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

Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 13 page image

13Table 4 – Opening Dimensions -- In. (mm)FURNACECASINGWIDTHIN. (mm)APPLICATIONPLENUM OPENING FLOOR OPENINGA B C D14–3/16(360)Upflow Applications on Combustible or Noncombustible Floor-ing (KGASB subbase not required)12--- 11/16(322)21--- 5/8(549)13--- 5/16(338)22--- 1/4(565)Downflow Applications on Noncombustible Flooring (KGASBsubbase not required)12--- 9/16(319)19(483)13--- 3/16(335)19--- 5/8(498)Downflow applications on combustible flooring (KGASB sub-base required)11--- 13/16(284)19(483)13--- 7/16(341)20--- 5/8(600)Downflow Applications on Combustible Flooring with CNPV,CNRV, CAR or CAP Coil Assembly or KCAKC coil box (KGASBsubbase not required)12--- 5/16(319)19(483)13--- 5/16(338)20(508)17–1/2(445)Upflow Applications on Combustible or Noncombustible Floor-ing (KGASB subbase not required)16(406)21--- 5/8(549)16--- 5/8(422)22--- 1/4(565)Downflow Applications on Noncombustible Flooring (KGASBsubbase not required)15--- 7/8(403)19(483)16--- 1/2(419)19--- 5/8(498)Downflow applications on combustible flooring (KGASB sub-base required)15--- 1/8(384)19(483)16--- 3/4(425)20--- 5/8(600)Downflow Applications on Combustible Flooring with CNPV,CNRV, CAR or CAP Coil Assembly or KCAKC coil box (KGASBsubbase not required)15--- 1/2(394)19(483)16--- 1/2(419)20(508)21(533)Upflow Applications on Combustible or Noncombustible Floor-ing (KGASB subbase not required)19--- 1/2(495)21--- 5/8(549)20--- 1/8(511)22--- 1/4(565)Downflow Applications on Noncombustible Flooring (KGASBsubbase not required)19--- 3/8(492)19(483)20(508)19--- 5/8(498)Downflow applications on combustible flooring (KGASB sub-base required)18--- 5/8(473)19(483)20--- 1/4(514)20--- 5/8(600)Downflow Applications on Combustible Flooring with CNPV,CNRV, CAR or CAP Coil Assembly or KCAKC coil box (KGASBsubbase not required)19(483)19(483)20(508)20(508)24--- 1/2(622)Upflow Applications on Combustible or Noncombustible Floor-ing (KGASB subbase not required)23(584)21--- 1/8(537)23--- 5/8(600)22--- 1/4(565)Downflow Applications on Noncombustible Flooring (KGASBsubbase not required)22--- 7/8(581)19(483)23--- 1/2(597)19--- 5/8(498)Downflow applications on Combustible flooring (KGASB sub-base required)22--- 1/8(562)19(483)23--- 3/4(603)20--- 5/8(600)Downflow Applications on Combustible Flooring with CNPV,CNRV, CAR or CAP Coil Assembly or KCAKC coil box (KGASBsubbase not required)22--- 1/2(572)19(483)23--- 1/2(597)20(508)Filter ArrangementCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personalinjury, or death.Never operate a furnace without a filter or with filter accessdoor removed.! WARNINGThere are no provisions for an internal filter rack in thesefurnaces. A field--supplied accessory external filter rack isrequired.Refer to the instructions supplied with the external filter rack forassembly and installation options.AIR DUCTSGeneral RequirementsThe duct system should be designed and sized according toaccepted national standards such as those published by: AirConditioning Contractors Association (ACCA), Sheet Metal andAir Conditioning Contractors National Association (SMACNA)or American Society of Heating, Refrigerating and AirConditioning Engineers (ASHRAE) or consult The Air SystemsDesign Guidelines reference tables available from your localdistributor. The duct system should be sized to handle therequired system design CFM at the design external static pressure.The furnace airflow rates are provided in Table 5--AirDelivery--CFM (With Filter). When a furnace is installed so thatthe supply ducts carry air circulated by the furnace to areasoutside the space containing the furnace, the return air shall alsobe handled by duct(s) sealed to the furnace casing andterminating outside the space containing the furnace.Secure ductwork with proper fasteners for type of ductwork used.Seal supply-- and return--duct connections to furnace with codeapproved tape or duct sealer.NOTE: Flexible connections should be used between ductworkand furnace to prevent transmission of vibration.Ductwork passing through unconditioned space should beinsulated to enhance system performance. When air conditioningis used, a vapor barrier is recommended.Maintain a 1--in. (25 mm) clearance from combustible materialsto supply air ductwork for a distance of 36--in. (914 mm)horizontally from the furnace. See NFPA 90B or local code forfurther requirements.Ductwork Acoustical TreatmentNOTE: Metal duct systems that do not have a 90 degree elbowand 10 ft. (3 M) of main duct to the first branch take--off mayrequire internal acoustical lining. As an alternative, fibrousductwork may be used if constructed and installed in accordancewith the latest edition of SMACNA construction standard onfibrous glass ducts. Both acoustical lining and fibrous ductworkshall comply with NFPA 90B as tested by UL Standard 181 forClass 1 Rigid air ducts.58CV