Sears 8MPL050B12B1, 8MPL075B12B1, 8MPL075F16B1, 8MPL100F20B1, 8MPL100J20B1, 8MPL125J20B1, 8MPN050B12B1, 8MPN075B12B1, 8MPN075F16B1, 8MPN100F14B1, 8MPN100F20B1, 8MPN100J20B1, 8MPN125J20B1, 8MPN150J20B1, N8MPL050B12B1, N8MPL075B12B1, N8MPL075F16B1, N8MPL100F20B1, N8MPL100J22B1, N8MPL125J20B1, N8MPL125J22B1, N8MPN050B12B1, N8MPN075B12B1, N8MPN075F16B1, N8MPN100F14B1, N8MPN100F20B1, N8MPN100J22B1, N8MPN125J20B1, N8MPN125J22B1 IReplacement Parts - *8MPL (NaturalGas) I

IReplacement Parts - *8MPL (NaturalGas) I

Models - *8MPL050B12B1, *8MPL075B12B1, *8MPL075F16B1, *SMPL100F20B1, *8MPL100J 20B1, *8MPL125J20B1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

Key Description Part

No, Functional Number 050B *075B

12B1 12B1

A Panel, Top 1 1

B Box, Junction

C Cover, Junction box

D Partition, Blower

E Housing, Blower

F Hanger, Blower

G Panel, Blower Cutoff

H

J

L

M

Clamp, Capacitor

Bracket, Control Mounting

Door, Blower (Heil/Arco)

(Heil/Arco)

(Heil/Arco)

(Comfortmaker Only)

(Comfortmaker Only)

(Comfortmaker Only)

(Tempstar Only)

(Tempstar Only)

(Tempstar Only)

Bracket, Door

Door, Louver

Manifold, Gas

(Heil/Arco)

(Heil/Arco)

(Heil/Arco)

(Comfortmaker Only)

(Comfortmaker Only)

(Comfortmaker Only)

(TempstarOnly)

(TempstarOnly)

(TempstarOnly)

