Sears 9MPD075F12B1 Electrical Wiring, Installations, Thefurnacesidepanel, Power SupplyWiring

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NOTE:RefertoFigure30orFigure31forthegenerallayoutat

thefurnaceTheruleslistedapplytonaturalandLPgaspipe.

installations.

NOTE:OntheDualCertifiedorDirectVentmodels,installthegas

pipegrommettothefurnacesidepanelwiththegaspipeentryIf.

needed,removethe2"holeplugandrelocatetotheopenholein

thefurnacesidepanel.

FIRE OR EXPLOSION HAZARD

Failure to properly install metal gas connector could result in death, bodily injury and/or property damage.

A flexible corrugated metal gas connector must be properly installed, shall not extend through the side of the furnace,and shall not be used inside the furnace.

Black iron pipe shall be installed at the furnace gas control valve and extend a minimum of 2" outside

furnace casing.

4.Use black iron or steel pipe and fittings or other pipe ap- proved by local code.

NOTE: The use of copper tubing for gas piping is NOT approved by the state of Massachusetts.

5.Use ground joint unions and install a drip leg no less than 3" long to trap dirt and moisture before it can enter gas valve.

6.Use two pipe wrenches when making connections to pre- vent gas valve from turning.

7.Install a manual shut-off valve external to furnace casing and tighten all joints securely.

Additional LP Connection Requirements

1.Have a licensed LP gas dealer make all connections at stor-

age tank and check all connections from tank to furnace.

2.If copper tubing is used, it MUST comply with limitation set in National Fuel Gas Code or CGA codes.

3.Two-stage regulation of LP gas is recommended.

Final Check

The furnace and the gas valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2" PSIG. Close the manual shut-off valve before testing at such pressures.

When installation is complete, test all pipe connections for leaks with the gas pressure less than 1/2' , PSIG to the gas valve.

3.Apply a commercial soap solution to all joints to test for leaks. Correct any leaks indicated by bubbles.

4.Correct even the smallest leak at once.

5.Check for leaks at gas valve and orifice connections to the burner manifold along with the pilot tube connections to the valve and pilot assembly while the furnace is operating.

6. Electrical Wiring

ELECTRICALSHOCK HAZARD.

Failure to do so could result in death, personal injury and/or property damage.

Turn OFF electrical power at fuse box or service panel before making any electrical connections and ensure a proper ground connection is made before connecting line voltage.

Power SupplyWiring

The furnace MUST be electrically wired and grounded in accor- dance with local codes, or in the absence of local codes with the latest edition of The National Electric Code, ANSI N FPA 70 and/or The Canadian Electric Code CSA C22.1.

The power supply to the furnace connections must be between 104 VAC and 127 VAC during furnace operation for acceptable performance.

Field wiring connections must be made inside the furnace connec- tion box. A suitable strain relief should be used at the point the wires exit the furnace casing.

conform to temperature limitation of 63 ° F (35 ° C) rise and be sized for the unit maximum amps stated on the rating plate. Add the full

load amps for potential field-installed accessories such as elec- tronic air cleaners and humidifiers that would receive power from

the furnace control. The furnace control is rated for a maximum of

I Copper conductors shall be used. Line voltage wires should

0.8amps combined for EAC and Hum. Consult N EC or local codes for proper wire and circuit sizing.

J- Box Relocation

The j-box is installed on left side of casing. An alternate j-box location on right side can be used.

1.Remove bag containing two hole plugs and two self tapping screws from loose parts bag in blower compartment.

2.Remove two screws holding j-box to casing.

3.Move large hole plug from right to left j-box location.

4.Move j-box to alternate location and attach using two self tapping screws from bag.

5.Apply two hole plugs from bag at left j-box location.

Thermostat

Thermostat location has an important effect on the operation of the

unit. Follow instructions included with thermostat for correct mounting and wiring.

Low voltage connections to furnace must be made on terminal board to fan control.

Set thermostat heat anticipator in accordance with the Technical Support Manual.

Optional Equipment

All wiring from furnace to optional equipment MUST conform to lo- cal codes or, in the absence of local codes with the latest edition of The National Electric Code, ANSI NFPA 70 and/or The Canadian

Electric Code CSA C22.1. Install wiring in accordance with

manufacturer's instructions. The wiring MUST have a minimum

temperature rating of 105 ° C.

Humidifier/Electronic Air Cleaner

The furnace is wired for humidifier and/or electronic air cleaner connection.

