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Lennox International Inc GWB9-050IH-2 Annual Examination And Cleaning Of Boiler Components

Models: GWB9-050IH-2 GWB9-100IH-2 GWB9-075IH-2 Gas-Fired Hot Water Boiler

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MAINTENANCE AND CLEANING

Annual Examination And Cleaning Of Boiler Components

!DANGER

Before servicing, turn off electrical power to boiler at service switch. Close manual gas valve to turn gas supply OFF to boiler. Failure to comply will result in death or serious injury.

NOTICE

Have qualified service agency perform the following service procedures. Boiler owner should not attempt these procedures.

1.Before Servicing, turn off electrical power to boiler at service switch. Close manual gas valve to turn off gas supply to boiler.

2.Cleaning Flue passages between boiler sections.

A.Any buildup of sediment or aluminum oxide (white powdery or flaky substance) in flue passages must be cleaned as follows.

B.Remove jacket front and top panels. Disconnect condensate drain line from barbed fitting on bottom of boiler. Keep open end of drain line above water level in condensate trap to prevent trap from draining. Disconnect pressure switch hose from barbed fitting on gas valve. Disconnect 1½ x 2” flexible coupling from air inlet. Disconnect air by- pass (½” transparent vinyl tube) from bottom of mixer.

C.Remove air baffle from ½” x 2” flexible coupling and clean air baffle if necessary. Refer to repair parts diagram, mixer and pressure switch assembly.

D.Confirm manual gas valve is closed and disconnect gas line to gas valve at union. Disconnect wires to gas valve and igniter.

E.Loosen but do not remove five (5) nuts attaching mixer assembly to boiler. Remove two (2) igniter screws and remove igniter.

F.Remove five (5) nuts and remove mixer assembly. Remove burner and mixer gasket.

G.Aluminum oxide deposits are water soluble and may be rinsed away with spraying or running water. Before rinsing, connect a ½” I.D. hose to barbed fitting on bottom of boiler and run hose to bucket or drain.

H.After rinsing, remove any remaining loosened sediment using shop vacuum with snorkel attachment.

I.Inspect burner for any foreign matter in flame ports or inside burner. Any foreign matter should be removed by blowing with compressed air or vacuuming.

J.Inspect interior of mixer for any signs of sediment or aluminum oxide and clean if necessary.

K.Reinstall burner and mixer gasket and position mixer assembly over studs. Install five (5) nuts but do not tighten. Reinstall igniter and igniter gasket and fasten with two (2) screws. Use care when installing the igniter. Tighten five (5) nuts holding mixer assembly.

L.Connect:

•Gas line to gas valve

•Condensate drain line to boiler

•Pressure switch hose to gas valve

•Air by-pass to mixer

•1 ½” x 2” flexible coupling to air inlet and make sure to put air baffle back to correct position

•Igniter wires

•Gas valve wires

3.Visually inspect condensate lines leading from boiler sections and vent pipe connector to condensate trap. Refer to repair parts diagrams. Any foreign material or debris visible in condensate lines needs to be cleaned out as follows:

A.Disconnect condensate drain lines from condensate trap.

B.Remove condensate trap and drain all water from trap.

C.Disconnect condensate lines from fitting on bottom of boiler and vent pipe connector.

D.Run cold water through condensate lines and trap to thoroughly flush out any sediment or debris.

E.Reinstall condensate trap and condensate lines.

F.Follow instructions under “Near Boiler Piping” for filling condensate trap with water.

4.Inspection of flue connector requires following steps. Refer to repair parts diagram.

A.Loosen the clamp on the draft inducer end of the 2” vent pipe connector that connects the vent to the draft inducer. Disconnect (unplug) wiring harness from draft inducer motor and draft inducer temperature safety switch. Remove four (4) bolts that attach draft inducer to flue connector.

B.Remove draft inducer and gasket from top of flue connector.

C.Inspect interior of flue connector. Any buildup of sediment or aluminum oxide on inside surface must be cleaned. Position draft inducer gasket and draft inducer and fasten with four (4) screws. Be sure to connect ground wire from draft inducer motor to one of four mounting screws.

D.Connect wiring harness leads to draft inducer motor and draft inducer temperature safety switch.

E.Connect vent pipe connector to draft inducer outlet.

NOTICE

Verify proper operation after servicing.

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Lennox International Inc GWB9-050IH-2 Annual Examination And Cleaning Of Boiler Components, Igniter wires Gas valve wires
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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.