m.03 chillers - vn - zuellig

8/12/2019 M.03 Chillers - VN - Zuellig

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CHILLERS

The English language version prevails. u tin ti ng Anh khi c tranh ci.

Zuellig Page 1 of 13 of M.03 10 February 2014

CHILLERS MY LM L NH N C

1 GENERAL 1 T NG QUT

1.1 FUNCTIONAL DESCRIPTION 1.1 M T

The chillers scope of work covers water-cooledchillersProvide centrifugal type chillers/ suitable for variableprimary flow application, with variable speed driveson the impellers for soft starting as well as varyingcapacity.Variable speed drives to be suppliedequipped with harmonic suppression filters to meetIEE519

Ph m vi cng vi c bao g m cc my lm l nh gi inhi t n c.Cung c p my lm l nh ki u ly tm ho c tr c vtph h p cho ng d ng l u l ng s c p thay i,v i b i u t c cho bnh cng tc kh i ngm m c ng nh thay i cng su t. B i u khi nbi n t ng c l p t v i b l c song hi theoIEE519

1.2 CROSS REFERENCES 1.2 THAM CHI U CHOGeneralComply with the General Requirementsworksection.

T ng qutPh h p v i ch ngNh ng yu c u chung.

Related worksectionsRefer to the following worksections:Mechanical Piping, Mechanical piping insulation, AirConditioning Equipment, Mechanical Controls,Switchboards., Motor Starters

Nh ng ch ng lin quanTham chi u n cc ch ng sau:H th ng ng ng c kh, Cch nhi t ng ngc kh, H th ng thi t b x l khng kh, H th ng

i u khi n c kh, T i n, Kh i ng ng c .

1.3 STANDARDS 1.3 TIU CHU N

GeneralMicrobial control: To AS/NZS 3666.1 and therecommendations of SAA/SNZ HB32.Refrigeration systems: To AS/NZS 1677.2 and therecommendations of SAA HB40.1.Pressure vessels: To AS 1210.Electrical: To AS/NZS 3000.

T ng qutKi m sot vi khu n: AS/NZS 3666.1 v cc yu c utrong SAA/SNZ HB32.

H th ng lm l nh: theo AS/NZS 1677.2 v theokhuy n co c a SAA HB40.1.Bnh p su t : theo AS 1210.

C p i n: theo AS/NZS 3000.

1.4 SELECTION 1.4 L A CH N

Plant sizingEquipment shall be sized based on maximum peakload and building load profile, with sufficient capacityto maintain comfort conditions during periods ofrecorded climatic conditions and serving all the AHUswith one unit out of service.

Low load and part load considerations are required.Selection of chiller machine types and refrigerantsshall be in accordance with prevailing internationalprotocol, in addition to local code requirements.Chillers should be equipped with optimised circuits.

Tnh ton thi t bThi t b c tnh ton d a trn t i cao i m t i av t i l nh chi ti t ta nh, cng su t duy trtr ng thi khng kh tho i mi trong b t k i uki n th i ti t no v ph c v cho t t c cc AHUv i m t my khng ho t ng.

Yu c u my ch y c cc ch t i th p v t it ng ph n.Cc l a ch n ch ng lo i my v tc nhn l nh phh p theo cc quy nh qu c t ph bi n, v cc yuc u t i a ph ng.Chiller c trang b y cc m ch gas t i uho.

Standby CapacityMatching standby capacity shall extend to circulatingpumps and other auxiliaries.

Cng su t d phngCc b m tu n hon v cc ph ki n khc c ng ph ic cng su t d phng.

Chilled Water CircuitThe chilled water circuit configuration shall be withvariable volume speed pumps.

Chilled water flows are to vary based upon a

Vng tu n hon n c t i l nhC c u vng tu n hon n c t i l nh c trang bcc b m l u l ng c th thay i.

L u l ng n c t i l nh c thay i nh vo 1


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differential water pressure sensor, down to aminimum level for each chiller (nominally 20%).The volume of the chilled water loop shall beconsidered in the selection of the chiller. If the chilledwater loop volume is required to be increased, allowfor the necessary insulated buffer tank and associatedpipework, valves etc.

b c m bi n p su t n c khc nhau, xu ng t i m cth p nh t cho m i chiller (th ng l 20%).Th tch n c t i l nh trong vng tu n hon ccn nh c khi l a ch n chiller. Trong tr ng h p cyu c u th tch n c t i l nh trong vng tu n hont ng, nh th u ph i th c hi n cch nhi t cho bnh

m, ng ng, van ...Condenser Water CircuitThe condenser water circuit configuration shall bewith variable volume speed pumps.Condenser water flows shall be adjusted duringcommissioning and fixed at the optimum level forchiller operating efficiency.

Vng tu n hon n c ng ng tC c u vng tu n hon n c ng ng t c trang bcc b m l u l ng c th thay i.L u l ng n c ng ng t s c i u ch nh trongqu trnh nghi m thu v gi c nh m c t t nh tcho n ng su t ho t ng c a chiller.

PerformanceAllow for the chiller to perform as per the scheduledconditions.Offer a minimum COP as scheduled, withcompressor, control, oil pump and auxiliary heaterselectrical loads included.Alternatives (after a conforming offer has been made),are welcome for improved energy consumption.

