Sears 9MPD100J14B1, N9MP2050B12B1, N9MP2080F16B1, N9MP2075B12B1, N9MP2100F14B1, 9MPD100J20B1 Leveling

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Installation Positions

This furnace can be installed in an upflow, horizontal (either left or right) or downflow airflow position. DO NOT install this furnace on its back. For the upflow position, the return air ductwork can be at- tached to either the left or right side panel and/or the bottom. For

horizontal and downflow positions, the return air ductwork must be attached to the bottom. The return air ductwork must never be at-

tached to the back of the furnace.

Furnace Installation Considerations

The installation of the furnace for a given application will dictate the position of the furnace, the airflow, ductwork connections, vent and

combustion air piping. Consideration must be given to the follow- ing:

Condensate Trap and Drain Lines

The supplied condensate trap must be attached to the furnace side panel on either the left or right side. For horizontal installa- tions, the drain trap is vertically attached to the side panel below the furnace. A minimum clearance of 6" below the furnace is re-

quired for the condensate trap. Downward slope of the conden- sate drain line from the condensate trap to the drain location must be provided. Adequate freeze protection of the drain trap and the

Horizontal Furnace Installation

This furnace can be installed horizontally in an attic, basement, crawl space, alcove, or suspended from a ceiling in a basement or utility room. See Figure 4. Do not install furnace on its back or in the reverse airflow positions as safety control operation will be ad- versely affected.

Typical Horizontal Installation

Inlet Pipe (not used on Single Pipe model)

Vent

Condensate

Trap

drain line must be provided. See "Condensate Drain Trap"section for further details.

Leveling

Proper leveling of the furnace must be provided to insure proper

drainage of the condensate from the furnace. The furnace must be level to within 114"from front to back and from side to side for upflow

and downflow installations or top to bottom for horizontal installa- tions.

Vent and Combustion Air Connections

On the Dual Certified furnace, the vent and combustion air pipes attach to the furnace through the top panel for the upflow and hori-

zontal installations. For the downflow installation, the vent and

combustion air pipes attach to the furnace through the alternate locations on the furnace side panels.

Note: On the Direct Vent furnace, the vent pipe attaches to the fur- nace through the side panels. The combustion air pipe attaches to the top panel or to the alternate location on the side panel.

On the Single Pipe furnace, the vent pipe attaches to the furnace through the furnace side panels.

Note: Repositioning of the combustion blower is required for the vent pipe connection to the furnace through the "right side" panel.

See "Vent and Combustion Air Piping"section for further details.

If the furnace is to be suspended from the floor joists in a crawl space or the rafters in an attic, it is necessary to use steel pipe straps or an angle iron frame to rigidly attach the furnace to prevent movement. These straps should be attached to the furnace with sheet metal screws and to the rafters or joists with bolts. The pre- ferred method is to use an angle iron frame bolted to the rafters or joists. (Take caution to allowdoor panels to be removed for mainte- nance)

If the furnace is to be installed in a crawl space, consult local

codes. A suitable concrete pad or blocks are recommended for crawl space installation on the ground.

NOTE: 6" bottom clearance required for condensate trap.

Thirty (30) inches between the front of the furnace and adjacent

construction or other appliances MUST be maintained for service clearance.

Keep all insulating materials clear from Iouvered door. Insulating materials may be combustible.

The horizontal furnaces may be installed directly on combustible wood flooring or supports as long as all required furnace clear- ances are met. See Figure 4.

 

 

This furnace MUST NOT be installed directly on carpeting or tile or

 

 

other combustible material other than wood flooring or supports.

 

25-23-34

For horizontal installation over a finished living space. A field fabri-

 

cated auxiliary drain pan with drain pipe is required to prevent

 

 

NOTE:6" bottom clearancerequiredfor condensatetrap.

 

damage by overflow due to blocked condensate

drain.

