bien-phap-thi-cong-dieu-hoa-khong-khi-thong-gio.pdf

7/29/2019 Bien-Phap-Thi-Cong-Dieu-Hoa-Khong-Khi-Thong-Gio.pdf

1/18

METHOD STATEMENT

Project Name: Intercontinental Resort & Spa Da NangMEP Package 3Project Ref: NATECH/2800

Ref : DNIC-Pkg3/CSF-MS/M/0001/ADate : 27 Jan 2011Rev : 00

BIN PHP THI CNG LP T H THNG IU HA KHNG KH V THNG GI.

1. Mc tiu:

Nhm m t lp t tt c thnh phn cu to nn h thng iu ha khng kh, thng gi baogm h thng ng ng gi, ng ng ng, ng ng nc ngng, h thng cp ngun, hthng iu khin v cc dn lnh loi ln/ dn lnh loi nh ph hp vi iu khon trong hpng, ti liu, v bn v thi cng duyt.

2. Phm vi cng vic:

Bin php thi cng ny bao gm cc cng vic lin quan ti tt c dn lnh loi ln/ dn lnh loinh. Cng vic ny c thc hin theo tin thi cng v bn v chi tit duyt.

3. Tham kho:

Vt t duyt.

Vt t cho thi cng duyt.

Tiu chun k thut ca cng trnh INTERCONTINENTAL AIR CONDITIONING &VENTILATION

SYSTEM SPECIFICATION.

Vt t cho thi cng duyt.

4. Tng quan:

H thng iu Ho Khng Kh cho to nh c chia lm 07 cng on lp t

a Lp t ng ng dn mi cht (ng ng)+ Lp t ng ng

+ Th kn ng ng

+ Bo n ng ng

b Lp h thng thot nc ngng t

+ Lp t ng ng

+ Bo n ng ng

c Lp t ng ng cp gi lnh, gi ti v ht gi thi

+ Lp t ng ng

+ Lp t qut cp v ht kh

d Bin php thi cng lp t qut

e Bin php thi cng lp t Indoor, Outdoor Unit

f Lp t phn in

+ Lp t cp in

+ Lp t t in

g Th kn h thng ng dn micht tng tngh Chy th hiu chnh h thng

PHN 1: BIN PHP THI CNG LP T NG NG NG

Page 1 of 18


2/18

METHOD STATEMENT



a - Cc cng on chun b

i phc v thi cng s phi hp vi dn v thi cng tin hnh lp t v dch chuyn gin gio phc

v cho cng vic lp t ng ngCc khu vc rng lp gin gio c nh dc theo tuyn thi cng thun tin cho thao tc

Chun b cc bin php v an ton lao ng

b- Thit b thi cng chnh:

+ My hn hi : 03 ci

+ n kh : 03 ci

+ Thit b ng ng : 03 ci

+ Dao ct ng ng : 05 ci

+ B loe ng ng : 05 ci

+ Pa lng cu : 03 ci

+ Khoan st cm tay : 03 ci

+ Khoan b tng : 03 ci

+ Cc dng c c kh : 05 b

+ Chai Nit : 10 chai

+ Gin gio : 40 b

c - Cc cng on thi cngH thng gm

H thng ng ng i trn trn gi

H thng ng ng i trong hp k thut ca ta nh

H thng ng i trn mi ti cc Outdoor Unit

ng ng sau khi thi cng phi m bo tiu ch kh, sch v kn

Cc bc lp t

1. Ri ng ng t v tr xc nh t Indoor Unit ti v tr t Outdoor unit :

Xc nh chnh xc v tr t Indoor v Outdoor. Ti ccv tr Indoor v Outdoor ng c tha 1 on thun tin cho vic thao tc lp t kt ni vi cc thit b cng on sau.Sau khi lp t 2 u ng c lm bp hn kn trnh bi lt vo

2. Ni ng ng vi u ni ca thit b: ng ng dn mi cht lnh c ni vi hai u cathit b s dng bi dng c chuyn dng l loe ng ng. u ng ng sau khi c loeni vo cc u van ch ca thit b.

