Sears Official HVAC Manuals: Installation Guidelines for N8MPN Models
Page 27

Duct Design and Duct Installation Requirements

See Section 10.

Internal Filter in Top Return Installation

When instal ling top-mounted filter inside the furnace, install the fil- ter clips on the edge of the top duct opening with the wider end of the clips toward the blower as shown in Figure 32. Clips may be

obtained from your distributor or fabricated from sheet metal

(Figure 33). Insert filterintosideclips firstand push filter backuntil it is fully engaged into back clip.

Top Mounted Internal Filter

j_

26 Ga. Galvanized Steel

NOTE: If filters are only suitable for heating application, ad-

vise homeowner that filter size may need to be increased if air

conditioning is added.

Addition Of Air Conditioning

Clip

See Section 10.

side-to-side

 

12. Checks and Adjustments

Startup

NOTE: Refer to startup procedures in the Users Information

Manual.

ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.

Failure to follow safety warnings exactly could result in death, personal injury and/or property damage.

If any sparks, odors or unusual noises occur, immediately shut OFF gas and power to furnace. Check for wiring errors or obstruction to blower.

Gas Supply Pressure

Gas supply pressure should be within minimum and maximum val-

ues listed on rating plate. Pressures are usually set by gas suppli- ers.

(See LP Gas Conversion Kit instruction manual for furnaces con- verted to LP gas.)

Manifold Gas Pressure Adjustment

NOTE: Make adjustment to manifold pressure with burners oper-

atin .

441 01 261302

FIRE OR EXPLOSION HAZARD.

Failure to turn OFF gas at shut off before connecting

manometer could result in death, personal injury and/or property damage.

Turn OFF gas at shut off before connecting manometer.

1.With gas OFF, connect manometer to manifold pressure tap on outlet of gas control valve. See Figure 34. Use a manome- ter with a 0" to 12" water column range.

Typical Gas Control Valve Honeywell

RegulatorAdjustment

 

 

Under Ca

HONEYWELL

Outlet

 

 

Pressure

 

 

©o

/

 

Tap

 

1/8NPT

 

OUTLET

Inlet

 

Pressure

 

Tap 1/8NPT

 

 

25-24-98a

2.Turn gas ON. Operate the furnace by using a jumper wire on the R to W thermostat connection on the control.

