B.23 Air Handling Plant - VN - Centrepoint

AIR HANDLING PLANT

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

Centrepoint Page 1 of 14 of B.23 18 September 2007

AIR HANDLING PLANT H THNG THIT B X L KHNG KH

1 GENERAL 1 TNG QUT

1.1 FUNCTIONAL DESCRIPTION 1.1 M T CHC NNG The air conditioning equipment scope of works covers the air handling units (AHUs), primary air handling units (PAUs) and fan coil units (FCUs) and heat wheel.

Chng thit b dn lnh bao gm cc cng tc thuc v dn lnh ln AHU & dn lm lnh s b PAU, dn lnh nh FCU, v bnh thu hi nhit.

1.2 CROSS REFERENCES 1.2 THAM CHIU CHO

General Comply with the General Requirements worksection.

Tng qut Ph hp vi chng Nhng yu cu chung.

Related worksections Refer to the following worksections: Mechanical General Requirements, Chillers, Mechanical Piping, Mechanical Insulation, Fans, Filters, Air Coils, Ductwork, Mechanical Controls, Mechanical Commissioning, Switchboards, Switchboard Components, Motor Starters, Power Cables, Electrical Commissioning.

Nhng chng lin quan Tham chiu n cc chng sau: Nhng yu cu chung v c kh, H thng my lm lnh nc Chillers, H thng ngng c kh, Cch nhit ng ng c kh, H thng Qut, H thng Lc gi, Thit b dn lnh, ng gi, iu khin c kh, Chy th v nghim thu c kh, T in, Cu kin trong t in, B khi ng moto, Dy cp in, Chy th v nghim thu cc h thng in.

1.3 STANDARD 1.3 TIU CHUN

Microbial control To AS 4254 To AS/NZS 3666.1, AS/NZS 3666.2 and the recommendations of SAA/SNZ HB32.

Kim sot vi khun Theo tiu chun AS 4254 Theo tiu chun AS/NZS 3666.1, AS/NZS 3666.2 v cc yu cu ca SAA/SNZ HB32.

1.4 INTERPRETATIONS 1.4 GII THCH

Definitions Air handling plant: Proprietary and non-proprietary pre-assembled plant and prefabricated and site erected plant and plenums. Includes room fan coil units and air handling units. Room Fan Coil Unit (FCU): Relatively smaller units consisting of casing housing coils and a direct drive fan designed for mounting exposed within a room. The casing may also house filters and other items. Includes manufacturers variations within a range of this type of unit mounted concealed with or without connected ducts. Air handling unit (AHU): Larger units consisting of a casing housing a fan and coils. The casing may also house filters, dampers and other items. Includes larger sizes of units sometimes referred to as

Cc nh ngha Cm thit b x l khng kh: dn lnh nguyn b hoc lp rp sn v cc b phn ch to sn hoc rp ti ch v hp gi. Bao gm dn lnh x l khng kh v dn lnh nh cho phng. Dn lnh nh cho phng (FCU): thit b nh hn tng i gm c hp cha coil v mt qut dn ng trc tip c thit k gn ni trong phng. Hp cha c th c c b lc v cc chi tit khc. Bao gm cc chng loi khc nhau trong dy sn phm ny c loi gn m ni hoc khng ni vi ng gi. Dn lnh ln (AHU): thit b ln hn bao gm hp cha qut v coil. Hp c th cha c b lc, van gi v cc chi tit khc. Bao gm cc thit b c cng

AIR HANDLING PLANT



fan coil units. Primary air handling unit (PAU): Air handling unit dedicated to the pre-conditioning of 100% outside air.

sut ln i lc cng c gi l FCU. Dn lm lnh s b (PAU): dn lnh chuyn bit cho lm lnh s b 100% gi ti bn ngoi.

2 QUALITY 2 CHT LNG

2.1 TESTS 2.1 TH NGHIM

Type Tests All fan coil units must be type tested (each size) in an independent testing laboratory for scheduled performance, not limited to noise, air flow, static pressure, capacity, water flow, electrical consumption, fan speed. The type tests must be for the actual units manufactured, from the same factory and with the same physical components as the offered units. No fan coil units shall be considered without such type tested data. Otherwise, required for all coils (ARI) & fans (BS or EN).

Th nghim mu Tt c cc FCU phi c th nghim mu cho mi mc cng sut ti phng th nghim c lp v c tnh c lit k, khng b gii hn bi n, lu lng gi, p sut tnh, cng sut, lu lng nc, tiu hao in nng, tc qut. Th nghim mu phi thc hin cho thit b thc t c sn xut, t cng mt nh my v cng cc cu kin nh l thit b cho bn. Khng c FCU no c xem l khng c nhng s liu th nghim mu nh vy. Mt khc, yu cu cho tt c cc coil (ARI) & qut (BS hoc EN).