3. Ni ng ng vi ng ng: Khi dn mi cht i xa, ng ng khng di th c ni vinhau bng phng php hn bc

Page 2 of 18


3/18

METHOD STATEMENT



4. Lm sch h thng ng: Thi kh N2 vi p sut duy tr 2kG/cm2 trong khi hn. H thngng sau khi hn phi c thi Nito mnh lm sch h thng ng ln cui cng trc khith kn

5. Th kn ng ng: Bt kn h thng ng a kh Ntio vo n p sut 35Kg/cm2 th dngli,theo di trong 24 gi nu p sut thay i 5% l t yu cu

6. Ht chn khng v np ga:

a. Chun b:Dng c cn thit:

- Dng c st ga km van ng m

- My ht chn khng: ct p phi thp hn-100.7kPa,my ht chn khng phi m bo ttkhng c du nht t my bm thm nhp vo ng ng ga. V cc vt t thit b nh hnh

bn di

Page 3 of 18


4/18

METHOD STATEMENT



Ch thch: 1-ng h gp

2-Bnh N2

3-Bn cn4-Bnh cha ga R410

5-Bm chn khng

6-ng ng

7-Van kha ng dch lng

8-Van kha ng ga

9-Cng kt ni vi cc van kha

10-Van B

11-Van C

12-Van A

13-Dn nng

14-Cng st ga

15- n dn lnh

16- H ng bn trng

17- Lu lng ga

b. Qui trnh ht chn khng: ng van A v 02 van kha ng lng, ng ga, m vanB v van C. Ht khng kh ng lng v ng ga trong thi gian hn 02 ting vict p ht chn khng phi t -100,7kPa hoc thp hn. Sau gi h thng hn 1ting trong iu kin trn nu ng h khng p sut khng thay i th h thng t

c. Qui trnh np ga: Tho my ht chn khng v bnh kh N2 kha van c lp ccng ng ny li. M van C. Van A,B v cc van kha ng lng v ng ga phic kha kn. Tin hnh np khi lng ga tnh ton tng ng vi h ng ngng t cng ng lng

7. Bo n ng ng: Cc ng ng khi lm vic dn mi cht lnh c nhit thp hnnhit mi trng, c bo n cch nhit bng ng cao su xp cch nhit cduyt. Pha ngoi cng qun Vinyl

8. Gi ng: ng ng dn mi cht ni gia cc thit b ca h thng khi c chiu ditrn 1m th cn cc ai hoc treo ng

H thng ng i trn trn gi

+ ng c treo trsn 1ty treo chc chn c th d dng iu chnh c cao

+ ai treo ng lm t tn trng km c b rng 3cm, dy 0,5mm, c un trn m kht lyng.

H thng ng i trong hp k thut

+ Cc trc ng i trong hp k thut c c nh vo chn ng bng np tn, trnh tipxc trc tip vi tng

- Chn lm bng thp U 50

Page 4 of 18


5/18

METHOD STATEMENT



- Np tn dy 30x0.5

H thng ng i ngoi tri kt ni ti cc outdoor unit:

- ng c i trong mng tn sn tnh in c np che,v c c nh vo cc gi bngthp gc .

PHN 2: LP T NG NG THOT NC NGNG

Page 5 of 18


6/18

METHOD STATEMENT



1) Tng qut:

H thng thot nc ngng x dng ng PVC c ng knh ng v cch nhit theo ch nh ca

bn v v vt t trnh duyt. Cng on th kn ng ng bao gm cc bc sau:

Th trc chnh xuyn tng (ng ng trong hp k thut):

+ Bt kn y ng v cc ng u vo ng nhnh trc chnh. Dng cc van chn u ng trc chnhv nt bt cho cc u ng nhnh.

+ Bm cp nc t t vo ng ng trc chnh

+ Kim tra s d r nc trn ng ng. Ch tin hnh bc cch nhit kn cc u ni sau khing ng c th v kn hon ton.

Th ng nhnh:+ Khi th kn ng ng nhnh, kho chn van trn ng nhnh, nc t t vo u ca mtnhnh bt k, theo di s d r ca nc.

Ch tin hnh bc cch nhit kn cc u ni sau khi ng ng c th v kn hon ton

Lp cc bin bn nghim thu cng vic th kn

Lp bin bn nghim thu cng vic xy lp

2) i vi ng ng i trn trn gi

+ ng c treo trn mt ty treo chc chn c th d dng iu chnh c cao.

+ ai treo ng lm t tn trng km c b rng 3cm, dy 0,5mm, c un trn m kht ly ng3) H thng ng i trong hp k thut

+ Cc trc ng i trong hp k thut c c nh vo chn ng bng np tn, trnh tip xc trctip vi tng

Chn lm bng thp U 50 Np tn dy 30x0.5

4) Khong cch cc gi treo tu thuc vo ng

ng knh ng Khong cch treo Gi

(mm) (m) (ty treo,np ng)

25 - 40 1 M6, 30x0.534 - 60 1,2 - 1,5 M6, 30x0.5

ng ng i xuyn sn hoc xuyn tng c bc mt lp ng PVC, khe h gia ng ng vng thp bo v c chn kn bng vt liu cch nhit.

