Carrier PERFORMANCE 50VT-A Installation Instructions Manual

Also see for COMFORT 50VT-A: Owner's information manual Owner's information manual Installation instructions

Contents

Carrier PERFORMANCE 50VT-A Installation Instructions Manual Manual pdf 8 page image

8screwed or bolted to duct flanges. Use suitable gaskets toensure weather--tight and airtight seal.4. All units must have field--supplied filters or accessory filterrack installed in the return--air side of the unit.Recommended sizes for filters are shown in Table 1.5. Size all ductwork for maximum required airflow (eitherheating or cooling) for unit being installed. Avoid abruptduct size increases or decreases or performance may beaffected.6. Adequately insulate and weatherproof all ductwork locatedoutdoors. Insulate ducts passing through unconditionedspace, and use vapor barrier in accordance with latest issueof Sheet Metal and Air Conditioning Contractors NationalAssociation (SMACNA) and Air Conditioning Contractorsof America (ACCA) minimum installation standards forheating and air conditioning systems. Secure all ducts tobuilding structure.7. Flash, weatherproof, and vibration--isolate all openings inbuilding structure in accordance with local codes and goodbuilding practices.ABCMAXIMUM ALLOWABLEDIFFERENCE in. (mm)A-C1/4 1/4 1/4(6.35) (6.35) (6.35)A-B B-CA07925Fig. 7 -- Unit Leveling TolerancesOPTIONALRETURNAIROPENINGOPTIONALSUPPLYAIROPENINGEVAP. COIL COND. COIL2˝(50.8mm)A07926Fig. 8 -- Slab Mounting DetailStep 6 — Provide for Condensate DisposalNOTE: Ensure that condensate--water disposal methods complywith local codes, restrictions, and practices.The 50VT--A units dispose of condensate through a 3/4 in. NPTfemale fitting that exits on the compressor end of the unit.Condensate water can be drained directly onto the roof in rooftopinstallations (where permitted) or onto a gravel apron in groundlevel installations. Install a field--supplied condensate trap at end ofcondensate connection to ensure proper drainage. Make sure thatthe outlet of the trap is at least 1 in. (25 mm) lower than thedrain--pan condensate connection to prevent the pan fromoverflowing. Prime the trap with water. When using a gravel apron,make sure it slopes away from the unit.If the installation requires draining the condensate water away fromthe unit, install a field--supplied 2 --in. (51mm) trap at thecondensate connection to ensure proper drainage. Condensate trapis available as an accessory or is field--supplied. Make sure that theoutlet of the trap is at least 1 in. (25 mm) lower than the unitdrain--pan condensate connection to prevent the pan fromoverflowing. Connect a drain tube using a minimum offield--supplied 3/4--in. PVC or field--supplied 3/4--in. copper pipeat outlet end of the 2--in. (51 mm) trap. (See Fig. 9) Do notundersize the tube. Pitch the drain tube downward at a slope of atleast 1 in. (25 mm) every 10 ft (3 m) of horizontal run. Be sure tocheck the drain trough for leaks. Prime the trap at the beginning ofthe cooling season start--up.TRAPOUTLET1-in. (25 mm) min.2-in. (51 mm) min.A09052Fig. 9 -- Condensate TrapStep 7 — Install Electrical ConnectionsUNIT COMPONENT DAMAGE HAZARDFailure to follow this caution may result in damage to the unitbeing installed.1. Make all electrical connections in accordance with NECNFPA 70 (latest edition) and local electrical codesgoverning such wiring. In Canada, all electricalconnections must be in accordance with CSA standardC22.1 Canadian Electrical Code Part 1 and applicablelocal codes. Refer to unit wiring diagram.2. Use only copper conductor for connections betweenfield--supplied electrical disconnect switch and unit. DONOT USE ALUMINUM WIRE.3. Be sure that high--voltage power to unit is withinoperating voltage range indicated on unit rating plate. On3--phase units, ensure phases are balanced within 2percent. Consult local power company for correction ofimproper voltage and/or phase imbalance.4. Do not damage internal components when drillingthrough any panel to mount electrical hardware, conduit,etc.! CAUTIONELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.The unit cabinet must have an uninterrupted, unbrokenelectrical ground. This ground may consist of an electricalwire connected to the unit ground screw in the controlcompartment, or conduit approved for electrical ground wheninstalled in accordance with NEC,NFPA 70 National FireProtection Association (latest edition) (in Canada, CanadianElectrical Code CSA C22.1) and local electrical codes.! WARNINGHigh--Voltage ConnectionsThe unit must have a separate electrical service with afield--supplied, waterproof disconnect switch mounted at, or withinsight from the unit. Refer to the unit rating plate, NEC and localcodes for maximum fuse/circuit breaker size and minimum circuitamps (ampacity) for wire sizing.The field--supplied disconnect may be mounted on the unit overthe high--voltage inlet hole when the standard power andlow--voltage entry points are used. See Fig. 2 and 3 for acceptablelocation. Remove high voltage knockout.See unit wiring label (Fig. 12--14) and Fig. 10 for reference whenmaking high voltage connections. Proceed as follows to completethe high--voltage connections to the unit.50VT-- A