2.2 SUBMSSIONS 2.2 TRNH DUYT

General Submit product & selection data for the following: - Air Handling Units - Fan Coil Units Include; - Product data - Dimensional drawings - Coil selection data - Fan selection data - Acoustic performance from fan

$(induct) - Acoustic performance of unit

$(breakout) Submit product & selection data for the following: - Rotary heat wheel Include - Product data - Dimensional drawings - Performance data - Psychrometric plot - Acoustic performance

Tng qut Trnh duyt ti liu k thut thit b v s liu chn la cho: - AHU - FCU Bao gm: - Ti liu thit b - Bn v kch thc - D liu chn la coil - D liu chn la qut - c tnh n ca qut (induct) - c tnh n ca thit b (breakout) Trnh duyt thit b v d liu chn la cho: - Bnh thu hi nhit loi quay trn Bao gm: - Ti liu thit b - Bn v kch thc - D liu c tnh - Gin m - c tnh n

Sheet metal plenums If providing proprietary ribbed interlocking panel systems, submit details of construction.

Hp kh bng tole tm Trnh duyt chi tit cu to nu c cung cp lp t h thng hp kh bng tole tm c kha ln loi nguyn b ch to sn.

AIR HANDLING PLANT



3 PRODUCTS 3 THIT B

3.1 GENERAL 3.1 TNG QUT

Equipment enclosures Construction: Assembled and reinforced to prevent flexing and drumming. Provide for removal of major components. Access: Provide access for inspection and maintenance. - Access panels: Readily removable

with positive re-useable fasteners and soft gaskets which provide an airtight seal.

Insulation: Insulate enclosures to prevent external surface condensation under operational conditions. Outdoor location: Provide enclosures, materials and finishes which are corrosion-resistant, and weatherproof if necessary.

V my Cu to: lp rp v c gia c trnh cong vn v n. C th tho ri cc cu kin chnh. Li tip cn: Cung cp li vo cho cng tc kim tra v bo tr. - Np thm: loi c th tho lp c

bng cc ph kin cng cp c th ti s dng v cc m mm lm kn gi.

Cch nhit: cch nhit cho v my ngn nga ng sng b mt bn ngoi ch vn hnh. Lp t ngoi tri: Cung cp v my, vt liu v b mt hon thin chng n mn, v chng nc nu cn.

Condensate trays General: Provide a primary tray under each cooling coil section, extending downstream to collect water carry over, and under components on which condensation can occur. Material: Corrosion-resistant. Insulation: Insulate trays to prevent condensation internally and on external surfaces of the unit enclosure, under operational conditions. Condensate drains: Connect condensate trays to nearest drain points by means of trapped minimum DN 25 drain lines for FCUs and minimum DN 40 drain lines for AHUs. Allow for suitably sized condensate drains whether shown on the drawings or not.

Mng hng nc ngng t Tng qut: cung cp mt mng theo my di mi phn coil lnh, ko di xui dng hng ht nc trn, v bn di cc b phn no c th c ng sng. Vt liu: chng n mn. Cch nhit: Bc cch nhit cho mng ngn nga ng sng bn trong v trn b mt ngoi ca v thit b ch vn hnh. Thot nc ngng t: Ni mng hng ngng t n im thot nc gn nht bng ng xiphone ng knh ti thiu DN 25 cho FCU v DN 40 cho AHU. Gi trng thu bao gm cc chi ph thay i cc kch thc ng thot khc cho thch hp khi c hoc khng c th hin trn bn v.

Construction Provide guards on belt driven fans handling > 2000 L/s. Leakage: Seal unit so no air leaks can be felt or detected using a smoke pencil under maximum system operating pressure. Finish: Not less than the standard achieved with the paint system for zinc-coated steel in the General requirements worksection.

Cu to Cung cp khung che cho qut dn ng bng dy ai > 2000 L/s. R r: Lm kn thit b sao cho khng c r r gi c th cm thy hay pht hin c bng bt ch khi p sut lm vic ti a ca ca h thng. Hon thin: Khng thp hn tiu chun t c bng cch sn h thng thp m km trong chng Nhng yu cu chung.

Condensation control Take all steps necessary to prevent condensation on the outside of units under any operating conditions including: - Insulate drain trays. - Eliminate cold bridging.

Kim sot ngng t Thc hin tt c cc cng vic cn thit ngn nga ng sng trn b mt ngoi ca thit b mi ch vn hnh, bao gm: - Cch nhit cho mng hng. - Kh cu dn nhit.

AIR HANDLING PLANT



Casing stiffness Maximum deflection of casing: Under maximum internal-external pressure difference, provide casings having the lesser of - maximum deflection permissible in

AS 4254 Section 4; and - maximum deflection consistent with

correct operation and airtightness of the air handling unit.

Gia c v my vng ti a ca v: chnh lch p sut trong ngoi ti a, cung cp v my c vng nh hn theo - lch ti a cho php theo

AS 4254 phn 4; v - lch ti a m bo vn hnh tt

v kn kh ca ca dn lnh.

Coil separation Units > 1000L/s: Provide 300mm space between heating and cooling coils. Provide access panel or door into space between coils.

Tch ring cc coil Thit b > 1000 L/s: m bo khong cch 300 mm gia coil lnh v coil nng. Lp t np thm hoc ca thm vo khng gian gia cc coil.

Multizone units If heating coils are not provided, provide a perforated plate in the hot deck with pressure drop approximately equal to that of the cooling coil.

Thit b phc v nhiu phng Nu coil nng khng km theo thit b, lp t mt tm c l trong khoang nng vi tr lc xp x bng tr lc ca dn lnh

Coil access Arrange coils so that both faces of each coil are easily accessible for inspection and cleaning. Provide suitably located access panels and doors.