Page 6 of 18


7/18

METHOD STATEMENT



PHN 3: BIN PHP THI CNG LP T NG NG CP GI LNH, GI TIV GI THI

1) Phng php

Tng quan

Kch thc ng gi v thit b s tun th chi tit k thut, ti liu v bn v thi cng duyt.

1. Tt c ng gi c ch to bng tn trng km. mbo rng tt c cc vt t ng u c sn xut t tn trng km ph duyt, cng nhnca nh thu s chp nh cc tm tn trng km lu li trc khi bt u gia cng. Cck s c th yu cu kim tra qu trnh gia cng. Khi cung ng vt t ti cng trng hontt, cc k s nn kim tra s lng v vt t s dng

2. Ch s dng cc loi ng c duyt cho thi cng

3. Cc h thng gi treo khc v linh kin cho ng sc s dng v kt hp vi cng tc thi cng trn theo ty chn ca nh thu c s phduyt ca k s c

4. Bung gi s c ch to cng lai vt liu vi nggi

5. Tt c cc cnh v ming ghp s c p bp xung b mt bn trong ng bng phng

6. Tt c cc l m ca ng gi i qua tng s c inkn bng bng thy tinh chng chy ph duyt.

7. Tt c cc ng gi s c neo cht vo kt cu tanh.

8. ng gi s c ch to v lp t sao cho khng brung ng tt c cc iu kin vn hnh

9. Tt c cc mi ghp s c lp vi ming m thchhp theo tiu chun ph duyt.

10. Cc ming gi s c lp t km ming m, cnh v vung vc, bng phng, chc chc bng vt c mu trng vi mu ca khung. Gi c lp km vi ng gi bt vt, bu long chc chn phng trt v ngn ngating n. Gi treo trn tng hoc trn khng s c neo cht vo kt cu ta nh s dng

bu lng loi ph hp v kch thc tng xng hoc bng phng php khc ph hp viiu kin hoc vt t c duyt.

11. Gia cng ng cch nhit s c cp trong t chcthi cng.

2) ng gi

1. dy ca tn trng km, mi ni bch, kch thc ca gi treo/bu long/ai c se theo nhthit k

2. Chi tit lp t in hnh

Page 7 of 18


8/18

METHOD STATEMENT



Page 8 of 18

100

mm

100m

m

100m

m

100m

m

100m

m

A

Duct size +5mm

A, B : Ductsize+5mm+CC : Refer to Table2

C

Flange bolt interval

B

Cuff 5mm or more

Detail of Conner of flange

Flange

4 corners must be fixed

Bolt and nut (8mm)

Bolt hole

(10-12mm)

: Various (Maximum size: 100mm)


9/18

METHOD STATEMENT



Hnh 1. Chi tit mt bich

Page 9 of 18

Cuff 5mm or more

Rivet

5mm or more

Detail of angle for flange

Gasket (Flange width)

Washer


10/18

METHOD STATEMENT



Hnh 2. Chi tit ni TDC

Page 10 of 18

Bolt

(8mm)TDC corner

TDC duct end (Width:30mm andover )

Gasket (Thickness:5mm, Flange width)

Nut(8mm)

TDC Joint Line-up

A B C

A

B

C

Cross armbrace

A: 150mm and belowB: 200mm and belowC: 150mm and over

C

C

Duct

Spacing of Cross Arm Brace

Duct

Cross armbrace

Gasket (Thickness:5mm, width: Flange Width)

TDCcorner

Cross Arm Brace Detail


11/18

METHOD STATEMENT



Ch : Bt k v tr no ca mi hn khng nm trong cc yu cu trn, s dng keo trt trm mihn bn trong ng gi.Ch : hnh thc v kch thc ca ng gi s c th hin trn bn v thi cng

Figure.14 Details of Divided Flow Branch construction

Note: Form and size of Divided Flow Branch shall be indicated on shop drawings.

Page 11 of 18

W>1,200

H>1,200

1,200

inside of duct

direction of flow

Acme Lock-Grooved

NOTE: Spacing of seams on the sameplane:

900mm minimum.

L1

L2

NOTE:L1 and L2 are decided with each flowvolume.


12/18

METHOD STATEMENT



Note: Form and size of Offset and transition shall be indicated on shop drawings.Figure.15 Details of Offset and transition construction

Figure.16 Sealant for edge of flange

ng gi mm

Gi mm cch m phi p ng cc yu cu sau:

.i ng gi mm cch m cho h thng lnh s l loi ng cch nhit & cch m cht lngcao v c cc k s ph duyt.