Ho t ngChiller yu c u ho t ng theo ch ng trnh qui

nh.H s COP nh nh t ph i t yu c u, bao g m t icho my nn, h th ng i u khi n, b m d u v i ntr s i.Cc ph ng n khc (sau khi p ng cc yu c u

a ra) c u tin cho lo i ti t ki m n ng l ng.NoiseThe noise rating of the chiller should be no more than87dBA at 1 m from any direction of the chiller whenoperating at full load. Provide acoustic enclosures tothe compressors.

nn chiller khng v t qu 87dBA cch 1m t

chiller theo m i h ng trong i u ki n ho t ngy t i. Cung c p b bao che cch m cho my nn.

RefrigerantR407C or R410A.

Gas l nhR407C or R410A.

2 QUALITY 2 CH T L NG

2.1 PRE-COMPLETION TESTS 2.1 TH NGHI M TR C KHI HON T TType testsTo ARI 550/590.

Th nghi m m uTheo ARI 550/590.

Pressure testsStandard: To AS/NZS 1677.2.

Th nghi m p su tTiu chu n: theo AS/NZS 1677.2.

2.2 MINIMUM EFFICIENCY REQUIREMENT

Minimum efficiencies for centrifugal chillers or asotherwise scheduled

55.55 COP55.90 IPLV

2.2 YU C U HI U QU T I THI U I V IPHNG MY

Hi u qu t i thi u cho nh ng my lm l nh trungtm55.55 COP

55.90 IPLV

2.3 SUBMISSIONS 2.3 TRNH DUY T


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Submit product data for the chiller including,- Generic product data

- Chiller selection data sheet for the design conditions

- Acoustic performance- Certified dimension drawingsA statement from the manufacturers confirming theirchiller will operate when installed as described on thedrawings, or alternatively within the space available.

Trnh duy t ti li u k thu t c a chiller bao g m,- Ti li u k thu t chung

- Thng s ch n c a chiller theo i u ki n thi t k

- Thng s n- B n v kch th c c xc nh n.M t th kh ng nh c a nh s n xu t xc nh n r ngchiller c a h s ho t ng khi c l p t nh mt trn b n v , ho c cch khc trong ph m vi khnggian c s n.

3 MATERIALS 3 V T T

3.1 GENERAL 3.1 T NG QUAN

GeneralProvide proprietary chiller sets including components,accessories, internal power circuits, controls and

motor starters.

T ng quanCung c p chiller nguyn b mua s n bao g m ccb ph n, ph tng, m ch i n bn trong, h th ng

i u khi n, v b kh i ng ng c .Performance ratingTo ARI 550/590.

C p cng su tTheo ARI 550/590

Structure/ enclosureAir cooled chillers: Provide weatherproof sheet metalenclosures for equipment requiring weatherprotection.

C u t o v myChiller gi i nhi t gi: v my b ng t m kim lo ich u th i ti t cho cc thi t b t ngoi tr i .

Vibration isolatorsMount chiller on vibrations isolating mounts selectedand provided by the manufacturer.

Cch ly rung ngChn c a chiller t trn cc chn cch lyrung ng c l a ch n v cung c p b i nh s nxu t.

3.2 SHELL AND TUBE LIQUID COOLERS 3.2 BNH B C H I C THN N M NGANG

General

Type: Provide horizontal shell liquid coolersconsisting of a shell containing a tube bundle,refrigerant circuits, water drain and vent connections,insulation, and necessary valves and fittings. Theinsulation should be of FM approved and/or Class Atype, that is, having a flame spread of not more than25 and smoke developed rating of not more than 450as per either NFPA 255, ASTM 84-03, ANSUL/UL723 and UBC 8-1Performance rating: Rate to ARI 480.

T ng quan

Lo i: Cung c p lo i bnh b c h i c thn n mngang bao g m bnh ch a chm ng trao i nhi t,cc m ch gas, ng n c x v thot kh, cch nhi t,cc van v ph ki n c n thi t. Cch nhi t ph i ll ai ch p thu n b i FM v / ho c Class A, c tnhn ng chy la khng qu 25 v kh n ng t o khikhng l n h n 450 theo nh NFPA 255, ASTM 84-03, ANSUL/UL 723 v UBC 8-1C p cng su t: theo ARI 480

Direct expansion typeOperation: Refrigerant liquid evaporates within thetubes.

Refrigerant system: Arrange refrigerant circuits toprevent oil logging at the lowest operating refrigerantvelocity.Water baffles: Provide polypropylene or mild steelwater baffles securely fixed to the tube bundle orwelded to the shell, and incorporate pass partitionscomplementary to the water baffles so that the coolingeffect is distributed equally between all operatingtubes.

Lo i gin n tr c ti pV n hnh: gas l ng b c h i trong ng.

H th ng gas l nh: cc m ch gas c b trtrnh ng d u trong i u ki n v n t c gas v n hnhth p nh t.Vch ng n n c: cung c p lo i poly propylene ho cthp m m m b o g n ch t vo chm ng ho chn vo v bnh, v tch h p cc t m ch n pass vovch ng n n c phn b hi u qu trao i nhi t

ng u gi a cc ng.

Flooded typeOperation: Refrigerant liquid evaporates around thetubes.Refrigerant system: Submerge the tube bundle inliquid refrigerant and incorporate provision forcomplete separation of liquid droplets from leaving

Lo i ng p l ngV n hnh: gas l ng b c h i xung quanh ng.

