Lennox International Inc Comprehensive Review of the GWB9-100IH-3 Gas-Fired Hot Water Boiler
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NEAR BOILER PIPING

Clean the System First

Before connecting boiler to heating system, clean and flush system thoroughly. Verify system is free of sediment, flux and any residual boiler water additives.

Systems having antifreeze not recommended must be completely flushed to insure no old antifreeze remains. In older systems obviously discolored, murky or dirty water; or pH reading outside acceptable range (between

7.0and 8.0) are indications the system should be cleaned or treated. Thoroughly flush system with clean water to remove any sediment or contaminants. Sludge and iron oxide deposits can cause rapid breakdown of inhibitors.

Flushing with clean water. If chemical cleaners are used, use only those recommended for use with aluminum boilers. Follow chemical cleaner manufacturer’s instructions completely.

DO NOT mix different manufacturer’s products.

•When boiler installation is for new heating system, install all of radiation units (panels, radiators, baseboard, or tubing) and supply and return mains.

•After all heating system piping and components have been installed, make final connection of system piping to boiler. A hot water boiler installed above radiation level, or as required by the Authority having jurisdiction, must be equipped with low water cut off device.

•Periodic inspection is necessary for flushing of float type devices, per low water cut off manufacturers specific instructions.

Supply And Return Lines

•Boiler is set up to receive 1 ¼” NPT supply and return piping from top access.

•Boiler may be piped from left side by turning supply elbow.

•Install furnished dielectric unions at boiler supply and return lines prior to making system piping connections

•Do Not install copper supply and return piping directly into aluminum boiler section casings due to galvanic corrosion between dissimilar metals.

•Must use provided dielectric unions between copper system piping and boiler to make final connection to boiler.

•Furnished circulator pump can be installed at installer preferred location.

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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 GASBoiler Location Considerations Before Installing the BoilerBoiler Sizing Extreme cold climate areas, use ¾ Armaflex or equivalent Boiler InstallationLocating The Boiler Combustion Air And Vent Pipe RequirementsFoundation Requirements Install boiler on level surfaceBoiler is not to be installed on carpeting Condensate Drain RequirementsSupply And Return Lines Clean the System FirstNear Boiler Piping Single Zone Boiler Piping Two Zone Boiler Piping With Zone Valves Multi-Zone SystemsTwo Zone Boiler Piping With Circulators Page Page Page Terminate pipe with plain end not threaded Safety Relief ValveExpansion Tank And Make-Up Water Diaphragm Type Expansion Tank Piping Conventional Closed Type Expansion Tank Piping Chilled Water Piping Reinstall vent drain lineCondensate Drain Piping Filling Condensate Trap With WaterElbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipe Combustion AIR and Vent PipeConnections And Termination ExampleBoiler 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 ConnectionsLeak Check Gas Piping Connecting The Gas PipingGAS Supply Piping Check Gas Supply365,000 Gas Pipe Sizes625,000 445,000Connect Circulator Pump Wiring Electrical WiringElectric Power Supply Thermostat InstallationWiring Schematic Ladder Wiring Diagram Page Ladder Diagram for Figure Controls and Accessories Circulator Pump Casting Temperature Safety SwitchDrain Valve Draft InducerStart UP To Turn Off Gas To Appliance Operating InstructionsDisplay S9381A Integrated Boiler Control Operation and AdjustmentsUser Parameters Adjusting Settings State Code Definitions Sequence of Operation Check OUT Procedure and Adjustment Review All Instructions Set Thermostat To Desired Room TemperatureVR8205 Maintenance and Cleaning Remove draft inducer and gasket from top of flue connector Annual Examination And Cleaning Of Boiler ComponentsIgniter wires Gas valve wires Initial Service Checks TroubleshootingError Codes Boiler Differential Pressure Differential AIR Pressure Switch CheckAluminum Series Eliminate System Leaks Clean System FirstFill Water and Chemistry 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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