.ii ng gi mm s c lp khng gy ra bt k h hng no v tit din hiu dng

b. ng gi mm phi p ng cc yu cu sau:

i. ng gi mm cho h thng thng gi s l loi c cc k s c ph duyt.

Page 12 of 18

2

1

Over 50mm

NOTE : R1 and R2 are same dimension.R = more than W/2 (minimum:200mm)L = more than 100 mm

Angle Flange Joint

Sealant

Flange Joint

Sealant

TDC Joint


13/18

METHOD STATEMENT



ii. Gi mm s c lp khng gy ra bt k h hng no v tit din hiu dng

iii. di c bn ca ng gi mm khong t 1m n 1.5m

4 - Cng tc chun bi phc v thi cng s phi hp vi i thi cng tin hnh lp t v dch chuyn gin gio phc vcho cng vic lp t cc h thng ng gi.

Chun b cc bin php an ton thi cng.

Cc khu vc rng lp gin gio c nh dc theo tuyn thi cng thun tin cho thao tc

My gp m, my sn c s dng gia cng ng ng gi thay th cho phng phpg tay th cng. iu ny m bo cho cc ng ng gi c ch to t c cc chtiu k thut, m thut tt nht, nng cao nng sut lao ng.

Cc ng gi c nh du chi tit theo k hiu trn bn v thi cng gip cho cng viclp t trn cng tng c d dng.

Cc chi tit ng ng gi s c t hp thnh tng cm tu theo kch thc ng, sau c nng ln gi v lp rp vi nhau. Phng php ny s y nhanh tin lp t vgim khi lng cng vic thi cng trn cao. Cc tuyn ng gi s c cc chi tit ch c xcnh v ch to trn cng trng khp kn h thng.

Cc my cng c chnh s dung cho thi cng chnh:

+ My hn in h quang. : 01 Ci

+ My gp m : 01 Ci

+ My sn tn : 01 Ci+ My khoan bn : 02 Ci

+ My ct st : 02 Ci

+ My khoan cm tay : 05 Ci

+ Khoan b tng : 03 Ci

+ Dng c thi cng c kh : 05 B

+ Km rt Riv : 10 Ci

Page 13 of 18


14/18

METHOD STATEMENT



PHN 4: BIN PHP THI CNG LP T QUT

1.Mc tiu:

Nhm m t lp t qut ca h thng iu ha khng kh v thng gi ng vi c tnh k thut, tiliu, v bn v thi cng duyt. Qut lp t s ti thiu t c mc vn hnh ch nh.

2. Phm vi cng vic:

Bin php thi cng bao gm cng vic lin quan ti tt c qut trong h thng iu ha khng kh vthng gi. Cng vic ny s c thc hin theo tin thi cng v bn v chi tit.

3. Cc cng on thi cng:- Lp qut hng trc gn tng.

Cc v tr t qut trn tng c lp cc khung thp tm m km dy 0.8mm c kch thc michiu rng hn s o ca qut t 1 - 2.5 cm.

Dng va mc 75 trt vung vn cc v tr lp qut

Gn cht qut vo tng (hoc khung tole) bng cc vt st ca qut hoc ch to thm.

Lp qut hng trc ni vi ng gi.

Qut c lp t bng cch treo cht vo trn nh b tng bng cc b thanh treo v gi c

chng rung.Gi treo qut:

+ St U 100

+ Bu lng M10

+ Bu lng n M10

Page 14 of 18


15/18

METHOD STATEMENT



PHN 5: BIN PHP LP T DN NNG V DN LNH:

Bin php thi cng chi tit :

- Vn chuyn FCU,CDU,AHU n khu vc lp t bng xe chuyn dng

- Xc nh v tr v chng loi FCU, CDU, AHU theo ng bn v thi cng c duyt

- Kim tra, v sinh FCU, CDU, AHU trc khi lp t

- Tin hnh lp t FCU, CDU, AHU

- nh du v tr FCU, CDU, AHU cn lp t

- Chuyn FCU, CDU, AHU n v r cn lp t

- Lp t FCU, CDU, AHU

- V sinh v bao bc FCU, CDU, AHU

- Cng tc u ni (ng gi, ng nc, ng in)

- Kim tra v iu chnh FCU, CDU, AHU

Ghi ch: Tt c nhng u ni ra, vo ca ng nc, ng gi v ng nc ngng FCU, CDU,AHU phi tng thch vi bn v

Vic lp t c thc hin bi i ng cng nhn, k s nhiu kinh nghim

- Ty treo phi thng v ng kch thc i FCU. Cn CDU, AHU th b mt lp t phi bngphng.

