Lennox International Inc G61MP specifications Typical Exhaust Pipe Connections

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TYPICAL EXHAUST PIPE CONNECTIONS

HORIZONTAL DIRECT OR NON-DIRECT VENT

APPLICATIONS

(Horizontal Right-Hand Air

Discharge Application Shown)

CAUTION

Do not discharge exhaust into an existing stack or stack that also serves another gas appliance. If verti- cal discharge through an existing unused stack is re- quired, insert PVC pipe inside the stack until the end

*Limit pipe length to 2" in G61MPV−110 and −135 applications.

DO NOT transition from smaller to larger pipe size in horizontal runs.

2−1/2",

 

 

 

 

 

G61MP−36B−045

3", OR

 

 

 

 

 

G61MP−36B−070

4"

 

 

 

 

 

G61MP−48C−090

 

 

 

 

 

 

G61MP−60C−090

 

 

 

 

 

 

G61MP−48C−110*

REDUCER

 

 

 

 

 

G61MP−60C−110*

 

 

 

 

 

 

 

 

 

 

G61MP−60C−135*

2"*

 

 

 

 

 

 

 

2"

 

2"

 

 

 

G61MP−36B−045

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G61MP−36B−070

2"

 

 

 

 

 

G61MP−48C−090

 

 

 

 

 

 

G61MP−60C−090

is even with the top or outlet end of the metal stack.

CAUTION

The exhaust vent pipe operates under positive pres- sure and must be completely sealed to prevent leak- age of combustion products into the living space.

Intake Piping

The G61MP furnace may be installed in either direct vent or non−direct vent applications. In non−direct vent applica- tions, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be consid- ered and guidelines listed in Combustion, Dilution and Ven- tilation Air section must be followed.

The G61MP unit is designed for either left−side or right−side air intake connections in either upflow or downflow applica- tions. In horizontal applications, air intake must be brought in through the top. Intake air piping is independent of ex- haust piping.

FIGURE 14

IMPORTANT

Exhaust piping and condensate trap must be installed on the same side of the unit.

2.All horizontal runs of exhaust pipe must slope back to- ward unit. A minimum of 1/4" (6mm) drop for each 12" (305mm) of horizontal run is mandatory for drainage. Horizontal runs of exhaust piping must be supported ev- ery 5 feet (1.52m) using hangers.

NOTE − Exhaust piping should be checked carefully to make sure there are no sags or low spots.

3.On the opposite side of the cabinet, glue the provided 2" vent plug into the unused flue collar.

4.Route piping to outside of structure. Continue with installation following instructions given in piping ter- mination section.

Follow the next four steps when installing the unit in direct vent applications, where combustion air is taken from out- doors and flue gases are discharged outdoors. The pro- vided air intake screen must not be used in direct vent ap- plications.

1 − Cement intake piping in slip connector located on the side of the burner box.

2 − Use a #7 sheet metal screw to secure the intake pipe to the connector, if desired. A pilot indentation is provided in the slip connector to assist in locating and starting the fas- tener.

3 − Glue the provided 2" plug into the unused air intake con- nector on the opposite side of the cabinet.

4 − Route piping to outside of structure. Continue with instal- lation following instructions given in general guide lines for piping terminations and in intake and exhaust piping ter- minations for direct vent sections. Refer to figure 15 for pipe sizes.

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Contents Table of Contents G61MPAfue SpecificationsOptional Accessories − Must be Ordered Extra Direct Vent Blower Data G61MP−36B−045 Performance Less Filter1495 2340 1285 1385 2410 Glass Assembly G61MP Parts ArrangementTOP CAP Sight BlowerDoor Interlock Switch S51 Circuit Breaker CB8−Control Box Control Transformer T1 Integrated Control Board A92Page TWO−STAGE Integrated Control Board Integrated Control Board Terminals 120VAC Neutral120VAC Line Integrated Control Board 5 Pin Terminal−Blower Compartment Blower Motor B3 and Capacitor C4 Secondary Limit Controls S21DS1 DS2 Description Supply AIR Blower−Heating Components Flame Sensor IgnitorBurners Figure Ignitor Bracket Burners Front View Burners TOP ViewFlame Rollout Switches S47 Combustion Air Inducer Prove Switch S18Clamshell Heat Exchanger Primary Limit Control S10First stage Negative Pressure Second stage Positive Dual Combustion AIR Prove SwitchCAI & Cold END Header BOX Assembly Combustion Air Inducer B6 II−PLACEMENT and Installation Outdoor Termination Kits and Corresponding Equivalencies−Vent Piping Guidelines Maximum Vent Pipe Lengths −PVC Joint Cementing ProcedureMinimum Vent Pipe Lengths − Venting Practices Upflow or Downflow Direct or NON-DIRECT Vent ApplicationsTypical Exhaust Pipe Connections Direct Vent applications where combustion air is taken From indoors and flue gases are discharged outdoorsReducer Plug 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 ApplicationSide View NON−DIRECT Vent Wall Ring Termination G61MP NON−DIRECT Vent Application Using Existing ChimneyCondensate Piping Condensate Assembly Vent Nipple TEE Screw Coupling CLEAN−OUT AccessHose clamp −RINGS CAP HI/LO Screws−Heating Start-Up For Your Safety Read Before Operating−Preliminary and Seasonal Checks −Safety or Emergency Shutdown IV−HEATING System Service Checks A−C.S.A. Certification−Testing Gas Piping −Extended Period Shutdown−Testing Gas Supply Pressure −Check Manifold Pressure− Proper Gas Flow Approximate − Proper Combustion− High Altitude − Condensate pH Range−External Static Pressure −Flame Signal−Temperature Rise 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 TWO VIII− Field Wiring Applications and Jumper SettingsSingle Cool Transformer− Both diagnostic lights fail to light up LED#2−Off Miswiring of furnace or improper conDoor interlock switch failure − Diagnostic lights flash the roll−outUous fan demand Primary, secondary or backup secon − Diagnostic lights flash the limit failure modeLED#1−Slow Flash Miswiring of furnace or improper Connections at limit switchesSwitch failure code 2.5 minutes after LED#1−Off Prove switch lines damagedCondensate in prove switch line Prove switch does not close due to aTerminating the unit − Diagnostic lights flash the pressure Switch codeWith a heating demand Installed − After 5 tries the control diagnostics− Roll−out switch trips during − Diagnostic lights flash roll−out failFails to stay lit Operation. Problem is characterized − Combustion air inducer energizesMode Er motor Nostic lights flash low flame sense BurnerLED#1−Slow Flash 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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