Li tip cn coil Coil phi c sp xp sao cho vic ra vo d dng c hai mt ca mi coil kim tra v lau chi. Ca ra vo phi t v tr thch hp

Sealants Standard: To AS 4254 clause 2.2. Use only sealants that do not foster microbial growth.

Cht trt kn Theo tiu chun AS 4254 mc 2.2. Ch c dng cht trt kn loi khng to mi trng cho vi khun pht trin

3.2 AIR HANDLING UNITS 3.2 DN LNH LN

General General: Provide units consisting of coils, piping, supply air fan, filters, accessories and electrical connections, mounted within an insulated enclosure. Configuration: draw through coil, single zone.

Tng qut Tng qut: cung cp thit b bao gm coil, ng ng, qut cp gi, phin lc, ph kin v hp ni in. Lp trong mt v cch nhit. Cu hnh: coil loi ko ra c, n l

Enclosures General: sectional or modular construction. Outer material: Galvanised sheet steel, powder coated. Inner material: Galvanised sheet steel, powder coated. Casing: With respect to EN1886 - Mechanical stability class 1A - Casing leakage classe B - Filter bypass leakage F9 - Thermal isolation T2 - Thermal bridging factor TB2

Access: Removable panels to provide access to all components. Access panels shall be secured with sash catches or hexagonal socket bolts. Access to commonly accessed items such as filters

V my Tng qut: kt cu tng phn hay nhiu phn ni li Cht liu mt ngoi: bng thp tm trng km, sn tnh in. Cht liu mt trong: bng thp tm trng km, sn tnh in. Casing: With respect to EN1886 - Mechanical stability class 1A - Casing leakage classe B - Filter bypass leakage F9 - Thermal isolation T2 - Thermal bridging factor TB2

Li ra vo: c ca loi tho lp c tip cn n tt c cc b phn. Ca ra vo phi c gi bng cht ca hay vt lc gic. Ca ra vo cc b phn thng thng nh phin lc phi c tay

AIR HANDLING PLANT



shall be via metallic door handles. Duct connections: Provide spigots or flanged connections.

ca kim loi u ni ng gi: bng cht ni hay bng mt bch

Fans Construction: as per worksection Fans. Delivery: Scheduled capacity plus 5% at scheduled static pressure. Type: Double width, double inlet, multi-blade, backward inclined centrifugal aerofoil blade type. Motors: Fan motors shall be selected at 120% of the fan mechanical power. Belt drive: Fans shall be driven by a minimum of 2 belts. A belt guard shall be fitted. Motor slide rails to allow belt adjustment. Drives to be multiple matched V-belt, adjustable ratio type rated at 1.5 times the motor wattage. Isolation: Fan and motors to be mounted on spring isolators of at least 40mm static deflection. Fan discharge to be connected to the enclosure discharge via a fire rated flexible connector. Variable speed drives: Where the fan motor is to be driven from a variable speed drive or other electronic speed controller, ensure that the motor is compatible to operate with the selected drive or controller. Note fan discharge velocity limitations.

Qut Kt cu: nh m t trong phn Qut Cng sut: cng sut danh nh cng 5% p sut tnh danh nh Loi: bn i, hai ng vo, nhiu cnh, cnh loi ly tm dc v pha sau ng c: ng c phi c chn 120% cng sut c ca qut Dy curoa dn ng: qut phi c dn ng bng t nht hai dy curoa. ng c phi lp trn thanh trt c th cng chnh dy curoa. Pulley phi l loi nhiu rnh ph hp dy curoa loi V, t s iu chnh l 1.5 ln cng sut in nng ng c. Chng rung: qut v ng c phi c lp trn l xo chng rung t nht l 40mm vng tnh. u ni thi ra ca qut phi c ni bng ni mm loi chu la B iu tc bng tn s: nu ng c qut c dn ng t b iu tc bng tn s hay b iu khin tc bng in t khc, phi bo m ng c c tng thch hot ng vi b iu tc Lu : tc thi ra ca qut c gii hn

Cooling coils Construction: as per worksection Air Coils. Performance: Scheduled capacity. Maximum 400 fins/m. Minimum 4 rows 2.5m/s maximum face velocity.

Coil lnh Kt cu: ging nh phn Coil khng kh Hiu sut: theo danh nh Nhiu nht l 400 fin/m Nh nht l 4 hng Tc b mt ln nht 2.5 m/s

Electric reheat General: Sheathed in steel or nickel alloy, with brazed spiral steel fins. Frames: Assemble elements in a galvanized steel frame with terminal connections contained in an enclosed terminal box. Line frames with calcium silicate or other fire rated product. Heating section: Install to allow access to the terminal box and removal of the assembly without disturbing other components. Fin rating: < 20W/m. High temperature limiting thermostats: manual reset type with external adjustable dial having range 60 120oC. Air pressure switch: operate in series

in tr gia nhit Tng qut: bc trong hp kim thp hay nikel, c cnh tn nhit dng xoc c bng thp ph ng thau Khung: in tr c t trong mt khung thp trng km, cc u ni in lp trong hp u ni kn. Vin khung bng calsium silicate hay sn phm chu la khc. Phn gia nhit: c lp t cho php tip cn hp ni in v tho lp cc ph kin m khng nh hng n cc b phn khc H s truyn nhit cnh: < 20 W/m. Cng tc nhit chng qu nhit: loi reset bng tay vi nm xoay chnh bn ngoi c dy chnh nhit t 60-1200C Cng tc p sut kh: hot ng ni tip

AIR HANDLING PLANT



with an air pressure switch. Electrical power supply: 3 phase

vi mt cng tc p sut kh Ngun in: 3 pha

Filter Section Box To be provided on all AHUs by the AHU manufacturer. For filter details refer to the worksection Filters.