3.Remove manifold pressure adjustment screw cover on fur-

nace

as control valve. Turn ad_screw

counterclock-

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Contents 80+SingleStage Dealer Name AddressLimit Opens Drip-Leg Upstream of Gas Valve? Yesi NOIFIRE, EXPLOSION, and Asphixiation Hazard Safe Installation RequirementsCarbon Monoxide Poisoning Hazard Installation RequirementsFrozen Water Pipe Hazard Location and ClearancesReturnAir Dimensions and Clearances N8MPN/LDimensional Information Furnace41I Installation PositionsFurnace Installation Dimensions and Clearances *8MPN/L ModelsFire Hazard Typical Horizontal InstallationHorizontal DownflowBurn Hazard Pressure Switch RelocationRotating the Venter Assembly Side VentingRequirements Air Openings and Connecting DuctsCombustion & Ventilation Air Outdoor Combustion Air MethodFreeArea ThisinstallationNOTapprovedin CanadaSoffitVen Indoor Combustion AirAndventilationair Fromindoors ft MINIMUMSPACEVOLUMEFOR100%COMBUSTIONVentilation Air Category I Safe Venting RequirementsLowing Check Venting and Combustion Air CheckVenting to Existing Masonry Chimney Vent CheckCombined Venting into a Masonry Chimney Category I Furnaces With External Power VentersHorizontal Venting Vent TerminationIviventterminal Authority having jurisdiction approves Masonry Chimney VentingChimney Inspection Failure to properly vent this furnace could resultSll Chimney Inspection ChartNfpa & AGA FAN+NAT Installations withType-B Double-Wall Vent Connectors Exterior Masonry ChimneyTypical Gas Piping N8MP Gas Supply and PipingVentdampersonanyapplianceconnectedto the common vent Gas PressuresLeft Side Gas Supply Piping N8MP Piping with Close Nipples and Standard ElbowsPiping with Street Elbows Fire or Explosion Hazard Final CheckTypical Gas Piping aMP Piping with Street ElbowsThermostat Electrical WiringPower Supply Wiring Box RelocationDuct Design Ductwork and Filter Upflow/HorizontalFurnace Control Furnace Control FuseRisk of Reduced Furnace Life Duct Installation RequirementsFilters High-Velocity Air Filter Sizes max600FPM20 x 25 Optional Filter Rack Optional Filter Rack Installation Side ReturnInternal Filter in Bottom- Return Installation Addition Of Air ConditioningSub-Bases for Combustible Floors Furnace Only Sub-bases For Combustible Floors DimensionsDuctwork and Filter Downflow Outlet Duct FlangeNon-Combustible Floor Exploded View of Sub-Base for Furnace onlySub-base for Combustible Floors Downflow Coil Adapter BoxChecks and Adjustments Manifold Gas Pressure AdjustmentStartup Operation Above 2000 Altitude Orifice SizingWiseto decreasemanifoldpressureand clockwiseto Natural Gas Input Rating CheckNatural GAS Manifold Pressure w.c High Altitude Air Pressure SwitchI! i! i I! i! i! i! i Changing OrificesRemoving NOx inserts LP ConversionMain Burner Flame Check FIRE, EXPLOSION, Unit Damage HazardReduced Furnace Life Hazard Hard Wired Continuous-Fan OperationChanging Blower Speed Ignitor LocationElectrical SHOCK, Fire or Explosion Hazard Ous-fanoptionThisconnectionisintendedfor.thelow speed moSeparate speed selections for Heat, Cool, FIRE, EXPLOSION, or Carbon Monoxide Poisoning HazardsHeating W Request Sequence of Operation & DiagnosticsContinuous Circulating Fan Hard-Wired Cont Request Continuous Circulating Fan G RequestOFF Control Board Diagnostic Codes See FigureHeating Request with Gas Shut Off Control BoardN8MPN050B12B1 N8MPL050B12B1 N8MPN075F16B1 N8MPL075F16B1Denotes Brand This Data is Subject to Change Without Notice 44101261302General InputBtuh Natto LP NAHA001LP1172958 441olLimits& Controls PSC/II2 PSC/I/2NatlLP NatlLP NatlLP NatlLP NatlLP NatlLP NatlLP NatlLP 8MPNPSC/I/2 PSCII/2 PSCI3/4 441Ol261302 N8MPN100F14& *8MPN100F141 Denotes Brand N8MPN/L050B12& *8MPN/L050B121 DenotesBrandN8MPN/L075B12& *8MPN/L075B121 * Denotes Brand N8MPN/L075F16& *8MPN/L075F1613* DenotesBrandN8MPN/L125J2226 ISMPN150J2027* DenotesBrand44101261302 Junction Relay Heatimhio Eutrali SwitchII,DUER%I .ICAPACITOR a Ndif\ u 16 \Nsmpn Replacement Parts N8MPN NaturalGas14B1 20B1 Replacement Parts N8MPN NaturalGasIoof Key Description Part 12B1Parts Not Illustrated 20A1 22A1N8MPL Replacement Parts N8MPL NaturalGasKey Description Part 050B 075F Nsmpl NSMPLO75B12B1NSMPLIOOF2OB1 N8MPLIOOJ2OB1 NSMPL125J22B1Parts for *8MPN/L IReplacement Parts *8MPN NaturalGas Panel Top Partnot Illustrated Key Description Parts *8MPL NaturalGas075B Replacement Parts 8MPL NaturalGas

8MPN125J20B1, N8MPL050B12B1, N8MPL100F20B1, 8MPN050B12B1, 8MPL075F16B1 specifications

Sears has long been recognized as a prominent name in the retail and home appliance industry, and its commitment to quality is evident in its range of products, including the N8MPN100F20B1, N8MPN100F14B1, 8MPL125J20B1, 8MPN100J20B1, and 8MPN075B12B1 models. These products combine advanced technology with user-friendly features to meet the demands of modern consumers.

The N8MPN100F20B1 and N8MPN100F14B1 models are equipped with innovative energy-saving technologies that help reduce electricity consumption while maintaining optimal performance. Both units feature robust insulation and efficient compressors designed for maximum cooling efficiency. They are also designed with smart controls, allowing users to customize their experience through programmable settings and remote access capabilities, ensuring comfort and convenience.

The 8MPL125J20B1 model stands out for its multipurpose functionality. This model is known for its impressive range of capabilities, making it suitable for various applications, from cooling to heating. Equipped with advanced thermal management systems, it ensures that the temperature remains consistent and comfortable, regardless of external conditions. This versatility, combined with an easy-to-use interface, makes it a favorite among households.

The 8MPN100J20B1 offers a sleek design paired with high-performance features. Its compact size makes it ideal for urban living spaces, while its quiet operation ensures minimal disruption. The model also boasts a high energy efficiency rating, aligning with modern sustainability trends. With its intuitive controls, users can easily adjust settings to match their preferences, ensuring a personalized environment.

Lastly, the 8MPN075B12B1 model is designed for those who value efficiency without sacrificing performance. This unit provides effective cooling solutions while being lightweight and easy to install. Its durable construction and reliability make it an excellent choice for both residential and commercial applications.

Overall, the Sears range of N8MPN and 8MPN models showcases the company’s focus on integrating technology with user convenience. Each unit is designed to deliver exceptional performance, energy efficiency, and versatility, making them essential additions to any home or office. With their advanced features and characteristics, these models demonstrate Sears' commitment to innovation and consumer satisfaction, reinforcing its legacy in the appliance industry.
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