifice Gas Spud 54 DRL LP for 15 5 16 Burner Chili s Units Only Orifice Gas Spud 50 DRL LP for 26 7 8 Burner Chili s Units Only Regulator Gas Set 6 NG Regulator Gas Set 10 LP Valve Solenoid Gas 120 VAC Flame Switch 36 Long Capillar PART NO 30303 06 31601 01 51001 10 51001 11 511
10. djusting the foot WALL HUNG INSTALLATIONS The illustration below shows the connection points for the gas and electrical and how the wall bracket is to connect to the Cheese Melter The heat shield is shipped in the 4 inch space at the rear of the machine Instructions for installing the heat shield are provided with the shield Follow the instructions carefully It is important to remember to remove the knockouts from the front edge of the machine after the heat shield is installed Minimum clearance from the cooking surface below to the bottom of this appliance is 17 inches A wall hanging bracket is provided It is shipped in the 4 inch space at the rear of the machine Attach the bracket to the wall studs then hang the machine on the bracket Burner Wall Mount Bracket Tilting Product Wall Rack Drop Down Gas Connection Control Door 122 NPT i Heat Shield Electrical Connection 115 1 Amp 1 2 3 4 5 6 7 GAS MELTER Verify connections at plug and terminal block Incoming Volt Single Phase LI Gas pressure is set for 6 WC Natural Gas 10 WC Propane Ensure that the regulator is installed in the correct direction Ensure Melter burners are level Confirm that on wall mount units installed over high heat sources that heat shield provided with all wall mount units 1s installed and minimum distance is 22 Ensure that burner flame 15 stable and not lifting o
11. er Column gt Set regulator for correct W C 6 for NG 10 for LP 11 NO BURNER PROBABLE CAUSE CORRECTIVE ACTION Auto Constant switch in gt Confirm that in Constant position that main burner activates incorrect position gt Confirm that in Auto position that main burner activates only when product is placed on the rack gt Replace as necessary gt Clean air vent located on the top of the regulator behind W C adjustment gt Replace if necessary Faulty regulator Plugged Main orifice gt Clean plugged orifice gt Replace if necessary Incorrect Water Column gt Set regulator for correct W 6 for NG 10 for LP Faulty Solenoid valve gt Check for 120 VAC 1100 Q on valve gt Replace if necessary Low pilot gt Adjust pilot screw on the manifold right next to regulator gt Clean orifice gt Replace if necessary Faulty flame switch gt Confirm that pilot is strong and that flame sensor is red gt Replace if necessary Plugged or cracked tile gt Replace tile assembly assembly 12 CHNICAL DAT MELTER LINE AMPERAGE AND WATTAGE Model Number of Number NG LP Connections 30 000 40 000 50 000 13 RING DIAGRAM GAS MEL 80502 01 SOLENOID VALVE Cd 0 2 10 3 NET e n FLAME SWITCH 80506 04 WHITE y 1 BLACK QO Q POWER SWITCH CUNT AUTU SWITCH 30303 06 30303 06 OP L GROUND LUG P
12. ff of burner Flame should be tight against burner and have orange tips Ensure that spark electrode does not continue to spark after ignition The tip of the spark electrode and sensor electrodes must have flame on them and glowing red Model Date Serial Store Tech Name Contact Company Store Phone Service Company Phone Address GENERAL The Lang Gas Cheesemelter can be used to poach saut and brown In addition to melting cheese on sandwiches French onion soup hot apple pie and casseroles it may be used for finishing Italian Mexican and au gratin dishes utilizing less energy than conventional broilers The product is heated with 1650 of infrared heat which penetrates the product preventing burning and scorching The rack is counterbalanced so that maximum heat is supplied only when the product is placed in the rack Although the heating elements are not directly controlled to regulate heat the exposure of the product to heat is adjustable Heat adjustment may be obtained by raising and lowering the rack position The shelf positions provide a choice of cooking positions for a variety of applications The top position is very hot and can be used for quick browning and toasting with the heat decreasing at each lower position In order to change positions simply slide the rack in and out of the slots provided Make sure that the end of the rack engages the sliding mechanism located on the right front corner
13. orways 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 Each appliance requires a 115 volt grounded supply at amp Supply wire size must be large enough to carry the amperage load for the number of appliances being installed Wire size information can be found on the data plate GAS CONNECTION This appliance must be installed under a ventilation hood The installation of any components such as vent hoods grease extractors fire and smoke detection devices or fire extinguisher systems must conform to N F P A Standard 96 latest edition To prevent the function of this appliance from being affected by a reduced atmospheric pressure adequate make up air in the kitchen should be provided to replace the air taken out by the ventilating system 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 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 regulator on this appliance is set to 6 inches water column for natural gas and 10 inches water column for propane A
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