TWO−STAGE INTEGRATED CONTROL BOARD

LEDs

DIP

SWITCHES

1 − 4

W915 FACTORY INSTALLED JUMPER

(MUST CLIP FOR 2 STAGE COOL)

THERMOSTAT CONNECTIONS (TB1)

DIP SWITCH(ES)

FUNCTION

1 and 2 Blower Off Delay (Heating Mode)

3Second Stage ON Delay (Single−stage t’stat)

4 Blower Off Delay (Cooling Mode)

FIGURE 4

TABLE 3

Integrated Control Board Terminals

120VAC Neutral

LINE

Line

 

 

XFMR

Transformer

 

 

EAC

Electronic Air Cleaner

 

 

CIRC

Indoor Blower

 

 

HUM

Humidifier

 

 

 

120VAC Line

 

 

HUM

Humidifier

 

 

XMFR

Transformer

 

 

LINE

Line

 

 

PARK

For Unused Leads

 

 

COOL

Cooling Speed

 

 

EAC

Electronic Air Cleaner

 

 

HI HEAT

HIigh Heat Speed

 

 

LO HEAT

Low Heat, Low Cool and Continuous Fan

 

Speed

 

 

TABLE 4

Integrated Control Board 5 Pin Terminal

PIN #

Function

 

 

1

Ignitor

2Combustion Air Inducer High Speed

3Combustion Air Inducer Low Speed

4

Combustion Air Inducer Neutral

 

 

5

Ignitor Neutral

 

 

TABLE 5

Integrated Control Board 12Pin Terminal

PIN #

Function

 

 

1

Gas Valve 2nd Stage (High Fire)

 

 

2

Second Stage Prove Switch

 

 

3

Not Used

 

 

4

Ground

 

 

5

24V Hot

 

 

6

Primary Limit In

 

 

7

Gas Valve 1st stage (Low Fire)

 

 

8

Gas Valve Common

 

 

9

24V Neutral

 

 

10

Ground

 

 

11

Primary Limit Out

 

 

12

1st Stage Prove Switch

 

 

Page 10

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Lennox International Inc G61MP TWO−STAGE Integrated Control Board, Integrated Control Board Terminals 120VAC Neutral

G61MP specifications

Lennox International Inc. has long been a leader in HVAC solutions, and the G61MP gas furnace exemplifies the company's commitment to innovation and energy efficiency. This high-efficiency gas furnace operates with an Annual Fuel Utilization Efficiency (AFUE) of up to 96%, allowing homeowners to save significantly on energy costs while maintaining a comfortable indoor environment.

One of the primary features of the G61MP is its modulating gas valve. This technology enables the furnace to operate at multiple levels of heating output, ensuring that it can adjust its performance according to the home’s heating demands. By modulating the heating output, the G61MP maximizes efficiency and minimizes energy waste, providing a consistent temperature and improved comfort.

The G61MP also incorporates advanced two-stage heating, which enhances its performance by reducing temperature fluctuations in the home. This feature is especially beneficial during transitional weather periods when heating needs may vary widely. With its ability to operate on a lower stage most of the time, the furnace can produce quieter operation and reduced energy consumption.

In terms of design, the G61MP includes a sealed combustion chamber that draws air from outside the home for combustion, enhancing safety and efficiency. This design feature eliminates the need for indoor air, improving indoor air quality. The furnace is also equipped with a high-efficiency ECM blower motor that not only boosts comfort but operates quietly and uses less electricity compared to traditional motors.

Further enhancing its efficiency, the G61MP utilizes a variable-speed blower, which allows for precise control of airflow throughout the home. This results in better humidity control and improved air distribution, providing an overall more comfortable environment.

The Lennox G61MP is compatible with the iComfort S30 smart thermostat, allowing homeowners to control their heating remotely, adjust settings based on their schedules, and access energy usage data. This connectivity transforms the G61MP into an integral part of a smart home ecosystem, facilitating energy conservation and comfort optimization.

Lastly, the G61MP is designed with durability in mind. Its robust construction and high-quality materials ensure reliable performance and lengthy service life. Homeowners can feel assured that they are investing in a heating solution that will meet their needs for many winters to come. In summary, the Lennox G61MP gas furnace stands out with its high efficiency, advanced technology, and user-friendly features, making it a top choice for homeowners seeking exceptional heating performance.