York SUNLINE 2000 H4CE120 Installation Manual

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York SUNLINE 2000 H4CE120 Installation Manual Manual pdf 10 page image

moisture from the atmosphere, it loses its effective-ness.Recover the holding charge in the evaporator coil and then re-move the sealing caps or discs from both the liquid and suctionconnections on the evaporator coil per the following procedure:1. Make sure the refrigerant in the lines has been recovered,then drill a small hole through both the liquid disc and thesuction disc. If the holding charge has already been lost,the coil should be leak-tested and the necessary repairsshould be made.2. Move the dry nitrogen supply from the access port on theliquid line service valve of the condensing unit to the holethrough the suction disc on the evaporator coil.3. Unbraze the coil's liquid line disc while maintaining a flow ofdry nitrogen across the connection and through the hole inthe liquid line disc.NOTE: If the liquid line has a solenoid valve, the valveshould be opened manually to permit the nitrogento flow freely.4. After the disc has been removed, burnish the external sur-faces and clean the internal surfaces as outlined above.5. Move the dry nitrogen supply back to the access port on theliquid line service valve.6. Braze the liquid line to the liquid connection on the evapora-tor coil while maintaining a minimum flow of dry nitrogenthrough the liquid line, the evaporator coil and the hole inthe suction disc.7. Unbraze the disc on the suction connection of the evapora-tor coil while maintaining the flow of dry nitrogen.8. After the disc has been removed, burnish the external sur-faces and clean the internal surfaces as outlined above.The suction piping can now be brazed to the suction connec-tion on the evaporator coil while maintaining a minimum flow ofdry nitrogen.Before brazing the suction line to the condensing unit;1. Move the dry nitrogen supply to the access port on the suc-tion service valve of the condensing unit.2. Burnish the external surfaces and clean the internal sur-faces of both the suction connection and the suction piping.The suction line can now be brazed to the suction connectionon the condensing unit while maintaining the flow of dry nitro-gen.After the liquid and suction lines have been installed, the sys-tem should be evacuated and charged.EXTENDING THE SERVICE PORTS1. Loosen the screws securing the service ports in shippingposition. (See FIG 6).2. Push the service ports through the corner post.3. Tighten the screws to secure the service ports for installa-tion.EVACUATION AND CHARGINGDetermine the required weight of refrigerant using Table 2,Physical Data, and Table 6 Refrigerant Line Charge. Table 2includes operating charge based on the unit plus 25 feet of re-frigerant lines. Table 6 includes data required to adjust thecharge for line lengths other than 25 feet.With the liquid and suction line service valves closed, connecta vacuum pump through a charging manifold to the accessports on both the liquid and suction line service valves.NOTE: The vacuum pump connection should be short and nosmaller than 3/8" O.D.The refrigerant lines and the evaporator coil can now be evacu-ated to 500 Microns without disturbing the condenser coil or thecompressor.After proper evacuation and dehydration, charge the requiredweight of liquid refrigerant through the access port on the liquidline service valve.CAUTION: Do not charge liquid refrigerant through the com-pressor suction connection.CAUTION: Do not attempt to start the compressor without atleast 8 hours of crankcase heat or compressordamage will occur.If the required amount of refrigerant cannot be added in thismanner, open the liquid and the suction line service valvesfully. Turn the stem of the liquid service valve clockwise 1/4 turnto open its access port for reading pressure.Start the compressor (after 8 hours of crankcase heat) andcontinue to charge refrigerant gas through the access port onthe suction service valve.Open the liquid service valve fully to close its access port afterthe system is charged.CAUTION: Never operate the compressor while under a deepvacuum.CAUTION: Do not attempt to start the compressor without atleast 8 hours of crankcase heat or compressordamage will occur.After proper evacuation and dehydrating of the unit, charge theunit as described above until the moisture indicating sight glassis clear. Add approximately 1 extra pound of refrigerant for theHCE090 and 120 or 3 pounds for the HCE150 to assure a liq-uid refrigerant seal at the expansion valve under all operatingconditions. If necessary, block the flow of condenser air to as-sure a head pressure of 280 psig during the charging opera-tion.EVACUATION AND CHARGING035-15406-002-A-050410 Unitary Products GroupDO NOT ATTEMPT TO START THE COMPRESSOR WITH-OUT AT LEAST 8 HOURS OF CRANKCASE HEAT OR COM-PRESSOR DAMAGE WILL OCCUR.