Air Cooled Water Chillers - Birso Soğutma
Product manual302 B - 98/04 ADate: April 1998Supersedes: noneAir cooled water chillershigh ambientALR HA 120.2 455.4cooling capacity from 404 to 1410 kW50 Hz - refrigerant: HCFC 22, HFC 407C, HFC 134a
ALR HA - Air cooled water chillersThe newly redesigned McQuay ALR HA (high ambient temperature) air cooled water chillers offer you unsurpassedefficiency, flexibility, reliability, and serviceability in a totalpackage concept. Improved to include the latest heattransfer surface design and the most advanced and efficientreciprocating compressors in the industry, the redesignedALR HA chillers exceed efficiency requirements. TheMcQuay air cooled water chillers are completely factoryassembled, piped, wired and shipped in one piece, readyfor installation. Each unit consists of compressors, insulatedevaporator, condenser coils with independent subcoolercircuits, multiple propeller type direct drive condenser fanswith independent fan motors, heavy-gauge weatherproofcasing and weatherproof electrical control centre containingall necessary and operating controls and motor startingequipment.Highly flexible designThe ALR HA units is available in 26 sizes covering a rangefrom 404 to 1410 kW nominal cooling capacity with coolanttemperature between 10 C and -8 C. Many optional features can be added to fit all installation requirements.Low installation costsThe complete assembly of the units and function testing atthe factory reduces the cost of installation on site. A rigidsteel base distributes the weight of the unit to the supportpoints and allows simple installation by an easy access tothe lifting points. The units are designed with a single pointthree-phase mains connection. All units are suppliedcomplete with refrigerants HCFC 22, HFC 407C or HFC134a.of the base and this facilitates the arrangement of the unit’sbases and the support structures. The electrical and controlequipment is located inside cubicles which can be accessedby key locked doors complete with door interlocking on thepower cabinet.Semi-hermetic compressorsCompressors are reciprocating type 4, 6 or 8 cylinders withsuction and discharge valves of the disc type. The forced lubrication is obtained through a reversible gear type pump.The oil heater is automatically switched on when the compressor stops to prevent oil dilution from liquid refrigerantand in order to keep the right fluidity. The electrical motorsare protected against thermal over load through thermistorsembedded in each of the three phases of the statoricwindings. The ALR HA units, are equipped with McQuay800 and 900 S compressors.EvaporatorThe evaporator is a direct expansion shell-and-tube typewith water flowing in the baffled shell side and refrigerantflowing through the tubes. The ALR HA evaporator are designed in more separate refrigerant circuits, one for eachcompressor. The evaporator is manufactured with a carbonsteel shell and seamless high efficiency copper tubes. Rollexpansion anchors the refrigerant tubes in the heavy carbon steel tube sheet. Water baffles are polypropylene to resist corrosion. Refrigerant head is in carbon steel and is removable to permit access to the tubes. The evaporator iswrapped with closed-cell heat insulation.Condenser coilsThe microprocessor safety and control system allows thetrouble shootingof any type of functional anomaly,enabling simpler, safer and timely intervention by the unitmaintenance personnel. The oil heater in the sump on eachcompressor and a complete set of controls and safetydevices protect the unit from abnormal operating conditions.The new ALR HA units are constructed with internally enhanced seamless copper tubes arranged in a staggered rowpattern and mechanically expanded into McQuay lancedand rippled aluminium condenser fins with full fin collars.An integral subcooling circuit provided sufficient sub coolingto effectively eliminate liquid flashing and increases in cooling capacity up to 8% without increasing in absorbedpower.Code requirementsCondenser coil fansAll units are designed and manufactured in accordance withapplicable selections of the following which are equivalentto American Air-conditioning industry applicable codes:Rating of chillers: UNI 9018Construction of pressure vessel: TÜV Standards (optional)Electrical codes: IEC 204-1 CEI 44-5 Elect. & Safety CodesSafety Codes: CEI-EN 60204-1 CodesManufacturing Quality Stds: ISO 9001The condenser fans are of the helical type with wing-profileblades to achieve a better performance. The direct couplingwith the electrical motor eliminates any problems as regardsthe application of transmission devices and reduces the vibrations caused by the functioning. The motors are suppliedas standard totally enclosed (Insulation class F) and are ofthe three-phase type; they are protected againstoverloading and short circuits by circuit breakers located inside the electrical control panel. The fans operate informed bell shaped orifices.Low maintenance costsFactory testingEach unit is pressure tested, evacuated and charged withthe refrigerant requested. It is then tested at the factory’stest bench under the design conditions specified by thecustomer. Upon request, a second series of tests can becarried out witnessed by the customer (see option 92).Before shipment, each unit is re-checked for pressure andrefrigerant charge control.General characteristicsCabinet and structureThe cabinet is made of galvanized steel sheet and paintedto provide a high resistance to corrosion. The unit baseframe has holes to lift the unit with ropes for an easy installation. The weight is uniformly distributed along the profiles302 B - 98/04 A - page 2/28Electrical control panelThe components of both the power and the control are splitinto two sections of one main panel, accessed by individualkey locked doors to prevent unauthorised entry. The panelis manufactured to insure protection in all weather conditions and the doors are fitted with door-stays to prevent accidental closure. The power panel is fitted with a door interlocked mains isolator to prevent access while it is live.Power section includes: This section of the panel includescontactors, all the fuses for the compressors and thecondenser fans, control circuit transformer. Additional spaceis provided for the installation of the various optional accessories provided to enhance the capabilities of the ALR HAunits.Control section includes: Microprocessor is installed as
standard on all the units. Its touch sensitive keypad consistsof keys that can be used to alter unit set points and controlcommands. A display on two lines illustrates the machine'soperating status & programable parameters (setpoints) e.g.temperatures & pressures of fluids (water, refrigerant)controller maximise the McQuay chillers energy efficiencyand reliability characteristics. It uses sophisticated softwarewith predictive logic to select the most energy efficient combination of compressor, condenser fan to maintain stableoperating conditions and maximise energy efficiency. Thecompressors are automatically rotated to ensure equal operating hours. Controller intervenes to protect critical components in response to external signals from its system sensors measuring: motor temperatures, refrigerant gas and oilpressures, electrical supply and evaporator.Refrigerant circuitThe ALR HA units are equipped with a complete refrigerantcircuit charge HCFC22, HFC407C or HFC134a. The circuitconsists of insulated copper pipes on the suction line and iscomplete with filter driers, moisture indicators, liquid sightglass, thermostatic expansion valves.Acoustic optionsTwo versions are available. ALR HA ST (Standard) ALR HA CN (Compressor noise) for a reduced sound level this unit is fitted with sound proofing cabinets around thecompressors insulated with absorbent acoustic material.Accessories and Options07. Double set point version (CB) - Dual leaving glycolmixture temperature setpoints. The lower setpoint can godown to -8 C.11. Compressor thermal overload relays - Safety devicesagainst compressor motor overloading in addition to thenormal protection envisaged by the electrical windings.15. Phase monitor - The phase monitor controls thevoltage values on the supply line stopping the unit when thecalibration threshold is reached ( 10%). This safety deviceis automatically reset.16. Ammeter and voltmeter - Digital meters of unit drawnamperes and voltage values, installed on the electricalcontrol panel.17. Condenser power factor correction - Installed on theelectrical control panel to ensure it conforms to the plantrules. (McQuay advices maximum 0,9).18. 