S Bracket, Manifold Support

T Top,Burner Box

U Bracket, Burner Box Sides

V Baffle, Burner Box

W Bottom, Burner Box

1013982

1013983

1013984

1172860

1012350

1014009

1014010

1014011

1172885

1172969

1012328

721020013

721020008

1170643

1172845

1173011

1173012

1173013

1173008

1173009

1173010

1173014

1173015

1173016

1172231

1172232

1172233

1173005

1173006

1173007

1173002

1173003

1173004

1013609

1013610

1013611

1013478

1013479

1013480

1013481

1012377

1013705

1013015

1013016

1012532

1012338

1012339

1012340

1172847

1172848

1172849

1172850

1

1

1

2

1

1

1

1

1

1

1

1

2

1

2

1

1

1

1

2

1

1

1

1

1

1

1

1

2

1

2

1

075F

16B1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

2

1

2

1

*8MPL

IOOF

20B1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

2

1

2

1

100J

20B1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

2

1

2

1

125J

20B1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

2

1

2

441 01 2613 02 [_

Contents

Main 80+SingleStage CategoryIFurnace PrintedinU.S.A. 11/10/2005 441 01 2613 (02) N8MPN&N8MPL *8MPN&*8MPL SAFETY REQUIREMENTS YES_I NO_I YES_I NO_I NO [_I YEs_I NO[31 NO[_I NOE_I 1. Safe Installation Requirements Safety Rules Frozen Water Pipe Hazard Ifyourfurnace remains off for an extended time, the pipes in your 2. Installation Location and Clearances Installation Requirements Dimensions and Clearances (N8MPN/L) DIMENSIONAL INFORMATION 11124,10 213,4 Dimensions and Clearances (*8MPN/L Models) /41I J DIMENSIONAL INFORMATION T Installation Positions Horizontal Typical Horizontal Installation Main Line Entry Pressure Switch Relocation 3. Side Venting Rotating the Venter Assembly Typical Downflow Installation Furnace with Screws Venter Gasket 4. Combustion & Ventilation Air Outdoor Combustion Air Method Air Openings and Connecting Ducts Requirements Contaminated Combustion Air I/ SoffitVen, 4. Combination of Indoor and Outdoor Air shall have: FreeArea Indoor Combustion Air Standard and Known-Air-Infiltration Rate Methods 75 I If: [ other=combined input of all other than fan-assisted appliances in Btu/hr ACH =air changes per hour (ACH shall not exceed 0.60.) Ventilation Air 5. Gas Vent Installation /2N Venting to Existing Masonry Chimney NOTE: Two (2) 45 elbows are equivalent to one (1)90 elbow. Combined Venting into a Masonry Chimney 6. Horizontal Venting Category I Furnaces With External Power Venters Vent Termination Venting Through a Non-Combustible and Combustible Wall iiiiiiiiiiiiiiiiiiiiiiiiiiiii i i! ii ii ! i ! !i ! ii i i i i i i i i i i i Other than Direct Vent Termination Clearance IVIVENTTERMINAL AIRSUPPLVINLET 3'(01cm) 7'(2.13m) 7. Masonry Chimney Venting Chimney Inspection Connector Type VentingRestrictions for Chimney Types 5. The authority having jurisdiction approves. Oondonsoto ",,<u,ob,,y sll ed,,stedfle,ib,o eta, j Tu_ I NotSuitable andlinerorventmanufacturer's \/I-,,<u,,ab,,y Exterior Masonry Chimney, FAN+NAT Installations with Type-B Double-Wall Vent Connectors APPLIANCE APPLICATION REQUIREMENTS Vent dampers onany appliance connected 8. Gas Supply and Piping GasPiping Requirements GasSupply Requirements IGasPressures RightSide Gas SupplyPiping (N8MP) Left Side Gas Supply Piping (N8MP) Piping with Street Elbows Gas Valve with Elbows (N8MP) Piping with Close Nipples and Standard Elbows Final Check 9. Electrical Wiring Power Supply Wiring J- Box Relocation N8MPN/LModels *8MPN/L Models .0M 10. Ductwork and Filter (Upflow/Horizontal) Duct Connections Cutting Side Return Air Opening Duct Design Duct Installation Requirements InspectionPanel on some models Filters A filter MUST be used. High-Velocity Air Filter Sizes (max.600FPM) Addition Of Air Conditioning 11. Ductwork and Filter (Downflow) Exploded View of Sub-Base for Furnace ONLY i!i ii Sub-base for Combustible Floors -Downflow Coil Adapter Box Condensate Line Raised by Base Non-Combustible Floor Duct Connections o Startup GasSupply Pressure Manifold Gas Pressure Adjustment 2. Turn gas ON. Operate the furnace by using a jumper wire on wiseto decrease manifold pressure and clockwise to Natural Gas Input Rating Check Example Orifice Sizing FIRE, EXPLOSION, CARBON MONOXIDE POISONING HAZARD. MANIFOLDPRESSUREAND ORIFICE SIZE FORHIGH ALTITUDEAPPLICATIONS NATURAL GAS MANIFOLD PRESSURE (" w.c.) High Altitude Air Pressure Switch Changing Orifices Manifold LP Conversion Main Burner Flame Check Ignitor Location Air TemperatureRise Check REDUCED FURNACE LIFE HAZARD Changing Blower Speed Continuous-Fan Operationusing "G" Hard Wired Continuous-Fan Operation 13. Furnace Maintenance 14. Sequence of Operation & Diagnostics Cooling () Request: Continuous Circulating Fan (G) Request: Continuous Circulating Fan Hard-Wired (Cont) Request: Heating (W) Request: Heating Request with Gas Shut Off: Control Board Diagnostic Codes (See Figure 40) * Proper flame sense microamps: 0.7 microamps D.C. minimum 2.0 - 4.0 microamps nominal Control Board II I I I Models ALL Models(N8MPN) GasType NatI LP NatI LPNatI NatI NatI NatI NatI LP NatI THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE 44101261302 ALL Models(N8MPL) OasType .atI LP .atI LP .at .at .at .at .at I LP 441ol261302 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE [_1 ALL Models(*8MPN) THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE 44101261302 ALL Models(*8MPL) OasType .at l,P .at I LP .at I LP .atl'P .at l_P .at l_P 441Ol261302 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE [_1 Mao,o,dPress._,och'sWC_3.5I10.0 3.5I10.0 3.5I10.0 3.5I10.0 3.5I10.0 3.5I10.0 15. Circulation Air Blower Data (CFM) 1 I IIMAxO Ms THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE 44_01261302 1 C 1 IIIMAxO Ms 44101261302 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE [_1 N8MPN/L125J22(2)(6) _ISMPN150J20(2)(7)*DenotesBrand + + III, _ --R R-- -@ HOT END.,ERLOC.' O=O. --o -- -_ ,EUTRAL I L SWITCH f_._ . / I--g%RESSURESW,TCHY_GNTER" I+" I ,,OUCER N 211o. II,DU_ER%I_.ICAPACITOR a_" o_ ........... _ -o , +,__:_ _ ._ _ o_, \ [Replacement Parts - N8MPN (NaturalGas) I Page [Replacement Parts - N8MPN (NaturalGas) Page Page Page Parts for *8MPN/L x \ T Page Page | Page IReplacement Parts - *8MPL (NaturalGas) I | IReplacement Parts - 8MPL (NaturalGas) I