Duke WB302-LP Service Manual Download Page 1

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Reproduction without written permission is prohibited. Duke is a registered

trademark of the Duke Manufacturing Company.

Duke Manufacturing Company

2305 N. Broadway

St. Louis, MO 63102

Phone: 314-231-1130

Toll Free: 1-800-735-3853

Fax: 314-231-5074

www.dukemfg.com

Please read this manual completely before attempting to

install, operate or service this equipment

Service Manual

GAS OPERATED

WETBATH

FOODWARMERS

MODELS

WB302-NAT

WB302-LP

WB303-NAT

WB303-LP

WB304-NAT

WB304-LP

WB305-NAT

WB305-LP

P/N 219218B

Summary of Contents for WB302-LP

Page 1: ...g Company Duke Manufacturing Company 2305 N Broadway St Louis MO 63102 Phone 314 231 1130 Toll Free 1 800 735 3853 Fax 314 231 5074 www dukemfg com Please read this manual completely before attempting to install operate or service this equipment Service Manual GAS OPERATED WETBATH FOODWARMERS MODELS WB302 NAT WB302 LP WB303 NAT WB303 LP WB304 NAT WB304 LP WB305 NAT WB305 LP P N 219218B ...

Page 2: ...ORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE WARNING DO NOT OPERATE THIS EQUIPMENT WITHOUT PROPERLY PLACING AND SECURING ALL COVER AND ACCESS PANELS CAUTION Observe the following Provide and maintain adequate minimum clearances from all walls and combustible materials Provide and maintain adequate clearance for air openings Keep the equipment area free and clear of combustible mat...

Page 3: ... MAINTENANCE 5 Stainless Steel Care and Cleaning 5 Gas Regulators 5 SERVICE INFORMATION TROUBLESHOOTING 6 PARTS REPLACEMENT 7 Gas Valve Replacement 7 Safety Valve Replacement 8 Thermocouple Replacement 8 Pilot Replacement 9 Direct Burn Pilot 9 Safety Valve Pilot 9 Burner Replacement 10 Direct Burn Burner 10 Safety Valve Burner 10 ...

Page 4: ...ts are placed on a firm flat surface floor Check for cracks in flooring or tile and avoid these areas if possible If necessary place support pads properly rated for the weight of the unit to bridge uneven or cracked flooring Level the unit accordingly Stabilizing Use the leg adjustments to insure that the unit is solid to the floor surface at all contact points Insure that the unit does not rock w...

Page 5: ...r best results rub with the grain of the steel Pitting and cracking are early signs of stainless steel breakdown But special stainless steel cleaners can restore and preserve the protective film Ifsignsofbreakdownappear thoroughlyclean and dry all surfaces Begin regular application of a high quality stainless steel cleaner according to the manufacturer s instructions Again always rub with the grai...

Page 6: ...ght Pilot light won t stay lit Flame set too high Drain hose plugged Drain hose loose or disconnected from drain pan REMEDY Turn gas on Direct burn units Light pilot light Replace thermocouple Safety valve units Adjust pilot flame Direct burn units Turn gas valve down Clear drain hose Tighten or connect drain hose TROUBLESHOOTING ...

Page 7: ...e valve CAUTION Do not kink the burner tube when moving it out of the way 6 Remove the valve from the manifold 7 Place gas rated thread sealer on new valve threads Figure 4 Manifold with gas valve 8 Thread the new valve onto the manifold as shown in Figure 4 Make sure it is tight 9 Place gas rated thread sealer on the threads of the valve 10 Reconnect the burner tube 11 Perform pressure check for ...

Page 8: ... not kink the thermocouple 9 Apply gas approved thread sealer to all gas and pilot tube fittings 10 Check for leaks 11 Install the bottom cover 12 Connect the unit to its gas supply 13 Light the pilot light 14 Replace the galvanized burner liner 15 Verify that the burner lights properly Thermocouple Replacement Figure 6 Thermocouple General The thermocouple is connected to the safety valve at one ...

Page 9: ...pilot tube fitting 7 Replace the pilot tube 8 Perform leak test 9 Install the bottom cover 10 Turn the gas supply on 11 Replace the galvanized burner liner 12 Light the pilot 13 Verify that the burner will light correctly Safety Valve Pilot Figure 8 Safety Valve Pilot On units with a safety valve the pilot Figure 8 is connected to the safety valve 1 Shut off the gas supply 2 Remove the galvanized ...

Page 10: ...ube Burner 1 Turn off the gas supply 2 Remove the galvanized burner liner Figure 10 3 Remove the burner from the gas supply tube 4 Replace the burner 5 Turn on the gas supply 6 Light the pilot 7 Verify that the burner lights properly 8 Replace the galvanized burner liner ...

Page 11: ...11 Gas Operated Foodwarmers ...

Page 12: ...Gas Operated Foodwarmers 12 Duke Manufacturing Company 2305 N Broadway St Louis MO 63102 Phone 314 231 1130 Toll Free 1 800 735 3853 Fax 314 231 5074 www dukemfg com P N 219218 ...

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Duke WB302-LP, Service Manual

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