Cooling Capacity Dimensions H x W x D CFM range Inches in. w.c. (125 Pa)

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1 80% Single Stage Heating Furnace EASIER TO SELL 80% AFUE Flame roll out senss standard Categy I venting Blocked vent switch Louvered do 24 VAC and 115 VAC humidifier terminal Electronic air cleaner terminal Twinning furnaces of same heating and cooling sizes with approved kit N8MSL Califnia NOx approved Certified to leak 2 percent less of nominal air conditioning CFM delivered when pressurized to 1-inch Water Gauge with all present air inlets, air outlets, and condensate drain pt(s) sealed TOUGHER PSC blower mot Adjustable heating blower OFF delay Facty set blower ON delay RPJ aluminized steel heat exchanger temperature limit control prevents overheating Direct ignition with Silicon Nitride ignit One piece prepainted steel cabinet QUIETER In shot burners EASIER TO INSTALL AND SERVICE 33 1/3 (847mm) high, f ease of installation Innovative knobs f easy do removal and secure attachment Facty shipped f natural gas, with propane gas conversion kits available Four position upflow/downflow/hizontal (left/right) installation Three position inducer elbow capability Through the casing flue pipe f counterflow applications Common venting with other Categy I appliances Masonry chimney adapter available Self diagnostics Slide out blower assembly WARRANTY * 20 year heat exchanger limited warranty Illustrations and photographs are only representative. Some product models may vary.! WARNING This furnace is not designed f use in mobile homes, trailers, recreational vehicles. Such use could result in property damage and/ death. Use of the AHRI Certified TM Mark indicates a manufacturer s participation in the program. F verification of certification f individual products, go to 5 year parts limited warranty With timely registration, an additional 5 year parts limited warranty * Applies to iginal purchaser/homeowner, some limitations may apply. See warranty certificate f complete details. Model Size Cooling Capacity Input Efficiency Dimensions H x W x D CFM range (MBTUH) AFUE Inches in. w.c. (125 Pa) N8MSN N8MSL N8MSN, N8MSL PS 80 Product Specifications Shipping Wt. Lbs(Kg) A 44,000 80% /3 x 14-3/16 x 29 (847 x 360 x 737) 107 (49) A 44,000 80% /3 x 14-3/16 x 29 (847 x 360 x 737) 107 (49) A 66,000 80% /3 x 14-3/16 x 29 (847 x 360 x 737) 111 (50) A 66,000 80% /3 x 14-3/16 x 29 (847 x 360 x 737) 115 (52) A 66,000 80% /3 x 17-1/2 x 29 (847 x 445 x 737) 126 (57) B 88,000 80% /3 x 17-1/2 x 29 (847 x 445 x 737) 127 (58) A 88,000 80% /3 x 21 x 29 (847 x 533 x 737) 140 (64) A 88,000 80% /3 x 21 x 29 (847 x 533 x 737) 146 (66) A 110,000 80% /3 x 17-1/2 x 29 (847 x 445 x 737) 135 (61) A 110,000 80% /3 x 21 x 29 (847 x 533 x 737) 146 (66) A 110,000 80% /3 x 21 x 29 (847 x 533 x 737) 152 (69) A 132,000 80% /3 x 21 x 29 (847 x 533 x 737) 149 (68) A 132,000 80% /3 x 24-1/2 x 29 (847 x 622 x 737) 163 (74) A 154,000 80% /3 x 24-1/2 x 29 (847 x 622 x 737) 170 (77) Specifications are subject to change without notice. June 2012

2 MODEL NUMBER IDENTIFICATION GUIDE DIGIT POSITION ,7,8 9,10 11, N 8 M S L A 1 N = Entry 8 = 80% AFUE EFFICIENCY M = Multiposition POSITION V = Variable Speed Blower Mot ECM X = ECM Blower Mot S = Single stage T = Two stage TYPE N = Standard L = NOx FEATURE 045 = 44,000 BTU/hr 070 = 66,000 BTU/hr 090 = 88,000 BTU/hr 110 = 110,000 BTU/hr 135 = 132,000 BTU/hr 155 = 154,000 BTU/hr HEAT INPUT 14 = 14 3/16 17 = 17 1/2 21 = = 24 1/2 CABINET WIDTH 08 = 800 CFM 12 = 1200 CFM 14 = 1400 CFM 16 = CFM 20 = 2000 CFM 22 = 2200 CFM NOMINAL MAXIMUM COOLING IN. W.C. SALES (MAJOR) REVISION DIGIT ENGINEERING (MINOR) REVISION DIGIT ECM-Electronically Commutated Mot ACCESSORIES PART NUMBER IDENTIFICATION GUIDE DIGIT POSITION , 6, 7 8, 9 10, 11 N A H A DH N = Non Branded BRANDING A = Accessy H = Heating A = Original B = 2nd Generation Product Identifier Number Package Quantity Type of Kit (Example: DH = Draft Hood Chimney Adapter) PRODUCT GROUP KIT USAGE MAJOR SERIES 2 Specifications subject to change without notice.