H th ng gas l nh: lm ng p chm ng trong gasl ng v k t h p ch t ch vi c d phng cho s ng ncch hon ton cc gi t l ng v i h i ra. Khng nn

t chm ng trong kho ng 20% th tch gas l nh


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vapour. Do not place the tube bundle in the 20% ofthe refrigerant volume closest to the refrigerant outlet.

g n v i u ra c a gas l nh.

Construction

Shells: Hot rolled low carbon steel plate to AS 1548with seams precision electric welded and groundsmooth externally.Tube bundles: Unjoined seamless copper tube to AS1569 expanded into tube plates. Finish tubes flushwith the outside edge of the tube sheet. If necessary,provide intermediate tube supports along the length ofthe shell, to prevent sagging of the tubes. Prevent tubefrom vibrating against supports.

Tube plate material: Type 316 stainless steel toASTM A240/A240M.Fixing: Fix rigidly to support structures with either

- mounting feet incorporated in cradles welded tothe shell; or

- fixing straps, if recessed into cradles formed infactory-made mounting feet.

C u t o

Thn: thp t m cn nng hm l ng cacbon th ptheo AS 1548 s d ng m i hn i n chnh xc v bm t ngoi mi nh n.Chm ng: ng ng khng c m i hn n i lo itho c theo AS 1569 m vo t m gi ng. ngl p ph ng m t v i c nh ngoi c a t m gi ng. N uc n thi t, cung c p ng trung gian d c chi u dithn trnh s vng ng. Trnh lm rung ng t ccgi .

V t li u t m gi ng: Thp khng r lo i 316 theoASTM A240/A240M.L p: l p ch t theo cc k t c u b ng:

- Chn treo lin k t thnh khung hn vo thnbnh: ho c

- L p thanh gi ng, g n m vo khung t o b ichn lm t i nh my.

Water boxesGeneral: Provide removable water boxes for floodedtype coolers.Marine water boxes: Provide marine water boxes withremovable cover plates that permit access to tubeswithout disturbing the attached water piping.

H p n cT ng qut: cung c p cc h p n c c th d chchuy n cho bnh b c h i lo i ng p l ng.H p n c marine: cung c p cc h p n c marinev i t m che ph c th d ch chuy n cho php ti pc n cc ng gas m khng lm nh h ng ng n cg n vo.

AccessoriesRefrigerant connections: Seal after pressurising therefrigerant side with dry nitrogen.Water connections: Flanges to AS 2129 Table E.

Provide covers or caps.Freeze-up protection: Provide threaded connectionswith removable plugs for the insertion of a separatewell to hold the sensing bulb of a freeze-up protectionsafety cut-out.Thermometer pockets: Provide at water inlet andoutlet.

Water side pressure drop test sockets: Provide at inletand outlet. Factory test and provide metal tag statingwater cooler pressure drop at design water flow.

Ph ki nu n i ng gas: hn kn sau khi b m p l c bn

trong b ng nit kh.u n i ng n c: dng m t bch theo AS 2129

b ng E. Cung c p ch p v bao gi.B o v ch ng ng ng t : cung c p u n i ren c ntbt tho l p c g n cc u c m ng b o vch ng ng ng t .Ti l p nhi t k : l p t i cc u ng n c ra v ngn c vo.

Cc l th nghi m s t p pha c n c: l p t i ccu ra v u vo. Th nghi m t i nh my v cung

c p nhn kim lo i ghi s t p bnh lm l nh l ul ng thi t k .

3.3 LIQUID COOLER INSULATION 3.3 CCH NHI T BNH LM L NH

GeneralSelect from the following as specified in the

Mechanical pipingworksection.- Elastomeric foam.Minimum R value: To the Minimum R value tableintheMechanical piping insulationworksection.

T ng quanCh n t cc lo i sau nh qui nh trong ch ng H

th ng ng ng c kh.- V t li u: B t x p n h iGi tr R nh nh t: Xem B ng Gi Tr R Nh Nh ttrong ch ng H th ng ng ng c kh.

3.4 SHELL AND TUBE CONDENSERS 3.4 BNH NG NG NG N C N M NGANG

GeneralType: Provide horizontal water cooled, mechanicallycleanable refrigerant condensers with water flowingthrough the tubes, consisting of a shell containing atube bundle, refrigerant and cooling water circuits andnecessary valves and fittings.Performance rating: Rate to ARI 450.

T ng qutLo i: cung c p bnh ng ng n m ngang lm s ch gasl nh b ng c kh, gi i nhi t n c v i n c ch y qua

ng, bao g m 1 v ch a chm ng, gas l nh vvng tu n hon n c t i l nh v cc van c n thi tv my mc.

C p cng su t: theo ARI 450Construction C u t o


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Shells: Hot rolled low carbon steel plate to AS 1548with seams precision electric welded and groundsmooth externally.Tube bundles: Integral finned or enhanced seamlesscopper tubes to AS 1569 expanded into tube plates. Ifnecessary, provide intermediate tube supports alongthe length of the shell, to prevent sagging of the tubes.Prevent tubes from vibrating against supports.Tube plate material: Type 316 stainless steel toASTM A240/A240M.

Refrigerant storage: Size to take full refrigerantcharge on pump down.Fixing: Fix rigidly to suitable supports.

Thn: thp t m cn nng hm l ng cacbon th ptheo AS 1548 v i m i hn i n chnh xc v b m tngoi nh n.Chm ng: ng ng c ho c c vy ton b theoAS 1569 n ra trong cc t m ng. N u c n thi t,cung c p cc ng trung gian d c theo chi u div , trnh ng b vng. Ng n ng a ng kh i s rung

ng t cc gi .V t li u t m gi ng: thp khng r lo i 316 theoASTM A240/A240M.

