Sears N9MP2, N9MP1, 9MPD manual Leveling, Installation Requirements, Installation Positions

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Typical

Downflow

Installation

 

 

See VentTermination

 

 

 

Shieldingin VentSection.

Coupling

on

inside

and outside

of wall

 

 

 

 

to restrain

vent pipe

 

 

 

I_

"8" Min.

 

InletPipe

_

[_

20' Max.

 

(not usedon

 

_

in same

8" Min.

Single Pipe-------_

k,_k

atmospheric

zone

model)

 

_

 

 

 

VentPi_c ; MUST be

 

 

 

supl

Horizonta

 

 

 

and Vertically

 

 

 

Min.

 

 

 

 

 

Max. same

zone

* Increase minimum from 8" to 18" for cold climates (sustained temperatures

below O°F),

25-23-33a

Installation Requirements

1.Install furnace level.

This furnace is NOT to be used for temporary heat of build- ings or structures under construction.

3, Install furnace as centralized as practical with respect to the heat distribution system.

4.Install the vent pipes as short as practical. (See Ventand

Combustion Air Piping section).

5.Maintain clearance for fire safety and servicing. A front

clearance of 30" is required for access to the burner, con- trols and filter.

6.Use a raised base for upflow furnace if the floor is damp or wet at times.

For downflow installations, non combustible subbase must be used under the furnace unless installation is on a non

combustible floor surface. This requirement applies even when a coil box or cabinet is used.

FIRE HAZARD

Failure to install unit on noncombustible subbase can result in death, personal injury and/or property damage.

Place furnace on noncombustible subbase on down-

flow applications, unless installing on non-combus- tible flooring.

8.For horizontal installations, line contact is permissible only between lines formed by intersection of back and two sides of furnace jacket, and building joists, studs or framing.

9, Residential garage installations require:

Burners and ignition sources installed at least 18" above the floor.

Located or physically protected from possible damage by

avehicle.

10.Local codes may require a drain pan under the entire fur- nace and condensate trap when the furnace is installed in

attic application.

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 attached 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

attached 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 following:

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

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 1/4" from front to back and from side to side for upflow and downflow installations or top to bottom for horizontal installations.

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 u pflow 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.

