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

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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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Contents Installation Instructions Boiler Dimensions Introduction IntroductionGeneral Important Safety InformationNet Ahri Rating Shipping Flue Diameter SEA Level Ratings Natural and Propane Gases90 50/75/100 Series 2 Natural GAS Boilers for USE AT High Altitude United States Installations43331093 43331096 90 50/75 Series 2 Propane GASBefore Installing the Boiler Boiler SizingBoiler Location Considerations Locating The Boiler Boiler InstallationCombustion Air And Vent Pipe Requirements Extreme cold climate areas, use ¾ Armaflex or equivalentBoiler is not to be installed on carpeting Install boiler on level surfaceCondensate Drain Requirements Foundation RequirementsClean the System First Near Boiler PipingSupply And Return Lines Single Zone Boiler Piping Two Zone Boiler Piping With Zone Valves Multi-Zone SystemsTwo Zone Boiler Piping With Circulators Page Page Page Safety Relief Valve Expansion Tank And Make-Up WaterTerminate pipe with plain end not threaded Diaphragm Type Expansion Tank Piping Conventional Closed Type Expansion Tank Piping Condensate Drain Piping Reinstall vent drain lineFilling Condensate Trap With Water Chilled Water PipingConnections And Termination Combustion AIR and Vent PipeExample Elbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipeBoiler Size InstallationRoof Vent / Intake Terminations Vent AIR IntakeLess Than 12 Clearance CombustionVent Air Concentric Vent TerminationsFeet minimum total equivalent length for all models Combustion Air and Vent Piping Boiler ConnectionsGAS Supply Piping Connecting The Gas PipingCheck Gas Supply Leak Check Gas Piping625,000 Gas Pipe Sizes445,000 365,000Electric Power Supply Electrical WiringThermostat Installation Connect Circulator Pump WiringWiring Schematic Ladder Wiring Diagram Page Ladder Diagram for Figure Controls and Accessories Drain Valve Casting Temperature Safety SwitchDraft Inducer Circulator PumpStart UP To Turn Off Gas To Appliance Operating InstructionsS9381A Integrated Boiler Control Operation and Adjustments User Parameters Adjusting SettingsDisplay State Code Definitions Sequence of Operation Check OUT Procedure and Adjustment Review All Instructions Set Thermostat To Desired Room TemperatureVR8205 Maintenance and Cleaning Annual Examination And Cleaning Of Boiler Components Igniter wires Gas valve wiresRemove draft inducer and gasket from top of flue connector Initial Service Checks TroubleshootingError Codes Boiler Differential Pressure Differential AIR Pressure Switch CheckAluminum Series Clean System First Fill Water and ChemistryEliminate System Leaks General Guidelines When Using Antifreeze Antifreeze Products Boiler Model Serial # Date Installed Measured BTU/HR input Installation and CHECK-OUT CertificatePage Lennox Industries Inc. Dallas, Texas
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GWB9-050IH-2, GWB9-100IH-2, GWB9-075IH-2, Gas-Fired Hot Water Boiler specifications

Lennox International Inc. is a prominent player in the HVAC industry, renowned for its innovative solutions and high-efficiency products. Among its standout offerings is the GWB8 Gas-Fired Hot Water Boiler, available in various models including GWB8-262E-2, GWB8-245E-2, GWB8-280E-2, and GWB8-299E-2. These units are designed to provide reliable and efficient heating solutions for residential applications.

One of the key features of the GWB8 series is its energy-efficient operation. These boilers are designed to achieve an AFUE (Annual Fuel Utilization Efficiency) rating of up to 84%, allowing homeowners to save on energy costs while reducing their environmental footprint. The product utilizes a cast-iron heat exchanger, which promotes optimal heat retention and distribution, ensuring consistent performance throughout the heating season.

The GWB8 series incorporates advanced technologies to enhance comfort and efficiency. A significant innovation is the use of a power venter system that facilitates venting through the sidewall of the home, providing installation flexibility while maintaining safety standards. Additionally, the boilers are equipped with a Honeywell integrated control for precise temperature management and modulating gas valve technology, which adjusts the gas flow to match the heating demand, further optimizing fuel consumption.

Another defining characteristic of the GWB8 models is their durable construction. Designed to withstand the rigors of heating applications, these models feature a robust, powder-painted steel cabinet that helps prevent rusting and corrosion. The access doors are insulated, contributing to overall efficiency while allowing easy maintenance and serviceability.

The GWB8 series is also designed with homeowner comfort in mind. The quiet operation of these boilers ensures that they blend into the living environment without disruptive noise, making them an ideal choice for residential settings. The models are compatible with various heating systems, including hydronic heating, making them versatile and reliable.

Overall, Lennox's GWB8 Gas-Fired Hot Water Boiler series is an excellent choice for homeowners seeking efficient, durable, and reliable heating solutions. With a combination of advanced technologies, energy-efficient performance, and practical features, these boilers set a high standard for residential heating systems in today's market.
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