3 PHYSICAL DATA NATURAL GAS A A A A A B A OUTPUT CAPACITY BTUH* (Nonweatherized ICS) INPUT BTUH* N8MSL Upflow; All N8MSN N8MSL Downflow/ Hizontal N8MSL Upflow; All N8MSN N8MSL Downflow/ Hizontal 35,000 36,000 53,000 54,000 53,000 71,000 71,000 34,000 34,000 51,000 51,000 51,000 68,000 68,000 44,000 44,000 66,000 66,000 66,000 88,000 88,000 42,000 42,000 63,000 63,000 63,000 84,000 84,000 AFUE%* Nonweatherized ICS TRANSFORMER (24 volt) 40 VA CERTIFIED TEMP RISE RANGE F ( C) (17 33) (11 28) (22 39) (17 33) (14 30) (22 39) (17 33) CERTIFIED EXT Heating STATIC PRESSURE Cooling AIRFLOW CFM Heating Cooling LIMIT CONTROL SPST HEATING BLOWER CONTROL Solid-State Time Operation BURNERS (Monopt) GAS CONNECTION SIZE 1/2 inch NPT GAS VALVE (Redundant) Manufacturer White-Rodgers Minimum Inlet Pressure (in. w.c.) 4.5 (Natural Gas) Maximum Inlet Pressure (in. w.c.) 13.6 (Natural Gas) IGNITION DEVICE Hot Surface COOLING CAPACITY CFM range (.5 in. w.c.) NATURAL GAS A A A A A A A OUTPUT CAPACITY BTUH* (Nonweatherized ICS) INPUT BTUH* N8MSL Upflow; All N8MSN N8MSL Downflow/ Hizontal N8MSL Upflow; All N8MSN N8MSL Downflow/ Hizontal 71,000 89,000 89,000 89, , , ,000 68,000 85,000 85,000 85, , , ,000 88, , , , , , ,000 84, , , , , , ,000 AFUE%* Nonweatherized ICS TRANSFORMER (24 volt) 40 VA CERTIFIED TEMP RISE RANGE F ( C) (14 30) (28 44) (22 39) (17 33) (28 44) (22 39) (25 41) CERTIFIED EXT Heating STATIC PRESSURE Cooling AIRFLOW CFM Heating Cooling LIMIT CONTROL SPST HEATING BLOWER CONTROL Solid-State Time Operation BURNERS (Monopt) GAS CONNECTION SIZE 1/2 inch NPT GAS VALVE (Redundant) Manufacturer White-Rodgers Minimum Inlet Pressure (in. w.c.) 4.5 (Natural Gas) Maximum Inlet Pressure (in. w.c.) 13.6 (Natural Gas) IGNITION DEVICE Hot Surface COOLING CAPACITY CFM range (.5 in. w.c.) * Gas input ratings are certified f elevations to 2000 ft. (610 M). In USA, f elevations above 2000 ft. (610 M), reduce ratings 4 percent f each 1000 ft. (305 M) above sea level. Refer to National Fuel Gas Code NFPA 54/ANSI Z Table F.4 furnace Installation Instructions. Capacity in accdance with U.S. Government DOE test procedures. Airflow shown is f bottom only return-air supply in comft mode (as shipped). F air delivery above CFM, see Air Delivery Table f other options. A filter is required f each return air supply. ICS Isolated Combustion System Specifications subject to change without notice. 3

