Start−Up & Operation Information

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 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.

WARNING

If you do not follow these instructions exactly, a fire 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 G71MPP is equipped with a gas con- trol switch. Use only your hand to move the control switch. Never use tools. If the switch will not move by hand, do not try to repair it. Call a licensed professional service techni- cian (or equivalent). Force or attempted repair may result in a fire or explosion.

Placing the G71MPP furnace into operation: G71MPP units are equipped with a SureLight® ignition sys- tem. Do not attempt to manually light burners on this fur- nace. 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 SureLight® ignition system.

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 the gas valve switch to the OFF position. See fig- ure 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.

VARIABLE CAPACITY GAS VALVE

GAS VALVE

SWITCH

GAS VALVE SHOWN IN OFF POSITION

FIGURE 2

8 − Move gas valve switch to ON position. See 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 Off Gas to the Unit" and call your service tech-

nician or gas supplier. 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 the gas valve switch to the OFF position. 5 − Replace the upper access panel.

Filters

All G71MPP 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 and when the unit is operating. The filter access panel must also be in place and properly se- cured during unit operation.

TABLE 1

Furnace	Filter Size
Cabinet Width	Side Return	Bottom Return
	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)

Page 4

G71MPP specifications

Lennox International Inc. has long been recognized as a leader in the HVAC industry, and one of its notable offerings is the G71MPP gas furnace. This high-efficiency unit reflects the company’s commitment to innovation, performance, and sustainability. The G71MPP is designed to provide exceptional comfort with a focus on energy efficiency and advanced technology.

One of the main features of the G71MPP is its impressive Annual Fuel Utilization Efficiency (AFUE) rating, reaching up to 97%. This means that a significant percentage of the energy consumed is converted into heat, leading to lower utility bills and reduced environmental impact. With such high efficiency, homeowners can enjoy warmth without the guilt of excessive energy consumption.

The G71MPP features a modulating gas valve, which allows for precise temperature control. This technology enables the furnace to adjust its heating output to match the specific needs of the home at any given time. As a result, it provides a consistent, comfortable indoor environment while minimizing energy usage. The unit also showcases a variable-speed blower motor, which improves airflow efficiency and enhances indoor air quality by reducing the circulation of dust and allergens.

For even greater control and convenience, Lennox integrates its Smart Thermostat technology with the G71MPP. This feature allows users to program their heating schedules via a smartphone app, ensuring that their home is always at the ideal temperature when they arrive. Additionally, the unit is compatible with home automation systems, making it easier than ever to manage home comfort.

Durability is a hallmark of the G71MPP, as it is constructed with high-quality materials built to withstand the rigors of time and use. The unit features a rugged stainless steel heat exchanger that not only enhances the performance but also extends the lifespan of the furnace. Furthermore, its quiet operation is a significant benefit, ensuring that homeowners can enjoy a cozy environment without the disruptive noise often associated with traditional furnaces.

In conclusion, Lennox International Inc.’s G71MPP gas furnace stands out as a reliable, efficient, and technologically advanced heating solution. With its high AFUE rating, modulating gas valve, variable-speed blower motor, and connectivity features, it embodies the future of home heating. As energy costs continue to rise, the G71MPP offers an effective solution for homeowners seeking comfort, efficiency, and smart technology in their heating systems.