S tch tr gas l nh: s p x p n p gas l nh ykhi b m ng ng.S c nh: l p ch c v i cc gi ph h p.

Water boxesGeneral: Provide removable water boxes.

Marine water boxes: Provide marine water boxes withremovable cover plates that permit access to tubeswithout disturbing the attached water piping.

H p n cT ng qut: cung c p h p n c c th d ch chuy n.

H p n c mu i: cung c p cc h p n c mu i v it m che ph c th d ch chuy n cho php ti p c ncc ng m khng lm nh h ng ng n c g nvo.

AccessoriesRefrigerant connections: Seal refrigerant hot gas inletand liquid outlet connections. Pressurise with drynitrogen.Water connections: Water flow and returnconnections, flanged to AS 2129 Table E. Fit blankcompanion flanges, bolts and gaskets. Alternatively,sizes DN 50 may be screwed, with removable plugsor caps.

Drain connections: Minimum DN 20 screwedconnection with valved connection points at thelowest point of both water boxes.Vent connections: Minimum DN 15 screwedconnection with valve.

Thermometer pockets: Provide at water inlet andoutlet.Cathodic protection: Provide sockets for cathodicprotection probes. Locate where recommended by thecathodic treatment specialist.Water side pressure drop test sockets: Provide at inletand outlet. Factory test and stamp condenser shell, orprovide metal tag, stating pressure drop at designwater flow.

Ph ki nu n i ng gas: lm kn ng gas v i u n i kh

nng ng vo v ch t l ng ng ra. T o pv i kh Nit kh.

u n i ng n c: cc u n i l u l ng n c vng h i c mp theo AS 2129 b ng E. L p ch

tr ng v i cc m t bch, bulng v mi ng m. Nhm t s l a ch n, kch th c DN 50 ph i v n vt,v i cc n p v ch t c th d ch chuy n.

u n i ng x : u n i v n vt nh nh t DN 20 v i

nh ng i m k t n i c van t i i m th p nh t c a chai bn h p n c.u n i ng thng h i: u n i v n vt nh nh T

DN 15 v i van.L g n nhi t k : cung c p t i u vo v ra c an c.B o v c c m: cung c p cc l cho thi t b b o vc c m. t t i n i c ngh b i chuyn gia xl c c m.

L ki m tra s gi m p su t n c: cung c p t i uvo v ra. Th nghi m t i nh my v ng d u lnthn bnh ng ng, ho c cung c p nhn kim lo i, sgi m p su t t nh theo l u l ng n c thi t k .

3.5 REFRIGERATION SYSTEM 3.5 H TH NG GAS L NH

GeneralDesign refrigeration systems for minimum refrigerantleakage potential.

T ng quanThi t k h th ng gas l nh nh m gi m thi u khn ng r r gas.

StandardsTo AS/NZS 1677.2 and SAA HB40.1.

Tiu chu nTheo AS/NZS 1677.2 v SAA HB40.1.

AccessoriesGeneral: Provide necessary refrigerant circuitaccessories, including the following:

- Discharge muffler (internal or external type).- Liquid line filter drier.- Isolation valve both sides of the filter drier.

Ph ki nT ng quan: cung c p cc ph ki n c n thi t ph c vm ch gas, bao g m:

- u x gi m m (lo i t bn trong ho c bnngoi)


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- Liquid line solenoid valves.- Liquid line sight glass moisture indicator.

- Refrigerant charging valve.

- Suction, discharge and oil pressure indication,either gauges or digital readout from transducers viathe microprocessor based control module, asappropriate.

- Expansion device.Chillers with multiple compressors: Provide at least 2independent refrigeration circuits.

- L c kh ng l ng- Van cch ly c hai pha l c kh

- Van solenoid ng l ng.- Knh xem m c gas l ng- Van n p gas.- Hi n th p su t u ht, u y, v d u, b ng

ng h ho c hi n th s chuy n i t b chuy ni tn hi u thng qua modun i u khi n s d ng

vi x l, cho thch h p.- Thi t b ti t l u.Chiller v i nhi u my nn: cung c p t nh t haim ch gas c l p.

3.6 CONTROL SYSTEM 3.6 H TH NG I U KHI N

Type

Menu driven, microprocessor based module.Tropicalised control box.

With data collection module for fault finding for eachchiller. Data collection should be possible by servicetechnicians local laptop computers, for emailing datato manufacturers factory for fault diagnosis.With RS 485 access capability.

Lo i

Ho t ng theo b ng l a ch n, d a vo cc modunvi x l.H p i u khi n nhi t i ha.B thu d li u cc d tm l i trn m i chiller. Ccd li u thu c trn my xch tay t i ch c a nhnvin k thu t, v g i email cho nh my s n xu tch n on l i.Kh n ng truy c p: theo c ng RS485

3.7 INDICATION 3.7 HI N TH

Centrifugal and screw chillersGeneral: Provide indication of the following:- System on.

-

Fault requiring manual reset.- Entering and leaving liquid cooler watertemperature.

- Chilled water set point.

- Voltage on each phase, for solid state starters.- Drawn current on each phase, for solid state

starters.

- Electrical current limit set point, for solid statestarters.

