Sears N8MPN125J20B1 manual

80+ Single Stage Category I Furnace N8MPN & N8MPL *8MPN & *8MPL * Denotes Brands (C, H, T) See section 5 for Category [ definition. SAFETY REQUIREMENTS Recognize safety information. This is the safety-alert symbolZl._. When you see this symbol on the furnace and in instruction manuals be alert to the potential for personal injury. Understan[...]

START-UP CHECK SHEET (Keep this page for future reference) Recommended, but not required, Dealer Name: Address: City, State(Province), Zip or Postal Code: Business Card Here Phone: Owner Name: Address: City, State(Province), Zip or Postal Code: Model Number: Serial Number: Natural: _1 LP: _1 Type of Gas: Blower Motor H. P,: Supply Voltage: Limit Op[...]

1. Safe Installation Requirements FIRE, EXPLOSION, AND ASPHIXIATION HAZARD Improper adjustment, alteration, service, maintance or installation could cause death, personal injury, and/or property damage. Installation or repairs made by unqualified persons could result in hazards to you and others. Installation MUST conform with local codes or, in th[...]

Frozen Water Pipe Hazard If your furnace remains off for an extended time, the pipes in your home could freeze and burst, resulting in serious water damage. FROZEN AND BURST WATER PIPE HAZARD Failure to protect against the risk of freezing could result in property damage. Do not leave your home unattended for long periods during freezing weather wi[...]

The air temperature rise is within the rated rise range on the furnace rating plate, and the firing rate has been setto the rating plate value. The filters used to clean the circulating air during the construction process must be either changed or thor- oughly cleaned prior to occupancy. • The furnace, ductwork and filters are cleaned as neces- s[...]

Dimensions and Clearances (*8MPN/L Models) TOP LEFT SIDE • Plugged starting I hole to cut side 131/4 _¢t opening 21814 17/8 / 26518 5113 5f__ _ _1 -- 3314 7/8 1 47/ 11/2 _E "24"Min. --A_ -- B -- 38 FRONT ® MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS FOR ALL UNITS REAR 0 FRONT (combustion air openings 3" in furnace and structure) [...]

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3. New labels for rightside-up application on outside ofblower compartment door may be purchased in a kit from your distrib- utor tocover upside-down labels. Downflow Venting: The combustion venter MUST be rotated to vent out the side for all downflow installations, (see Figure 5). Bot- tom venting is not permitted. See"Side venting" for [...]

7. Tighten the three (3) or four (4) screws that secure the venter assembly to the collector box. Do tighten screws enough to compress venter gasket. 8. Replace power leads to venter motor and reconnect hose to pressure switch. NOTE: Unused open vent hole must be covered. A Vent Cover is supplied with Vent Pipe Shield Kit NAHAOO2VC. A 55/16" d[...]

Outside Air (This is ONLY a guide. SubJect to codes of country having jurisdiction.) This installation NOT approved in Canada Gas Vent , Gable V_/) (1) Soffit Vent Inlet Air (1) Minimum One Inlet and One Outlet Air Supply is Required May be in and Combination Shown Inlet Air Opening Must be Within12"(300mm) of floor Outlet Air Opening Must be [...]

The Standard Method may be used, if the space has no less vol- ume than 50 cubic feet per 1,000 BTUH of the maximum input rat- ings for all gas appliances installed in the space. The standard method permits indoor air to be used for combustion and ventila- tion air. The Known Air Infiltration Rate Method shall be used if the in- filtration rate is [...]

Z223.1-2002/N FPA 54-2002; and/or Section 7 and Appendix C of the CSA B149.1-05, National Standard ofCanada, Natural Gas and Propane Installation Code; the local building codes; furnace and vent manufacturer's instructions. NOTE: The following instructions comply with the ANSI Z223.1/NFPA 54 National Fuel Gas Code and CSA B149.1 Natu- ral Gas [...]

