Carrier 50TJ016-028 Installation, Start-up And Service Instructions Manual

Also see for 50TJ016: Installation, Start-Up and Service Instructions Installation instructions

Contents

7Step 3 — 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.The 50TJ units with electric heat require a 1-in. clearancefor the first 24 in. of ductwork.Outlet grilles must not lie directly below unit discharge.NOTE: A 90-degree elbow must be provided in the ductworkto comply with UL (Underwriters’ Laboratories) codes for usewith electric heat.Step 4 — Make Unit Duct Connections — Unitis shipped for through-the-bottom duct connections. Ductworkopenings are shown in Fig. 6. Field-fabricated concentric duct-work may be connected as shown in Fig. 7 and 8. Attach allductwork to roof curb and roof curb basepans. Refer to installa-tion instructions shipped with accessory roof curb for moreinformation.Step 5 — Trap Condensate Drain — See Fig. 4, 5,and 9 for drain location. Plug is provided in drain hole andmust be removed when unit is operating. One 3/4-in. half-coupling is provided inside unit evaporator section for conden-sate drain connection. An 81/2 in. x 3/4-in. diameter nipple and a2-in. x 3/4-in. diameter pipe nipple are coupled to standard3/4-in. diameter elbows to provide a straight path down throughholes in unit base rails (see Fig. 10). A trap at least 4-in. deepmust be used.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.Due to electric heater, supply duct will require 90 degreeelbow.NOTE: Do not drill in this area; damage to basepan may result inwater leak.Fig. 6 — Air Distribution — Thru-the-Bottom(50TJ020-028 Shown)NOTE: Do not drill in this area; damage to basepan may result inwater leak.Fig. 7 — Concentric Duct Air Distribution(50TJ020-028 Shown)3/4" FPT DRAINCONNECTION 1-3/8"DRAIN HOLESShaded area indicates block-off panels.NOTE: Dimensions A, A′, and B, B′ are obtained from field-suppliedceiling diffuser.Fig. 8 — Concentric Duct DetailsFig. 9 — Condensate Drain Details(50TJ016,020 Shown)