Carrier Performance 48VL-A Installation Instructions Manual

Also see for 48VL-A: Owner's information manual

Contents

52Copeland Scroll Compressor (Puron Refrigerant)The compressor used in this product is specifically designed tooperate with Puron (R--410A) refrigerant and cannot beinterchanged.The compressor is an electrical (as well as mechanical) device.Exercise extreme caution when working near compressors. Powershould be shut off, if possible, for most troubleshooting techniques.Refrigerants present additional safety hazards.FIRE/EXPLOSION HAZARDFailure to follow this warning could result in personalinjury or death and/or property damage.Wear safety glasses and gloves when handling refrigerants.Keep torches and other ignition sources away fromrefrigerants and oils.! WARNINGThe scroll compressor pumps refrigerant throughout the system bythe interaction of a stationary and an orbiting scroll. The scrollcompressor has no dynamic suction or discharge valves, and it ismore tolerant of stresses caused by debris, liquid slugging, andflooded starts. The compressor is equipped with a noise reducingshutdown device and an internal pressure relief port. The pressurerelief port is a safety device, designed to protect against extremehigh pressure. The relief port has an operating range between 550(26.34 kPa) and 625 psig (29.93 kPa) differential pressure.EXPLOSION, ENVIRONMENTAL SAFETYHAZARDFailure to follow this warning could result in personalinjury, death or equipment damage.This system uses Puron (R--410A) refrigerant which hashigher operating pressures than R--22 and other refrigerants.No other refrigerant may be used in this system. Gauge set,hoses, and recovery system must be designed to handlePuron. If you are unsure, consult the equipmentmanufacturer.WARNING!Refrigerant SystemThis information covers the refrigerant system of the 48VL--A,including the compressor oil needed, servicing systems on roofscontaining synthetic materials, the filter drier and refrigerantcharging.Compressor OilThe Copeland scroll compressor uses 3MAF POE oil. If additionaloil is needed, use Uniqema RL32--3MAF. If this oil is notavailable, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.This oil is extremely hygroscopic, meaning it absorbs waterreadily. POE oils can absorb 15 times as much water as other oilsdesigned for HCFC and CFC refrigerants. Take all necessaryprecautions to avoid exposure of the oil to the atmosphere.Servicing Systems on Roofs with Synthetic MaterialsPOE (polyolester) compressor lubricants are known to cause longterm damage to some synthetic roofing materials.Exposure, even if immediately cleaned up, may causeembrittlement (leading to cracking) to occur in one year or more.When performing any service that may risk exposure ofcompressor oil to the roof, take appropriate precautions to protectroofing. Procedures which risk oil leakage include, but are notlimited to, compressor replacement, repairing refrigerant leaks,replacing refrigerant components such as filter drier, pressureswitch, metering device, coil, accumulator, or reversing valve.Synthetic Roof Precautionary Procedure1. Cover extended roof working area with an impermeablepolyethylene (plastic) drip cloth or tarp. Cover anapproximate 10 X 10 ft. (3.1 m X 3.1 m) area.2. Cover area in front of the unit service panel with a terrycloth shop towel to absorb lubricant spills and preventrun--offs, and protect drop cloth from tears caused by toolsor components.3. Place terry cloth shop towel inside unit immediately undercomponent(s) to be serviced and prevent lubricant run--offsthrough the louvered openings in the unit base.4. Perform required service.5. Remove and dispose of any oil contaminated material perlocal codes.Liquid Line Filter DrierThis filter drier is specifically designed to operate with Puron. Useonly factory--authorized components. Filter drier must be replacedwhenever the refrigerant system is opened. When removing a filterdrier, use a tubing cutter to cut the drier from the system. Do notunsweat a filter drier from the system. Heat from unsweating willrelease moisture and contaminants from drier into system.Puron (R--410A) Refrigerant ChargingRefer to unit information plate and charging chart. Some R--410Arefrigerant cylinders contain a dip tube to allow liquid refrigerant toflow from cylinder in upright position. For cylinders equippedwith a dip tube, charge Puron units with cylinder in uprightposition and a commercial metering device in manifold hose.Charge refrigerant into suction--line.TROUBLESHOOTINGUse the Troubleshooting Guides (See Tables 13--15) if problemsoccur with these units.START--UP CHECKLISTUse Start--Up checklist to ensure proper start--up procedures arefollowed.48VL-- A