Hp cha lc gi c lp t cho tt c AHU do cng nh ch to AHU. Tham kho chng Phin lc bit thm chi tit

Mixing Section Box Where mixing boxes are required, to be by the AHU manufacturer. Note dampers to be opposed blade type as per ductwork specification.

Hp trn Khi cn thit c khoang ha trn, phi do nh ch to AHU sn xut. Lu van gi phi l loi cnh i nhau nh m t trong phn qui nh k thut ng gi.

Sound power levels Sound power levels shall not exceed the scheduled values.

n n khng c vt qu gi tr cho php

Instrumentation points Provide for each section a means of measuring temperature and pressure using testing & commissioning instruments. Such test points may be field installed, however are to be provided by the AHU manufacturer and their installation shall not diminish the warranty on the units.

im lp thit b o c Lp t mi b phn mt l ch cho vic gn thit b o c nhit v p sut dng cho mc ch th nghim & chy th v nghim thu. Nhng im th ny c th thc hin cng trng, tuy nhin phi c cung cp bi nh ch to AHU v vic lp t chng khng lm gim vic bo hnh thit b.

3.3 PRIMARY AIR HANDLING UNITS

3.3 DN LM LNH S B

As per Section 3.2 Air Handling Units, though coils shall have copper tubes and copper fins.

Ging nh mc 3.2 dn lnh ln, cun coil phi lm t ng ng v cnh tn nhit bng ng.

3.4 FAN COIL UNITS 3.4 DN LNH NH

General General: Provide units consisting of coils, piping, supply air fan, filters, accessories and electrical connections, mounted within an insulated enclosure. Configuration: draw through coil, single zone.

Tng qut Tng qut: cung cp dn lnh bao gm coil, ng ng, qut cp gi, phin lc, ph kin v hp ni in. Lp trong mt v cch nhit. Cu hnh: coil loi ko ra c, n l.

Fan Coil Units - Horizontal Concealed Type To be provided with discharge collar and connected to discharge grille by means of flexible, fire retardant, pressure tight collar, or fiberglass transition duct, or acoustically lined galvanised sheet metal duct with a flexible connection between duct and fan coil housing. Acoustical lining and fiberglass duct shall be NFPA Class 1 or equal. Installation to include control valve(s), shut off valves with 16 mm O.D., threaded connections and automatic air vents on each coil.

Dn lnh nh - Loi m trn nm ngang c cung cp vi ming thi dng trn v c ni ti ming gi bng ng mm, chu la, ai sit, hay ng gi bng si thy tinh, hay ng gi bng tole trng km c cch m qua phn ni mm gia ng gi v khoang dn lnh. ng gi cch m v cch nhit bng si thy tinh phi theo tiu chun NFPA class 1 hay tng ng. Vic lp t bao gm van iu khin, van ng m c ng knh ngoi 16mm, ni ren v c van t ng x kh trn mi coil

Enclosures V my

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General: sectional or modular construction. Outer material: Galvanised sheet steel, powder coated. Inner material: Galvanised sheet steel, powder coated. Insulation: Polyurethane 19mm thickness, or the supplier to guarantee no condensation problems at wet bulb 25 deg C. Frame: Insulated and designed to avoid cold bridging The supplier to guarantee no condensation problems at the design wet bulb plus 1 deg C. Access: Removable panels to provide access to all components. Access to commonly accessed items such as filters shall be via metallic door handles. Duct connections: Provide spigots or flanged connections.

Tng qut: kt cu tng phn hay nhiu phn ni li Cht liu mt ngoi: bng thp tm trng km, sn tnh in. Cht liu mt trong: bng thp tm trng km, sn tnh in. Cch nhit: bng Polyurethane dy 19mm, hay nh cung cp phi m bo khng xy ra ng sng nhit bu t 250C. Khung: khung c cch nhit v thit k trnh cu nhit. Nh cung cp phi m bo khng xy ra ng sng nhit bu t 10C. Li ra vo: c np loi tho lp c ra vo tt c cc b phn. Ca ra vo cc b phn thng phi tip cn nh phin lc phi c tay ca kim loi. Phn ni ng gi: bng u ni hay bng mt bch.

Fans Construction: as per worksection Fans. Delivery: Scheduled capacity plus 5% at scheduled static pressure. Type: Double width, double inlet, multi-blade, forward curved centrifugal type. Double fan wheels to be statically and dynamically balanced, and resiliently isolated at all contact points with housing. Motors: Fan motors shall be selected at 120% of the fan mechanical power. 3-speed (Off-Low-Medium-High) split capacitor type with thermal overload protection. Permanently sealed, lubricated bearings Drive: Fans shall be direct driven. Isolation: Fan and motors to be mounted on rubber isolators of at least 5mm static deflection. Enclosure discharge to be connected to ductwork via a flexible connector.