110 Volt control circuit - The 110 Volt control circuitare supplied by an appropriate current transformer installedon the electrical control panel.21. Main Switch22. Transformer - Transformer for auxiliary circuit.32. Condenser coil guards - Metal protection guards fixedon all the external surface of the condenser coils.33. Compressor guards - To prevent unauthorised accessto the cooling unit components.34. Cu-Cu condensing coils - To give better protectionagainst corrosion by aggressive environments.35. Cu-Cu-Sn condensing coils - To give better protection against corrosion in aggressive environments and bysalty air.36. Alucoat condensing coils - Fins are protected by aspecial epoxy paint with a high resistance to corrosion.42. Flow switch - Supplied separately to be wired andinstalled on the evaporator water piping (by the customer).60. Suction shut-off valve - Suction shut-off valve installedon the suction port (STD on HFC 134a & HFC407C).61. Gauges - Gauges to control high and low gas pressureand lubricant oil pressure.70b. MicroTech - Microprocessor (only for two circuit).80. Spreader bars - Facilitate the lifting of the units keepingthe ropes away from the unit's casing.82. Wooden box packing - Self-supporting wooden boxinternally insulated and suitable for shipment by sea.83. Open Cage packing - Protection with polythene andwooden cage for transport and protection before theinstallation.84. Rubber type antivibration mounts - Suppliedseparately, these are positioned under the base of the unitduring installation. Ideal to reduce the vibrations when theunit is floor mounted.85. Spring type antivibration mounts - Suppliedseparately, these are positioned under the base of the unitduring installation. Ideal for dampening vibrations for installation on roofs and metallic structures.88. TUV approval - If required, the cooling units can beTUV tested and certified.92. Witness tests - The units are normally tested at thetest bench prior to the shipment. On request, a second testcan be carried out, at customer’s presence, in accordancewith the procedures indicated on the test form.Selection ProceduresThe procedure for selecting the cooling duty and the powerabsorbed by the compressors of the ALR HA units isindicated below.1. The tables “Standard ALR HA unit performance” allow todetermine the cooling capacity, power absorbed by thecompressor motors with cooled water temperatures between 4 C and 9 C, ambient air temperatures between 25 C and 52 C.2. Although the data can be interpolated, extrapolation is notpermitted. For conditions other than those shown in thetables, contact McQuay Product Group.3. The performance of the ALR HA units refers to 5 C of tof chilled water. The increase or reduction of the flow rate ofchilled water produces a reduction and an increase in thecooling performance which is negligible. To ensure thecorrect functioning of the exchanger, it is advisable tomaintain the water’s t within 3 C 6 C.4. The performance figures are based on Fouling factor of0.044 m2 C/kW. In the event of different values, thecorrection coefficients indicated in Table 2 should be used.5. The performance is influenced by air density. Table 3gives the correction factors for the various altitudes abovesea level.6. The power absorbed values given in the standardperformance tables refer to the compressors only. The302 B - 98/04 A - page 3/28
current absorbed by the fans is given in the electricalcharacteristics table.8. To obtain the flow resistance through the evaporator, usethe diagrams on page 9.the temperature of the compressor motor’s stator due to theinrush current during the start-up. To prevent damage to thecompressors, McQuay has envisaged the application of adevice to limit frequent stops and restarts.During the span of one hour there will be no more than 6starts of the compressor. The plant side should thereforeensure that the overall water content allows a more constantfunctioning of the unit and consequently greaterenvironmental comfort. The minimum installation water content envisaged should be calculated with a certainapproximation using this formula:Example of selection of an ALR HA unitData:Cooling capacity required: 650 kWAmbient air temperature: 46 