44001 111400

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Contents SingleStage JellJill Denotes BrandMP D 0 75 F 12 a # 440 01 1114Furnace/Drip- Leg? YES Date of Start-UpCO2 ? Frozen Water Pipe Hazard Frozen and Burst Water Pipe HazardLocation and Clearances InstallationTypical Upflow Installation Winter ShutdownFurnace Installation Considerations Installation RequirementsInstallation Positions LevelingAiRI.TAKE Dimensions & ClearancesVENTrgMPD TOPHorizontal Furnace Installation Combustion & Ventilation Air For Single Pipe InstallationAir Openings and ConnectingDucts Confined Space Installation RequirementsUnconfined Space Installation EhrFree Area Make the Following Check Venting and Combustion Air CheckVent Check HoodDirect Vent N9MP2 Models Vent and Combustion Air PipingSingle Pipe N9MP1 Models Dual Certified gMPDModelsPipe Diameter Table N9MP2 Models Piping Insulation GuidelinesSizing Combustion Air and Vent Pipe Vent Termination ClearancesUnited States Only Condensate Drain TrapCondensate Drain Trap Freeze Protection Canada See Canadian Fuel Gas Code OtherThanDrainLine Upflow Installations Dual Certified *9MPD-A4 ModelsYellowPlasticCap TransitionSomemodels MountingScrews4Drain Models HorizontalLeft InstallationsDual Certified *9MPD-A4 25-24-12Rpeept.oT Switch HoseSi.g.Pre...reSwitch \ e.spre X3L/\Page ReturnAir Page Left Side Venting Satetrapandsecurewitha3/4clamp Boxandsecurewitha3/4clamp Drainstubonthetransitionandsecurewitha3/4clampStubonthecondensatetrapandsecurewitha3/4clamp VentFitting TPipe & Clamps InletReturn Air Return Modelsshownhave TwopressureswitchesCap Air ClampsLeft Vent Pipe Connection Connecting Vent and Combustion Air PipingCombustion Air Pipe Connection Dual Certified or PVCProper Sealing Procedure for Combustion Blower Horizontal TerminationVent Pipe Vertical Termination Using Exterior RisersCheckholesizesbymakingsureitissmallerthan the cou Vent Termination ShieldingSidewall Inlet Vent and Exhaust Air Termination Ei271Recommended Alternate Installation for Sustained ColdConcentric Vent and Combustion Air Sidewall Termination Rooftop Inlet Vent and Exhaust Air TerminationSupplyPressure Manifold Gas Pressure AdjustmentAlternate Btuh Input RatingsUSA Only Gas Supply PressureGeneral Derating Rules High Altitude Air Pressure SwitchChanging Orifices for High Altitude Changing OrificesNatural Gas Input Rating Check Typical Gas Piping for UpflowExample Humidifier/Electronic Air Cleaner Electrical WiringPower SupplyWiring Gas Piping RequirementsFan Timer Connections InstallationFan Delay DIP Switch Settings Ductwork and FilterInsulation Filter Installation using Optional Filter RackSizing FiltersAddition Of Air Conditioning Combustible Floor InstallationAvailablefromyourdistributor StandoffFilterRack Ubbase for Combustible FloorFurnace Subbase Coil CabinetTemperature Rise Check Checks and AdjustmentsAdjust Pilot Burner Main Burner Flame CheckChanging Blower Speed Tochecktemperaturerise,usethefollowingprocedureHeating and Continuous BlowerSpeed the Same Continuous Fan OperationHeating Request with Gas Supply Line Shut Off Gas Valve Diagnostic Codes See FigureCirculating Fan G Request OFFTypical Gas Valve Honeywell Honeywell SV9541M Flashes + Honeywell SV9541M Smart Valve Trouble shootingFlashes Flashes + SoftLockoutConcentric Termination Vent Termination ClearancesConcentric Vent Termination Kit # Arerequiredtocompletetheinstallation Concentric Vent Roof InstallationRain Cap to Vent Pipe Assembly Concentric Termination Kit NAHA001CV & NAHA002CV VentingConcentric Vent and Combustion Air Side Termination Concentric Vent Sidewall Attachment 25-22-02440011114O0 Save This Manual For Future Reference N9MP2075B12A4 N9MP2080F16A4N9MP2100F14A4 N9MP2100J20A4 N9MP2125J20A4 Denotes BrandSpecifications N9MP1 GeneralNAHA001LV NAHAO01LV NAHA002LV Specifications N9MP2Snap HW HSP Hwhsp PSC/I/2 PSC/II2Specifications 9MPD 3OONAHA00SLV For 100 Models 5 Ton 223/4 Units For 075 Models 3 Ton UnitsFor 100 Models Ton 19 & 22314 Units For 125 Models 5 Ton UnitsD22 Connection DiagramDisconnect Before Servicing Ladder Diagram = = =@O,c25-23-95 FF18125J Key Description PartFunctional 100J 125JLOOJ 125J Non-Functional Number 12A O50B 075B 080F LOOF LOOJ 125JIoof 1GA100F 100J KeyDescription No. Non-FunctionalNgMP1 050B 075B 080F 100F 100J 125J Number 16A 14A 20AGMPD Number KeyDescription No.FunctionalHeat Exchanger,Primary Heat Exchanger,Secondary 050F12AKeyDescription No.Non- Functional Models *9MPDO50F12A4, Natural Gas Replacement part supplied 080J16ANon- Functional Non-FunctionalKey Description Number

9MPD, N9MP1, N9MP2 specifications

The Sears N9MP2, N9MP1, and 9MPD are prominent models in the realm of residential heating systems, specifically designed to provide efficient and effective heating solutions. These models are part of Sears' commitment to quality and innovation, making them a popular choice among homeowners seeking reliability and performance.

The N9MP2 is a high-efficiency multi-speed gas furnace that boasts an impressive AFUE (Annual Fuel Utilization Efficiency) rating. This feature allows the furnace to convert a significant portion of fuel into usable heat, which effectively translates to lower energy bills for homeowners. The unit is equipped with a two-stage gas valve that provides increased comfort by adjusting the heating output based on demand, ensuring an even temperature throughout the home.

The N9MP1, like its counterpart, is known for its reliability and efficiency. It offers a single-stage operation that is ideal for homes needing consistent heating without the necessity for the more complex stages present in two-stage systems. This model also has a good AFUE rating, making it a cost-effective solution for families looking to reduce their heating expenses. Its design is tailored for easy installation and maintenance, allowing homeowners to keep their heating systems running at optimal performance without hassle.

The 9MPD model takes a step further with its advanced technology integration. It features a sophisticated control board that allows for easier diagnostics and enhanced system management. The 9MPD is also designed with quiet operation in mind, employing advanced sound-reduction technologies to minimize noise levels during heating cycles. Homeowners will appreciate the peace and quiet it brings, particularly in shared living spaces.

All three models are equipped with high-quality insulation and specialized heat exchangers that enhance their thermal efficiency. Additionally, they are designed with safety features such as automatic shut-off systems and robust flame rollout protection, ensuring a safe heating experience.

In terms of characteristics, these models are generally constructed with durable materials, designed to endure harsh weather conditions while providing consistent heating. They can be connected to various home automation systems, which adds to their appeal for tech-savvy consumers.

In conclusion, the Sears N9MP2, N9MP1, and 9MPD represent a comprehensive lineup of reliable, efficient, and technologically advanced heating systems suitable for contemporary homes. Their dedication to performance ensures that homeowners enjoy a warm and energy-efficient environment throughout the chilly seasons.
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