Carrier 50TC*D17 Series Installation Instructions Manual

Also see for 50TC*D17 Series: Service and maintenance instructions

Contents

50TC*D7Table 1 – Operating Weights50TC*D UNITS KG (LB)Component D17 D20 D24 D28Base Unit 770 (1697) 777 (1712) 1862 (845) 1991 (903)Economizer 111 (245) 111 (245) 245 (111) 245 (111)Curb356 mm/14--- in 111 (245) 111 (245) 124 (273) 124 (273)610 mm/24--- in 143 (315) 143 (315) 159 (350) 159 (350)Step 2 — Plan for Sequence of Unit InstallationThe support method used for this unit will dictate differentsequences for the steps of unit installation. For example,on curb--mounted units, some accessories must beinstalled on the unit before the unit is placed on the curb.Review the following for recommended sequences forinstallation steps.Curb--mounted installation —Install curbInstall field--fabricated ductwork inside curbInstall thru--base service connection fittings (affectscurb and unit)Rig and place unitRemove top skidInstall condensate line trap and pipingMake electrical connectionsInstall other accessoriesPad--mounted installation —Prepare pad and unit supportsRig and place unitRemove duct covers and top skidInstall field--fabricated ductwork at unit duct openingsInstall condensate line trap and pipingMake electrical connectionsInstall other accessoriesFrame--mounted installation —Frame--mounted applications generally follow thesequence for a curb installation. Adapt as required tosuit specific installation plan.Step 3 — Inspect unitInspect unit for transportation damage. File any claimwith transportation agency.Confirm before installation of unit that voltage, amperageand circuit protection requirements listed on unit dataplate agree with power supply provided.Step 4 — Provide Unit SupportRoof Curb Mount —Accessory roof curb details and dimensions are shown inFig. 4 (size 17 and 20 units) and Fig. 5 (size 24 and 28units). Assemble and install accessory roof curb inaccordance with instructions shipped with the curb.NOTE: The gasketing of the unit to the roof curb iscritical for a watertight seal. Install gasket supplied withthe roof curb as shown in Fig. 4 and Fig. 5. Improperlyapplied gasket can also result in air leaks and poor unitperformance.Curb should be level. This is necessary for unit drain tofunction properly. Unit leveling tolerances are show inFig. 6. Refer to Accessory Roof Curb InstallationInstructions for additional information as required.Install insulation, cant strips, roofing felt, and counterflashing as shown. Ductwork must be attached to curb andnot to the unit. Thru--the--base power connection must beinstalled before the unit is set on the roof curb.If electric and control wiring is to be routed through thebasepan remove knockouts in basepan located in controlbox area, see Fig. 7 for location. Attach the serviceconnections to the basepans.Slab Mount (Horizontal Units Only) —Provide a level concrete slab that extends a minimum of150 mm (6–in.) beyond unit cabinet. Install a gravel apronin front of condenser coil air inlet to prevent grass andfoliage from obstructing airflow.NOTE: Horizontal units may be installed on a roof curbif required.Alternate Unit Support (In Lieu of Curb or SlabMount) —A non--combustible sleeper rail can be used in the unitcurb support area. If sleeper rails cannot be used, supportthe long sides of the unit with a minimum of 4 equallyspaced 102 mm x 102 mm (4--in. x 4--in.) pads on eachside. Locate pads so that they support the rails. Make sureto avoid the fork openings.