440O1102004

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Contents SingleStage Table of ContentsThis page for future reference KeepYES NOE YESSafety Rules Installation FrozenWater Pipe HazardLocation and Clearances Installation Requirements Typical Upflow InstallationTypical Downflow Installation Dimensions & Clearances Leveling Air Openings and Connecting Ducts Combustion Ventilation AirRequirements Example Venting and Combustion Air CheckUnusually Tight Construction Ventilation AirVent and Combustion Air Piping For Two Pipe InstallationSingle Pipe N9MP1 Models Direct Vent N9MP2 ModelsPiping Insulation Guidelines TocompensateforoxygenburnedSee.Confined Space InstallaContaminated Combustion Air Vent and Combustion Air Piping GuidelinesN9MP1 & *9MPD Models Sizing Combustion Air and Vent PipeVent Termination Clearances Carbon Monoxide POISONING, Fire and Explosion HazardClearance Description 440O110200415cmforappliances10,OOOBTUH3kW,12 Condensate Drain Trap Freeze Protection CondensateDrain TrapUpflow Installations Top Vent See Figure Upflow Installations Top VentUpflow Installations Vent thru Left Side See Figure UpflowInstallationsVentthru LeftSideSwitch Side ViewAll ModelsVentthru RightSide All Models Vent thru Right Side See FigureOnly Downflow Left Side Vent and Trap SeeFigure Inlet 4=Downflow Right Side Vent and Trap See Figure Downflow Right Side Vent and TrapPVC 3/4 Coupling & Clamps 112ID Drain Hose On SomeHorizontal Left-Thru Top See Horizontal Left Thru TopHorizontal Left-Side Vent Horizontal Left-Side Vent See FigureYellowor black Horizontal Right thru Top16ID Rubber Tube\\ Relief Tube ExtensionHorizontal Right Side Vent SeeFigure HorizontalRight-SideVentConnecting Vent and Combustion Air Piping Connecting Tee Trap to Condensate Trap and Main Drain LineOpen Tee Tee TrapProper Sealing Procedure for Combustion Connecting Vent Pipes and TerminationVent Pipe Connection Fire HazardHorizontal Termination Using Exterior RisersVertical Termination Vent Termination ShieldingConcentric Vent and Combustion Air Sidewall Termination Multi Vent Termination ClearancesSidewall Inlet Vent and Exhaust Air Termination CmbustincncentricRoof -AirTerminationventandSupply Pressure Manifold Gas Pressure AdjustmentGas Supply Pressure IAIternate Input Ratings, USA onlyPressure NaturalFor the 50,000, 75,000, 100,000 and 125,000 Btuh Models TaiGeneral Derating Rules High Altitude Air Pressure SwitchElectrical SHOCK, Fire or Explosion Hazard Changing OrificesManual shut- off Gas Piping RequirementsLow Pressure ValveInstallations Electrical WiringPower SupplyWiring Humidifier/Electronic Air CleanerFan Timer Connections Fan Delay DIP Switch SettingsReduced Furnacelife Hazard Mountedto eithertheleftorrightDuctwork and Filter InstallationSizing InsulationDownflow Furnace Installation Filter Installation using Optional Filter RackCombustible Floor Installation Downflow applications, unless installing on nonSubbasesforCombustibleFloorsDimensions FloorDimensionsFurnace Subbase Adjust Pilot Burner Checks and AdjustmentsGas SupplyPressure StartupHeating and Continuous BlowerSpeed Same Temperature Rise CheckChanging Blower Speed Reduced Furnace Life HazardFIRE, EXPLOSION, or Carbon Monoxide Hazards Furnace MaintenanceCirculating Fan G Request Heating W RequestHeating Request with Gas Supply Line Shut Off Typical Gas Valve Honeywell Gas Valve Diagnostic Codes See FigureOFF ThanHoneywell SV9541M Smart Valve Sequence of Operation Flashes Flashes + I Flash Honeywell SV9541M Smart Valve Trouble shootingLED IndicatesVent Termination Clearances Concentric TerminationConcentric Vent Termination Kit # LED INDICATESCHECK/REPAIRTicalterminationispreferredFieldsuppliedpipeandfittingsare RequiredtocompletetheinstallationConcentric Vent and Combustion Air Side Termination Rain Cap to Vent Pipe AssemblyTable for N9MP2 Models 50,000 & 80,000 Btuh Furnaces Roof OverhangConcentric Vent Sidewall Attachment Air Elbow25-22-02 N9MP2100F14B1 N9MP2100J20B1 N9MP2125J20B1 N9MP2075B12B1 N9MP2080F16B1Denotes Brand 25-23-30Model Specifications Specifications N9MP1General Gas & Ignition Specifications N9MP2BlowerData Specifications 9MPDFor 075 Models 3 Ton Units For 050 Models 3 Ton UnitsFor 100 Models Ton 19 & 22314 Units For 080 Models 4 Ton 19 & 22314 UnitsNeutral t IlttlData UI I BKw25-23-95 Functional Key Description Part125J 100J 125J1GB Non-Functional14B 20B 12B 16B 14B16B 14B 20B 12B No. Non-FunctionalN9MP1 N9MP2 Osob Key DescriptionPart not Illustrated NAHF002LPNumber 080F12B 075F12B 080J16B 100J14B 9MPD100J20B 128L20B Capacitor,7.SMfd.,370VKeyDescription No.Non- Functional Parts *gMPDNumber 050F12B 078F12B 080J16B 100J14B 100J2OB 125L20BNon- Functional Part GMPDNumber 050F12B 075F12B 080J16BNon- Functional Number 1013816 + Order from Service Parts 44001050F12B 075F12B 080J16B 100J14B IOOJ20B

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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