Carrier 50VL-A Performance Installation Instructions Manual

Also see for Performance 50VL-A: Owner's information manual Installation instructions Installation instructions Installation instructions

Contents

2ELECTRICAL 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. Turn off accessory heaterpower switch if applicable.! WARNINGPERSONAL INJURY AND ENVIRONMENTALHAZARDFailure to relieve system pressure could result in personalinjury and/or death.1. Relieve pressure and recover all refrigerant beforeservicing existing equipment, and before final unit disposal.Use all service ports and open all flow--control devices,including solenoid valves.2. Federal regulations require that you do not ventrefrigerant into the atmosphere. Recover during systemrepair or final unit disposal.! WARNINGCUT HAZARDFailure to follow this caution may result in personal injury.When removing access panels (see Fig. 17) or performingmaintenance functions inside your unit, be aware of sharpsheet metal parts and screws. Although special care is taken toreduce sharp edges to a minimum, be extremely careful whenhandling parts or reaching into the unit.! CAUTIONINTRODUCTIONThe 50VL--A packaged air conditioner is fully self--contained anddesigned for outdoor installation (See Fig.1 ). See Fig. 2 and 3 forunit dimensions. All unit sizes have discharge openings for bothhorizontal and downflow configurations, and are factory shippedwith all downflow duct openings covered. The unit may beinstalled either on a rooftop or on a ground--level cement slab. (SeeFig. 4 for roof curb dimensions.)RECEIVING AND INSTALLATIONStep 1 — Check EquipmentIDENTIFY UNITThe unit model number and serial number are printed on the unitinformative plate. Check this information against shipping papers.INSPECT SHIPMENTInspect for shipping damage before removing packaging materials.If unit appears to be damaged or is torn loose from its anchorage,have it examined by transportation inspectors before removal.Forward claim papers directly to transportation company.Manufacturer is not responsible for any damage incurred in transit.Check all items against shipping list. Immediately notify thenearest equipment distribution office if any item is missing. Toprevent loss or damage, leave all parts in original packages untilinstallation.If the unit is to be mounted on a curb in a downflow application,review Step 7 to determine which method is to be used to removethe downflow panels before rigging and lifting into place. Thepanel removal process may require the unit to be on the ground.Step 2 — Provide Unit SupportIMPORTANT: The unit must be secured to the curb by installingscrews through the bottom of the curb flange and into the unit baserails. When installing large base units onto the common curb, thescrews must be installed before allowing the full weight of the unitto rest on the curb. A minimum of six screws are required for largebase units. Failure to secure unit properly could result in anunstable unit. See Warning near Rigging/Lifting information andaccessory curb instructions for more details.For hurricane tie downs, contact distributor for details and PE(Professional Engineering) Certificate if required.ROOF CURBInstall accessory roof curb in accordance with instructions shippedwith curb (See Fig. 4). Install insulation, cant strips, roofing, andflashing. Ductwork must be attached to curb.IMPORTANT: The gasketing of the unit to the roof curb iscritical for a water tight seal. Install gasketing material suppliedwith the roof curb. Improperly applied gasketing also can result inair leaks and poor unit performance.Curb should be level to within 1/4 in. (6.35 mm) (See Fig 6). Thisis necessary for unit drain to function properly. Refer to accessoryroof curb installation instructions for additional information asrequired.Installation on older “G” series roof curbs.Two accessory kits are available to aid in installing a new “G”series unit on an old “G” roof curb.1. Accessory kit number CPADCURB001A00, (small chassis)and accessory kit number CPADCURB002A00, (largechassis) includes roof curb adapter and gaskets for theperimeter seal and duct openings. No additionalmodifications to the curb are required when using this kit.2. An alternative to the adapter curb is to modify the existingcurb by removing the outer horizontal flange and useaccessory kit number CPGSKTKIT001A00 which includesspacer blocks (for easy alignment to existing curb) andgaskets for the perimeter seal and duct openings. This kit isused when existing curb is modified by removing outerhorizontal flange.UNIT/STRUCTURAL DAMAGE HAZARDFailure to follow this caution may result in property damage.Ensure there is sufficient clearance for saw blade when cuttingthe outer horizontal flange of the roof curb so there is nodamage to the roof or flashing.! CAUTIONSLAB MOUNTPlace the unit on a solid, level concrete pad that is a minimum of 4in. (102 mm) thick with 2 in. (51 mm) above grade. The slabshould extend approximately 2 in. (51 mm) beyond the casing onall 4 sides of the unit (See Fig. 7). Do not secure the unit to the slabexcept when required by local codes.50VL-- A