4 - White Rodgers 36E/36F Gas Valve - Switch gas valve lever to OFF.

Honeywell VR8205 Gas Valve - Turn knob on gas

valve clockwise to OFF. Do not force.

5 - Replace the upper access panel.

Filters

All G50UHi 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 sizes.

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

TABLE 1

Furnace

Filter Size

Cabinet Size

Side Return

Bottom Return

 

 

 

 

17-1/2"

16 X 25 X 1 (1)

16 X 25 X 1 (1)

 

 

 

21"

16 X 25 X 1 (1)

20 X 25 X 1 (1)

 

 

 

24-1/2"

16 X 25 X 1 (2)

24 X 25 X 1 (1)

Maintenance

A qualified service technician should inspect the complete

system each season (heating and cooling). The following maintenance procedures should only be conducted by a qualified service technician. 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 securely connected to the furnace flue collar at all times.

For your safety and to fulfill the terms of the limited warranty, a qualified service technician must annual+ ly 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.

Inspect and clean the condensate trap and drain.

During a seasonal check the service technician will inspect the indoor blower, burner flames and electrical connections along with 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 qualified technician should annually check the burner flame.

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.

Motor Nameplate__________Actual__________

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Lennox International Inc G50UHi manual Filters, Maintenance
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G50UHi specifications

Lennox International Inc. has long been recognized as a leader in the heating, ventilation, and air conditioning (HVAC) industry, consistently pushing the boundaries of efficiency and comfort. One of their standout products is the G50UHi, an advanced gas furnace that showcases a blend of cutting-edge technology and innovative design aimed at enhancing indoor comfort while minimizing energy costs.

The G50UHi is designed with high-efficiency performance in mind, boasting an impressive Annual Fuel Utilization Efficiency (AFUE) rating. This means that the furnace converts a significant portion of the fuel it consumes into usable heat, ensuring that homes stay warm during colder months without excessive energy expenditure. With this feature, homeowners can experience reduced utility bills while contributing to a more sustainable environment.

One of the key technologies integrated into the G50UHi is the modulating gas valve. This system allows the furnace to adjust its heating output in small increments according to the specific needs of the home. This not only provides optimal comfort by maintaining consistent temperatures but also enhances energy savings as the furnace operates at lower capacities during milder weather.

Another notable characteristic of the G50UHi is its quiet operation. Engineered to minimize noise, this furnace is equipped with insulated cabinets and advanced fan technology, making it one of the quieter models on the market. This focus on sound reduction means that homeowners can enjoy a comfortable environment without disruptive background noise from their heating system.

Durability and reliability are also hallmarks of the G50UHi, featuring high-quality components that are built to last. The unit’s heat exchanger is crafted from robust materials, ensuring long-term performance and reduced risk of breakdowns. Additionally, Lennox provides a comprehensive warranty on the G50UHi, giving homeowners peace of mind regarding their investment.

The G50UHi is compatible with innovative smart thermostat technology, allowing for seamless integration with modern home automation systems. This compatibility not only enhances user control and convenience but also maximizes energy efficiency through optimized heating schedules.

In summary, the Lennox International Inc. G50UHi gas furnace represents a pinnacle of HVAC technology. Its high efficiency, modulating gas valve, quiet operation, durability, and smart technology integration make it an ideal choice for homeowners looking to improve comfort while controlling energy costs. With the G50UHi, Lennox continues to uphold its reputation as a trusted leader in the HVAC industry.
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