13.2 or a listed, metal lining system. (See Section 7 Masonry Chimney Venting of these instructions.) Listed, corrugated metallic chimney liner systems in masonry chimneys shall be sized by using NFGC tables per 13.1.7 for dedi- cated venting and per 13.2.19 for common venting with the maxi- mum capacity reduced by 20% (0.80 X maximum capacity) and[...]

iiiiiiiiiiiiiiiiiiiiiiiiiiiii i i! ii ii ! i ! !i ! ii i i i i i i i i i i i Item A B C 9 E F G H I J K L M N 0 Other than Direct Vent Termination Clearance IVIVENTTERMINAL AIRSUPPLVINLET Clearance Descriptions Canadian Installation (1) Clearance above grade, veranda, porch, deck, balcony, or 12" (30cm) # anticipated snow level Clearance to a [...]

7. Masonry Chimney Venting Chimney Inspection All masonry chimney construction must conform to Standard ANSI/NFPA 211-2003 and to any state or local codes applicable. The chimney must be in good condition and a complete chimney inspection must be conducted prior to furnace installation. If the in- spection reveals damage or abnormal conditions, mak[...]

CHIMNEY INSPECTION CHART For additionalrequirementsrefer tothe National Fuel GasCodeNFPA541ANSI Z223.1-2002andANSIINFPA211-2003 Chimneys, Fireplaces, Vents,and Solid Fuel Burnin 9 Appliances in the U.S.A. or to the CanadianInstallation Code CSA B149.1-05 in Canada. Rebuild I Reline .._ Remove mortar 1_ andtile debris? tile m.isalignment, Yes mg sec[...]

Exterior Masonry Chimney, FAN+NAT Installations with Type-B Double-Wall Vent Connectors VENT HEIGHT (FT) 6 8 10 15 20 30 © NFPA & AGA Table A- Combined Appliance Maximum Input Rating in Thousands of Btu per Hr INTERNAL AREA OF CHIMNEY (SQ IN,) 12 19 28 38 74 119 178 257 80 130 193 279 84 138 207 299 NR 152 233 334 NR NR 250 368 NR NR NR 404 Ta[...]

Vent dampers onany appliance connected to the common vent can cause condensation and corrosion in the venting system. Do not use vent dampers on appliances common vented with this fur- nace. 8. Gas Supply and Piping CARBON MONOXIDE POISONING, FIRE AND EXPLOSION HAZARD. Gas Piping Requirements NOTE: The gas supply line must be installed by a qualift[...]

5, 6, 7. Use ground joint unions and install a drip leg no less than 3" long to trap dirt and moisture before it can enter gas control valve inside furnace. Provide a 1/8" NPT plugged tapping for test gauge connection immediately up stream of gas supply connection to furnace. Use two pipe wrenches when making connections to prevent furnac[...]

Typical Gas Piping ('aMP) 25-25-02 Piping with Street Elbows 1. Screw one elbow onto gas valve with the outlet facing away from the furnace. 2. Screw second elbow onto first elbow tight enough to be leak proof. An additional 1/4 turn will be required at the end of step 2. See Figure 17 and Figure 18. Gas Valve with Elbows ('8MP) 25-25-03 [...]

9. Electrical Wiring ELECTRICALSHOCK HAZARD. Failure to follow safety warnings exactly could result in death or personal injury. 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 Supply Wiring The furnace MUST be electri[...]

Electrical Connections 115V. 60Hz. Gr_nd Thermostat I ! , I L ] _ _ Low Voltage Terminal Board NOTE: 115 VAC/6OHz/single-phase Operating voltage range*: 127 VAC max, 104 VAC min. * Permissible limits of voltage at which unit will operate satisfactorily Furnace Control The furnace control is preset at the factory with ON delay of 30 sec- onds in the[...]

area. It is often advisable to route the return air ducts under the Filters are not supplied with these furnaces, but can be purchased floor or through the attic, from your distributor. • Refer to furnace Technical Support Manual (Blower Data) for air flow information. • Size ductwork to handle air flow for heating (and air condition- ing if so[...]

Optional Duct Standoff Filter 20 x 25 Optional Filter Rack 25-23-05-4 Optional Filter Rack Installation: Side Return Center the filter rack on the side panel, flush with the bottom edge of the furnace. Mark the fastening holes. Drill the fastening holes in the side panel and fasten the filter rack in place with sheet metal screws. See Figure 23 and[...]

