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GAS OPERATED
WETBATH
FOODWARMERS
MODELS
WB302-NAT
WB303-NAT
WB304-NAT
WB305-NAT
Please read this manual completely before attempting to
This manual is Copyright 2011 Duke Manufacturing Company. All rights reserved.
Reproduction without written permission is prohibited. Duke is a registered
WB302-LP
WB303-LP
WB304-LP
WB305-LP
install, operate or service this equipment
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
Service Manual
P/N 219218B
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Summary of Contents for Duke WB302-NAT
- Page 1 Please read this manual completely before attempting to install, operate or service this equipment This manual is Copyright 2011 Duke Manufacturing Company. All rights reserved. Reproduction without written permission is prohibited. Duke is a registered trademark of the Duke Manufacturing Company.
- Page 2 Gas Operated Foodwarmers IMPORTANT WARNING AND SAFETY INFORMATION WARNING READ THIS MANUAL THOROUGHLY BEFORE OPERATING, INSTALLING OR PERFORM- ING MAINTENANCE ON THE EQUIPMENT. WARNING FAILURE TO FOLLOW INSTRUCTIONS IN THIS MANUAL CAN CAUSE PROPERTY DAMAGE, INJURY OR DEATH. WARNING DO NOT USE OR STORE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.
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Page 3: Table Of Contents
Gas Operated Foodwarmers TABLE OF CONTENTS SPECIFICATIONS ..........................4 INSTALLATION ...........................4 Location ..........................4 Leveling ..........................4 Stabilizing ..........................4 Gas Connection ........................4 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... -
Page 4: Specifications
Gas Operated Foodwarmers INSTALLATION Leveling Be sure that the units are placed on a firm, flat Location surface/floor. Check for cracks in flooring or tile and avoid these areas if possible. If necessary The unit represented in this manual is intended for place support pads, properly rated for the weight indoor use only. -
Page 5: Maintenance
Gas Operated Foodwarmers MAINTENANCE WARNING Stainless Steel Care and Cleaning THE GAS SUPPLY MUST BE TURNED OFF AND DISCONNECTED AT ALL Stainless steel contains 70-80% iron, which will rust. It also contains 12-30% chromium, which forms an TIMES DURING MAINTENANCE OR invisible passive film over the steel surface and acts REPAIR FUNCTIONS. -
Page 6: Service Information / Troubleshooting
Gas Operated Foodwarmers TROUBLESHOOTING CAUSE REMEDY SYMPTOM Unit won’t light Turn gas on (Direct burn units) Cabinet too cold Unit won’t light Light pilot light Pilot light won’t stay lit Replace thermocouple (Safety valve units) Adjust pilot flame (Direct burn units) Flame set too high Turn gas valve down Cabinet too warm... -
Page 7: Parts Replacement
Gas Operated Foodwarmers PARTS REPLACEMENT Gas Valve Replacement. Figure 4. Manifold with gas valve Figure 3. Location of gas valves 8. Thread the new valve onto the manifold as General shown in Figure 4. Make sure it is tight. 9. Place gas rated thread sealer on the threads The gas valve is located in front on the control of the valve. -
Page 8: Safety Valve Replacement
Gas Operated Foodwarmers Safety Valve Replacement 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 5. Safety Valve General Figure 6. -
Page 9: Pilot Replacement
Gas Operated Foodwarmers 10. Light the pilot. 11. Replace the galvanized burner liner. Safety Valve Pilot 12. Verify the burner lights properly. Pilot Replacement Direct Burn Pilot Figure 8. Safety Valve Pilot On units with a safety valve the pilot, Figure 8, is connected to the safety valve. -
Page 10: Burner Replacement
Gas Operated Foodwarmers Burner Replacement 1. Turn off the gas supply. 2. Remove the galvanized burner liner, Figure Tube Burner 3. Remove the burner from the gas supply tube. 4. Replace the burner. 5. Turn on the gas supply. 6. Light the pilot. 7. - Page 11 Gas Operated Foodwarmers...
- Page 12 Gas Operated Foodwarmers 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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