Lennox International Inc Merit Series Gas Furnace guide

HORIZONTAL LEFT POSITION

Vent Pipe	Top Vent Discharge

HORIZONTAL RIGHT POSITION

Top Vent Discharge

Vent Pipe

Pressure Switch

Pressure
Switch
Flue	AIR
Flue
Transition	FLOW
	FLOW
Cover Plate
Make−Up Box	Collector Box

Flue

Transition

AIR

FLOW

Cover Plate

Collector Box

Make−Up Box

DDisconnect pressure switch hose from barbed fitting on the pressure switch assembly. Remove pressure switch assembly (1 screw) and cut wire tie to free pressure switch wires. Re− install pressure switch on the other side of orifice plate and re− connect pressure switch hose.

DRe−secure pressure switch wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and secure to the gas manifold.

FIGURE 19

HORIZONTAL LEFT POSITION

Side Vent Discharge

DGas supply piping must be brought into the unit from the bot- tom in order to accommodate the flue pipe.

DCut combustion air inducer tubing from 9" to 8" to avoid interference with inducer motor

DRemove make−up box assembly (2 screws) and cut wire tie to free make−up box wires. Re−install make−up box on other side of cabinet.

DRe−secure make−up box wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and secure to the gas manifold.

FIGURE 21

Pressure Switch

Vent Pipe

AIR

FLOW

	HORIZONTAL RIGHT POSITION
Make−Up Box	Side Vent Discharge
Make−Up Box
	Pressure Switch
AIR

Make−Up Box	Collector Box

DCut combustion air inducer tubing from 9" to 7" to avoid interference with inducer motor

DRe−secure pressure switch wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and secure to the gas manifold.

FIGURE 20

FLOW

Flue Transition

Collector Box

FIGURE 22

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Merit Series Gas Furnace specifications

Lennox International Inc. is a leading name in the heating and cooling industry, and their Merit Series Gas Furnace embodies the commitment to quality and efficiency that the company is known for. The Merit Series is designed to provide reliable heating in a sustainable manner, making it an excellent choice for homeowners seeking comfort without excessive energy bills.

One of the standout features of the Merit Series Gas Furnace is its efficiency ratings. The units in this series typically boast Annual Fuel Utilization Efficiency (AFUE) ratings of up to 95%. This level of efficiency means that the furnace converts a significant portion of the fuel it uses into heat, ultimately lowering operating costs. Such energy-efficient performance is not only beneficial for the wallet but also promotes environmental sustainability.

The Merit Series also incorporates advanced technologies that enhance its operation. The inclusion of a multi-speed blower motor is a notable feature that provides thoughtful airflow management throughout the home. By adjusting the speed according to the heating needs, the furnace optimizes comfort levels while minimizing noise and energy consumption. Homeowners can enjoy a warm environment without the disruptive sounds often associated with traditional furnaces.

Moreover, the Merit Series comes equipped with durable construction materials designed to withstand the test of time. From the robust heat exchanger to the heavy-gauge cabinet, Lennox focuses on longevity and reliability. This ensures that homeowners can trust their furnace to operate effectively even in the harshest winter conditions.

Safety features are also integral to the design of the Merit Series Gas Furnace. With an integrated Flame Sensor and a built-in safety shut-off system, the furnace ensures that any irregularities in operation are promptly detected and addressed. Such measures provide peace of mind for families using the heating system throughout the cold months.

Installation and maintenance are further simplified with the Merit Series. Its design facilitates easier access for HVAC professionals, allowing for quicker installations and routine service, ensuring that homeowners spend less time and money on upkeep.

In conclusion, Lennox International Inc.'s Merit Series Gas Furnace combines efficiency, advanced technology, and robust construction, making it a top choice for families looking to enhance their home's heating system. With its energy-saving innovations and commitment to reliability, the Merit Series stands as an exemplary option in today’s market.