4 FURNACE SIZE VOLTS HERTZ PHASE OPERATING VOLTAGE RANGE Maximum* Minimum* ELECTRICAL DATA MAXIMUM UNIT AMPS UNIT AMPACITY# MAXIMUM WIRE LENGTH FT. (M) MAXIMUM FUSE OR CKT BKR AMPS MINIMUM WIRE GAUGE A (15) A (12) A (16) A (12) A (9) B (10) A (9) A (9) A (10) A (9) A (8) A (8) A (9) A (9) * Permissible limits of the voltage range at which the unit operates satisfactily. # Unit ampacity = 125 percent of largest operating component's full load amps plus 100 percent of all other potential operating components' (EAC, humidifier, etc.) full load amps. Time-delay type is recommended. Length shown is as measured 1 way along wire path between unit and service panel f maximum 2 percent voltage drop. FURNACE SIZE DIMENSIONS A B C D TOP AND OUTLET BOTTOM WIDTH FLUE COLLAR IN (mm) IN (mm) CABINET WIDTH IN (mm) BOTTOM WIDTH IN (mm) VENT CONNECTION SIZE IN (mm) SHIP WT LB (KG) /16 (360) 12 9/16 (319) 9 5/16 (237) 12 11/16 (322) 4 (102) 104 (47) /16 (360) 12 9/16 (319) 9 5/16 (237) 12 11/16 (322) 4 (102) 107 (49) /16 (360) 12 9/16 (319) 9 5/16 (237) 12 11/16 (322) 4 (102) 111 (50) /16 (360) 12 9/16 (319) 9 5/16 (237) 12 11/16 (322) 4 (102) 115 (52) /2 (445) 15 (403) 11 9/16 (294) 16 1/8 (406) 4 (102) 126 (57) /2 (445) 15 (403) 11 9/16 (294) 16 1/8 (406) 4 (102) 127 (58) (533) 19 3/8 (492) 13 5/16 (338) 19 1/2 (495) 4 (102) 140 (64) (533) 19 3/8 (492) 13 5/16 (338) 19 1/2 (495) 4 (102) 146 (66) /2 (445) 15 (403) 11 9/16 (294) 16 1/8 (406) 4 (102) 135 (61) (533) 19 3/8 (492) 13 5/16 (338) 19 1/2 (495) 4 (102) 146 (66) (533) 19 3/8 (492) 13 5/16 (338) 19 1/2 (495) 4 (102) 152 (69) (533) 19 3/8 (492) 13 5/16 (338) 19 1/2 (495) 4 (102)* 149 (68) /2 (622) 22 (581) 15 1/16 (383) 23 (584) 4 (102)* 163 (74) /2 (622) 22 (581) 15 1/16 (383) 23 (584) 4 (102)* 170 (77) * 135 Btu/h and 155 Btu/h size furnaces require a 5 6-in. ( mm) vent. Use a vent adapter between furnace and vent stack. See Installation Instructions f complete installation requirements. 4 Specifications subject to change without notice.

5 SC A LE 3:1 6 UNIT DIMENSIONS 9 [250.7] 27 3/4 [704.7] 33 1/4 [843.9] 8 7/16 [213.5] 5 15/16 [150.7] 5 1/2 [140.3] 26 1/8 [663.6] SECTION Z-Z TOP VIEW 1 15/16 [49.2] AIR FLOW ACCESSORY 1/2 [12.7] THERMOSTAT WIRE ENTRY ACCESSORY 21 5/8 [549.5] BOTTOM INLET 28 3/8 [721.2] 29 [736.9] 5 1/8 [130.5] 6 1/8 [155.7] C 2 1/16 [51.6] 1 11/16 [43.5] C ACCESSORY (2) 3 7/16 [86.8] 5 [148.5] JUNCTION BOX LOCATION 1 3/4 [44.5] GAS ENTRY 2 5/16 [59] NOTES: 1. Dos may vary by model. 2. Two additional -in. (22 mm) diameter holes are located in the top plate. 3. Minimum return-air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer's recommendations f equivalent diameters. a. F 800 CFM-16-in. (406 mm) round 14 1/2 x 12-in. (368 x 305 mm) rectangle. b. F 1200 CFM-20-in. (508 mm) round 14 1/2 x 19 1/2-in. (368 x 495 mm) rectangle. c. F CFM-22-in. (559 mm) round 14 1/2 x 22 1/16-in. (368 x 560mm) rectangle. d. Return air above CFM may require one of the following configurations: 2 sides, 1 side and a bottom bottom only f return air. See Air Delivery table in this document f specific use to allow f sufficient airflow to the furnace. AIR FLOW 19 [481.7] OUTLET 22 15/16 [582.6] 22 3/4 [577.8] 22 9/16 [573.1] 21 5/8 [549.3] 19 3/4 [501.6] A B 9 9/16 [243.3] 4 13/16 [122.2] 1/2 [12.7] THERMOSTAT WIRE ENTRY 1 3/4 [44.5] GAS ENTRY 7 13/16 [197.8] 9 11/16 [245.4] 11 7/16 [290.7] 29 9/16 [750.7] 27 3/4 [704.7] ALTERNATE JUNCTION BOX LOCATION ACCESSORY Z ACCESSORY Z 14 [337.3] (BOTH SIDES) D BOTTOM RETURN WIDTH NOTE: ALL DIMENSIONS IN INCH [MM] 3/4 [19.1] KNOCK OUTS FOR VENTING (5 PLACES) 22 1/16 [560] SIDE INLET (BOTH SIDES) 26 1/16 [662.0] 26 7/16 [671.5] 1 [25.4] 1 1/4 [31.8] SD Specifications subject to change without notice. 5