Qut Kt cu: nh m t trong phn Qut. Cng sut: cng sut danh nh cng 5% p sut tnh danh nh. Loi: bn i, hai ng vo, nhiu cnh, cnh loi ly tm dc v pha trc. Bnh qut phi c cn bng ng v tnh, v c cch ly n hi nhng im tip xc vi khoang qut ng c: ng c phi c chn 120% cng sut c ca qut. Ba tc (Tt Chm Trung bnh Cao), t chia v c phn bo v qu nhit. trc c bi trn v hon ton kn. Dn ng: qut c dn ng trc tip. Chng rung: qut v ng c phi c lp trn cao su chng rung t nht l 5mm vng tnh. u ni thi ra ca qut c ni vi ng gi bng ni mm.

Cooling coils Construction: as per worksection Air Coils. Performance: Scheduled capacity. Maximum 400 fins/m. Minimum 3 rows 2.5 m/s maximum face velocity. Selection: select FCU to exceed air volume initially at high speed, and cooling capacity at medium or low fan speed (so that they are oversized).

Coil lnh Kt cu: ging nh phn Coil khng kh Hiu sut: theo bng lit k. Nhiu nht l 400 fin/m Nh nht l 3 hng Tc b mt ln nht 2.5 m/s Chn my: chn FCU vt qua lu lng gi ban u tc cao v cng sut lnh ti tc qut trung bnh v thp (v vy my l ln hn)

Filter Section Box Hp cha lc gi

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To be provided on all FCUs by the FCU manufacturer. To be at minimum 25 mm permanent cleanable aluminium mesh, or 12 mm permanent NFPA class 1 foam pad, or Panel Filter as per work section Air Filters.

c lp t cho tt c FCU do nh ch to FCU. Li nhm phi l t nht 25mm c nh c th chi ra c hay l tm foam 12mm c nh theo NFPA class 1, hay l tm lc nh trong chng Phin lc.

Controls To be equipped with a quiet operating, two way hydraulic, or electric valve(s)- 3-speed (Off-Low-Medium-High) fan control button and a heat/cool selector where required.

iu khin c trang b vi van hai ng loi hat ng m bng in hay thu lc. nhng ni c yu cu, lp t nt iu khin 3 tc (Tt Thp Trung bnh Cao) v cng tc chnh nng / lnh.

Dehumidification Generally dehumidification shall be provided by the PAUs.

Kh m Mt cch tng qut, vic kh m c thc hin bi PAU

Electric Reheat Units to have: - Factory installed magnetic contactor - Air flow switch - High temperature cutout with

automatic reset - Coils shall be of low surface

temperature type

in tr gia nhit Thit b phi c: - B khi ng t lp rp ti xng - Cng tc dng gi - B bo v qu nhit c reset t ng - Coil phi l lai c nhit b mt thp

Sound power levels Sound power levels shall not exceed the following.

n n khng c vt qu chi tit nh bng sau

Max allowable dB-Lw re 10-12 watts in duct sound power level

n cho php cc i dB-Lw re 10-12 watts trong ng gi Frequency Tn s

125 250 500 1k 2k 4k

Design noise criteria / Tiu chun n thit k Fan Coil units less than 1000 CMH / Dn lnh nh hn 1000 CMH Medium speed Tc trung bnh

59 55 49 46 44 42

High speed Tc cao

62 58 52 49 47 45

Fan coil units greater than 1000 CMH / Dn lnh ln hn 1000 CMH Medium speed Tc trung bnh

63 59 53 50 48 46

High speed Tc trung bnh

66 62 56 53 51 49

3.5 COIL SUPPORTS 3.5 CHI TIT COIL

General General: Support coils using one of the following: - The internal support frame of

conditioners. - Baffle plates around the coils. - Prefabricated, predrilled, hot dipped

galvanized steel frames.

Tng qut Tng qut: chi tit coil dng mt trong cc phng php sau: - Khung bn trong ca thit b iu ha khng kh - Tm ngn xung quanh coil - Khung thp ch to sn khoan l c m km nhng nng

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Coil banks: Provide coil banks if coil sizes exceed maximum limits. Dissimilar metals: Provide neoprene gaskets to separate the mating surfaces of dissimilar metals. Provide non-metallic top hat washers in enlarged holes under nuts and bolts connecting dissimilar metals.

coil: cung cp nu kch thc coil vt qu gii hn cho php. Kim lai khng ng dng: lp ron neoprene ngn cch nhng v tr tip xc b mt gia cc kim lai khng ng dng. Lp t vng m c ph vt liu phi kim loi trong l rng hn bn di v bulon v ai c ni kim lai khng ng dng.

3.6 MOTORISED DAMPERS 3.6 VAN GI IU KHIN BNG MT

Construction Comply with the Volume control dampers clause in the Ductwork worksection, and the following: - Side seals: Aluminium or stainless

steel. - Blade tip seals: Neoprene or silicone

rubber. - Leakage: 25 L/s.m2 at 1.5 kPa

pressure differential. - Bearings: Sealed-for-life ball bearings

only. Mounting: Sufficiently rigid to prevent flexing or distortion of the frame or ductwork during operation. Operation: If two sets of dampers are connected to a single motor, provide linkages that allow either damper to be adjusted without affecting the other.