- Chiller diagnostics.- Remote chilled water set point signals.

- Hours run.- Start counter.

Accessories: Provide a general fault relay.

Chiler ly tm v tr c vtT ng quan: Cung c p cc hi n th sau

-

H th ng ang ho t ng- L i yu c u kh i ng l i b ng tay-Nhi t n c t i l nh vo v ra.- i m ci t cho n c t i l nh.

- i n p m i pha cho b kh i ng ki u bn d n.- Dng y t i cho m i pha cho b kh i ng ki u

bn d n.

- C ng dng ci t cho b kh i ng ki u bnd n.

- B ch n on chiller.

- Cc tn hi u ci t n c t i l nh t xa.- S gi ho t ng.- B m s l n kh i ng.

Ph ki n: cung c p r -le bo l i chung.

3.8 SAFETY CONTROLS 3.8 I U KHI N AN TON

GeneralProvide electrical interlocks to protect against thefollowing:

- Chilled water low flow.- Condenser fan motor overload, for air cooled units.- Compressor motor overload.- Oil pressure failure on refrigeration compressors.

- High and low pressure for compressors.- Short cycling of compressors.

T ng quanCung c p kha lin ng b o v trong cc tr ngh p sau:

- L u l ng n c t i l nh th p- Qu t i ng c qu t dn ng ng cho chiller gi i

nhi t gi.

- Qu t i mt my nn.- M t p d u trong my nn.

- Cao p v th p p trong my nn.


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- Low chilled water temperature. - Ng n m ch my nn.-Nhi t n c t i l nh th p

Centrifugal chillers

Provide electrical interlocks to protect against thefollowing:- Motor high temperature.- Contactor weld-in.- High bearing temperature.- Phase failure under voltage, single phase and

phase rotation protection.- High oil temperature.

- Surge protection by monitoring of compressormotor current.

- Pre-lube before compressor start and post-lubeduring compressor spin down.

Chiller ly tm

Cung c p kha lin ng b o v trong cc tr ngh p sau:- Nhi t ng c cao- Contactor khng nh- Nhi t tr c cao- M t pha do i n p th p, 1 pha v o pha.

- Nhi t d u cao.- B o v qu dng b ng cch hi n th dng ng

c my nn.- B m d u bi tr n tr c khi my nn kh i ng

v th c hi n bi tr n sau trong khi my nngi m t c .

3.9 MULTIPLE CHILLER CONTROL 3.9 I U KHI N NHI U CHILLERMultiple Chiller ControlWhere multiple chillers operate as a system, provide achiller system manager to operate the chillers as asingle central cooling plant.The chiller system manager shall be provided andcommissioned by the chiller manufacturer.

Operation of the chillers shall be such that energycosts are minimised.The chiller system manager shall interface with thebuilding management system using a serial interface,which shall be used to initiate the chiller system onrequest and to allow remote monitoring as below.Operating control and monitoring of auxiliary

equipment such as chilled water pumps, condenserwater pumps, purge units may be via the chillersystem manager or directly by the buildingmanagement system.

i u khi n nhi u chillerT i n i nhi u chiller ho t ng nh m t h th ng,cung c p m t b qu n l h th ng chiller v nhnh cc chiller nh m t vng lm l nh trung tm

c l p.

B qu n l h th ng chiller ph i c cung c p vnghi m thu b i nh s n xu t chiller.S v n hnh c a cc chiller ph i chi ph i nn ng gi m n m c t i thi u.B qu n l h th ng chiller ph i giao ti p v i BMS

ang dng m t giao ti p theo th t , c dngkh i ng h th ng chiller theo yu c u v cho phptheo di t xa nh ph n d i.

i u khi n s v n hnh v hi n th cc thi t b phtr nh cc b m n c l nh, b m n c ng ng, thi tb lm s ch qua b qu n l h th ng chiller ho ctr c ti p b i BMS.

3.10 REMOTE MONITORING 3.10 THEO DI T XA

GeneralCommon alarm: Provide for a common alarm signalto be connected into a remote monitoring system.BMS interface: Provide an interface to enable abuilding management system to interrogate thecontrol panel, or reset the chiller set points.BMS interface protocol: accessible by the BuildingManagement System supplier. Minimally allow

transfer of the following data.- CHW temperatures

- Refrigerant temperatures- Refrigerant pressures- Oil pressure- Current- % load

- Chiller diagnostics- Hours run

- Start counter- Alarm status- Alarm history

T ng quanTn hi u bo ng chung: cung c p tn hi u bo

ng chung c k t n i vo h th ng theo di txa.Giao ti p BMS: cung c p m t c ng giao ti p chophp k t n i BMS v i t i u khi n ho c ci t l icc gi tr i m ci t c a chiller.

Giao th c giao ti p BMS: c th truy c p b i nh

cung c p BMS. T i thi u c th truy n i cc tnhi u sau:-Nhi t n c t i l nh

-Nhi t gas.- p su t gas.- p su t d u.- C ng dng.

- % t i- Ch n on chiller- S gi ho t ng

- S l n kh i ng.- Tnh tr ng bo ng.


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- Other recommended parameters for remoteservicing.

- Cc tnh tr ng bo ng x y ra.- Cc thng s khc c khuy n co ph c v vi c

theo di t xa.