6 DOWNFLOW VENT CONFIGURATIONS SEE NOTES: 1,2,4,5,7,8,9 DOWNFLOW CONTINUTED A02061 SEE NOTES: 1,2,4,5,6,7,8,9 A02062 SEE NOTES: 1,2,3,4,5,7,8,9 A02063 UPFLOW VENT CONFIGURATIONS SEE NOTES:1,2,3,4,5,7,8,9 A02060 SEE NOTES: 1,2,4,7,8,9 A02058 SEE NOTES: 1,2,3,4,7,8,9 A02059 HORIZONTAL RIGHT VENT CONFIGURATIONS SEE NOTES: 1,2,4,5,7,8,9 A02070 HORIZONTAL LEFT VENT CONFIGURATIONS SEE NOTES: 1,2,4,5,7,8,9 A02068 SEE NOTES: 1,2,4,7,8,9 A02069 SEE NOTES: 1,2,4,7,8,9 A02064 HORIZONTAL LEFT VENT CONFIGURATIONS SEE NOTES: 1,2,4,5,7,8,9 A02065 SEE NOTES: 1,2,4,5,7,8,9 A02066 SEE NOTES: 1,2,4,5,7,8,9 A Specifications subject to change without notice.

7 Venting Notes 1. F common vent, vent connect sizing and vent material, use the NFGC. 2. Immediately increase to 5 inch (127 mm) 6 inch (152 mm) vent connect outside furnace casing when 5 inch (127 mm) vent connect is required, refer to Note 1 above. 3. Side outlet vent f upflow and downflow installations must use Type B vent immediately after exiting the furnace, except when the Downflow Vent Guard Kit, is used in the downflow position 4. Type B vent where required, refer to the Note 1 above. 5. A 4 inch (102 mm) single wall (26 ga. minimum) vent must be used inside furnace casing and when the Downflow Vent Guard Kit is used external to the furnace. 6. Accessy Downflow Vent Guard Kit is required in downflow installations with lower vent configuration. 7. Chimney Adapter Kit may be required f exteri masonry chimney applications. Refer to Chimney Adapter Kit f sizing and complete application details. 8. Secure vent connect to furnace elbow with (2) crosion resistant sheet metal screws, spaced approximately 180 apart. 9. Secure all other single wall vent connect joints with (3) crosion resistant screws spaced approximately 120 apart. Secure Type B vent connects per vent connect manufacturer s recommendations. MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS FOR ALL UNITS This fced air furnace is equipped f use with natural gas at altitudes 0 10,000 ft (0 3,050m). An accessy kit, supplied by the manufacturer, shall be used to convert to propane gas use may be required f some natural gas applications. This furnace is f indo installation in a building constructed on site. The furnace may be installed on combustible floing in alcove closet at minimum clearance as indicated by the diagram from combustible material. This furnace may be used with a Type B 1 Vent and may be vented in common with other gas fired appliances. This furnace is approved f UPFLOW, DOWNFLOW, and HORIZONTAL installations. Downflow Positions: Installation on non combustible flos only. F Installation on combustible floing only when installed on special base coil assembly. 18 inch front clearance required f alcove. * Indicate supply return sides when furnace is in the hizontal position. Line contact only permissible between lines fmed by intersections of the Top and two Sides of the furnace jacket, and building joists, studs framing. BLOWER PERFORMANCE DATA N8MSN & N8MSL A A A A A B A DIRECT DRIVE MOTOR Hp (PSC) 1/5 1/3 1/5 1/3 1/2 1/3 1/2 MOTOR FULL LOAD AMPS RPM (Nominal) Speeds BLOWER WHEEL DIAMETER X WIDTHS in. (mm) 10 x 6 (254 x 152) 11 x 8 (279 x 203) 10 x 8 (254 x 203) 10 x 10 (254 x 254) N8MSN & N8MSL A A A A A A A DIRECT DRIVE MOTOR Hp (PSC) 3/4 1/3 1/2 3/4 1/2 3/4 3/4 MOTOR FULL LOAD AMPS RPM (Nominal) Speeds BLOWER WHEEL DIAMETER X WIDTHS in. (mm) PSC-Permanent Split Capacit 11 x 11 (279 x 279) 10 x 8 (254 x 203) 10 x 10 (254 x x 11 (279 x 279) 10 x 10 (254 x 254) 11 x 11 (279 x 279) 11 x 11 (279 x 279) Specifications subject to change without notice. 7