11. Ductwork and Filter (Downflow) CARBON MONOXIDE POISONING HAZARD. Failure to properly seal duct could result in death or personal injury. Do NOT draw return air from inside a closet or utility room where furnace is located. Return air duct MUST be sealed to furnace casing. FIRE HAZARD. Failure to install furnace on noncombustible subbase could r[...]

Exploded View of Sub-Base for Furnace ONLY I tr Combustible Floor Base ¸i!i i¸i Subbase Furnac_ Insulation Wood Screw Setting the Base / _. % _W_°°d Fl°°r Sub-base for Combustible Floors - Downflow Coil Adapter Box The subbase for combustible floors is required when a downflow furnace, used with a downflowcoilbox, is set on combustible floori[...]

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 fabri[...]

wise to decrease manifold pressure and clockwise to Operation Above 2000' Altitude increase pressure. NOTE: Adjustment screw cover MUST be replaced on gas control valve before reading manifold pressure and operating furnace. 4, 5. Set manifold pressure to value shown in Table 6 or Table 7. When the manifold pressure is properly set, replace th[...]

MANIFOLD PRESSUREAND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS NATURAL GAS MANIFOLD PRESSURE (" w.c.) .............................................................. MEAN ELEVATION FEET ABOVE SEA LEVEL HEATING 0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to VALUE 2000 3000 4000 5000 6000 7000 8000 at ALTITUDE Orifice Manifold Orifice Man[...]

9. After reassembling, turn gas on and check all joints for gas leaks using a soapy solution. All leaks must be repaired im- mediately. Clearances Measure from face of orifice to the batck side of the manifold, 29.3 +_11"5 mm "k,,..k--..,.,.r_ j LP Conversion I An accessory kit shall be used to convert to propane gas use, see the furnace[...]

Ignitor Location NOTE: Flame sensor has a different orientation in all 050 models. Air Temperature Rise Check REDUCED FURNACE LIFE HAZARD Failure to properly set the air temperature rise may result in reduced furnace life. Use ONLY the blower motor speed taps marked "Y" for YES for setting air temperature rise. Blower Motor Speed Taps for[...]

ous-fan option. This connection is intended for the low speed mo- tor tap, and has a lower contact rating (8 amps) than the heat and cool taps. When the low speed blower lead is connected to this terminal, this will provide low speed blower operation whenever the other two speeds (Heat or Cool) are not energized. EAC not powered in this mode. Thoro[...]

14. Sequence of Operation & Diagnostics The following is the normal operating sequence. Cooling (¥) Request: 24VAC signals applied to Y & G terminals of FCB (furnace control board) • Cool motor speed is energized after 5 second Cool Fan On Delay time. Y & G signals removed from FCB • Cool motor speed is de-energized after 90 second[...]

Heating Request with Gas Shut Off: 24 VAC signal applied to W terminal of FCB. The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours then try for ignition again as long as the heat call remains. Power reset will clear lockout. • Inducer motor turns on • Following a 15 second prepurge delay, the igniter begins warm up. ?[...]

II I I ® I Save This Manual For Future Reference N8MPN050B12B1 N8MPN075B12B1 N8MPN075F16B1 N8MPN100F14B1 N8MPN100F20B1 N8MPN100J22B1 N8MPN125J20B1 N8MPN125J22B1 *8MPN050B12B1 *8MPN075B12B1 *8MPN075F16B1 *8MPN 100F14B1 *8MPN100F20B1 *8MPN100J20B1 *8MPN125J20B1 *8MPN 150J20B1 * Denotes Brand Models N8MPL050B12B1 N8MPL075B12B1 N8MPL075F16B1 N8MPL100F[...]

Manufacturers Number (Mfr No -See RatingPlate) ALL Models (N8MPN) Specifications N8MPN N8MPN N8MPN N8MPN N8MPN N8MPN N8MPN N8MPN 050B12 075B12 075F16 100F14 100F20 100J22 125J20 125J22 General Input (Btuh) 50,000 75,000 75,000 100,000 100,000 100,000 125,000 125,000 Output (Btuh) 40,000 60,000 60,000 80,000 80,000 80,000 100,000 100,000 Temp. Rise [...]