3.11 CAPACITY CONTROL 3.11 I U KHI N CNG SU T

Centrifugal and screw chillersOperation: Provide for chillers to start unloaded andfor subsequent loading and unloading to be by thecontrol system.Control system: Provide a control system whichsenses the leaving chilled water temperature andmaintains it at the desired setting by modulation of thecompressor slide valve, unloading ports or variablespeed drive, as appropriate.Current limiter: Provide control to limit the maximumcurrent drawn by the compressor motor by monitoringthe 3 phases of supply power.

Demand limiter: Provide control to permit continuousmanual control of power demand at operating pointsfrom 20 - 100% of full load power.

Chiller ly tm v tr c vtV n hnh: cung c p chiller kh i ng khng t i vtu n t t ng t i v gi m t i b ng b i u khi n.

H th ng i u khi n: cung c p h th ng i u khi nc m bi n nhi t n c t i l nh ra v duy tr nhi t

t i i m ci t b ng s i u ch nh c a vantr t c a my nn, cc c ng gi m t i ho c cnhch nh u vo cho thch h p.B h n ch dng i n: cung c p i u khi n h n chdng c c i c a my nn b i vi c theo di pha c angu n c p.B h n ch nhu c u: h th ng i u khi n cho php

i u khi n nhu c u cng su t b ng tay lin t c t ith i i m my ang ho t ng 20 100% t i.

3.12 CENTRIFUGAL COMPRESSORS 3.12 MY NN LY TM

ConstructionCasing: Close-grain cast iron arranged to allow accessto the rotor assembly inlet guide vanes and wearingparts.Rotor: Heat treated alloy steel or high strength castaluminium impeller statically and dynamicallybalanced for vibration free operation. Over-speed testthe rotor assemblies.

Bearings: Provide accessible precision bored mainbearings of the insert journal type and separate thrustbearings to axially position the impeller and absorbany unbalanced thrust.Pre-rotation vanes: Provide stepless capacity control,which maintains stable operating conditions andresponds to variations in load from leaving chilledwater setpoint temperature.Drive type: Select from the following:- Direct drive.- High speed helical gear train.Open drive compressor shaft seals: Provide oillubricated mechanical shaft seals which are efficientunder both vacuum and pressure conditions.

Lubrication: Provide oil separator, pump, filter, oilcooler, thermostatically controlled oil heater andpressurised lubrication during run-up and coast-downincluding coast-down after a power failure.Oil heaters: To operate during off cycles of thecompressor.

C u t oV : gang c m n h t c s p x p cho php ti pc n cc cnh d n h ng u vo rto v cc bph n.Rto: bnh cng tc b ng thp h p kim c x lnhi t ho c nhm c s c b n cao c cn b ngt nh v ng v n hnh khng c rung ng.Ki m tra qu t c cc b ph n c a rto.

tr c: cung c p cc tr c chnh c chn chnhxc c th s d ng c a lo i ngng tr c l ng vo vcc tr c s c p ring bi t t i v tr quanh tr c c abnh cng tc v h p thu cc s c p khng cnb ng.Cc cnh tr c khi quay: cung c p i u khi n cngsu t lin t c, duy tr tr ng thi ho t ng n nhv p ng cc t i khc nhau theo nhi t n c t il nh i ra c ci t.Lo i kh i ng: ch n t cc lo i sau:

- Kh i ng tr c ti p- B truy n ng bnh r ng xo n c t c cao.Cung c p d u bi tr n nh ng ch lm kn thn myc kh n ng lm vi c trong i u ki n c p l n chn

khng.Bi tr n: cung c p b tch d u, b m d u, l c d u,b gi i nhi t d u, b hm d u i u khi n nhi t vbi tr n p su t trong qu trnh ch y v ng ngmy k c ng ng my do m t i n.B hm d u: ho t ng trong su t chu trnh nghc a my nn.

3.13 PURGE UNITS AND PRESSURESYSTEMS

3.13 B LM S CH V H TH NG P SU T

Centrifugal chiller purge unitsGeneral: For chillers which, at any time, are belowatmospheric pressure, prevent loss of refrigerantduring purging cycle.

B lm s ch cho chiller ly tmT ng qut: cho chiller, vo b t c lc no d i psu t kh quy n, trnh t n th t gas l nh trong qutrnh lm s ch.


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- Deemed-to-satisfy: Purge units with an operatingefficiency of 99%.

Operation: Provide automatic controls which allowunattended operation.Alarm: Provide purge units which automatically alarmif excessive purging is detected within a continuallyupdated given time period.

- Th a yu c u: b lm s ch v i hi u su t ho tng 99%.

Ho t ng: cung c p s i u khi n t ng khngc n ng i gim st.Bo ng: cung c p b lm s ch c bo ng t

ng khi s lm s ch qu m c c pht hi n trongkho ng th i gian c p nh t lin t c.

Centrifugal chiller pressure systemsEmission abatement: For chillers which, at any time,are below atmospheric pressure, provide a means of- preventing air infiltration and refrigerant loss;

- preventing the subsequent need for purging to theatmosphere; and

- pressurising the chiller for leak-testing purposes.- Deemed-to-satisfy: Refrigerant emission

abatement systems, permanently attached to

chillers, and which automatically maintainpositive pressure within the chiller vessel duringnon-operational periods, by referencingatmospheric pressure.

Components: Provide the following:- Aluminium-plated, silicon heat blankets or hot

water heater.

- Solid state safety circuit/automation interface.- Refrigerant pressure controller.- Leak test mode set points.