8 FURNACE SIZE A A A A A B A A A A A A A A RETURN AIR INLET Only Both Sides 1 Side & 1 Side Only Only, Sides 1 Side & 1 Side Only Only, Sides Side & 1 Side Only Only Both Sides 1 Side & 1 Side Only SPEED Med AIR DELIVERY CFM (with filter)* EXTERNAL STATIC PRESSURE (in. w.c.) * A filter is required f each return-air inlet. Airflow perfmance included 3/4-in. (19 mm) washable filter media such as contained in facty-authized accessy filter rack. To determine airflow perfmance without this filter, assume an additional 0.1 in. w.c. available external static pressure. -- Indicates unstable operating conditions Specifications subject to change without notice.

9 International Comft Products, LLC 9 Lewisburg, Tennessee USA ACCESSORIES PART DESCRIPTION NAHB00501FF External Filter Rack, 14 inch (14 x 25 inch washable filter included) X X X X NAHB00601FF External Filter Rack, 17 inch (16 x 25 inch washable filter included) X X NAHB00701FF External Filter Rack, 21 inch (20 x 25 inch washable filter included) X NAHA00506FB Washable filter, 1 inch 16 x 25 (6 pack) X X X X X X NAHA00706FB Washable filter, 1 inch 24 x 25 (6 pack) X NAHA00901FF External Side Return Filter Rack 1 inch 16 x 25 (16 x 25 washable filter included) X X X X X X X NAHA00601WK Twinning Kit (Upflow, Downflow and Hizontal) X X X X X X X NAHA01101SB Combustible Flo Base (Not required when evapat coil case is used f downflow) X X X X X X X NAHB00301VC Downflow Vent Guard (Not required when vent is routed through cabinet) X X X X X X X NAHA00401DH Chimney Adapter Kit 4 in. vent X X X X X X X NAHA00801LP Natural to Propane Conversion Kit * X X X X X X X NAHA00801NG Propane to Natural Conversion Kit * X X X X X X X NAHB00301WL Warning Label Kit X X X X X X X ACCESSORIES PART DESCRIPTION NAHB00601FF External Filter Rack, 17 inch (16 x 25 inch washable filter included) X NAHB00701FF External Filter Rack, 21 inch (20 x 25 inch washable filter included) X X X X NAHB00801FF External Filter Rack, 24 inch (24 x 25 inch washable filter included) X X NAHA00506FB Washable filter, 1 inch 16 x 25 (6 pack) X NAHA00706FB Washable filter, 1 inch 24 x 25 (6 pack) X X X X X X NAHA00901FF External Side Return Filter Rack 1 inch 16 x 25 (16 x 25 washable filter included) X X X X X X X NAHA00601WK Twinning Kit (Upflow, Downflow and Hizontal) X X X X X X X NAHA01101SB Combustible Flo Base (Not required when evapat coil case is used f downflow) X X X X X X X NAHB00301VC Downflow Vent Guard (Not required when vent is routed through cabinet) X X X X X X X NAHA00401DH Chimney Adapter Kit 4 in. vent X X X X NAHA00301DH Chimney Adapter Kit 5 in. vent X X X NAHA00801LP Natural to Propane Conversion Kit * X X X X X X X NAHA00801NG Propane to Natural Conversion Kit * X X X X X X X NAHB00301WL Warning Label Kit X X X X X X X X Accessy available Suitable f side return filter rack and 17 inch external bottom filter rack * Facty authized and field installed. Gas conversion kits are CSA recognized. + FAST parts number