Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual

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Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual Manual pdf 68 page image

68Table 10 — Bolt Torque Requirements, Foot PoundsLeak Test Chiller — Due to regulations regarding refrig-erant emissions and the difficulties associated with separatingcontaminants from the refrigerant, Carrier recommends thefollowing leak test procedure. Refer to Tables 11A and 11B forrefrigerant pressure/temperature values.1. If the pressure readings are normal for the chillercondition:a. Evacuate the holding charge from the vessels, ifpresent.b. Raise the chiller pressure, if necessary, by addingrefrigerant until pressure is at the equivalent satu-rated pressure for the surrounding temperature.Follow pumpout procedures in the Transfer Refrig-erant from Storage Tank Vessel to Chiller section,page 91.c. Leak test chiller as outlined in Steps 3 - 9.2. If the pressure readings are abnormal for the chiller con-dition:a. Prepare to leak test chillers shipped with refriger-ant (Step 2h).b. Check for large leaks by connecting a nitrogen bottleand raising the pressure to 30 psig (207 kPa). Soaptest all joints. If the test pressure holds for 30 minutes,prepare the test for small leaks (Steps 2g - h).c. Plainly mark any leaks that are found.d. Release the pressure in the system.e. Repair all leaks.f. Retest the joints that were repaired.g. After successfully completing the test for largeleaks, remove as much nitrogen, air, and moistureas possible, given the fact that small leaks may bepresent in the system. This can be accomplished byfollowing the dehydration procedure, outlined inthe Chiller Dehydration section, page 71.h. Slowly raise the system pressure to a maximum of160 psig (1103 kPa) but no less than 35 psig(241 kPa) for HFC-134a by adding refrigerant.Proceed with the test for small leaks (Steps 3-9).3. Check the chiller carefully with an electronic leak detec-tor or soap bubble solution.4. Leak Determination — If an electronic leak detector indi-cates a leak, use a soap bubble solution, if possible, toconfirm. Total all leak rates for the entire chiller. Leakageat rates greater than 0.1% of the total charge per year mustbe repaired. Note the total chiller leak rate on the start-upreport.5. If no leak is found during the initial start-up procedures,complete the transfer of refrigerant gas from the pumpoutstorage tank to the chiller. Retest for leaks.BOLT SIZE(IN.)SAE 2, A307 GR AHEX HEADNO MARKSLOW CARBON STEELSAE 5, SA449SOCKET HEAD OR HEXWITH 3 RADIAL LINESMEDIUM CARBON STEELSAE 8, SA354 GR BDHEX HEADWITH 6 RADIAL LINESMEDIUM CARBON STEELMINIMUM MAXIMUM MINIMUM MAXIMUM MINIMUM MAXIMUM1 / 4 4 6 6 9 9 135 / 16 8 11 13 18 20 283 / 8 13 19 22 31 32 467 / 16 21 30 35 50 53 751 / 2 32 45 53 75 80 1159 / 16 46 65 75 110 115 1655 / 8 65 95 105 150 160 2253 / 4 105 150 175 250 260 3707 / 8 140 200 265 380 415 5901 210 300 410 580 625 8931 1 / 8 330 475 545 780 985 1,4101 1 / 4 460 660 770 1,100 1,380 1,9601 3 / 8 620 885 1,020 1,460 1,840 2,6301 1 / 2 740 1060 1,220 1,750 2,200 3,1501 5 / 8 1010 1450 1,670 2,390 3,020 4,3101 3 / 4 1320 1890 2,180 3,110 3,930 5,6101 7 / 8 1630 2340 2,930 4,190 5,280 7,5502 1900 2720 3,150 4,500 5,670 8,1002 1 / 4 2180 3120 4,550 6,500 8,200 11,7102 1 / 2 3070 4380 5,000 7,140 11,350 16,2102 3 / 4 5120 7320 8,460 12,090 15,710 22,4403 6620 9460 11,040 15,770 19,900 28,440WARNINGDo not use air or oxygen as a means of pressurizing thechiller. Mixtures of HFC-134a and air can undergocombustion.WARNINGNever charge liquid refrigerant into the chiller if the pres-sure in the chiller is less than 35 psig (241 kPa) for HFC-134a. Charge as a gas only, with the cooler and condenserpumps running, until this pressure is reached, usingPUMPDOWN LOCKOUT and TERMINATE LOCK-OUT mode on the PIC II. Flashing of liquid refrigerant atlow pressures can cause tube freeze-up and considerabledamage.