Cu to Tun theo mc Van iu khin lu lng trong chng ng gi, v theo cc iu sau: - Kn mt: nhm hay thp khng r - Kn nh trc cnh: neoprene hay cao su silicone - R r: 25 L/s.m2 chnh lch p sut 1.5 kPa - trc: ch s dng bi loi kn. Lp t: chc chn chng li s un hay xon ca khung hay ng gi trong khi hat ng. Hat ng: nu hai b van gi c ni ti mt ng c, lp t b ni cho php mi van c iu chnh m khng khng nh hng ti van kia.

3.7 COOLING COIL CONDENSATE TRAYS

3.7 MNG NC NGNG T CHO COIL LNH

Tray design Design trays to: - Collect condensate and allow

complete drainage so that no water remains inside the tray when the fan has been off for 5 minutes.

- Extend under upstream and downstream sides of the coil.

- Extend under uninsulated piping and fittings.

- Permit inspection of all parts of coils and trays. Provide radiused corners to facilitate cleaning.

Thit k mng Mng c thit k : - Thu nc ngng t v cho php thi ht nc bn trong mng sau khi qut dng c trong 5 pht. - Ko di mng ti qua di phn u v phn ui ca coil. - Ko di mng ti qua di phn ng v ph kin khng cch nhit - Cho php kim tra tt c cc phn ca coil v mng. Mng phi c cc gc bo trn d dng v sinh.

Material Fabricate wetted parts from one of the following and seal all joints: - Copper alloy sheet designation

C11000. - Aluminium to AS/NZS 1734. - Stainless steel sheet grade 304L. -

Vt liu Ch to nhng phn b t t mt trong nhng vt liu sau v lm kn tt c nhng ch ni: - Tm hp kim ng C11000 - Nhm theo AS/NZS 1734 - Thp khng r tm 304L

Tray insulation Cch nhit mng

AIR HANDLING PLANT



Insulate trays using non-hygroscopic material to achieve same R-value as specified for the unit casing.

Cch nhit mng dng vt liu khng ht m t c gi tr R theo tiu chun cho khoang thit b

Stacked coils General: Provide each coil with a tray and run a minimum DN 40 drain pipe from the upper tray to the lowest tray. Lowest tray construction: Protect from mechanical damage to maintain complete drainage.

Thot nc Coil Tng qut: lp t mi coil mt mng v lp ng nh nht l D40 that nc t mng trn xung mng di. Mng bn di: bo v chng va chm c hc duy tr vic that nc hon ton.

Tray installation Fixing: Locate trays against coil support channels. Provide continuous silicone sealant around tray bases between the base and the floor. Flashing: Provide 0.6 mm stainless steel flashing: - Between the tray upstand and the coil

frame, falling towards the tray. - Between the tray upstand and the

casing, falling towards the tray.

Lp t mng C nh: t mng trn dn khung coil. Trt silicone lin tc quanh chn mng v y mng Tm ngn nc: lp t tm ngn bng thp khng r dy 0.6mm: - Gia thnh ng ca mng v khung coil, dc xung v pha mng - Gia thnh ng ca mng v v, dc xung v pha mng

Secondary condensate drain pans Provide insulated secondary condensate drain pans under all fan coil units and all valves above suspended ceilings, or above passageways.

Mng hng ngng t th cp Lp t mng ngng t cch nhit th cp di tt c dn lnh nh v tcac cc van lp trn trn treo, hay trn hnh lang.

3.8 HEAT WHEELS 3.8 BNH TRAO I NHIT

General General: Provide units consisting of wheel, controls, motor, accessories and electrical connections, mounted within an insulated enclosure.

Tng qut Tng qut: thit b bao gm bnh, phn iu khin, ng c, ph kin v t ni in, c treo trong khoang cch nhit

Substrate Aluminium foil.

Lp nn Tm l nhm

Desicant Water molecule selective and non-migratory. Non-masking porous binder. Capable of sensible and latent heat recovery, matching the sensible heat ratio required of the application. Demonstrate that structure of wheel is suited for latent/sensible heat ratio of the application. Lifetime: 10 years.

Cht lm kh C tnh chn la phn t nc v khng dch chuyn. L cht dnh xp khng to mng che C kh nng thu hi nhit hin v nhit n, chuyn thnh nhit hin. t l theo yu cu ng dng. Chng minh c l kt cu ca bnh th thch hp cho t l nhit n / nhit hin ca ng dng Tui th: 10 nm

Enclosure General: sectional or modular construction. Outer material: Galvanised sheet steel, powder coated. Access: Removable panels to provide access to all components. Access to commonly accessed items such as filters shall be via metallic door handles. Duct connections: Provide spigots or

V my Tng qut: kt cu tng phn hay nhiu phn ni li Cht liu mt ngoi: bng thp tm trng km, sn tnh in. Li ra vo: c tm tho lp c tip cn tt c cc b phn. Ca ra vo cc b phn thng xuyn tip cn nh phin lc phi c tay ca kim loi. Phn ni ng gi: bng u ni hay

AIR HANDLING PLANT



flanged connections. bng mt bch Rotor Rotate at lower than 25 rpm. The media shall be cleanable with compressed air, or light detergent, without degrading the heat recovery.

