Lennox International Inc GWB8-299E-2, GWB8-262E-2, GWB8-280E-2, GWB8-245E-2 Maintaining Your Boiler

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15 - MAINTAINING YOUR BOILER

BURNERS

Beginning of heating season visually check pilot and main burner flames. See Figure 16.

SAFETY RELIEF VALVE

Refer to page 7 for important information. To test safety relief valve refer to valve manufacturer’s instructions packaged with relief valve. Call Technical Support if

manufacturer’s instruction are not located.

EXPANSION TANK

Tank may become waterlogged, or may receive excess of air. Frequent automatic opening of safety relief valve indicates water logging. High boiler temperature accompanied by unusually low radiation unit temperature (and “knocking”) indicates excess air in tank.

To correct:

1.Close valve between boiler and tank. Drain tank until empty.

2.Check all tank plugs and fittings. Tighten as necessary.

3.Open valve between boiler and tank. Water will rise to normal height in tank if you have automatic fill valve (otherwise, manually refill system).

BOILER FLUE PASSAGES

Recommend following checked annually by qualified service agent.

•flue passages

•burner adjustment

•operation of controls

Before start of each season (or whenever system has been shut down for some time) recheck whole system for leaks and recheck boiler and vent pipe for leaks. Replace or patch any boiler seals that are faulty.

VENT PIPE

Venting and piping should be checked at least once a season. If vent piping shows any sign of leaking, replace immediately.

WATER SYSTEM

If system is to remain out of service during freezing weath- er, always drain it completely (water left in to freeze will crack pipes and/or boiler).

CLEANING YOUR BOILER AND BURNERS

Flue passages between sections should be examined yearly and cleaned if necessary.

To clean:

•Remove burners, pilot, and vent pipe.

•Remove top and front jacket panels.

•Remove two screws attaching intermediate front panel to left and right side jacket panels.

•Remove draft diverter and intermediate front panel together.

•Carefully remove cerafelt gasket strips.

•Clean passageways between sections with flexible handle wire brush. Remove dirt from bottom of boiler and from between sections by vacuuming.

•Verify all flame ports in burners are open and clear. Shake out or blow out all loose dirt in burners.

•Reseal seams between adjacent sections as necessary with 400° F RTV silicone sealant.

•Reassemble all parts.

•Verify tightness of pilot connections and condition of burner flames after reassembly. See Figures 16 and 17, pages 21.

•Verify vent pipe connections to chimney are secure and no obstructions are present.

HOUSEKEEPING

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

•Keep boiler area clear of debris and other materials obstructing flow of combustion and ventilation air.

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Contents GAS-FIRED HOT Water Boilers Product LiteratureBoiler Model Number Flue Diameter Width DimensionsDimensions InchBoilers for USE AT High Altitude Boiler Ratings and CapacitiesRatings and Capacities Table of Contents Minimum Clearances to Combustible Installation ProcedureCanada Minimum Room Volume, Indoor Air OnlyRoom Cubic Feet Volume Ventilation & Combustion AIRDischarge Connecting Supply and Return PipingRelief Valve Discharge Line Check localFor USE with Cooling Units Temperature Pressure GaugeTypical Hot Water Piping Bypass Piping Circulator on Supply Chimney Sizing Connecting The Vent Damper And Vent ConnectorChimney and Vent Pipe Connection Check Your ChimneyRemoving Existing Boiler From Common Venting System Minimum Vent Pipe ClearanceVent Damper Manual Operation Vent Damper InstallationChecking GAS Piping GAS Supply PipingGas Pipe Sizes Check GAS SupplyThermostat Installation Electrical WiringVent Damper Wiring Electric Power SupplyIntegrated High Limit Electronic Ignition Control Wiring DiagramsWiring Diagrams Integrated High Limit Electronic Ignition Control Filling System with Water General InstructionsTo Turn OFF GAS to Appliance Lighting InstructionsLight this burner by hand Do not use this appliance if any part hasOperating Your Boiler Check Thermostat Operation Maintaining Your Boiler If Burner is Noisy Service HintsIf Your System is not Heating or not Giving Enough Heat Possible Cause What to doEquipment and Optional Accessories Blocked Vent Safety Switch Blocked Vent Safety Shutoff Rollout Switch Flame Rollout Safety ShutoffElectrical Connections Installation Environment ConsiderationsAdjusting Settings Appendix a Control ModuleOperation State Codes OperationTroubleshooting Error Codes Boiler High Limit Temperature ControllerTroubleshooting Step ErrorDefinition Intermittent PilotCorrect Pilot Flame 3/8 to 1/2 inch in flame. See , Troubleshooting Pilot FlameLennox Industries Inc. Dallas, Texas
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GWB8-299E-2, GWB8-245E-2, GWB8-280E-2, Gas-Fired Hot Water Boiler, GWB8-262E-2 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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