Manufacturers Number (Mfr No -See RatingPlate) ALL Models (N8MPL) Specifications N8MPL N8MPL N8MPL N8MPL N8MPL N8MPL N8MPL O5OB12 O75B12 O75F16 1OOF20 1OOJ22 125J20 125J22 General Input (Btuh) 50,000 75,000 75,000 100,000 100,000 125,000 125,000 Output (Btuh) 40,000 60,000 60,000 80,000 80,000 100,000 100,000 Temp. Rise (F) 35-65 35-65 25-55 35-65 [...]

Manufacturers Number (Mfr No -See RatingPlate) ALL Models (*8MPN) Specifications *8MPN *8MPN *8MPN *8MPN *8MPN *8MPN *8MPN *8MPN 050B12 075B12 075F16 100F14 100F20 100J20 125J20 150J20 General Input (Btuh) 50,000 75,000 75,000 100,000 100,000 100,000 125,000 150,000 Output (Btuh) 40,000 60,000 60,000 81,000 81,000 81,000 101,000 121,000 Temp. Rise [...]

Manufacturers Number (Mfr No -See RatingPlate) ALL Models (*8MPL) Specifications *8MPL *8MPL *8MPL *8MPL *8MPL *8MPL 050B12 075B12 075F16 100F20 100J20 125J20 General Input (Btuh) 50,000 75,000 75,000 100,000 100,000 125,000 Output (Btuh) 40,000 60,000 60,000 81,000 81,000 101,000 Temp. Rise (F) 35-65 30-60 30-60 35-65 35-65 35-65 Electrical (Volts[...]

15. Circulation Air Blower Data (CFM) 1 N8MPN/L050B12 & *8MPN/L050B12 (1) • Denotes Brand 1N8MPN/L100F20 & *8MPN/L100F20 (2)(4) • Denotes Brand Air Delivery in Cubic Feet per Minute (C,F.M.) = (Furnace Rated @0.5" WC ESP) O TAP LOW MED L MED H HIGH _ ,10 472 704 1167 1387 ,9 _o ,30 365 638 1102 1288 _ .50 290 572 1035 1194 E _ .70 [...]

Circulation Air Blower Data Continued • N8MPN/L125J22 (2)(6) Air Delivery in Cubic Feet per Minute (C.F.M.) = (Furnace Rated @0.5" WC ESP) O TAP LOW MED L MED H HIGH _ ,10 1901 2121 2362 2463 ,£ _o ,30 1833 2033 2244 2385 ,50 1745 1936 2100 2217 E _ .70 1624 1773 1894 2033 .90 1442 1569 1714 1821 1.00 1329 1455 1583 1685 _ISMPN150J20 (2)(7)[...]

+ + WARNING: ELECTRICAL SHOCK HAZARD It' CONNECTION DIAGRAM DISCONNECT BEFORE SERVICING LADDER DIAGRAM zoo _. m _OO ROLLOUT SWITCH +TO2 > +4 0 0 TO 115VAC FIELD DISCONNECT INSERIES DEPENDING LP PRESSURE . . COPPER CONDUCTORS C) rr ONMODEL MAIN LIMIT BVSS SWTCH CAPACITOR ONLY J[ HOT NOTE #2 • */_7 EQUIPMENT GROUND Oo O _i R __R 2 (WHEN USE[...]

Parts for N8MPN/L 16 17 u AA S 2 H 6 F E 3 4 25-25-09 441 01 2613 02 [_[...]

[ Replacement Parts - N8MPN (Natural Gas) I Models - N8MPNO50B12B1, NSMPNO75B12B1, N8MPNO75F16B1, NSMPN100F14B1, N8MPNIOOF2OB1, N8MPNlOOJ22B1, NSMPN125J20B1, NSMPN125J22B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. NSMPN Key Description Part I I No. Functional Parts Number 050B 075B 075F [...]

[ Replacement Parts - N8MPN (Natural Gas) Models - N8MPN050B12B1, NSMPN075B12B1, N8MPN075F16B1, NSMPN100F14B1, N8MPN100F20B1, N8MPN100J22B1, N8MPN125J20B1, NSMPN125J22B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. N8MPN Key Description Part I I I No. Non- Functional Parts Number 050B 075B [...]

