Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions

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Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 23 page image

1. Vent connector is Type-B double-wall, and2. This furnace is common vented with at least 1 draft hood-equipped appliance, and3. The combined appliance input rating is less than the maximumcapacity given in Table A, and4. The input rating of each space heating appliance is greaterthan the minimum input rating given in Table B for the localwinter design temperature. Chimneys having internal areasgreater than 38 square inches require furnace input ratingsgreater than the input ratings of these furnaces. See footnaot atbottom of Table B, and5. The authority having jurisdiction approves.If all of these conditions cannot be met, an alternative ventingdesign shall be used, such as the listed chimney adapter kit with afurnace listed for use with the kit, a listed chimney-lining system,or a Type-B common vent.Exterior Masonry ChimneyFAN + NAT Installations withType-B Double-Wall Vent ConnectorsTable A—Combined ApplianceMaximum Inut Rating inThousands of BTU per HourVENTHEIGHT (FT)INTERNAL AREA OF CHIMNEY(SQ. IN.)12 19 28 386 74 119 178 2578 80 130 193 27910 84 138 207 29915 NR 152 233 33420 NR NR 250 36830 NR NR NR 404Table B-Minimum Allowable Input Rating ofSpace-Heating Appliance inThousands of BTU per HourVENTHEIGHT (FT)INTERNAL AREA OF CHIMNEY(SQ. IN.)12 19 28 38Local 99% Winter DesignTemperature: 17 to 26 degrees F*17 to 26 F6 0 55 99 1418 52 74 111 15410 NR 90 125 16915 NR NR 167 21220 NR NR 212 25830 NR NR NR 362Local 99% Winter DesignTemperature: 5 to 16 degrees F*5 to 16 F6 NR 78 121 1668 NR 94 135 18210 NR 111 149 19815 NR NR 193 24720 NR NR NR 29330 NR NR NR 377Local 99% Winter DesignTemperature: -10 to 4 degrees F*-10 to 4 F6 NR NR 145 1968 NR NR 159 21310 NR NR 175 23115 NR NR NR 28320 NR NR NR 33330 NR NR NR NRLocal 99% Winter DesignTemperature: -11 degrees F or lower*-11 F or lower Not recommended for any ventconfiguration*The 99% Winter Design Dry-Bulb (db) temperatures are found in the 1993ASHRAE Fundamentals Handbook, Chapter 24, Table 1 (United States) and2 (Canada), or use the 99.6% heating db temperatures found in the 1997 or2001 ASHRAE Fundamentals Handbook, Climatic Design Information chap-ter, Table 1A (United States) and 2A (Canada).Inspections before the sale and at the time of installation willdetermine the acceptability of the chimney or the need for repairand/or (re)lining. Refer to the Fig. 33 to perform a chimneyinspection. If the inspection of a previously used tile-lined chim-ney:a. Shows signs of vent gas condensation, the chimney shouldbe relined in accordance with local codes and the authorityhaving jurisdiction. The chimney should be relined with alisted metal liner, Type-B vent, or a listed chimney adapterkit shall be used to reduce condensation. If a condensatedrain is required by local code, refer to the NFGC, Section7.9 for additional information on condensate drains.b. Indicates the chimney exceeds the maximum permissiblesize in the tables, the chimney should be rebuilt or relinedto conform to the requirements of the equipment beinginstalled and the authority having jurisdiction.A chimney without a clay tile liner, which is otherwise in goodcondition, shall be rebuilt to conform to ANSI/NFPA 211 or belined with a UL listed (ULC listed in Canada) metal liner or ULlisted Type-B vent. Relining with a listed metal liner or Type-Bvent is considered to be a vent-in-a-chase.If a metal liner or Type-B vent is used to line a chimney, no otherappliance shall be vented into the annular space between thechimney and the metal liner.APPLIANCE APPLICATION REQUIREMENTSAppliance operation has a significant impact on the performanceof the venting system. If the appliances are sized, installed,adjusted, and operated properly, the venting system and/or theappliances should not suffer from condensation and corrosion. Theventing system and all appliances shall be installed in accordancewith applicable listings, standards, and codes.The furnace should be sized to provide 100 percent of the designheating load requirement plus any margin that occurs because offurnace model size capacity increments. Heating load estimatescan be made using approved methods available from Air Condi-tioning Contractors of America (Manual J); American Society ofHeating, Refrigerating, and Air-Conditioning Engineers; or otherapproved engineering methods. Excessive oversizing of the fur-nace could cause the furnace and/or vent to fail prematurely.When a metal vent or metal liner is used, the vent must be in goodcondition and be installed in accordance with the vent manufac-turer’s instructions.To prevent condensation in the furnace and vent system, thefollowing precautions must be observed:1. The return-air temperature must be at least 60°F db except forbrief periods of time during warm-up from setback at no lowerthan 55°F db or during initial start-up from a standbycondition.2. Adjust the gas input rate per the installation instructions. Lowgas input rate causes low vent gas temperatures, causing22