Lennox International Inc Gas-Fired Hot Water Boiler Set Thermostat To Desired Room Temperature

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CHECK OUT PROCEDURE AND ADJUSTMENT

F.After adjusting input rate, turn boiler off, remove manometer or pressure gauge, reinstall ⅛” plug on gas valve. Turn boiler on.

G.Boiler should typically operate between:

•8.5% -10.0% CO2 on Natural Gas

•9.5% -11.0% CO2 on Propane Gas

Under all conditions CO level should not exceed 100 ppm.

9.Restore all gas appliances that may have been shut off (while measuring boiler input rate) to normal operating conditions.

I.Remove regulator cover screw on top of gas valve, and insert an appropriate screwdriver into adjustment screw.

II.Turn adjustment screw clockwise to increase input rate, or counter clockwise to decrease input rate.

III.Replace cover screw, or cover hole temporarily with your finger to check new manifold pressure setting. Do not set manifold pressure lower than 2.0 inches w.c. or higher than 3.0 inches w.c. when adjusting input rate.

IV.Measure new input rate (cover screw must be installed). Repeat steps I.-IV until the input rate is within +/-2% of the nameplate input rating.

V.If the actual input rate can not be set to within 2% of the correct input rating by adjusting manifold pressure, a change in gas orifice size is required. Consult the boiler manufacturer for information on correct orifice sizing. The specific gravity (G) and the higher heating value (HHV) of the local natural gas must be obtained from the local gas utility in order to determine the proper orifice size.

Set Thermostat To Desired Room Temperature

Observe several operating cycles to verify proper operation.

Review All Instructions

Review all instructions shipped with this boiler with owner or maintenance person. Instructions must be affixed on or adjacent to the boiler.

Complete and sign the “Installation and Check-Out Certificate” on page 54.

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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 Sizing Before Installing the BoilerBoiler Location Considerations 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 RequirementsNear Boiler Piping Clean the System FirstSupply 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 Expansion Tank And Make-Up Water Safety Relief ValveTerminate pipe with plain end not threaded 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 InstructionsUser Parameters Adjusting Settings S9381A Integrated Boiler Control Operation and AdjustmentsDisplay State Code Definitions Sequence of Operation Check OUT Procedure and Adjustment Review All Instructions Set Thermostat To Desired Room TemperatureVR8205 Maintenance and Cleaning Igniter wires Gas valve wires Annual Examination And Cleaning Of Boiler ComponentsRemove draft inducer and gasket from top of flue connector Initial Service Checks TroubleshootingError Codes Boiler Differential Pressure Differential AIR Pressure Switch CheckAluminum Series Fill Water and Chemistry Clean System FirstEliminate 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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