Instruction/ maintenance manual of the product N8MPN050B12B1 Sears
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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.
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.
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.
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.
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.
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.
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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).
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.
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 .
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.
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.
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.
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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 - Downf.
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.
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.
MANIFOLD PRESSUREAND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS NATURAL GAS MANIFOLD PRESSURE (" w.c.) ..........................................
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--..,.,.
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.
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.
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.
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.
II I I ® I Save This Manual For Future Reference N8MPN050B12B1 N8MPN075B12B1 N8MPN075F16B1 N8MPN100F14B1 N8MPN100F20B1 N8MPN100J22B1 N8MPN125J20B1 N8MPN125J22B1 *8MPN050B12B1 *8MPN075B12B1 *8MPN075F1.
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.
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.
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.
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.
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 _ .
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 _ .
+ + 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 .
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.
[ 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.
[ 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.
[ 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.
[ 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.
[ 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.
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.
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.
| 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.
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.
I Replacement Parts - *8MPL (Natural Gas) I Models - *8MPL050B12B1, *8MPL075B12B1, *8MPL075F16B1, *SMPL100F20B1, *8MPL100J 20B1, *8MPL125J20B1 Replacement part supplied will be current active part.
| 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.
An important point after buying a device Sears N8MPN050B12B1 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Sears N8MPN050B12B1 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Sears N8MPN050B12B1 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Sears N8MPN050B12B1 you will learn all the available features of the product, as well as information on its operation. The information that you get Sears N8MPN050B12B1 will certainly help you make a decision on the purchase.
If you already are a holder of Sears N8MPN050B12B1, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Sears N8MPN050B12B1.
However, one of the most important roles played by the user manual is to help in solving problems with Sears N8MPN050B12B1. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Sears N8MPN050B12B1 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
