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

3 − Check amp-draw on the blower motor.

Motor Nameplate__________Actual__________

NOTE − Do not secure the electrical conduit directly to the air ducts or structure.

Blower Speeds

NOTE − CFM readings are taken external to unit with a dry evaporator coil and without accessories.

1 − Turn off electrical power to furnace.

2 − Remove blower access panel.

3 − Disconnect existing speed tap at control board speed terminal.

NOTE − Termination of any unused motor leads must be insulated.

4 − Refer to blower speed selection chart on unit wiring dia- gram for desired heating or cooling speed. See blower performance data beginning on Page 48.

5 − Connect selected speed tap at control board speed terminal.

6 − Resecure blower access panel.

7 − Turn on electrical power to furnace. Electronic Ignition

The integrated control has an added feature of an internal Watchguard control. The feature serves as an automatic re- set device for ignition control lockout caused by ignition fail- ure. This type of lockout is usually due to low gas line pres-

sure. After one hour of continuous thermostat demand for heat, the Watchguard will break and remake thermostat de- mand to the furnace and automatically reset the control to begin the ignition sequence.

Exhaust and Air Intake Pipe

1 − Check exhaust and air intake connections for tightness and to make sure there is no blockage.

2 − Are pressure switches closed? Obstructed exhaust pipe will cause unit to shut off at pressure switches. Check termination for blockages.

3 − Reset manual flame rollout switches on burner box cover.

Failure To Operate

If the unit fails to operate, check the following:

1 − Is the thermostat calling for heat?

2 − Are access panels securely in place?

3 − Is the main disconnect switch closed?

4 − Is there a blown fuse?

5 − Is the filter dirty or plugged? Dirty or plugged filters will cause the limit control to shut the unit off.

6 − Is gas turned on at the meter?

7 − Is the manual main shut-off valve open?

8 − Is the internal manual shut-off valve open?

9 − Is the unit ignition system in lock out? If the unit locks out again, inspect the unit for blockages.

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Lennox International Inc G61MP Series Units, Gas Units installation instructions
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G61MP Series Units, Gas Units specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, and its G61MP Series Gas Units stand as a testament to the company's commitment to innovation and energy efficiency. These gas units are specifically designed for residential applications and are recognized for their reliability, performance, and advanced technology.

One of the main features of the G61MP Series is its variable speed motor, which offers significantly enhanced comfort over traditional single-stage gas units. This technology allows for precise temperature control and improved humidity management. By adjusting its speed according to the heating demand, the unit minimizes temperature fluctuations, leading to a more consistent indoor climate.

Another notable characteristic of the G61MP Series is its ECM blower motor, which operates quietly and efficiently. This motor not only reduces energy consumption but also enhances the overall comfort of the home by providing a steady flow of warm air without the disruptive noise often associated with traditional gas units.

The G61MP Series units are designed with a focus on energy efficiency, boasting an impressive Annual Fuel Utilization Efficiency (AFUE) rating. This rating indicates that these units convert a significant portion of the fuel they consume into usable heat, resulting in lower energy bills for homeowners. The units are equipped with a modulating gas valve that further optimizes fuel usage by adjusting the gas flow according to the heating needs of the home.

Safety is a paramount consideration in the design of the G61MP Series. These units are built with advanced safety features, including a self-diagnostic control system that continuously monitors the unit’s performance. This system alerts homeowners to any potential issues, allowing for proactive maintenance and ensuring the longevity of the equipment.

The G61MP Series is also designed for ease of installation and servicing. Its compact design allows for flexible placement in various home environments, while the user-friendly access panels simplify routine maintenance tasks.

In conclusion, Lennox International Inc.'s G61MP Series Gas Units deliver a combination of advanced technology, energy efficiency, and reliability, making them an excellent choice for homeowners looking to enhance their heating systems. With features designed to maximize comfort, minimize energy costs, and ensure safety, these units represent a significant advancement in residential heating solutions.
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