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Kenmore N8MSL0701412A1 Installation Instructions Manual
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Contents
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FURNACE CORROSION HAZARDFailure to follow this caution may result in furnacedamage.Air for combustion must not be contaminated byhalogen compounds, which include fluoride, chloride,bromide, and iodide. These elements can corrodeheat exchangers and shorten furnace life. Aircontaminants are found in aerosol sprays,detergents, bleaches, cleaning solvents, salts, airfresheners, and other household products.CARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personalinjury or death.The operation of exhaust fans, kitchen ventilationfans, clothes dryers, attic exhaust fans or fireplacescould create a NEGATIVE PRESSURE CONDITION2. Figure 7 illustrates how to provide TWO OUTDOOROPENINGS, one inlet and one outlet combustion andventilation air opening, to the outdoors.a. One opening MUST commence within 12 in. (300mm) of the ceiling and the second opening MUSTcommence within 12 in. (300 mm) of the floor.b. Size openings and ducts per Figure 7 and Table 2.c. TWO HORIZONTAL DUCTS require 1 sq./in, of freearea per 2,000 Btuh (1,100 mm2/kW) of combinedinput for all gas appliances in the space perFigure 7 and Table 2.d. TWO OPENINGS OR VERTICAL DUCTS require 1sq./in, of free area per 4,000 Btuh (550 mm2/kW)for combined input of all gas appliances in thespace per Figure 7 and Table 2.3. ONE OUTDOOR OPENING requires:a. 1 square inch of free area per 3,000 Btuh (734mm2/kW) for combined input of all gas appliancesin the space per Table 2 andb. Not less than the sum of the areas of all vent con-nectors in the space.at the furnace. Make-up air MUST be provided for theventilation devices, in addition to that required by thefurnace. Refer to Carbon Monoxide Poisoning Hazardwarning in venting section of these instructions todetermine if an adequate amount of make-up air isavailable.The requirements for combustion and ventilation air dependupon whether or not the furnace is located in a space havinga volume of at least 50 cu/ft, per 1,000 Btuh input rating for allgas appliances installed in the space.Spaces having less than 50 cu/ft, per 1,000 Btuhrequire the OUTDOOR COMBUSTION AIRMETHOD.Spaces having at least 50 cu/ft, per 1,000 Btuh mayuse the INDOOR COMBUSTION AIR, STANDARDor KNOWN AIR INFILTRATION METHOD.Outdoor Combustion Air Method1. Provide the space with sufficient air for proper combus-tion, ventilation, and dilution of flue gases using per-manent horizontal or vertical duct(s) or opening(s) dir-ectly communicating with the outdoors or spaces thatfreely communicate with the outdoors.The opening shall commence within 12 in. (300 mm) of theceiling. Appliances in the space shall have clearances of atleast 1 in. (25 mm) from the sides and back and 6 in. (150mm) from the front. The opening shall directly communicatewith the outdoors or shall communicate through a vertical orhorizontal duct to the outdoors or spaces (crawl or attic) thatfreely communicate with the outdoors.Indoor Combustion Air NFPA & AGAStandard and Known-Air-Infiltration Rate MethodsIndoor air is permitted for combustion, ventilation, anddilution, if the Standard or Known-Air-Infiltration Methodis used.CARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in deathand/or personal injury.Many homes require air to be supplied from outdoorsfor furnace combustion, ventilation, and dilution of fluegases. The furnace combustion air supply must beprovided in accordance with this instruction manual.Table 2--Minimum Free Area Re( uired for Each Combustion Air Opening of Duct to OutdoorsTWO OPENINGS OR VERTICALDUCTS(1 SQ. IN./4,000 BTUH)(550 SQ. MM/KW)TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENINGFURNACE (1 SQ. IN./2,000 BTUH) (1 SQ. IN./3,000 BTUH)INPUT (1,100 SQ. MM/KW) (734 SQ. MM/KW)(BTUH) Free Area of Round Duct Free Area of Round Duct Free Area of Round DuctOpening and Duct Dia. Opening and Duct Dia. Opening and Duct Dia.Sq. In. (Sq. mm) In. (mm) Sq. In. (Sq. mm) In. (mm) Sq. In. (Sq. mm) In. (mm)44,000 22 (14194) 6 (152) 14.7 (9484) 5 (127) 11 (7096) 4 (102)66,000 33 (21290) 7 (178) 22.0 (14193) 6 (152) 16.5 (10645) 5 (127)88,000 44 (28387) 8 (203) 29.3 (18903) 7 (178) 22 (14193) 6 (152)110,000 55 (35484) 9 (229) 36.7 (23677) 7 (178) 27.5 (17742) 6 (152)132,000 66 (42580) 10 (254) 44.0 (28387) 8 (203) 33 (21290) 7 (178)154,000 77 (49677) 10 (254) 51.3 (33096) 9 (229) 38.5 (24839) 8 (203)EXAMPLES: Determining Free AreaFURNACE WATER HEATER TOTAL INPUT110,000 + 30,000 (140,000 divided by 4,000) = 35.0 Sq. In. for each two Vertical Ducts or Openings66,000 + 40,000 (106,000 divided by 3,000) = 35.3 Sq. In. for a Single Duct or Opening88,000 + 30,000 (118,000 divided by 2,000) = 59.0 Sq. In. for each of two Horizontal Ducts8 441 01 1402 02 |
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