- For blanket type systems:. Temperature limiting module capable of

ensuring that the heat supply cannot exceed apredetermined high limit temperature bysensing heat blanket temperature.

. Proportional control over heat blankets tomaintain setpoint.

H th ng p su t chiller ly tmS lm gi m mi: cho chiller, vo b t c lc nod i p su t kh quy n, cung c p bi n php- trnh khng kh thm nh p v t n th t l nh

- trnh nhu c u theo sau cho s lm s ch khngkh; v

- t o p chiller cho m c ch th x.- Th a yu c u: h th ng lm gi m s b c mi

c a gas l nh c l p c nh v i chiller, v

duy tr t ng p su t d ng trong bnh ch aca chiller trong qu trnh khng ho t ng,ph h p v i p su t kh quy n lin quan.

Thnh ph n: cung c p nh sau:- L p ph ch u nhi t b ng silicon m nhm ho c

b hm n c nng.- Giao ti p t ng / m ch an ton bn d n.- B i u khi n p su t gas l nh.- Cc i m th x- Cho cc h th ng l p ph :

. B ph n h n ch nhi t c kh n ng m

b o nhi t cung c p khng v t qu m tnhi t cao nh tr c b ng cch c mnh n nhi t l p ph ch u nhi t.

. Ki m sot s cn x ng c a l p ph ch unhi t duy tr i m ci t.

3.14 REFRIGERANT CONTAINMENT 3.14 D TR GAS L NH

Provide a mobile refrigerant containment system,suitable and of a capacity for storing the refrigerantfrom one chiller.

Cung c p h th ng d tr gas l nh di ng, ph h pv c kh n ng ch a m t l ng gas cho m tchiller.

3.15 ACOUSTIC INSULATION 3.15 CCH M

Provide discharge line sound reduction kit.Provide acoustic sound insulation kit.

Cung c p b ph ki n gi m m t i ng y.Cung c p b ph ki n cch m.

3.16 UNIT MOUNTED STARTER 3.16 B KH I NG C KHUNG

GeneralProvide a unit mounted started integrated with thechiller microprocessor based control system.Centrifugal ChillersThe starter is to be a variable speed type withappropriate electronic solid state drive as per MotorStarters.Control InterfaceThe following protection shall be included andmonitored.

T ng qutCung c p m t b kh i ng c khung giao ti p v im ch x l chiller d a trn h th ng i u khi n.Chiller ly tmB kh i ng l lo i t c thay i v i s truy n

ng i n bn d n thch ng nh B kh i ngng c .

Giao di n i u khi nBao g m v hi n th nh ng s b o v nh sau:- Ng t qu t i ng c


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- Motor overload trip- Phase loss/ reversal/ unbalance

- Under voltage/ over voltage

- Line side voltage- Line side current- Line side power factor- Frequency- Kilowatts

- Kilowatt hours

- M t pha/ o pha / khng cn b ng- D i p/ trn p

- i n p pha ngu n c p

- Dng i n pha ngu n c p- H s cng su t pha ngu n c p- T n s- KW- KWH

3.17 MARKING 3.17 GHI NHN

LabelsShow the following:- Manufacturers name.- Model number.

- Serial number.- Refrigerant type.

- Refrigerant charge.- Water side pressure drop and design water flow

rates.

Nhn myTh hi n bao g m:- Tn nh s n xu t- S model my

- S seri my- Lo i gas s d ng

- L ng gas n p.- M t p v pha n c v l u l ng n c thi t

k .

Rating platesRequired.

Nhn cng su t myPh i c.

4 COMPLIANCE WITH QCVN09-2013 4 TUN TH QCVN09-2013

B ng 2.6. Ch s hi u qu my i u ha khng kh lm l nh tr c ti p ho t ng b ng i nn ng

Lo i thi t b N ng su t l nhCh s hi u qu

COP t i thi u c amy l nh, kW/kW

Th t c ki m tra

My i u ha khng kh 1c m

- 2,30TCVN 7830:2012

v

TCVN 6307:1997

My i u ha khng kh

2 c m


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CHILLERS



b ng bay h i n c40 kW v < 70 kW 3,32

70 kW 2,70

Cc c m ng ng t gi inhi t b ng khng kh

40 kW 2,96

ARI 365Cc c m ng ng t gi inhi t b ng n c ho c

bay h i n c40 kW 3,84

Ch thch:

1) Ch s hi u qu my l nh: COP = N ng su t l nh /Cng su t i n tiu th (kW/ kW);

2) C m ng ng t bao g m my nn v dn ng ng;

3) Ch s hi u qu my l nh t i thi u cho trong B ng c tnh 100% n ng su t l nh. tnhch s hi u qu my l nh v n hnh trong th i gian 1 n m ARI 340/360 a ra cng th c sau:

IEER = 0,020A + 0,617B + 0,238C + 0,125D (W/W)

trong :

IEER Ch s hi u qu n ng l ng t ng h p l ch s hi u qu my l nh tnh cho th i gian v nhnh trong 1 n m theo cc m c ph t i,

A = EER Ch s hi u qu my l nh (W/W) 100 % cng su t;

B = EER Ch s hi u qu my l nh (W/W) 75 % cng su t;

C = EER Ch s hi u qu my l nh (W/W) 50 % cng su t;

D = EER Ch s hi u qu my l nh (W/W) 25 % cng su t;

B ng 2.7. Ch s hi u qu my s n xu t n c l nh (My lm l nh n c-Chiller)