CTemperature of cooled water: from 12 to 7 CRefrigerant: HCFC22(1) Q P x p25Fouling factor: 0.132 m2 C/kWAltitude above sea level: 900 mwhere:Glycol content: noneQ minimum content of the plant expressed in litres.1. The cooling capacity correction coefficient for fouling0.132 m2 C/kW (Table 2) is 0.975.P cooling capacity of the plant expressed in W2. The cooling capacity correction coefficient for installationat 900 m above sea level (Table 3) is 0.979.A plant with a 445 kW cooling capacity in which the coolingunit ALR 120.2 ST 022 equipped with two compressors isapplied, should have a minimum content of water calculatedon the basis of the minimum cooling capacity, which for thistype of equipment is 25% of the nominal capacity.p minimum unloading capacity percentage3. The corrected cooling capacity is650 kW/0.975/0.979 681 kW.4. The cooling unit to satisfy this capacity is ALR HA 230.2ST 022. This unit will have the following operating data:Cooling capacity:684 kW x 0.975 x 0.979 652,9 kWPower absorbed by compressors:243,1 kW x 0.986 x 1.015 243,3 kW.Chilled water flow rate: 652,9 kW/4.186/(12-7) 31,2 l/s.Pressure drop indicated by the diagram on page 9 with acooled water flow of 31,2 l/s on the straight linecorresponding to the unit ALR HA 230.2 we find a pressuredrop of 32 kPa.Q 445000 x 0.25 4450 l25For a more accurate determination of the quantity of water,it is advisable to contact the designer of the plant.When thesum of the water content of the evaporator, the pipes of thehydraulic circuit and the terminals (coils, exchangers, etc.) islower than the value obtained, it would be better to opt for aALR McQuay cooling unit equipped with inertial tank(optional).Table 2 - Fouling factorWater content in cooling circuitsThe cooled water distribution circuits should have aminimum water content to avoid excessive intermittentoperation of the compressors. In fact, each time thecompressor starts up, an excessive quantity of oil goes fromthe compressor’s sump and simultaneously there is a rise inFoulingfactorm2 C/kW0,044Cooling capacitycorrectionfactor1,000Power 90,939Table 1 - Operating limitsHCFC 22Max ambient temperatureMin ambient temperatureMax entering evap. water temp. (without glycol)Min leaving evap. water temp. (without glycol) C C C CSTCNSTHFC 407CCNSTHFC 134aCN525154525154525156525156525154525154Table 3 - Altitude correction factorElevation above sea level (m)Barometric pressure Cooling cap. correction factorPower input correction 31,0210,9671,0260,9601,031302 B - 98/04 A - page 4/28
Installation notesHandlingAll moving and handling may damage the unit if someconditions are not scrupulously observed. The units shouldbe lifted with a crane using long ropes anchored to theholes on the frame of the unit’s base and by using the upperspacer bars (see accessory 80) to prevent the ropes fromdamaging the condenser coils.LocationThe ALR units are produced for outside installation onroofs, floors or below ground level on condition that the areais free from obstacles for the passage of the condensationair. The unit should be positioned on solid foundations andperfectly level; in the case of installation on roofs or floors, itmay be advisable to arrange the use of suitable weightdistribution beams. When the units are installed on theground, a concrete base at least 250 mm wider and longerthan the unit’s footprint should be laid. Furthermore, thisbase should be sufficiently robust to withstand the unitweight mentioned in the technical data table. When theunits are positioned in areas which are easily accessible bypersons or animals, it is advisable to fit guards to protectthe condenser coil guards (see accessory 32) and, whennecessary, also guards to protect the compressor (seeaccessory 33).Space requirementsThe ALR HA units are air-cooled, hence it is important toobserve the minimum distances which guarantee the bestventilation of the condenser coils. Limitations of space re-ducing the air flow could cause significant reductions incooling capacity, an increase in electricity consumption and,in some cases, the unit may stop functioning as a result ofthe high condensation pressure. The fans do not allow theuse of ducts which have high flow resistance, hence isshould be ensured that the output air cannot recycle itselfinside