- Dng cao su dy 10mm lm gim rung gia CDU, AHU v b mt tip xc nh sn nhhoc b mng t CDU, AHU

- S dng thng Nylong bao bc sau khi lp FCU, CDU, AHU

- Cc mi hn (nu c) hoc ren i vi ng nc v ph kin phi lm sch v sn bo v

- Cc mi ni in phi sit cht

- ng gi ni vo FCU, phi thng qua ng mm. Hp gi hi phi c ca thm bo tr, sacha

- Tt c cc mi ng gi vi thit b phi c bi kn bng silicon

- By nc x (nu c) c dng ch U

- Sau khi iu chnh mi ty treo phi c sit cht bng 2 con ai trnh hin tng t tho(i vi FCU)

- Bin bn xc nhn hon thnh cng vic lp t

Page 15 of 18


16/18

METHOD STATEMENT



PHN 6: BIN PHP THI CNG H THNG IN CP NGUN V IU KHIN

A - H thng bao gm:

ng cp in ng lc cp t t in ti outdoor unit & indoor unit

Cp iu khin t outdoor unit ti cc indoor unit.

T in phn phi.

B - cng tc chun b:

Lp t gin gio ni thi cng lp t cp in.

Chun b mt bng lp t in.

Chun b cc bin php an ton thi cng in.C- Thit b thi cng chnh:

+ My hn in h quang.

+ My khoan st.

+ Khoan b tng.

+ Dng c thi cng in

+ ng h o in vn nng

+ Thit b xc nh d in

+ Thit b o tip a

D- Cc cng on thi cng

Lp ng dy cp in cho outdoor unit.

Dy in ko t t in ti outdoor unit c t trong ng gen in PE tiu chun, ng knhgen in D 20 n D40.

Mi Outdoor Unit c 01 MCB bo v .

ng gen in gn vo trn bng cc coulier gi ng gen, khong cch l 1.5m.

Khng ni dy trong ng gen.

Cc dy tip a c ni t v t in ti v thit b m bo tip xc tt.

Page 16 of 18


17/18

PHN 7: BIN PHP TH KN H THNG NG NG NG DN MICHT.

A. Cc cng on chun b

Chun b thit b thi cng

B. Thit b thi cng chnh

+ n hn cm tay : 02 Ci

+ My hn hi : 02 Ci

+ Chai Nit : 20 Chai

C - Cc cng on.

Ni ng ng vo cc u ni ca Thit b.

Tho h 1 u ng ng pha Outdoor Unit, dng Kh Nit thi mnh lm sch pha trongng.

u kn Thit b vi ng ng dng Nit np y ti p sut 35kG/cm2, th kn trong 24 gi.

Nh vi th kn ng ng


18/18

METHOD

STATEMENTProject Name: Intercontinental Resort & Spa Da NangMEP Package 3Project Ref: CNA-HTE/2800

Ref : DNIC-Pkg3/CSF-MS/P/0002ADate : 18 Jan 2011Rev : 00

PHN 8: CHY TH V HIU CHNH H THNG

Sau khi hon tt mi cng vic lp t h thng my iu ha VRV c tin hnh chy th tng

myCc thit b s dng hiu chnh h thng:

+ ng h o m : 01 ci

+ ng h o nhit (kh: 02 ci

v t) : 01 ci

+ ng o in vn nng :

+ Thit b o tip a : 01 ci

+ Thit b xc nh d in : 01 ci

+ Thit b o n : 01 ci

Chy th my lnh:

Kim tra ton b h thng in bao gm cc dy dn, t in phi trng thi an ton. Tt c ccAutomat, Chng git, cc cng tc khi ng thit b phi trng thi ngt.

Kim tra an ton in trc khi cp in cho ton h thng

Kim tra cc thng s lm vic v mi trng kh hu trong cc h tiu th

o n rung ca cc thit b.

o nhit v m cc h tiu th.o cc thng s v an ton in ca h thng.

Cng tc kim tra chy th phi t cc yu cu:

+ o dng in ca tt c cc my nn khi lm vic Ilv Im

+ Cc thit b iu khin trng thi hot ng tt.

+ Cc thng s v nhit , m, n, rung t yu cu k thut.

+ t cc thng s v an ton in.

+ Thit b lm vic n nh trong thi gian 12h.

Lp bin bn kim tra chy th h thng

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