Lochinvar 399 Appliance Area, Water Circulating Pump, Flue Gas Passageways Cleaning Procedures

Hydronic Heating Boilers and Domestic Water Heaters

CLEANING AND

MAINTENANCE

Listed below are items that must be checked to ensure safe reliable operations. Verify proper operation after servicing.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

Appliance Area

Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Water Circulating Pump

Inspect pump every six months and oil as necessary. Use SAE

30non-detergent oil or lubricant specified by pump manufacturer.

Lifting Flames: The usual causes for lifting flames are over firing the burner(s), excessive primary air, or high draft.

If you observe improper flame patterns, examine the venting system, ensure proper gas supply, and ensure adequate supply of combustion and ventilation air.

Flue Gas Passageways Cleaning Procedures

Any sign of soot around the outer jacket, at the burners or in the areas between the fins on the copper heat exchanger indicates a need for cleaning. The following cleaning procedures must only be performed by a qualified serviceman or installer. Proper service is required to maintain safe operation. Properly installed and adjusted units seldom need flue cleaning.

IMPORTANT: All gaskets on disassembled components must be replaced with new gaskets on reassembly. Gasket kits are available from your distributor.

Burner Flames

Visually check main burner flames at each start up after long shutdown periods or at least every six months. Burner viewports are located on the right and left sides of the unit.

FIG. 55 Flame Pattern Illustration

Normal Flame: A normal flame is blue with slight yellow tips, has a well-defined inner cone, and displays no lifting flames.

Yellow Tips: The usual causes for yellow tips on the burner flame are burner air flow blockage or partial obstruction.

Yellow Flames: The usual causes for yellow flames are primary air flow blockage to the burner(s) or excessive gas input. Correct this condition immediately.

Burner Removal and Cleaning

1.Turn off main power to unit.

2.Turn off main manual gas shutoff to unit.

3.Remove the front outer jacket panels.

4.Disconnect manifold from gas train using union(s) just below each gas valve(s).

5.Remove mounting screws from manifold mounting brackets. Pull the manifold/orifice assembly away from burners. Repeat for each manifold assembly.

6.Remove two mounting screws from burner and slide burner out toward front of unit. Use caution to prevent damage to burners, refractory, hot surface igniter or wiring.

7.Remove soot from burners with a stiff bristle brush. Dirt may be removed from burner ports by rinsing the burner thoroughly with water. Drain and dry burners before re- installing. Damaged burners must be replaced.

When installed in a dusty and dirty location, the burners may require cleaning on a 3 to 6 month schedule or as needed, based on severity of contamination. Contaminants can be drawn in with the combustion air. Non-combustible particulate matter such as dust, dirt, concrete dust or dry wall dust can block burner ports and cause non-warrantable failure. The standard inlet air filter will help eliminate dust and dirt from entering the unit. Use extreme care when operating a unit for temporary heat during new construction. The burners could require a thorough cleaning before the unit is placed in service.

56