[ Replacement Parts - N8MPN (Natural Gas) Models - N8MPNO50B12B1, NSMPNO75B12B1, N8MPNO75F16B1, NSMPN100F14B1, N8MPNIOOF2OB1, N8MPNlOOJ22B1, N8MPN125J20B1, NSMPN125J22B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. N8MPN Key Description Part I I I No. Non- Functional Parts Number 050B 075B [...]

[ Replacement Parts - N8MPL (Natural Gas) I Models - N8MPLO50B12B1, N8MPLO75B12B1, N8MPLO75F16B1, N8MPLIOOF2OB1, N8MPL100J22B1, NSMPL125J20B1, N8MPL125J22B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. Key Description Part N8MPL No. Functional Number 075F16B1 100F20B1 100J22B1 125J20B1 125J[...]

[ Replacement Parts - N8MPL (Natural Gas) I Models - N8MPLO50B12B1, NSMPLO75B12B1, N8MPLO75F16B1, NSMPLIOOF2OB1, N8MPLIOOJ2OB1, N8MPL100J22B1, N8MPL125J20B1, NSMPL125J22B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. Key Part No. Number 075B lOOJ 125J 125J 12B1 22B1 20B1 22B1 A 1 Descriptio[...]

[ Replacement Parts - N8MPL (Natural Gas) I Models - N8MPLO50B12B1, NSMPLO75B12B1, N8MPLO75F16B1, NSMPLIOOF2OB1, N8MPLIOOJ2OB1, N8MPL100J22B1, N8MPL125J20B1, NSMPL125J22B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. NSMPL Key Description Part I I No. Functional Number 075B 075F IOOF lOOJ 1[...]

Parts for *8MPN/L 18 BB x 17 Z 16 U 11 15 AA T 16 CC 1 G F E 25-25-09a 441 01 2613 02[...]

I Replacement Parts - *8MPN (Natural Gas) Models - *SMPNO50B12B1, *SMPNO75B12B1, *8MPNO75F16B1, *SMPN100F14B1, *SMPNIOOF2OB1, *8MPNIOOJ2OB1, *SMPN125J20B1, *8MPN150J20B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. Key Description No, Functional Heat Exchanger 2 Switch, Pressure 3 Wheel, Bl[...]

I Replacement Parts - *8MPN (Natural Gas) Models - *8MPNO50B12B1, *8MPNO75B12B1, *8MPNO75F16B1, *8MPN100F14B1, *8MPNIOOF2OB1, *8MPNIOOJ2OB1, *8MPN125J20B1, *8MPN150J2OB1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. Key Description No, Functional Panel, Top B Box, Junction C Cover, Junction [...]

| I Replacement Parts - *8MPN (Natural Gas) Models - *SMPN050B12B1, *SMPN075B12B1, *8MPN075F16B1, *SMPN100F14B1, *SMPN100F20B1, *8MPN100J20B1, *SMPN125J20B1, *8MPN150J20B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. Key Description Part No, Functional Number 075B 075F 100J "125J 150J [...]

I Replacement Parts - *8MPL (Natural Gas) I Models - *8MPLO5OB12B1, *8MPLO75B12B1, *8MPLO75F16B1, *SMPLIOOF2OB1, *8MPLIOOJ 20B1, *8MPL125J20B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. *8MPL Key Description Part No. Functional Number 050B 075B 075F IOOF lOOJ 125J 12B1 12B1 16B1 20B1 20B1[...]

I Replacement Parts - *8MPL (Natural Gas) 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 Cove[...]

| I Replacement Parts - 8MPL (Natural Gas) I Models - '8MPLO5OB12B1, '8MPLO75B12B1, "8MPLO75F16B1, "SMPLIOOF2OB1, '8MPLIOOJ 20B1, "8MPL125J20B1 Replacement part supplied will be current active part. For parts not listed, consult place of purchase. *8MPL Key Description Part No. Functional Number 050B _075B 100F lOOJ 12[...]