Rto Quay tc thp hn 25v/p Phn trao i nhit phi l lai c th v sinh c bng kh nn, cht ty nh m khng lm suy gim cht lng vic thu hi nhit.

Purge Field adjustable purge mechanism, allowing a portion of potential supply air to purge exhaust air.

B kh lm sch C cu c th iu chnh c, cho php mt phn ca nng lng khng kh cp kh sch kh ht.

Seals Face and radial seals: 4 pass non-contact labyrinthe.

Lm kn m kn b mt v hng tm: 4 rnh khng tip xc nhau.

Efficiency Latent transfer: Minimum 80% Sensible transfer: Minimum 80%.

Hiu qu Chuyn nhit n: t nht 80% Chuyn nhit hin: t nht 80%

Filters Air entering heat wheel from outside air and from exhaust air to be filtered to heat wheel manufacturers recommendations, or to scheduled performance, whichever is the minimum.

B lc Khng kh vo b bnh thu hi nhit t khng kh bn ngai v khng kh thi ra c lc theo tiu chun ca nh ch to bnh thu hi nhit hay theo hiu sut trong bng lit k, theo iu no l t nht

3.9 AIR LEAKAGE 3.9 R R GI

Baffle plates Close the space between the coil frames, fans and filters and the surrounding structure or equipment, with baffle plates. Fabricate baffle plates from: - Copper alloy designation C11000. - Galvanized steel to coating class

G2/Z275. - Aluminium to AS/NZS 1734. - Grade 304L stainless steel. - Sandwich panel material complying

with Casings and plenums - Sandwich panel.

Tm ngn Dng tm ngn che kn khong khng gia khung coil, qut v phin lc v xung quanh kt cu hay thit b. Tm ngn c ch to t: - Hp kim ng C11000. - Thp trng km t G2/Z275 - Nhm theo AS/NZS 1734 - Thp khng r 304L - Tm c kt cu nhiu lp tng thch vi mc V v khoang tm c kt cu nhiu lp

Sealing Seal gaps between coils and surrounding structure or equipment.

Lm kn Lm kn khong h gia coil v kt cu xung quanh hay thit b

3.10 ACCESS DOORS AND PANELS

3.10 CA THM V NP THM

Location Provide an access door or panel in each section of the air handling units to which access is required for maintenance, inspection or removal of components. Alternative: Provide removable panels the full height of the unit instead of doors where access is required only for removal of coils or fans.

V tr i vi cc b phn c yu cu bo tr, kim tra, hay tho lp sau ny, lp t mt ca hay np thm cho mi b phn . Chn la khc: cung cp np tho ri c c chiu cao bng thit b thay cho ca ni ch cn tho lp coil hay qut.

Sizes Kch thc

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Minimum clear openings: - Access panels for personnel access:

450 x 600mm. - Access panels for hand access: 200 x

300mm. - Doors: 1350mm high x 600mm or

larger if necessary to permit safe removal of equipment inside the section.

Kch thc nh nht phi nh sau: - Np thm cho ngi: 450 x 600 mm - Np thm cho cnh tay: 200 x 300 mm - Ca: 1350 mm cao x 600 mm hay ln hn nu cn thit cho php tho lp an ton thit b bn trong phn

Access panels Construction and insulation: To match unit casing or comply with the Access panels clause in the Ductwork worksection. Frames: Provide rigid matching galvanized steel frames securely attached to the duct. Do not protrude any part of the panel or frame into the airstream. Seals: Silicone rubber or soft neoprene gaskets mechanically fixed to either the panel or the frame provide an airtight seal against the operating pressure when latched in the closed position. Latches: Wedge type sash latches. Number of latches: - For personnel access: 4. - For hand access: 2. Handles: Provide a handle on each panel for personnel access.

Np thm Kt cu v cch nhit: phi ging vi v thit b hay tng thch vi mc Np thm trong chng ng gi Khung: lp t khung thp trng km gn chc chn vo ng gi. Khng nh ra bt c phn no ca np hay khung vo pha ng gi. Lm kn: dng silicone hay ron neoprene mm dn ln np hay khung lm kn kh trong trng hp c p sut khi cht ng np thm. Cht ci: cht nm dng ko trt S cht ci: - Cho ngi ra vo: 4. - Cho tay ra vo: 2. Tay nm: lp t mt tay nm trn mi np cho ngi ra vo.

Doors General: Provide rigid, reinforced access doors hinged so that internal air pressure holds doors closed. Door swing: Against air pressure. Frames: Rigid galvanized steel or extruded aluminium. Door hardware: Provide 2 proprietary clamping-type latches with permanently attached handles that can be operated from both the inside and the outside of the door. Seals: Silicone rubber or soft neoprene gaskets mechanically fixed to the door to provide an airtight seal when latched closed.