the condenser coils. The units should be positionedsuch that there is sufficient distance between the coils andany obstacles to improve ventilation and also to facilitate inspection. When two or more units are positioned side byside it is recommended that the condenser coils are at least3000 mm distance from one another. Smaller distancescould cause the recirculation of hot air. If the units arepositioned in places surrounded by walls or obstacles of thesame height as the units, the units should be at least 3000mm from said obstacles. For other installation solutions,consult McQuay technicians.Acoustic protectionThe low noise levels of the ALR units means that they meetmost of the most restrictive regulations, thanks to theavailability of two versions with different sound levels: thestandard version (ST), the version with sound proofing cabinet on compressors (CN). When the noise level must meetspecial requirements it will be necessary to pay themaximum attention to ensure the perfect insulation of theunit from the support base by applying appropriate vibrationdampening devices (see accessories 84 and 85), applyingvibration-dampening mounts on the water pipes and on theelectrical connections.NomenclatureALR HA 200.2 ST 022Air cooled water chillerHigh ambient temperatureSize:200TonNo. of compressor 234Version:STCNStandard versionSound proofing cabinets on compressorsRefrigerant:022407134HCFC 22HFC 407CHFC 134a302 B - 98/04 A - page 5/28
Physical data ALR HA ST, CN 120.2 235.3"ALR HA ST, CN " Unit size120.2135.2145.2161.2171.2Cooling capacity (HCFC 22) (1)Power input (HCFC 22) ,9206,5Cooling capacity (HFC 407C) (1)Power input (HFC 407C) (1)Cooling capacity (HFC 134a) 09,9520,1196,7321,3542,1206,5359,390,9904 8062100,8806 8062108,4806 9062121,7906 9062125,6906 8082kgStd.34 34434 34437 37437 37437 424Opt.56666Power input (HFC 134a) (1)kWMcQuay compressorNo./SeriesNo. of refrigerant circuitRefrigerant charge HCFC 22No. of reduction stepsCondenser fansNo. / Nominal powerTotal air 5816No. of evaporator/Water volumeMax operating pressureCondenser coilCoil typeWeightOperating weight (ALR ST)Lanced fins - Internally spiral wound tubeskg36673798436243724520Shipping weight (ALR ST)Operating weight (ALR CN) (2)Shipping weight (ALR CN) 16,2564,2216,2382,4135,2808 8082627,4222,6608,6222,6409,0145,3808 9082657,6231,2637,9231,2435,6155,4908 9082705,2246,3684,0246,3479,4151,5908 9082775,5287,0752,2287,0478,0166,42x906 8063kgStd.Opt.42 424650 524652 524652 524637 37 346-"ALR HA ST, CN " Unit sizeCooling capacity (HCFC 22) (1)kWPower input (HCFC 22) (1)kWCooling capacity (HFC 407C) (1) kWPower input (HFC 407C) (1)kWCooling capacity (HFC 134a) (1) kWPower input (HFC 134a) (1)kWMcQuay compressorNo./SeriesNo. of refrigerant circuitRefrigerant charge HCFC 22No. of reduction stepsCondenser fansNo. / Nominal powerTotal air flowEvaporatorNo. of evaporator/Water volumeMax operating pressureCondenser il typeWeightOperating weight (ALR ST)Lanced fins - Internally spiral wound tubeskg46684873488249006340Shipping weight (ALR ST)Operating weight (ALR CN) (2)Shipping weight (ALR CN) 2005050606167906511Note: (1) Nominal cooling capacity and power input are based on: 12/7 0C entering/leaving evaporator water temperature;46 0C ambient temperature.(2) CN version is the ST one with the sound proof enclosure on the compressors.302 B - 98/04 A - page 6/28
Physical data ALR HA ST, CN 251.3 365.4"ALR HA ST, CN " Unit size251.3261.3270.3286.3290.3Cooling capacity (HCFC 22) (1)Power input (HCFC 22) ,3341,1Cooling capacity (HFC 407C) (1)Power input (HFC 407C) (1)Cooling capacity (HFC 134a) 50,5865,7327,3573,6929,6341,1600,2Power input (HFC 134a) (1)kWMcQuay compressorNo./SeriesNo. of refrigerant circuit185,83x9063183,62x906 8083193,2808 906 8083202,83x8083213,02x808 9083kgStd.37 37 37637 37 42642 42 37642 42 42642 50 526Opt.