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

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14 - OPERATING YOUR BOILER

AUTOMATIC GAS VALVE

Automatic Gas Valve opens or closes according to heat requirements of thermostat and temperature limit control. It closes if pilot goes out. Each individual control must be operating correctly before any gas can pass to burners. Any one control can hold gas supply from burner regardless of demand of any other control.

SAFETY PILOT

Safety Pilot prevents flow of gas to burner if pilot goes out, or will not ignite.

GAS VALVE SAFETY SHUTDOWN TEST

Ignition system safety shutoff device must be tested after placing boiler in operation.

RELIGHT

Electric and gas shall be off for 5 minutes before relighting.

THERMOSTAT

Keep it set at desired room temperature. If windows are to be opened or heat is not needed, move thermostat pointer to lower setting.

NOTICE

In event of failure of any component, system will not operate or will go into safety lockout. System is completely self-checking. On every call for heat, each component must be functioning properly to permit operation. Safety lockout system has to be reset by turning thermostat to lowest setting for one minute, then back to normal setting.

Figure 16 - Pilot Flame

MAIN BURNER(S)

•Main burners do not require primary air adjustment and are not equipped with primary air shutters.

•Main burner flames form sharp blue inner cones in softer blue outer mantel, with no yellow.

•Puffs of air from blowing on flame or stamping on floor will cause flames to turn orange momentarily. This is not unusual. Remain still when observing main burner flames.

•If flame appearance is not correct, check main burner orifices, burner throat and flame ports for dust and lint obstruction. It may be necessary to remove rollout shield to observe main burner flames. Replace rollout shield after observation. Refer to Figure 17.

Figure 17 - Burner

ADJUST PILOT BURNER

Pilot flame should surround 3/8” to 1/2” of the pilot sensor. See Figure 16. If flame needs adjusting, do it as follows:

1.Remove screw cover over pilot adjusting screw.

2.Insert small screwdriver and adjust flame as needed. Turn screw counterclockwise to increase flame, clockwise to decrease.

3.Replace screw cover over pilot adjusting screw.

ADJUST LIMIT CONTROLS

Instructions for each control are included with controls. Settings can be changed. Refer to Appendix A page 27 for information.

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Contents GAS-FIRED HOT Water Boilers Product LiteratureDimensions DimensionsInch Boiler Model Number Flue Diameter WidthBoiler Ratings and Capacities Ratings and CapacitiesBoilers for USE AT High Altitude Table of Contents Minimum Clearances to Combustible Installation ProcedureRoom Cubic Feet Volume Minimum Room Volume, Indoor Air OnlyVentilation & Combustion AIR CanadaRelief Valve Discharge Line Connecting Supply and Return PipingCheck local DischargeFor USE with Cooling Units Temperature Pressure GaugeTypical Hot Water Piping Bypass Piping Circulator on Supply Chimney and Vent Pipe Connection Connecting The Vent Damper And Vent ConnectorCheck Your Chimney Chimney SizingRemoving Existing Boiler From Common Venting System Minimum Vent Pipe ClearanceVent Damper Manual Operation Vent Damper InstallationGas Pipe Sizes GAS Supply PipingCheck GAS Supply Checking GAS PipingVent Damper Wiring Electrical WiringElectric Power Supply Thermostat InstallationIntegrated High Limit Electronic Ignition Control Wiring DiagramsWiring Diagrams Integrated High Limit Electronic Ignition Control Filling System with Water General InstructionsLight this burner by hand Lighting InstructionsDo not use this appliance if any part has To Turn OFF GAS to ApplianceOperating Your Boiler Check Thermostat Operation Maintaining Your Boiler If Your System is not Heating or not Giving Enough Heat Service HintsPossible Cause What to do If Burner is NoisyEquipment and Optional Accessories Blocked Vent Safety Switch Blocked Vent Safety Shutoff Rollout Switch Flame Rollout Safety ShutoffAdjusting Settings Installation Environment ConsiderationsAppendix a Control Module Electrical ConnectionsOperation State Codes OperationBoiler High Limit Temperature Controller TroubleshootingTroubleshooting Error Codes Definition ErrorIntermittent Pilot StepCorrect 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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