Lo i thi t bN ng su t l nh

(kW)

Ch s hi u qumy l nh

COPMIN, kW/kW

Ch s tiu th n ngl ng

PICMAX, kW/RT

i n Nhi t

Chiller gi i nhi t b ng khng kh -ch y i n bnh ng ng g n li n ho c

bnh ng ng tch r i

T t c cc d i n ngsu t

3,10 1,133 -

Chiller Piston gi i nhi t n c - ch yi n


4,20 0,836 -

Chiller xo n c v tr c vt gi i nhi tn c - ch y i n

< 528 4,45 0,789 -

528 v < 1055 4,90 0,717 -

1055 5,50 0,639 -

Chiller ly tm gi i nhi t n c - ch yi n

< 528 5,00 0,702 -

528 v < 1055 5,55 0,633 -

1055 6,10 0,576 -

Chiller h p th gi i nhi t b ngkhng kh - 1 c p


0,60 (*) - 5,860

Chiller h p th gi i nhi t n c - 2c p


0,70 (*) - 5,022


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Chiller h p th - 2 c p

t gin ti p


1,00 (*) - 3,516

Chiller h p th - 2 c p

t tr c ti p


1,00 (*) - 3,516

Ch thch:

1) Ngu n: Tiu chu n ASHRAE Std, 90,1-2001; ASHRAE Std, 90,1-2004;

2) (*) i v i my l nh h p th COP = N ng su t l nh/ Cng su t nhi t tiu th ;

- Ch s tiu th i n : PIC = Cng su t i n tiu th / N ng su t l nh tnh b ng RT;

- Refrigerant Ton (RT): 1RT = 3,516 kW = 12000 Btu/h;

3) tnh ch s hi u qu lm l nh c a Chiller v n hnh trong th i gian 1 n m ARI 550/590-2003 a ra cng th c sau:

IPLV = 0,01A + 0,42B + 0,45C + 0,12D (kW/kW)

trong :

IPLV Ch s hi u qu non t i t ng h p l ch s hi u qu my l nh tnh cho t ng th i gian v nhnh trong n m theo cc m c ph t i;

A Ch s COP (kW/kW) tnh 100 % t i;

B - Ch s COP (kW/kW) tnh 75 % t i;

C - Ch s COP (kW/kW) tnh 50 % t i;

D - Ch s COP (kW/kW) tnh 25 % t i,

5 EXECUTION 5 THI CNG

5.1 GENERAL 5.1 T NG QUAN

Manufacturer's instructionsInstall in accordance with instructions supplied bychiller manufacturer. Include completedmanufacturer's checklists in commissioning data.

H ng d n c a nh s n xu tL p t theo h ng d n c a nh s n xu t chiller. Baog m m t danh sch cc i m ki m tra hon ch nhc trong h s ch y th v nghi m thu.

6 COMPLETION 6 HON T T

6.1 COMMISSIONING 6.1 CH Y TH V NGHI M THU

Operational checkCheck operation of the chiller system includingauxiliary equipment and control systems. Afterstarting up, adjust and calibrate the chiller system.

Ki m tra v n hnhKi m tra ho t ng h th ng chiller bao g m c ccthi t b ph v h th ng i u khi n. Sau khi kh i ngmy, i u ch nh v hi u chu n h th ng chiller.

Performance testsControls tests: For factory assembled chillers,demonstrate that chiller controls meet performancerequirements. Verify the marked set points ofinstruments, gauges and switches, by measurementof the controlled medium. Record and rectifydeviations.

Safety alarm circuits tests: Simulate each unsafecondition alarm.

Th nghi m c tnhTh nghi m i u khi n: i v i cc chiller c l prp t i nh my, ch ng minh h th ng i u khi nchiller p ng cc yu c u khi ho t ng. Xc minhcc thng s ci t trn d ng c , ng h , v cngt c b ng cch o l i cc thi t b c i u khi n. Ghinh n v i u ch nh l i cho ng cc sai s .

Th nghi m bo ng an ton m ch gas: m ph ng t im i tr ng thi bo ng khng an ton.

CommissioningCommission the chiller system under the

Ch y th v nghi m thuKi m tra v ch y th h th ng chiller d i s gim st


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supervision of the equipment manufacturersauthorised field technicians.

c a chuyn vin k thu t c a nh s n xu t.

6.2 MAINTENANCE 6.2 B O TRHermetic and semi-hermetic compressorsAnalyse refrigerant gas at 3 monthly intervalsduring the maintenance period. Determine the acidand moisture content of the gas. Submit analyses.

My nn kn v n a knPhn tch gas m i 3 thng trong su t th i gian b o tr.Xc nh hm l ng axit v h i m ch a trong gas.

trnh b ng phn tch.Manufacturers Comprehensive MaintenanceInclude manufacturers comprehensive maintenancefor duration of defect liability period (12 monthsfrom practical completion).

B o tr ton di n c a nh s n xu t

Bao g m vi c b o tr ton di n c a nh s n xu t trongth i gian ch u trch nhi m cc khuy t t t (12 thng kt ngy hon t t th c t ).

Maintenance ProposalOffer proposals at tender for annual maintenancecontracts, preventative and comprehensive,annually renewable for 5 years.

ngh b o tra ra cc ngh trong h s th u v cc h p ng

b o tr hng n m, d phng v ton di n, gia h n hngn m trong vng 5 n m.

m.03 chillers - vn - zuellig

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