-----Refrigerant charge HCFC 22No. of reduction stepsCondenser fansNo. / Nominal Coil typeWeightOperating weight (ALR ST)kg63426495663667847070Shipping weight (ALR ST)Operating weight (ALR CN) (2)Shipping weight (ALR CN) g capacity (HCFC 22) (1)kWPower input (HCFC 22) (1)kWCooling capacity (HFC 407C) (1) kWPower input (HFC 407C) (1)kWCooling capacity (HFC 134a) (1) kWPower input (HFC 134a) (1)kWMcQuay 2x908 01084,3413,0695,7241,63x906 8081128,5418,01096,0418,0718,7251,22x906 2x8081140,6422,71106,4422,7741,8260,9906 808x3No. of refrigerant circuitRefrigerant charge HCFC 22No. of reduction stepskgStd.352 52 426352 52 526437 37 42 428437 37 42 428437 42 42 1,3100,599,899,0Total air flowEvaporatorNo. of evaporator/Water volumeMax operating pressureCondenser coil"ALR HA ST, CN " Unit sizeCondenser fansNo. / Nominal powerTotal air flowm3/sEvaporatorNo. of evaporator/Water tOperating weight (ALR ST)kg70547328917393739573Shipping weight (ALR ST)Operating weight (ALR CN) ipping weight (ALR CN) (2)kg72097487922894289628Max operating pressureCondenser coilCoil typeNote: (1) Nominal cooling capacity and power input are based on: 12/7 0C entering/leaving evaporator water temperature;46 0C ambient temperature.(2) CN version is the ST one with the sound proof enclosure on the compressors.302 B - 98/04 A - page 7/28
Physical data ALR HA ST, CN 375.4 455.4"ALR HA ST, CN " Unit size375.4390.4405.4415.4430.4455.4Cooling capacity (HCFC 22) (1)Power input (HCFC 22) 41352,0480,21410,0492,6Cooling capacity (HFC 407C) (1)Power input (HFC 407C) (1)Cooling capacity (HFC 134a) 959,0Power input (HFC 134a) (1)kWMcQuay compressorNo./SeriesNo. of refrigerant circuit270,54x8084280,53x808 9084290,72x808 2x9084300,8808 3x9084310,94x9084303,04x9084Refrigerant charge HCFC 22No. of reduction stepsCondenser fansNo. / Nominal powerkgStd.42 42 42 42 42 42 50 52 42 42 52 52 50 52 52 52 52 52 52 52 52 52 52 1/524161/524161/524161/524161/52416Coil typeWeightOperating weight (ALR ST)kg965399229922102201022010300Shipping weight (ALR ST)Operating weight (ALR CN) (2)Shipping weight (ALR CN) 96108201029696961082010296108241090010376Total air flowEvaporatorNo. of evaporator/Water volumeMax operating pressureCondenser coilNote: (1) Nominal cooling capacity and power input are based on: 12/7 0C entering/leaving evaporator water temperature;46 0C ambient temperature.(2) CN version is the ST one with the sound proof enclosure on the compressors.302 B - 98/04 A - page 8/28
evaporatorWater pressure dropALR HA 286.3 - 290.3ALR HA 215.2 - 230.2ALR HA 145.2 - 235.3ALR HA 161.2ALR HA 171.2 - 185.2 - 200.2ALR HA 135.2ALR HA 120.2ALR HA 270.3 - 311.3ALR HA 251.3 - 261.3ALR HA 325.3ALR HA 390.4 - 405.4 - 415.4ALR HA 345.4 - 355.4 - 365.4 - 375.4ALR HA 430.4 - 455.410090807060Pressure drop (kPa)5040302010678 9 102030405060 70 80 90100140Water flow rate (l/s)302 B - 98/04 A - page 9/28
Electrical data ALR HA ST, CN 120.2 455.4(HCFC 22, HFC 407C)"ALR HA ST, CN" Unit size120.2135.2145.2161.2A277,0310,0Max bigger compressors inrush currentAbsorbed current fansMax unit absorbed ,4620,038,4394,4750,038,4426,4Max unit inrush 0.2235.3"ALR HA ST, CN" Unit size400 V - 3f - 50 Hz (1)333,0356,0171.2Standard voltageMax absorbed current compr. (FLA) (2)388,0Standard voltageMax absorbed current compr. (FLA) (2)A420,0445,0400 V - 3f - 50 Hz (1)470,0470,0511,0Max bigger compressors inrush currentAbsorbed current fansMax unit absorbed ,0750,057,6527,6620,057,6568,6Max unit inrush 23,61136,4400 V - 3f - 50 Hz 3,6"ALR HA ST, CN" Unit sizeStandard voltageMax absorbed current compr. (FLA) (2)Max bigger compressors inrush currentAbsorbed current fansMax unit absorbed currentMax unit inrush currentAAAAA"ALR HA ST, CN" Unit sizeStandard voltageMax absorbed current compr. (FLA) (2)Max bigger compressors inrush currentAA680,0750,0705,0750,0400 V - 3f - 50 Hz (1)744,0750,0Absorbed current fansMax unit absorbed currentMax unit inrush 329,6"ALR HA ST, CN" Unit size375.4390.4Standard voltage405.4415.4430.4455.4400 V - 3f - 50 Hz (1)Max absorbed current compr. (FLA) (2)Max bigger compressors inrush currentAbsorbed current 15,0750,096,0940,0750,096,0940,0750,0115,2Max unit absorbed currentMax unit inrush 87,01036,01512,01055,21512,0Note: (1) Allowed voltage tolerance 10%.(2) Absorbed current max condition.302 B - 98/04 A - page 10/28
