Carrier EVERGREEN 23XRV Product Data

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24Variable Speed Screw ChillerHVAC Guide SpecificationsSize Range: 300 to 550 Tons (1055 to 1934 kW)NominalCarrier Model Number: 23XRVPart 1 — General1.01 SYSTEM DESCRIPTIONA. Microprocessor-controlled liquid chiller shall use asemi-hermetic screw compressor using refrigerantHFC-134a only. Chiller refrigerant shall not have aplanned phase out date.B. If a manufacturer proposes a liquid chiller usingHCFC-123 refrigerant, which has a planned phaseout date, then the manufacturer shall include in thechiller price:1. A vapor activated alarm system consisting of allalarms, sensors, safeties, and ventilation equip-ment as required by ANSI/ASHRAE Standard15 Safety Code for Mechanical Refrigeration(latest edition) with the quotation. System shallbe capable of responding to HCFC-123 levelsof 10 ppm Allowable Exposure Limit (AEL).2. A free-standing refrigerant storage tank andpumpout unit shall be provided. The storagevessels shall be designed per ASME Section VIIIDivision 1 code with 300 psig (2068 kPa)design pressure. Double relief valves per ANSI/ASHRAE 15, latest edition, shall be provided.The tank shall include a liquid level gage andpressure gage. The pumpout unit shall use asemi-hermetic reciprocating compressor withwater cooled condenser. Condenser water pip-ing, 3-phase motor power, and 115-volt controlpower shall be installed at the jobsite by theinstalling contractor.3. Zero emission purge unit capable of operatingeven when the chiller is not operating.4. Back-up relief valve to rupture disk.5. Factory-installed chiller pressurizing system toprevent leakage of noncondensables into thechiller during shutdown periods.6. Plant room ventilation.7. Removal and disposal of refrigerant at the endof the phase out period.8. Chillers utilizing a purge unit shall include in themachine price the costs to perform the follow-ing regular maintenance procedures:a. Weekly: Check refrigerant charge.b. Quarterly: Charge purge unit dehydrator atleast quarterly, more often if necessary.Clean foul gas strainer. Perform chemicalanalysis of oil.c. Annually: Clean and inspect all valves. Drainand flush purge shell. Clean orifices.1.02 QUALITY ASSURANCEA. Chiller performance shall be rated in accordancewith AHRI Standard 550/590, latest edition.B. Equipment and installation shall be in compliancewith ANSI/ASHRAE 15 (latest edition).C. Cooler and condenser refrigerant side shall includeASME “U” stamp and nameplate certifying compli-ance with ASME Section VIII, Division 1 code forunfired pressure vessels.D. A manufacturer’s data report is required to verifypressure vessel construction adherence to ASMEvessel construction requirements. Form U-1 asrequired per ASME code rules is to be furnishedto the owner. The U-1 Form must be signed by aqualified inspector, holding a National BoardCommission, certifying that construction conformsto the latest ASME Code Section VIII, Div. 1 forpressure vessels. The ASME symbol “U” must alsobe stamped on the heat exchanger. Vessels specifi-cally exempted from the scope of the code mustcome with material, test, and construction methodscertification and detailed documents similar toASME U-1; further, these must be signed by an offi-cer of the company.E. Chiller shall be designed and constructed to meetUL and UL of Canada requirements and have labelsappropriately affixed.F. Unit shall be manufactured in a facility registered toISO 9001:2000 Manufacturing Quality Standard.G. Each compressor assembly shall undergo a mechan-ical run-in test to verify vibration levels, oil pressures,and temperatures are within acceptable limits. Eachcompressor assembly shall be proof tested at a mini-mum 204 psig (1407 kPa) and leak tested at185 psig (1276 kPa) with a tracer gas mixture.H. Entire chiller assembly shall be proof tested at204 psig (1407 kPa) and leak tested at 185 psig(1276 kPa) with a tracer gas mixture on the refriger-ant side. The leak test shall not allow any leaksgreater than 0.5 oz per year of refrigerant. Thewater side of each heat exchanger shall be hydro-statically tested at 1.3 times rated working pressure.I. Prior to shipment, the chiller automated controlstest shall be executed to check for proper wiring andensure correct controls operation.J. Chillers shall have factory-mounted, factory-wiredand factory-tested unit-mounted variable frequencydrive (VFD). Proper VFD operation shall be con-firmed prior to shipment.1.03 DELIVERY, STORAGE AND HANDLINGA. Unit shall be stored and handled in accordance withmanufacturer’s instructions.B. Unit shall be shipped with all refrigerant piping andcontrol wiring factory-installed.C. Unit shall be shipped charged with oil and fullcharge of refrigerant HFC-134a or a nitrogen hold-ing charge as specified on the equipment schedule.Guide specifications