Filters

All 180DFE filters are installed external to the unit. Filters should be inspected monthly. Clean or replace the filters when necessary to ensure proper furnace operation. Re- placement filters must be rated for high velocity airflow. Table 1 lists recommended filter size.

A filter must be in place when the unit is operating.

 

TABLE 1

 

 

Cabinet Width

Return Air Filter Size (inches)

 

 

 

 

A (14−1/2")

14 x 25 x 1 (1)

B (17−1/2")

16 x 25 x 1 (1)

 

 

C (21")

20 x 25 x 1 (1)

Maintenance

A licensed professional service technician (or equivalent)

should inspect the complete system each season (heating and cooling). The following maintenance procedures should only be conducted by a licensed professional ser- vice technician (or equivalent). Do not attempt to service

the unit in any way.

WARNING

ELECTRICAL SHOCK, FIRE,

OR EXPLOSION HAZARD.

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.

Improper servicing could result in dangerous opera- tion, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace.

When servicing controls, label all wires prior to dis- connecting. Take care to reconnect wires correctly. Verify proper operation after servicing.

Venting System

WARNING

Asphyxiation Hazard

The exhaust vent for this furnace must be leak−free and must be securely connected to the furnace flue collar at all times.

For your safety and to fulfill the terms of the limited warranty, a licensed professional service technician (or equivalent) must annually inspect this furnace and its vent system.

Annually (before heating season) inspect furnace venting system, vent cap, heat exchanger, and burners for corro- sion, deterioration, or deposits of debris. Remove any ob- structions.

Inspect the furnace for obvious signs of deterioration. Inspect the furnace venting system to make sure it is in place, physically sound, and without holes, corrosion, or blockage.

Vent pipe must be clear and free of obstructions and must slope upward away from the furnace.

Inspect the furnace return air duct connection to ensure duct is sealed to the furnace and terminates outside the space containing the furnace.

Inspect the physical support of the furnace to guarantee that it is sound without sagging, cracks or gaps around base and it maintains seal between base and support.

During a seasonal check the service technician will con- duct a combustion analysis. The technician will also in- spect the indoor blower, burner flames, electrical connec- tions and the venting system.

Blower

Check the blower wheel for debris and clean if necessary. The blower motors are prelubricated for extended bearing life. No further lubrication is needed.

WARNING

The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inju- ry or death.

Burner Flame

CAUTION

To ensure proper operation, a licensed professional service technician (or equivalent) should check the burner flame and conduct a combustion analysis annually.

Electrical

1 − Check all wiring for loose connections.

2 − Check for the correct voltage at the furnace (furnace operating).

3 − Check amp−draw on the blower motor with blower ac- cess panel in place.

Motor Nameplate__________Actual__________

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Lennox International Inc ML180DFE SERIES manual Filters, Maintenance
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ML180DFE SERIES specifications

Lennox International Inc. is recognized for its innovative heating and cooling solutions, and the ML180DFE series is no exception. This high-efficiency gas furnace represents a significant leap in residential heating technology, designed to provide optimal home comfort while maximizing energy savings.

At the core of the ML180DFE series is its superior efficiency rating of up to 80% Annual Fuel Utilization Efficiency (AFUE). This ensures that a higher proportion of the fuel consumed is converted into heat for the home, minimizing waste and lowering energy bills. Homeowners can appreciate the tangible financial benefits of this efficiency, especially in areas with colder climates where heating costs can rise dramatically.

One of the standout features of the ML180DFE series is its two-stage heating capability. This technology enables the furnace to operate at two different levels of heat output, allowing it to adjust to the heating demands of the home more effectively. By running at a lower capacity on mild days and boosting to full capacity during extreme cold, the furnace delivers more consistent indoor temperatures and reduces the frequent on-and-off cycling that can wear out the system over time.

The ML180DFE series also utilizes a high-efficiency DC motor. This motor not only improves energy efficiency but also enhances the overall comfort of the home. It operates quietly, ensuring minimal disruption while providing reliable heat.

Safety is always a priority with Lennox products, and the ML180DFE series includes a range of safety features. These include a robust heat exchanger designed to withstand high temperatures and a safety shut-off system that reacts in case of any operational irregularities, offering peace of mind for homeowners.

The unit is also designed for easy installation and serviceability, featuring a durable cabinet and accessible components for routine maintenance. Lennox ensures that customers aren’t just buying a furnace, but a long-term heating solution that will serve them well for years to come.

In conclusion, the Lennox ML180DFE series is an excellent choice for homeowners seeking a reliable, efficient, and safe heating solution. With its two-stage heating, high-efficiency ratings, and advanced technologies, this furnace embodies the company’s commitment to quality and innovation, ensuring comfort and satisfaction in every home.
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