Lennox International Inc GWB9-100IH-2, GWB9-075IH-2, GWB9-050IH-2 Maintenance and Cleaning

MAINTENANCE AND CLEANING

Maintenance As Outlined Below Can Be Performed By Owner Unless Otherwise Noted.

•The acidic nature of flue gasses condensing on aluminum boiler sections may cause formation of aluminum oxide. This oxide formation is normal, is generally uniform throughout boiler sections, and represents negligible mass of aluminum that is consumed by oxidation during life of the boiler.

•If left unchecked, this buildup may eventually cause blockage of flue gas passages in boiler sections, reducing efficiency, and ultimately shutting down the boiler due to lack of combustion air flow.

•Regular service and maintenance by a qualified service agency must be performed to assure safe trouble free operation and maximum efficiency.

2.Check boiler area is free from combustible materials, gasoline, and other flammable vapors and liquids.

3.Circulator pump and blower motor furnished with boiler are permanently lubricated from factory and require no further lubrication. Additional or non-factory supplied pumps and/or motors should be lubricated according to the pump and/or motor manufacturer’s instruction.

Daily During Heating Season

1.Check for and remove any obstruction to the flow of combustion air or venting of flue gases.

2.Check boiler area is free from combustible materials, gasoline, and other flammable vapors and liquids.

Beginning Of Each Heating Season

1.Annual service call by qualified service agency, which includes:

A.Examine flue passages between boiler sections, burner, and condensate lines, and clean if necessary following “Annual Examination And Cleaning Of Boiler Components” on page 46.

B.Visually inspect venting and air intake system for proper function, deterioration or leakage. If vent or air intake show any signs of deterioration or leakage, repair or replace them, immediately. Insure proper reassembly and resealing of vent and air intake system

C.Check for and remove any obstruction to flow of combustion air or venting of flue gases. Check air baffle located inside 1½” x 2” flexible coupling on mixer, clean if necessary and make sure to put it back. Refer to repair parts diagram of mixer and pressure switch assembly for exact location.

D.Follow instructions for“Operating Instructions” on page 38.

E.Follow instructions for“Check Out Procedure and Adjustment” on page 42.

F.Visually inspect condensate drain lines for proper operation and deterioration. Check for plugged condensate drain lines.

G.Check silicone rubber seals between boiler sections. Insure that there are no leaks. Use RTV silicone rubber adhesive sealant rated for at least 400° F to replace or repair seals in locations where original seals have deteriorated.

H.Check all gasketed joints for leakage, and tighten bolts or replace gaskets if necessary.

I.Remove jacket front and top panels and check for piping leaks around relief valve and other fittings. Repair, if found. DO NOT use stop leak compounds.

Monthly During Heating Season

1.Remove jacket front and top panels and check for piping leaks around relief valve and other fittings. If found, contact qualified service agency to repair. DO NOT use stop leak compounds.

2.Test relief valve. Refer to valve manufacturers instructions packaged with relief valve.

3.Visually inspect venting and air intake system for proper function, deterioration, or leakage. If vent or air intake show any signs of deterioration or leakage, contact a qualified service agency to repair or replace immediately and to insure proper reassembly and resealing of vent and air intake system.

4.Visually inspect clear vinyl condensate lines and PVC condensate drain pipe for proper operation, leakage, and deterioration. If condensate lines or drain pipe show any signs of blockage, leakage, or deterioration contact a qualified service agency to clean, repair, or replace them immediately.

Periodically During Heating Season

Where low water cutoffs are used, periodic inspection of low water cut off is necessary, including flushing of float type devices. Refer to low water cut off manufacturer’s specific instructions.

End of Each Heating Season - Annual Shutdown Procedure

Follow instructions “To Turn Off Gas To Appliance” on page 38.

If heating system is to remain out of service during freezing weather, and does not contain antifreeze, drain system completely. If boiler will be exposed to freezing temperatures, drain condensate lines. Otherwise, do not drain system or boiler.

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