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PARTS MANUALGas FurnaceN8MSN, N8MSLSafety Labeling and Signal WordsDANGER, WARNING, CAUTION, andNOTEThe signal words DANGER, WARNING,CAUTION, and NOTE are used to identify levels ofhazard seriousness. The signal word DANGER isonly used on product labels to signify an immediatehazard. The signal words WARNING, CAUTION,and NOTE will be used on product labels andthroughout this manual and other manuals that mayapply to the product.Signal Words in ManualsThe signal word WARNING is used throughout thismanual in the following manner:!WARNINGWARNINGThe signal word CAUTION is used throughout thismanual in the following manner:!CAUTIONDANGER Immediate hazards which will result insevere personal injury or death.Signal Words on Product LabelingWARNING Hazards or unsafe practices whichcould result in severe personal injury or death.Signal words are used in combination with colorsand/or pictures on product labels.CAUTION Hazards or unsafe practices whichmay result in minor personal injury or product orproperty damage.NOTE Used to highlight suggestions which willresult in enhanced installation, reliability, oroperation.TABLE OF CONTENTSMODEL NUMBER IDENTIFICATION GUIDE . . . . . . . . 2!WARNINGPARTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ELECTRICAL SHOCK HAZARDPARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Failure to turn off electric power could result inpersonal injury or death.MODELSN8MSN0451408A1 . . . . . . . . . . . . . . N8MSL0451408A1N8MSN0451412A1 . . . . . . . . . . . . . . N8MSL0451412A1N8MSN0701408A1 . . . . . . . . . . . . . . N8MSL0701408A1N8MSN0701412A1 . . . . . . . . . . . . . . N8MSL0701412A1N8MSN0701716A1 . . . . . . . . . . . . . . N8MSL0701716A1N8MSN0901714A1 . . . . . . . . . . . . . . N8MSL0901714A1N8MSN0902116A1 . . . . . . . . . . . . . . N8MSL0902116A1N8MSN0902120A1 . . . . . . . . . . . . . . N8MSL0902120A1N8MSN1101712A1 . . . . . . . . . . . . . . N8MSL1101712A1N8MSN1102116A1 . . . . . . . . . . . . . . N8MSL1102116A1N8MSN1102122A1 . . . . . . . . . . . . . . N8MSL1102122A1Before installing or servicing system, turn offmain power to the system. There may be more thanone disconnect switch, including �ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁUse of the AHRI Certified TM Mark indicatesa manufacturer’s participation in the program.For verification of certification for individualproducts, go to www.ahridirectory.org .N8MSN1352116A1 . . . . . . . . . . . . . . N8MSL1352116A1N8MSN1352422A1 . . . . . . . . . . . . . . N8MSL1352422A1N8MSN1552420A1 . . . . . . . . . . . . . . N8MSL1552420A1441 03 1402 00 Nov. 2012