Ca Tng qut: lp t mt ca thm c bn l chc chn p sut khng kh bn trong s gi ca v tr ng. Chiu quay ca ca: ngc vi p lc kh. Khung: bng thp trng km cng hay nhm nh hnh. Ph kin ca: lp t 2 cht ci dng nm loi nguyn b ch to sn, c tay nm bt c nh c th ng m t c pha bn trong ln bn ngoi ca ca. Lm kn: dng silicone hay neoprene mm dn quanh ca lm cho ca kn kh khi ci kha ca.

3.11 SERVICE LIGHTS 3.11 N CHIU SNG

General Provide waterproof fluorescent luminaires in each compartment with an access door or removable panel: - Air handling units

AIR HANDLING PLANT



18 watt compact fluorescent luminaires.

Switching: Connect to a common switch located outside the chamber. Label the switch and provide pilot light.

Cng tc: ni n mt cng tc chung t ngoi khoang. Dn nhn ln cng tc v lp mt n bo.

4 EXECUTION 4 THI CNG

4.1 AIR HANDLING UNIT INSTALLATION

4.1 LP T DN LNH

Access and removal Ducts: Keep adjacent equipment and ductwork clear of air handling units. Provide flanges or spigots for connection to adjacent equipment and ductwork. Piping: Install piping to coils to allow access to equipment, and to minimise disturbance to piping when coils are removed. Arrange piping and isolating valves to minimise drain-down if coil is removed. Coils and fans: Arrange air handling units and adjacent equipment to permit safe removal of coils, fans and fan shafts without disturbing other adjacent items or building. Motorised dampers: Locate dampers and damper motors in accessible positions, for blade and motor maintenance and blade seal replacement. Do not install dampers on top of mixing box unless ducted.

Li tip cn v tho lp ng gi: t thit b ln cn v ng gi cch xa dn lnh ln. Lp t mt bch hay u ni dng ci cho thit b ln cn v ng gi. ng: lp ng vo coil sao cho c th tip cn thit b, v hn ch nh hng n ng ng khi tho lp coil. Sp xp ng v van chn hn ch vic nc b x khi tho lp coil. Coil v qut: sp xp dn lnh ln v thit b bn cnh sao cho vic tho lp cc b phn sau an ton m khng nh hng n cc b phn khc hay ta nh: coil, qut, v trc qut. Van gi iu khin mt: t van gi v ng c v tr c th tip cn cho vic bo tr cnh v ng c v thay th ron. Khng lp van gi trn hp ha trn tr khi l c bc bao che.

Vibration Duct connections: Provide either internal or external flexible duct connections at fan. Fan vibration isolation: Either mount fans and motors on vibration isolation within the unit or mount the whole unit on specified vibration isolating mounts.

Rung ng Phn ni ng gi: lp t phn ni mm bn trong hoc bn ngoi qut L xo chng rung cho qut: lp cho c qut v ng c bn trong thit b hay lp cho c thit bi bng l xo chng rung theo tiu chun.

Supports and fixings Suspended units: Provide 4 hangers. Floor mounted units: Fix in position at 4 points to prevent horizontal or vertical movement. Fixings: Do not restrict effectiveness of vibration isolation.

Chi tit treo v gi cht Treo thit b: lp 4 ty treo. Lp trn sn: c nh 4 im trnh s di chuyn ngang hay thng ng. Lp c nh: khng lm gim hiu qu ca l xo chng rung.

4.2 PIPING 4.2 NG NG

General Pipe connections to unit: Provide unions on pipes DN 50 and flanges on pipes > DN 50. Support: Prevent stress on coils by independently supporting piping to coils.

Tng qut ng ng ni ti thit b: lp t khp ni i vi ng DN 50 v mt bch i vi ng > DN 50 Gi : ngn nga ng sut ln coil bng gi treo ng c lp.

4.3 CONDENSATE DRAINS 4.3 THOT NC NGNG T

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General Condensate drains: Provide trapped drain lines to connect condensate trays to the nearest building drain point. Discharge outside the air handling unit. Trap depth: To withstand > 2 times the fan static pressure. Provide drains from: - Each cooling coil. - Each safety tray. - Other moisture collecting areas. Size: The greater of unit drain connection size and DN 20. Fall: Provide drains with uniform and continuous fall. Sealing: Seal drain pipes to casing with rubber grommets. Test: Test drains by pouring a measured quantity of water in upstream end.

Tng qut Thot nc ngng t: lp t ng thot c xiphone ni vo mng hng nc ngng t v i v im thot nc gn nht trong ta nh. su ca xiphone: chu c > 2 ln p sut tnh ca qut Lp t ng thot t: - Mi coil lnh - Mi mng nc th cp - Nhng khu vc c t nc khc Kch thc: theo ci ln hn gia l thot ca thit b v DN 20. dc: lp t ng dng v dc u lin tc Lm kn: lm kn gia ng thot v v my bng vng cao su Th nghim: th nghim ng thot bng vic mt lng nc vo u thng ngun

Material Copper: To AS 1432 Type B. UPVC: To AS/NZS 1477, installed to AS 2032. Trap material: Transparent, kink resistant hose.

Vt liu ng ng: theo AS 1432 loi B UPVC: theo AS/NZS 1477, lp t theo AS 2032. Vt liu lm xiphone: ng trong sut, chng tht.

Date post:	13-Oct-2015
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B.23 Air Handling Plant - VN - Centrepoint

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