Lennox International Inc G61MP specifications TWO−STAGE Integrated Control Board, 120VAC Line

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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

 

 

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Contents Table of Contents G61MPOptional Accessories − Must be Ordered Extra SpecificationsAfue Direct Vent Blower Data G61MP−36B−045 Performance Less Filter1495 2340 1285 1385 2410 TOP CAP Glass AssemblyG61MP Parts Arrangement Sight Blower−Control Box Control Transformer T1 Door Interlock Switch S51Circuit Breaker CB8 Integrated Control Board A92Page 120VAC Line TWO−STAGE Integrated Control BoardIntegrated Control Board Terminals 120VAC Neutral Integrated Control Board 5 Pin TerminalDS1 DS2 Description −Blower Compartment Blower Motor B3 and Capacitor C4Secondary Limit Controls S21 Supply AIR BlowerBurners Figure −Heating Components Flame SensorIgnitor Ignitor Bracket Burners Front View Burners TOP ViewClamshell Heat Exchanger Flame Rollout Switches S47Combustion Air Inducer Prove Switch S18 Primary Limit Control S10CAI & Cold END Header BOX Assembly Dual Combustion AIR Prove SwitchFirst stage Negative Pressure Second stage Positive Combustion Air Inducer B6 II−PLACEMENT and Installation Outdoor Termination Kits and Corresponding Equivalencies−Vent Piping Guidelines Minimum Vent Pipe Lengths −PVC Joint Cementing ProcedureMaximum Vent Pipe Lengths − Venting Practices Upflow or Downflow Direct or NON-DIRECT Vent ApplicationsTypical Exhaust Pipe Connections Reducer Plug Direct Vent applications where combustion air is takenFrom indoors and flue gases are discharged outdoors ReducerCarbon Monoxide Poisoning Hazard Sweep ELLPage − G61MP Vent Termination − AIR Inlet of Other Appliance Exhaust Pipe Termination Size Reduction Front View Side ViewUsing Existing Chimney ANGLE−CUT in Direction G61MP Direct Vent ApplicationCondensate Piping G61MP NON−DIRECT Vent Application Using Existing ChimneySide View NON−DIRECT Vent Wall Ring Termination Hose clamp Condensate AssemblyVent Nipple TEE Screw Coupling CLEAN−OUT Access −RINGS CAP HI/LO Screws−Preliminary and Seasonal Checks For Your Safety Read Before Operating−Heating Start-Up −Testing Gas Piping −Safety or Emergency ShutdownIV−HEATING System Service Checks A−C.S.A. Certification −Extended Period Shutdown− Proper Gas Flow Approximate −Testing Gas Supply Pressure−Check Manifold Pressure − Proper Combustion− High Altitude − Condensate pH Range−Temperature Rise −Flame Signal−External Static Pressure VI−MAINTENANCE −Blower Speed TapsPage Page VII− Wiring and Sequence of Operation Sequence of Operation On Next Heating Sequence of Operation See BOX a LOW Flame Signal YES Normal Operation DS1 and DS2 Simultaneous Slow Flash YESEN or Heat Demand is SATISFIED. a Five Cooling Sequence of Operation Continuous LOW Speed FAN Sequence of Operation Single VIII− Field Wiring Applications and Jumper SettingsTWO Cool TransformerDoor interlock switch failure − Both diagnostic lights fail to light upLED#2−Off Miswiring of furnace or improper con − Diagnostic lights flash the roll−outLED#1−Slow Flash Miswiring of furnace or improper Uous fan demand Primary, secondary or backup secon− Diagnostic lights flash the limit failure mode Connections at limit switchesCondensate in prove switch line Switch failure code 2.5 minutes afterLED#1−Off Prove switch lines damaged Prove switch does not close due to aWith a heating demand Installed Terminating the unit − Diagnostic lights flash the pressureSwitch code − After 5 tries the control diagnosticsFails to stay lit Operation. Problem is characterized − Roll−out switch trips during− Diagnostic lights flash roll−out fail − Combustion air inducer energizesLED#1−Slow Flash Mode Er motorNostic lights flash low flame sense Burner Sensor rod is contaminatedService Notes

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.
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