Carrier SEER 48ES Installation Instructions Manual

Also see for 48ES: Owner's information manual Installation instructions

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Carrier SEER 48ES Installation Instructions Manual Manual pdf 10 page image

10Table 2 – Maximum Gas Flow Capacity*NOMINALIRON PIPESIZE (IN.)INTERNALDIAMETER(IN.)LENGTH OF PIPE FT (m)†10(3)20(6)30(9)40(12)50(15)60(18)70(21)80(24)90(27)100(30)125(38)150(46)175(53)200(61)1/2 .622 175 120 97 82 73 66 61 57 53 50 44 40 — —3/4 .824 360 250 200 170 151 138 125 118 110 103 93 84 77 721 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 1351--- 1/4 1.380 1400 950 770 600 580 530 490 460 430 400 360 325 300 2801--- 1/2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5 ---in. wc (based on a 0.60 specific gravity gas). Refer to Table,National Fire Protection Association NFPA 54.{ This length includes an ordinary number of fittings.Step 9 — Install Duct ConnectionsThe unit has duct flanges on the supply-- and return--air openingson the side and bottom of the unit. For downshot applications, theductwork connects to the roof curb (See Fig. 3 and 4 forconnection sizes and locations).Configuring Units for Downflow (Vertical) DischargeELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Before installing or servicing system, always turn off mainpower to system and install lockout tag. There may bemore than one disconnect switch.! WARNING1. Open all electrical disconnects before starting any servicework.2. Remove horizontal (metal) duct covers to access vertical(downflow) discharge duct knockouts in unit base.3. Use a screwdriver and hammer to remove the panels in thebottom of the unit base (See Fig. 10).4. If unit ductwork is to be attached to vertical opening flangeson the unit base (jackstand applications only), do so at thistime.PROPERTY DAMAGE HAZARDFailure to follow this caution may result in propertydamage.Collect ALL screws that were removed. Do not leavescrews on rooftop as permanent damage to the roof mayoccur.CAUTION!5. It is recommended that the base insulation around theperimeter of the vertical return--air opening be secured tothe base with aluminum tape. Applicable local codes mayrequire aluminum tape to prevent exposed fiberglass.6. Cover both horizontal duct openings with the provided ductcovers. Ensure opening is air-- and watertight.7. After completing unit conversion, perform all safety checksand power up unit.NOTE: The design and installation of the duct system must be inaccordance with the standards of the NFPA for installation ofnonresidence--type air conditioning and ventilating systems, NFPA90A or residence--type, NFPA 90B; and/or local codes andordinances.SUPPLYDUCTOPENINGRETURNDUCTOPENINGVENT HOODSHIPPINGLOCATIONA08492Fig. 9 -- Supply and Return Duct OpeningVERTICAL DUCT COVERSA08489Fig. 10 -- Vertical Duct Cover Removed48ES