Carrier 50TCQA Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

Contents

5Roof mount —Check building codes for weight distributionrequirements. Unit operating weight is shown in Table 1.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 accessory thru--base service connection package(affects curb and unit) (refer to accessory installationinstructions for details)Prepare bottom condensate drain connection to suitplanned condensate line routing (refer to Step 9 fordetails)Rig and place unitInstall outdoor air hoodInstall condensate line trap and pipingMake electrical connectionsInstall other accessoriesPad--mounted installation —Prepare pad and unit supportsCheck and tighten the bottom condensate drainconnection plugRig and place unitConvert unit to side duct connection arrangementInstall field--fabricated ductwork at unit duct openingsInstall outdoor air hoodInstall 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. 3. 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. 3. Improperly appliedgasket 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. 4. 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. The accessory thru--the--base power packagemust be installed before the unit is set on the roof curb.If electric and control wiring is to be routed through thebasepan, attach the accessory thru--the--base serviceconnections to the basepan in accordance with theaccessory installation instructions.Slab Mount (Horizontal Units Only) —Provide a level concrete slab that extends a minimum of6 in. (150 mm) 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 unit curbsupport area. If sleeper rails cannot be used, support the longsides of the unit with a minimum of 3 equally spaced 4--in. x4--in. (102 mm x 102 mm) pads on each side.Table 1 – Operating Weights50TCQA UNITS LB (KG)Component A04 A05 A06 A07Base Unit 505 (229) 510 (231) 590 (268) 630 (286)EconomizerVertical 80 (36) 80 (36) 80 (36) 80 (36)Horizontal 105 (48) 105 (48) 105 (48) 105 (48)Powered Outlet 32 (15) 32 (15) 32 (15) 32 (15)Curb14--- in/356 mm 110 (50) 110 (50) 110 (50) 110 (50)24--- in/610 mm 145 (66) 145 (66) 145 (66) 145 (66)50TCQA