Carrier PHD4 F Series Installation Instructions Manual

51801200404 35Specifications are subject to change without notice.This system uses R--410A refrigerant which has higher operatingpressures than R--22 and other refrigerants. No other refrigerantmay be used in this system. Gage set, hoses, and recovery systemmust be designed to handle R--410A. If you are unsure, consult theequipment manufacturer. Failure to use R--410A compatibleservicing equipment or replacement components may result inproperty damage or injury.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 to 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 ifimmediately cleaned up, may cause embrittlement (leading tocracking) to occur in one year or more. When performing anyservice that may risk exposure of compressor oil to the roof, takeappropriate precautions to protect roofing. Procedures which riskoil leakage include, but are not limited to, compressor replacement,repairing refrigerant leaks, replacing refrigerant components suchas filter drier, pressure switch, 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 10x10 ft (3x3 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 DrierThe biflow filter drier is specifically designed to operate withR--410A. Use only factory--authorized components. Filter driermust be replaced whenever the refrigerant system is opened. Whenremoving a filter drier, use a tubing cutter to cut the drier from thesystem. Do not unsweat a filter drier from the system. Heat fromunsweating will release moisture and contaminants from drier intosystem.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 R--410A units with cylinder in uprightposition and a commercial metering device in manifold hose.Charge refrigerant into suction--line.Step 13 — System InformationLoss of Charge SwitchThe loss of charge switch is a protective device wired into controlcircuit (low voltage). It shuts off the compressor if abnormally lowpressures are present in the refrigeration circuit.NOTE: Because these switches are attached to refrigerationsystem under pressure, it is not advisable to remove this device fortroubleshooting unless you are reasonably certain that a problemexists. If switch must be removed, remove and recover all systemcharge so that pressure gauges read 0 psig. Never open systemwithout breaking vacuum with dry nitrogen.Check Defrost ThermostatThe defrost thermostat is usually located on the lowest liquidleaving circuit of the left condenser coil (see Fig. 25). Thethermostat closes at 32_F (0_C) and opens at 65_F (18_C).The defrost thermostat signals heat pump that conditions are rightfor defrost or that conditions have changed to terminate defrost. Itis a thermally actuated switch clamped to outdoor coil to sense itstemperature. Normal temperature range is closed at 32_  3_F (0 1.7_C) and open at 65_  5_F (18  2.8_C).NOTE: The defrost thermostat must be located on the liquid sideof the outdoor coil on the bottom circuit and as close to the coil aspossible. The factor location is on the left/back coil.FEEDER TUBESTUB TUBEDEFROSTTHERMOSTATC99029Fig. 25 -- Defrost ThermostatTROUBLESHOOTINGRefer to the Cooling and Heating Troubleshooting Chart (Table11) for troubleshooting information.START--UP CHECKLISTUse the Start--Up Checklist.PH4D, WPH4

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