Electrical data ALR HA ST, CN 120.2 455.4(HFC 134)"ALR HA ST, CN" Unit size120.2Standard voltageMax absorbed current compr. (FLA) (2)AMax bigger compressors inrush currentAbsorbed current fansMax unit absorbed currentAAAMax unit inrush currentA"ALR HA ST, CN" Unit size135.2145.2182,0220,0400 V - 3f - 50 Hz andard voltageMax absorbed current compr. (FLA) (2)A310,0310,0400 V - 3f - 50 Hz (1)310,0310,0330,0Max bigger compressors inrush currentAbsorbed current fansMax unit absorbed ,0750,045,6355,6620,045,6375,6Max unit inrush 61000,4400 V - 3f - 50 Hz 5.4465,0750,060,8400 V - 3f - 50 Hz (1)485,0750,060,8530,0750,060,8575,0750,060,8"ALR HA ST, CN" Unit sizeStandard voltageMax absorbed current compr. (FLA) (2)Max bigger compressors inrush currentAbsorbed current fansMax unit absorbed currentMax unit inrush currentAAAAA"ALR HA ST, CN" Unit sizeStandard voltageMax absorbed current compr. (FLA) (2)Max bigger compressors inrush currentAbsorbed current fansAAAMax unit absorbed currentA518,2525,8545,8590,8635,8Max unit inrush currentA1095,51100,51125,51170,61215,6"ALR HA ST, CN" Unit size465,0750,053,2375.4Standard voltageMax absorbed current compr. (FLA) (2)Max bigger compressors inrush currentAA620,0750,0Absorbed current fansMax unit absorbed currentMax unit inrush 750,0400 V - 3f - 50 Hz ,21272,076,0696,01272,0Note: (1) Allowed voltage tolerance 10%.(2) Absorbed current max condition.302 B - 98/04 A - page 11/28
Sound pressure level ALR HA ST 120.2 455.4Sound pressure level at 1 m from the unit in free fieldALR HA STNote:(rif. 2 x 10 -5)Unit size63 Hz125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 6,072,070,584,0251.377,579,580,581,580,076,
ALR HA - Air cooled water chillers 302 B - 98/04 A - page 2/28 The newly redesigned McQuay ALR HA (high ambient tem-perature) air cooled water chillers offer you unsurpassed efficiency, flexibility, reliability, and serviceability in a total package concept. Improved to include the latest heat transfer surface design and the most advanced and .
cause water-cooled chillers can take advantage of lower condensing temperatures than air-cooled chillers. Air-cooled chillers have a full load kW/ton of approxi-mately 1.25 while water-cooled chillers have a full load kW/ton of between 0.55 and 0.8 kW/ton. The kW draw of the cooling tower fans and con-denser water pump should be
Air Cooled Chiller Air Air 2 Air Air 6 AIR COOLED CHILLERS Air-cooled chillers are refrigeration machines that remove heat from cooling loads using chilled water and reject this heat into the atmosphere using refrigerant. THEY ALL HAVE fans, condenser coils, and compressors. Air-cooled chillers are used to provide cooling for human comfort and electronic equipment as well as industrial process .
Maximum Series portable chillers can be used on a variety of process applications that require 20 F to 80 F chilled water. MAXIMUM SERIES † Air & Water-Cooled † 1/4 to 40 Tons † 20 F to 80 F † Using Non-Ozone Depleting Refrigerants 10 ton air-cooled model 10 ton water-cooled model 2 ton water-cooled model 1 ton air-cooled model
8 to 12 F for water-cooled chillers and 10 to 15 F for air-cooled chillers. ENSURE PROPER SUPERHEAT For air-cooled chillers, make sure fans work properly and coils are clean on the condenser side of the system. For water-cooled chillers, ensure that all flow rates and pressure drops on th
AIR-COOLED Air-Cooled chillers utilize plant ambient air to extract heat from the refrigeration circuit. Fan or blowers move the plant air across generously sized finned condenser coils to permit full rated capacity at design conditions. WATER-COOLED Water-Cooled chillers utilize a secondary plant water source such as cooling tower or city .
air-cooled, water cooled and split systems scroll, screw, or oil free centrifugal compressors precise capacity control & redundancy tanks, pumps and free-cooling modules advanced microprocessor controls highest quality modular chillers air & water cooled chillers for hvac & process cooling. 2
Air-cooled chillers are used to produce chilled water to air-side systems such as primary air fan coil systems, constant air volume systems and variable air volume systems in different zones of the building. An air-cooled screw chiller generally comprises a shell and tube evaporator, an air-cooled condenser with
the transactions are difficult to discern. This makes it difficult to determine the overall size of activity and to know what the fair price is for a particular technology. And, of course, in highly inefficient markets a good deal of potentially valuable trade in innovation does not occur. The costs are so high and the potential value so difficult to perceive that innovation often sits “on .