44001 102004

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Contents SingleStage Table of ContentsYES KeepThis page for future reference YES NOESafety Rules FrozenWater Pipe Hazard InstallationLocation and Clearances Typical Upflow Installation Installation RequirementsTypical Downflow Installation Dimensions & Clearances Leveling Combustion Ventilation Air Air Openings and Connecting DuctsRequirements Ventilation Air Venting and Combustion Air CheckExample Unusually Tight ConstructionDirect Vent N9MP2 Models For Two Pipe InstallationVent and Combustion Air Piping Single Pipe N9MP1 ModelsVent and Combustion Air Piping Guidelines TocompensateforoxygenburnedSee.Confined Space InstallaPiping Insulation Guidelines Contaminated Combustion AirCarbon Monoxide POISONING, Fire and Explosion Hazard Sizing Combustion Air and Vent PipeN9MP1 & *9MPD Models Vent Termination ClearancesClearance Description 440O110200415cmforappliances10,OOOBTUH3kW,12 Condensate Drain Trap Freeze Protection CondensateDrain TrapUpflow Installations Top Vent See Figure Upflow Installations Top VentSide View UpflowInstallationsVentthru LeftSideUpflow Installations Vent thru Left Side See Figure SwitchAll Models Vent thru Right Side See Figure All ModelsVentthru RightSideOnly Downflow Left Side Vent and Trap SeeFigure Inlet 4=Coupling & Clamps 112ID Drain Hose On Some Downflow Right Side Vent and TrapDownflow Right Side Vent and Trap See Figure PVC 3/4Horizontal Left-Thru Top See Horizontal Left Thru TopHorizontal Left-Side Vent Horizontal Left-Side Vent See FigureRelief Tube Extension Horizontal Right thru TopYellowor black 16ID Rubber Tube\\Horizontal Right Side Vent SeeFigure HorizontalRight-SideVentTee Trap Connecting Tee Trap to Condensate Trap and Main Drain LineConnecting Vent and Combustion Air Piping Open TeeFire Hazard Connecting Vent Pipes and TerminationProper Sealing Procedure for Combustion Vent Pipe ConnectionVent Termination Shielding Using Exterior RisersHorizontal Termination Vertical TerminationCmbustincncentricRoof -AirTerminationventand Multi Vent Termination ClearancesConcentric Vent and Combustion Air Sidewall Termination Sidewall Inlet Vent and Exhaust Air TerminationIAIternate Input Ratings, USA only Manifold Gas Pressure AdjustmentSupply Pressure Gas Supply PressureTai NaturalPressure For the 50,000, 75,000, 100,000 and 125,000 Btuh ModelsChanging Orifices High Altitude Air Pressure SwitchGeneral Derating Rules Electrical SHOCK, Fire or Explosion HazardValve Gas Piping RequirementsManual shut- off Low PressureHumidifier/Electronic Air Cleaner Electrical WiringInstallations Power SupplyWiringMountedto eithertheleftorright Fan Delay DIP Switch SettingsFan Timer Connections Reduced Furnacelife HazardInsulation InstallationDuctwork and Filter SizingDownflow applications, unless installing on non Filter Installation using Optional Filter RackDownflow Furnace Installation Combustible Floor InstallationFloorDimensions SubbasesforCombustibleFloorsDimensionsFurnace Subbase Startup Checks and AdjustmentsAdjust Pilot Burner Gas SupplyPressureReduced Furnace Life Hazard Temperature Rise CheckHeating and Continuous BlowerSpeed Same Changing Blower SpeedFIRE, EXPLOSION, or Carbon Monoxide Hazards Furnace MaintenanceHeating W Request Circulating Fan G RequestHeating Request with Gas Supply Line Shut Off Than Gas Valve Diagnostic Codes See FigureTypical Gas Valve Honeywell OFFHoneywell SV9541M Smart Valve Sequence of Operation Indicates Honeywell SV9541M Smart Valve Trouble shootingFlashes Flashes + I Flash LEDLED INDICATESCHECK/REPAIR Concentric TerminationVent Termination Clearances Concentric Vent Termination Kit #TicalterminationispreferredFieldsuppliedpipeandfittingsare RequiredtocompletetheinstallationRoof Overhang Rain Cap to Vent Pipe AssemblyConcentric Vent and Combustion Air Side Termination Table for N9MP2 Models 50,000 & 80,000 Btuh FurnacesAir Elbow Concentric Vent Sidewall Attachment25-22-02 25-23-30 N9MP2075B12B1 N9MP2080F16B1N9MP2100F14B1 N9MP2100J20B1 N9MP2125J20B1 Denotes BrandSpecifications N9MP1 Model SpecificationsGeneral Gas & Ignition Specifications N9MP2BlowerData Specifications 9MPDFor 080 Models 4 Ton 19 & 22314 Units For 050 Models 3 Ton UnitsFor 075 Models 3 Ton Units For 100 Models Ton 19 & 22314 UnitsUI I BKw IlttlNeutral t Data25-23-95 100J 125J Key Description PartFunctional 125J12B 16B 14B Non-Functional1GB 14B 20B16B 14B 20B 12B No. Non-FunctionalNAHF002LP Key DescriptionN9MP1 N9MP2 Osob Part not IllustratedCapacitor,7.SMfd.,370V 9MPDNumber 080F12B 075F12B 080J16B 100J14B 100J20B 128L20B125L20B Parts *gMPDKeyDescription No.Non- Functional Number 050F12B 078F12B 080J16B 100J14B 100J2OB080J16B Part GMPDNon- Functional Number 050F12B 075F12BIOOJ20B 1013816 + Order from Service Parts 44001Non- Functional Number 050F12B 075F12B 080J16B 100J14B

