Carrier 50HG014-028 Installation Instructions Manual

Also see for 50HG014-028: Installation instructions

Contents

Carrier 50HG014-028 Installation Instructions Manual Manual pdf 8 page image

8Step 4 — Field Fabricate Ductwork — Secure allducts to building structure. Use flexible duct connectors be-tween unit and ducts as required. Insulate and weatherproof allexternal ductwork, joints, and roof openings with counterflashing and mastic in accordance with applicable codes.Ducts passing through an unconditioned space must be in-sulated and covered with a vapor barrier.Step 5 — Make Unit Duct ConnectionsVERTICAL CONFIGURATION — Unit is shipped for thru-the-bottom duct connections. Ductwork openings are shown inFig. 1 and 4. Duct connections for vertical supply and returnconfiguration are shown in Fig. 7. Field fabricated concentricductwork may be connected as shown in Fig. 8 and 9. The unitis designed to attach the ductwork to the roof curb. Do notattach duct directly to the unit basepans.Unit basepans must be supported under the unit and aroundduct openings in order to prevent air leakage.Units with electric heat require a 1-in. clearance for the first24 in. of ductwork. Outlet grilles must not lie directly belowunit discharge.NOTE: A 90-degree elbow must be provided in the supplyductwork to comply with UL (Underwriters’ Laboratories)codes for use with electric heat.HORIZONTAL APPLICATIONS — Horizontal units areshipped with outer panels that allow for side by side horizontalduct connections. If specified during ordering, the unit will beshipped with the vertical duct openings blocked off from thefactory, ready for side supply installation. If the horizontaloption was not specified at time of ordering the unit, a field-installed accessory kit is required to convert the vertical unitinto a horizontal supply configuration.Installation of the duct block-off covers should be complet-ed prior to placing the unit unless sufficient side clearance isavailable. A minimum of 66-in. is required between the unitand any obstruction to install the duct block-off covers. Sidesupply duct dimensions and locations are shown on Fig. 4.Connect ductwork to horizontal duct flange connections onside of unit.For vertical supply and return units, tools or parts coulddrop into ductwork and cause an injury. Install a 90-degreeturn in the return ductwork between the unit and the condi-tioned space. If a 90-degree elbow cannot be installed, thena grille of sufficient strength and density should be installedto prevent objects from falling into the conditioned space.ALIGNMENTHOLE SHOULDLINE UP WITHROOF CURBEDGE FLANGEEDGE FLANGEALIGNMENTHOLE(IN BASE RAIL)SUPPLYOPENINGRETURNOPENINGALIGNMENTHOLES FORHJ, TJ, DP, DRCURB-BOTHSIDESROOF CURBCURBSUPPLYOPENINGCURBRETURNOPENINGALIGNMENTHOLES FOR HGCURB-BOTHSIDESFig. 5 — Alignment Hole DetailsFig. 6 — Alignment Hole LocationSEENOTESEENOTEAIR OUTAIR INAIR OUTECONOMIZERNOTE: Do not drill in this area; damage to basepan may result inwater leak.Fig. 7 — Air Distribution —Vertical Supply and ReturnNOTE: Do not drill in this area; damage to basepan may result inwater leak.Fig. 8 — Air Distribution — Concentric DuctSEENOTE SEENOTEAIROUTAIRINECONOMIZER