PARTS MANUALGas Furnace: N8MSN, N8MSLMODEL NUMBER IDENTIFICATION GUIDEDIGIT POSITION123456,7,89,1011,121314N8MSL0451412A1N Entry8 80% AFUEEFFICIENCYM MultipositionV Variable Speed Blower Motor ECMX ECM Blower MotorS Single stageT Two stageN StandardL Low NOx045 44,000 BTU/hr070 66,000 BTU/hr090 88,000 BTU/hr110 110,000 BTU/hr135 132,000 BTU/hr155 154,000 BTU/hr14 14 3/16”17 17 1/2”21 21”24 24 1/2”08 800 CFM12 1200 CFM14 1400 CFM16 1600 CFM20 2000 CFM22 2200 CFMPOSITIONTYPEFEATUREHEAT INPUTCABINET WIDTHNOMINAL MAXIMUM COOLING AIRFLOW @ .5 IN. W.C.SALES (MAJOR) REVISION DIGITENGINEERING (MINOR) REVISION DIGITECM-Electronically Commutated MotorACCESSORIES PART NUMBER IDENTIFICATION GUIDEDIGIT POSITIONN Non BrandedA AccessoryH Heating12345, 6, 78, 910, 11NAHA00101DHBRANDINGPRODUCT GROUPKIT USAGEA OriginalB 2nd GenerationMAJOR SERIESProduct Identifier NumberPackage QuantityType of Kit (Example: DH Draft Hood Chimney Adapter)2441 03 1402 00
PARTS MANUALGas Furnace: N8MSN, N8MSLPARTS DIAGRAMNOTE: This illustration is forreference only. Your unit maydiffer in appearance or may notinclude all components shown.A2BBAACC1M9X1817ZL27 2821DDD20BEGCLLNK837VV6EEHHJH5FF19441 03 1402 003
PARTS MANUALGas Furnace: N8MSN, N8MSLPARTS DIAGRAMNOTE: This illustration is forreference only. Your unit maydiffer in appearance or may notinclude all components shown.PP24NN2923MM15RR SSP25112214GGT1616TT10124441 03 1402 00
PARTS MANUALGas Furnace: N8MSN, N,L)1352422A1N8MS(N,L)1552420A1HEAT EXCHANGER ASYSWITCH VENT PRESSURESWITCH PRESSUREWHEEL BLOWER DD10 X 6 X 1/2 CW CVWHEEL BLOWER DD10 X 8 X 1/2 CW CCWHEEL BLOWER DD10 X 10 X 1/2 CW CCWHEEL BLOWER DD11 X 11 X 1/2 CW CCWHEEL BLOWER DD11 X 8 X 1/2 CW CVMTR BLR 1/115 1/5 HP 1075/3MTR BLR 1/115 1/3 HP 1075/3MTR BLR 1/115 1/2 HP 1075/3MTR BLR 1/115 3/4 HP 1075/3CAP RN OV 370V 7.5CAP RN OV 370V 10CAP RN OV 370V 15TRANSFORMER 40VA 120 24VBOARD CIRCUITSWITCH DOORBURNER ASYBURNER ASYBURNER ASYBURNER ASYBURNER ASYBURNER ASYSENSOR FLAMEIGNITORORIFICEVALVE GASSWITCH LIMIT 350 FSWITCH LIMIT AUTO RESETSWITCH LIMIT 165 FSWITCH LIMIT 180 FSWITCH LIMIT 220 FSWITCH LIMIT 235 FSWITCH LIMIT 240 FSWITCH LIMIT 190 FSWITCH LIMIT 160 FSWITCH LIMIT 185 FINDUCER MOTOR ASYINDUCER MOTOR ASYINDUCER MOTOR ASYSWITCH LIMIT AUTO RESET 200 FELBOW VENT ASYSWITCH LIMIT 210 FINDUCER FANWHEEL INDUCER 4.5 X 1.5SHAFT SEALCLIPDOOR LATCHKNOBINDUCER MTR 1/115 2 SPDINDUCER MTR 1/115 8.1 3000INDUCER MTR 1/115 16 3000INDUCER MTR 1/115 30 3000TOP PLATETOP PLATETOP PLATEFAST A1N8MS(N,L)0701412A1KEYNO.N8MS(N,L)0451408A1N8MSN, N8MSL PARTS 41621 1 1 1 1111 11212 1 1 11 111122 1 1 21 1 1 1 1111 11212 1 1 11 111122 1 1 31 1 1 1111 1 11312 1 1 11 111122 1 1 41 1 1 1 111 1 11412 1 1 11 111122 1 161 1 1 1 111 1 11612 1 111 111122 1 161 1 1 1 111 1 11612 1 111 111122 1 31 1 1 1 111 1 11312 1 1 11 111122 1 1 31 1 1 1 111 1 11312 1 1 11 111122 1 1 41 1 1 1 111 1 11412 1 1 11 111122 1 1 4 1 1 1 1 111 1 11412 1 1 11 1111221 15 1 1 1 1 111 1 11512 1 111 111122 1 1 5 1 1 1 111 1 115121 111 111122 1 151 1 1 1 111 1 11512 1 1111111122 1 17 1 1 1 1 111 111712 1 111 111122 1 continued on next page 441 03 1402 005