9MPD100J20B1, N9MP2100J20B1, 9MPD050F12B1, N9MP1100J20B1, N9MP1125J20B1 specifications

The Sears N9MP1075B12B1, N9MPD125L20B1, N9MP1050B12B1, N9MPD080J16B1, and N9MP2125J20B1 are part of the trusted line of gas furnaces manufactured by Sears, specifically designed to deliver reliable heating solutions for residential applications. These models incorporate cutting-edge technology and robust engineering, making them popular choices among homeowners looking for efficiency and comfort.

One of the main features of these models is their high-efficiency operation. With Annual Fuel Utilization Efficiency (AFUE) ratings exceeding 90%, these furnaces convert a significant portion of fuel into usable heat, thereby reducing energy costs. The N9MP series employs a multi-speed blower system that optimizes airflow for enhanced comfort while minimizing noise levels, ensuring a pleasant indoor environment.

The N9MPD125L20B1 and N9MPD080J16B1 variants highlight their adaptability through dual-stage heating capabilities. This technology allows the furnace to adjust its output based on the thermal demands of the home, preventing energy wastage during milder conditions while providing robust heating during extreme cold spells. The two-stage combustion process not only improves comfort but also contributes to lower greenhouse gas emissions.

Durability is another hallmark of these Sears models. With heavy-duty heat exchangers crafted from high-quality materials, they are built to withstand the rigors of regular use. Additionally, the inclusion of advanced safety mechanisms ensures that the system operates securely, reducing potential risks associated with gas furnaces.

The N9MP2125J20B1 model stands out due to its whisper-quiet operation. Homeowners can enjoy a warm home without the disruptive sound commonly associated with traditional heating systems, thanks to the insulated cabinet design and efficient blower operation.

Furthermore, these models come equipped with user-friendly digital thermostats, which allow precise temperature control and programmable settings, enabling homeowners to tailor their heating needs to fit their lifestyle. The compatibility with smart home systems also adds convenience, enabling users to manage their heating remotely, saving even more energy.

In conclusion, the Sears N9MP1075B12B1, N9MPD125L20B1, N9MP1050B12B1, N9MPD080J16B1, and N9MP2125J20B1 gas furnaces exemplify innovation in heating technology. Their energy-efficient designs, advanced features, and durable construction make them reliable choices for homeowners seeking comfort and sustainability in their heating solutions.
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