and maintained. However, the unit’s performance can be greatly impacted by the individual installation and the op- erating environment. It is your responsibility to ensure that this appliance is maintained. Proper maintenance is criti- cal for your safety and the satisfactory operation of the product. Lennox strongly recommends annual in- spection and maintenance of this appliance. Contact your Lennox dealer for an inspection by a licensed profes- sional service technician (or equivalent).

DANGER

Danger of explosion.

There are circumstances in which odorant used with LP/propane gas can lose its scent. In case of a leak, LP/propane gas will settle close to the floor and may

Operating the Gas Valve (Figure 2)

1 − STOP! Read the safety information at the beginning of this section.

2 − Set the thermostat to the lowest setting.

3 − Turn off all electrical power to the unit.

4 − This furnace is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.

5 − Remove the upper access panel.

6 − Move switch on gas valve to OFF. See figure 2.

7 − Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instruc- tions. If you do not smell gas go to next step.

8 − Move switch on gas valve to ON. See figure 2.

be difficult to smell. An LP/propane leak detector should be installed in all LP applications.

Do not attempt to bleed the gas lines of air. Call your local gas provider.

Start−Up & Operation Information

WARNING

If you do not follow these instructions exactly, a fire

MANIFOLD

PRESSURE

ADJUSTMENT

SCREW

INLET

 

PRESSURE

 

PORT

GAS VALVE SHOWN IN ON POSITION

 

MANIFOLD PRESSURE OUTLET PORT

or explosion may result causing property damage, personal injury or death.

BEFORE PLACING THE UNIT INTO OPERATION, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

The gas valve on the ML180UH will be equipped with a gas control switch. Use only your hand to move the switch. Never use tools. If the switch will not move by hand, do not try to repair it. Call a licensed professional service technician (or equivalent). Force or attempted re- pair may result in a fire or explosion.

Placing the ML180UH furnace into operation: ML180UH units are equipped with an ignition system. Do not attempt to manually light burners on this furnace. Each time the thermostat calls for heat, the burners will automatically light. The ignitor does not get hot when there is no call for heat on units with this ignition system.

FIGURE 2

9 − Replace the upper access panel.

10 − Turn on all electrical power to to the unit.

11 − Set the thermostat to desired setting.

NOTE − When unit is initially started, steps 1 through 11 may need to be repeated to purge air from gas line.

12 − If the appliance will not operate, follow the section urning Off Gas to the Unit" and call your licensed professional service technician (or equivalent).

Turning Off Gas to the Unit

1 − Set the thermostat to the lowest setting.

2 − Turn off all electrical power to the unit if service is to be performed.

3 − Remove the upper access panel.

4 − Move switch on gas valve OFF.

5 − Replace the upper access panel.

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Lennox International Inc ML180UH Start−Up & Operation Information, If you do not follow these instructions exactly, a fire

LENOX GAS FURNACE, ML180UH specifications

Lennox International Inc. is a name synonymous with quality and innovation in the heating, cooling, and ventilation industry. Among their impressive lineup is the ML180UH gas furnace, a model that exemplifies efficiency, reliability, and advanced technology. Whether you're upgrading an existing heating system or investing in a new one, the ML180UH is a solid option.

One of the main features of the ML180UH is its exceptional energy efficiency. With an Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%, this furnace converts a significant portion of the fuel it consumes into usable heat. This high-efficiency rating not only keeps your home warm but also helps reduce energy consumption and utility bills, making it an environmentally friendly choice.

The ML180UH incorporates a durable, multi-speed blower that plays a crucial role in enhancing comfort. This blower adjusts airflow according to the heating requirements of your home, ensuring consistent and uniform heat distribution. The result is a more comfortable living space with fewer temperature fluctuations.

One standout technology featured in the ML180UH is its design that allows for quiet operation. Lennox has engineered this furnace to minimize noise, thanks to sound-dampening materials and advanced engineering. Homeowners can enjoy a warm home without the disruptive sounds often associated with traditional heating systems.

Another characteristic that sets the ML180UH apart is its commitment to reliability. Built with high-quality materials and rigorous testing standards, this furnace is designed to withstand the rigors of daily use. Additionally, it includes a limited warranty, providing peace of mind and assurance of performance.

The ML180UH is also compatible with a wide range of Lennox accessories and technologies, including humidity control and smart thermostats. These add-ons can enhance your comfort and integrate seamlessly into your home’s existing systems.

In conclusion, the Lennox ML180UH gas furnace stands out for its energy efficiency, advanced features, and reliable operation. By choosing this model, homeowners can enjoy a warm, comfortable living space while benefiting from reduced energy costs. With its focus on quality and performance, Lennox continues to be a leader in the heating industry, making the ML180UH a compelling choice for anyone in need of a new furnace.