Carrier AQUASNAP 30RAP010-150 Controls, Start-up, Operation, Service, And Troubleshooting

Also see for AQUASNAP 30RAP010-150: Start up & operation manual Installation instructions Installation instructions Controls, start-up, operation, service, and troubleshooting

Carrier AQUASNAP 30RAP010-150 Controls, Start-up, Operation, Service, And Troubleshooting Manual pdf 46 page image

46compressor circuit breakers off/open. The crankcase heatersare now energized.Actual Start-Up — Actual start-up should be done onlyunder supervision of a qualified refrigeration mechanic.1. Be sure all service valves are open.2. Using the scrolling marquee display, set leaving-fluid setpoint (Set PointsCOOLCSP.1). No cooling rangeadjustment is necessary.3. Start chilled fluid pump (if not configured for coolerpump control).4. Turn ENABLE/OFF/REMOTE CONTACT switch toENABLE position.5. Allow unit to operate and confirm that everything is func-tioning properly. Check to see that leaving fluid tempera-ture agrees with leaving set point (Set PointsCOOLCSP.1) or (Set PointsCOOLCSP.2), or if reset isused, with the control point (Run StatusVIEWCTPT).6. Check the cooler leaving chilled water temperature to seethat it remains well above 32 F (0° C), or the brine freez-ing point if the unit is a medium temperature brine unit.7. Recheck compressor oil level (see Oil Charge section).Check Refrigerant Charge — All 30RAP units areshipped with a complete operating charge of R-410A andshould be under sufficient pressure to conduct a leak test afterinstallation. If there is no system pressure, admit nitrogen untila pressure is observed and then proceed to test for leaks. Afterleaks are repaired, the system must be dehydrated.All refrigerant charging should be done through the 1/4-in.Schrader connection on the liquid line. Do NOT add refrigerantcharge through the low-pressure side of the system. If completecharging is required, weigh in the appropriate charge for thecircuit as shown on the unit nameplate. If partial charging is re-quired, operate circuit at full load and use an accurate tempera-ture sensor on the liquid line as it enters the filter drier. Use theTemperatures mode on the scrolling marquee display to showthe circuit saturated condensing temperature (Tempera-turesCIR.ASCT.A) or (TemperaturesCIR.BSCT.B). Charging is most accurate at saturated discharge tem-peratures of 120 to 125 F (49 to 52 C). Block condenser airflowas required to reach this temperature range. Add refrigerant un-til the system subcooling (SCT.A or SCT.B minus liquid linetemperature entering EXV) is approximately 15 to 17 F (–9.4to –8.3 C). Refrigerant VAPOR only may be added to a circuitthrough the 1/4-in. suction Schrader connection on the suctionline.Charge Adjustment for Brine Operation —For 30RAP010-060 units, the 30RAP chiller does not require amedium temperature brine modification at any temperaturewithin the chiller application range which is as low as 14 F(–10 C) leaving fluid temperature.For 30RAP070-150 units with MCXH condenser, see Table20 for proper change adjustment. For 30RAP070-150 unitswith RTPF condenser, no charge adjustment is needed.Operating LimitationsCOOLER FLOW RATES AND LOOP VOLUMES —Refer to Table 21 for minimum and maximum cooler flowrates. Refer to Table 22 for minimum fluid volume require-ments.TEMPERATURES (See Table 23 for 30RAP standard tem-perature limits).Table 20 — Charge Adjustment for Brine OperationCAUTIONNever charge liquid into low-pressure side of system. Donot overcharge. Overcharging results in higher dischargepressure, possible compressor damage, and higher powerconsumption. During charging or removal of refrigerant, besure water is continuously circulating through the cooler toprevent freezing.CAUTIONDo not operate with cooler leaving chiller water (fluid)temperature (LCWT) below 40 F (4.4 C) for the standardunits, or below 15 F (–9.4 C) for units factory built formedium temperature brine.Charge to be Removed from Brine Operation (lb)070 080 090 100 115 130 150Leaving BrineTemperature Ckt A Ckt B CktA Ckt B Ckt A Ckt B Ckt A Ckt B Ckt A Ckt B Ckt A Ckt B Ckt A Ckt B44F-35F No Change is Needed34F-15F 0.8 1.1 1.1 1.1 1.1 1.1 1.1 2.0 2.0 2.0 2.0 3.0 3.0 3.0