PARTS MANUALGas Furnace: N8MSN, N8MSL 1 11 11 1 21 111 1 1 1 1 1 1 1 4 1 11 1 1 1 1 1 1 1 1 31 111 1 1 1 1 1 1 1 31 111 1 1 1 1 1 1 1 3 1 11 11 1 1 1 1 1 1 4 1 11 1 1 1 1 1 1 1 1 4 111 1 1 11 1 1 1 1 5 1 11 1 1 1 1 1 1 1 1 5 111 1 1N8MS(N,L)1352116A1 1 11 11 1 21 111 22A1TOP PLATECELL PANELCELL PANELCELL PANELCELL PANELCELL PANELCELL PANELCELL PANELCELL PANELCELL PANELCELL PANELCELL PANELBOX AUX JGASKET OUTLET 2 CELLGASKET OUTLET 3 CELLGASKET OUTLET 4 CELLGASKET OUTLET 5 CELLGASKET OUTLET 6 CELLGASKET OUTLET 3 CELLGASKET OUTLET 4 CELLGASKET OUTLET 7 CELLCOVER BOX AUX JGASKET INLET 2 CELLGASKET INLET 3 CELLGASKET INLET 4 CELLGASKET INLET 5 CELLGASKET INLET 6 CELLGASKET INLET 7 CELLSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERSHELF ASY BLOWERRADIATOR FLAME N8MSL (LOW NOx ONLY)HOUSING ASY BLOWERHOUSING ASY BLOWERHOUSING ASY BLOWERHOUSING ASY BLOWERHOUSING ASY BLOWERBOX SAFE GUARDCOVER SAFE GUARD BOXCUTOFF BLOWERCUTOFF BLOWERCUTOFF BLOWERCUTOFF BLOWERCUTOFF BLOWERCUTOFF BLOWERCLIP HARNESS RETAINERFAST 8MS(N,L)0902116A1KEYNO.N8MS(N,L)0451408A1N8MSN, N8MSL PARTS LIST (continued) 1 1 1 1 1 1 5 1 11 1 1 1 1 1 1 1 1 6 111 1 11 1 1 1 1 1 1 6 1 11 1 11 1 1 11 1 17 1 11 1 1 continued on next page 6441 03 1402 00
PARTS MANUALGas Furnace: N8MSN, N8MSL441 03 1402 2422A1N8MS(N,L)1552420A1HSTRAP CAPACITOR OVALHHCLIP HARNESS RETAINERJBRACKET BLOWER MTGJBRACKET CONTROL MTGJBRACKET BLOWER MTGJBRACKET BLOWER MTGKHARNESS ASY 80% 1 STGLBLOWER DOOR ASYLBLOWER DOOR ASYLBLOWER DOOR ASYLBLOWER DOOR ASYLLSIGHTGLASSMBRACKET DOOR SWITCHMMINDUCER MOTOR SHIELDNOUTER DOOR ASYNOUTER DOOR ASYNOUTER DOOR ASYNOUTER DOOR ASYNNINDUCER MOTOR LDPMANIFOLDPPINDUCER MOTOR SUPPORTRRSCREWSSGROMMETTSUPPORT ASY BURNERTSUPPORT ASY BURNERTSUPPORT ASY BURNERTSUPPORT ASY BURNERTSUPPORT ASY BURNERTSUPPORT ASY BURNERTTBRACKET IGNITERVVSCREWXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYXINDUCER HOUSING ASYZGASKET INDUCER MOTORPARTS NOT SHOWN)(NAHA00801LP GAS CONV NAT LP)(NAHA00801NG GAS CONV LP NAT)(KIT GASKET BLW DOOR LEAKAGEFAST 408A1N8MSN, N8MSL PARTS LIST 4052117691311 1 11 1111 11 1331 13 1 111 1 11 1111 11 1331 131 111 1 11 1111 1 1 133 1 13 1 111 1 11 1111 1 1 133 1 13 1 111 1 1 1 111 1 1 1 133 1 13 1 111 1 1 1 111 1 1 1 133 1 13 1 111 1 1 1 111 1 1 1 133 1 14 1 111 1 1 1 111 1 1 1 133 1 13 1 111 11 1 111 1 1 1 133 1 14 1 111 1 1 1 111 1 1 1 133 1 14 1 111 1 1 1 111 1 1 1 133 1 13 1 111 1 1 1 111 1 1 1 133 1 13 1 111 1 1 1111 11 1 133 1 13 1 1111 1 1111 11 1133 114 111111111111111International Comfort Products, LLCLewisburg, Tennessee 37091 USA7
441 03 1402 00 Nov. 2012 PARTS MANUAL Gas Furnace N8MSN, N8MSL DANGER, WARNING, CAUTION, and NOTE The signal words DANGER, WARNING, CAUTION, and NOTE are used to identify levels of hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate
