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1 Table f Cntents Title Page Intrductin Nmenclature... 5 Air handling unit quick selectin chart... 6 Physical data... 7 Design sftware Examples Fan rating Cils rating: Cling Cil ( Chilled Water)... 1 DX Cil... Heating Cil (Ht Water)... Steam Cil... 4 Supply air cnditin... 5 Crrectin Factrs: Static pressure drp crrectin factr... 6 Air density in varius temp.& elevatin crrectin factr... 6 Cling cil by pass factr... 7 Heating cil crrectin factr... 7 Steam heating cil crrectin factr... 8 Cling cil sensible heating factr (SHF)... 8 Air velcity crrectin factr(cfv)... 9 Cils cnnectin Air side pressure drps. Cils air side pressure drp... 0 Air filter technical date and pressure drp... 1 Accessries air side pressure drp... Humidifier... Multizne specificatin... Multizne heating cil(ht water) ratings... 4 Multizne steam cil ratings... 5 Cils water side pressure drps. 1 Rw Cils pressure drp...6 Rws cils pressure drp Rws cils pressure drp Rws cils pressure drp Rws cils pressure drp Rws cils pressure drp...8 Standard Air Washer Air Washer specificatin

2 Table f Cntents Title Page Class 6 (Single bank)... 9 Class 8 (Duble bank)...9 Air washer dimensin...40 Evapratin,bleed ff and makeup water f air washers Air Washer efficiency Water treatment Dimensin and weight Standard hrizntal type Standard vertical type Typical Hrizntal Drawings...45 Standard L-type Standard multizne Typical L-type Drawimg Standard class 6 Air washer Standard class 8 Air washer...48 Air washer drawing Typical cil piping diagram Optinal accessries Sectinal dimensin...51 Service area requirements... 5 Engineering guide

3 Intrductin Quality, First f all! Fr ver 18 years ARVAND air handling equipments has been respected and regarded as a quality prduct. As yu knw tdays air handling market is changing. Demands fr imprved indr air quality, the reductin in nise generatin, and ever shrinking mechanical equipments,space in a building are amng the factrs that require better prduct fr the market ARVAND has designed an air handler unit prduct line, that frm an engineering stand pint can nt be challenged. ARVAND AAHU S air handling units are the ideal chice fr the cling, heating, humidifying, dehumidifying, purifying and ventilating f air in all residential cmmercial and industrial buildings. AAHU series cmprises 14 mdel cvering wide range f air flw rate frm 00 m /hr t 68,000 m /hr. The ARVAND AAHU S air handlers are available with tremendus design flexibility. This flexibility is reflected in the numerus sectin and cmpnent available, cmbined with the ability t arrange the cmpnents in what ever cnfiguratin is required fr the jb. ARVAND AAHU S air handlers can be shipped by cmpnent sectins, ( cmpletely kncked dwn), mdules, r as a single unit. This gives the custmer the ptin f installing a cmpletely assembled unit, r by sectin fr retrfit jbs requiring smaller sectins t fit int the building. In a very special case a tailr made custm design units are available n request. Features, Cmpnents And Optins Structure Made frm ht dip galvanized steel ( G 90 r equal ) r extrude aluminium prfile. Jints by blts t prtect zinc cating and easy t field installatin and accessibility. Rigid crner made by standard L type steel prfile r very new type f aluminium r plyamide crners. Ability t ship in sectins, mdules r cmplete units. Casing Made frm galvanized steel ( G 90 r equal ), cating with electr pwder cating epxy base cating n request ). Slid r perfrated duble wall skins, with 5 r 45 mm thick insulatin plast fam r rckwl insulatins ( 80 kg/m density ) (plyuretane insulatins are als available n request ). Hinged access dr with full grip handles in all sectins in ne side ( bth side n request ) with ptinal sight windws and lights. Casing shall be prvided with stainless steel in uter surface r inner surface r bth n request. Fans Frward curved, backward curved and air fil back ward curved. New design plug fans are available. Single speed as standard and tw speed r variable speed drive mtrs n request. Internally r externally munted mtr. IP 54/55 with class F insulatin n all internally munted mtrs. Special mtr ( anti spark ), very high grade f prtectin and insulatin. Statically and dynamically balanced wheels with certificatins. Very high technlgy tapared bush pulleys in mtr and fan. Self aligning, grease - Lubricated ball bearings with pillw blcks.

4 Cils Very advanced high technlgy extended surface with ENHANCED LOUVRED V- WAFFLE FINS with rippled edge fr all type f chilled water, ht water, DX and steam cils, with aluminium r cpper fin and cpper tube in 1/ and 5/8 OD Bradest range f fin spacing ptins ( 8 and 14 fin per inch as standard ). 1 thrugh 1 rws deep. Optinal fin, tube and casing materials. Hydrauphbic blue cating n aluminum fins are available. Optinal misture eliminatrs n cling cils. Visible slped drain pans in cated galvanized steel r stainless steel n request. Optinal access between cils fr sensrs r ther cntrler installatin. Filters Flat and angular ( V-Type) filter racks. Standard 50mm thick permanent washable aluminium filter panel and ptinal thrw away glass fiber air filters. Bag filters, rll filters, il filters, HEPA& ULPA filters in full range f filter efficiencies. Very new high technlgy filter frames with special clips fr installatin and remvalf filters very easily. Full arrangement f air filter, in back and frnt f fan imprve very clean air in special case and clean rms. Mixing Bx Optinal ultra seal lw leak ppsed blade dampers and standard aluminium airfil prfile blade. Externally munted and linked as standard and internally munted n request. Manual r mtrized cntrl damper. Shall be prvide with all kind f filter cmbinatins. Lw leak dampers as standard and ultra seal lw leak dampers n request Diffusers Prvided with %60 free area galvanized steel plate and shall be installed dwn stream f high efficiency filters ( specially after fan sectins ), silencer r blw thrw cils. Blenders Ecnmic r space saving ptins fr mixing fresh and return air. Sund Attenuatrs ( Silencers) Full range f insertin lss are available up t 5 db lss. 4

5 Humidifier Fine spray type that feed with ht water atmized and sprayed it t air stream under pressure. Steam grid type that feed with lw pressure steam and inject dry steam t air stream. Pan type humidifier with stainless steel pan and multi stage electric heater may be use when large quantity f steam is required. Air washers in mdels, class 6 and 8, that spray a large quantity f water t air stream and the misture cntent f air rises due t water evapratin. New technlgies steam generatr with splited bx and internal munted stainless steel nuzzles are available. Nmenclature A AHU A 8W S H A 160 C6 H RH1 B SGH S Arvand Air Handeling Unit Per Filter A=Aluminium Washable Filter F=Filber Glass Thrw Away Filter B= Bag Filter 8W=Air Washer Class 8 6W=Air Washer Class 6 S=Single Zne M=Multi Zne H=Hrizental V=Vertical L=L-Type A=Assembled S=Sectinal D=Disassembled Mdel Based n: Cild Face Area (m) x 100 (apprx) Heating Cil 1=1 Rw = Rw = Rw Cling Cil 4=4 Rw 6=6 Rw 8=8 Rw Reheat Cil 1=1 Rw = Rw = Rw Other Accessries S=Silenser B=Blender Humidifier SGH=Steam Grid Humidifier FNH=Fg Nzzle Humidifier PH=Pan - Type Humidifier SGM - Steam Generatr Final Filter A=Aluminium Washable Filter B=Bag Filter H=Hepa Filter U=Ulpa Filter P=Pleated Filter C=Carbn Active Filter E=Etc 5

6 Quick Selectin chart Cil face velcities - Cld water cil withut eliminatr - Cld water cil with eliminatr - Ht water cil m/s AAHU Size UNIT Cil Face Area (m ) AIR DELIVERY (M /HR) x 1000 Example : fr 4000 m /hr Air delivery yu can use: Mdel AAHU-160 just fr heating (yu can nt use any cling cil in the unit). Mdel AAHU-10 fr heating and cling cil with drplet eliminatrs after cling cils. Mdel AAHU-80 fr heating and cling withut drplet eliminatrs after cling cils

7 Table1 : Physical Data A-AHU Nminal Cil Specificatin V- Type Filter Fan (Standard) Mtr (Standard) MODEL Air Delivery Face N. f Tube Length Face Thickness N. f SIZE(DIA-WIDTH) N. f Pwer* (m in /hr) Area(m ) Cil Height (mm) Area(m ) (mm) Fan (inch) Mtr (kw) *Standard mtr pwers are based n nminal air delivery in 75 mm H O ttal static pressure drp. cnsult Yekta Tahvieh Arvand technical ffice fr ther cnditins. 7

8 Certified Yur Prducts Using Arvand AHU Sftware. AHU Design Sftware Arvand AHU sftware cmplies with Eurvent requirements and all designs with this prgram achieve this certificatin. ARVAND AHU design sftware is made t ease the calculatin f Air handling unit and enable cnsultants and HVAC. designers custmizatin f their demand. yu can design all details including mixing bx, filter, cils,, fan, separatr, silencer, heat recuperatr and all details in an Air handling unit. It is pssible t calculate heating, cling, direct expansin, steam and cndensing cils in AHU. Fr thse custmers using heat recvery, AHU als permits the estimatin f such cils. This applicatin is very simple and intuitive. Ttal Guide Fr Wrking With AHU Sftware Select file,and then select new prject. On the left side yu can select different bxes in an Air handling unit. By selecting these bxes and attaching them tgether yu can create yur desired AHU. Yu shuld select right altitude fr desired city and enter air flw. The prgram ffers yu different sizes accrding t air velcity and yu can chse ne. 8

9 Cil Design Select the cling cil, right click n it and then chse calculate menu. In calculate windw yu shuld enter yur cil demands and select calculate tab, then different cil ptins appears with different capacities and efficiencies. Then yu chse ne f them and select cntinue. Then yu shuld repeat this prcess fr design f heating cil. 9

10 Fan and Mtr Selectin After designing f cils yu shuld enter fan and mtr prperties including: air flw, internal Pressure drp, static / ttal pressure, and air velcity (min,max). Then click n select tab. Sme ptins fr fan selectin will appear and yu shuld chse and click ne f them accrding t yur desire. By clicking n graph tab yu can see fan curve and chse ptimum pints fr RPM accrding t efficiency. Yu can select fan brand,als nrmal r duble fan ptin. In mtr selectin yu can chse mtr type and number f ples. Click n ne f the mtrs shwn and click n cntinue tab. 10

11 Detailed Print By clicking the detailed print menu in main page, yu can see design specificatins f every sectin. The weight and dimensins are in first page. Yu can see cils input and utput n psychrmetric chart and,fan curve in ther pages. finally yu can print the infrmatin. Dn't frget t save yur prject. Fr mre infrmatin n this prgram yu can cntact ur engineering department. 11

12 Selectin Examples Example 1 : Given : Lcatin : Nzheh, Hamedan, 1010 m abve sea level. - Air Delivery m /hr. the unit based n Air delivery and permisible cil face velcity. - Return Air m /hr. - Fresh Air m /hr. - V Type Filter. - Bag Filter ( Pre-Filter ) 85% efficiency. - External Static Pressure lss 0 mmho. Summer Cling : - Cling lad Kcal/hr - Indr DB C - Indr RH % -Frm table1 ARVAND AAHU-160 with face area f 1.59 m is selected. B-Cling cil specificatin leaving DB, SHF : Cling prcess line demnstrate n chart. N.1 On page First, determine DB f mixed air. - Out dr DB C - Out dr RH % Winter Heating : Steam Pressure PSI (0.7bar) - Heating Lad ,000 Kcal/hr - Indr DB C - Indr RH % _ - Outdr DB C - Outdr RH % - Determine entering mixed-air wet bulb : Frm psychrmetric chart n page 16 btain indr and utdr air enthalpy as fllwing : -Entering water temp C Requirements : A.Unit Size. B.Cling Cil specificatin, leaving DB, SHF. C.Heating Cil specificatin, leaving DB. D.Fan Perfrmance, mtr size. E.Unit Dimensin. F.Humidifier Specificatins. Slutin : A -Unit Size : - By cnsidering Air delivery and allwable face velcity f unit, yu can find face area f the unit. When cling cil is part f the unit, the maximum face velcity f unit is.6 m/sec (withut eliminatr after cling cil) and.15 m/s with it. Quick selectin chart n page 6 is very usefull fr selecting On psychrmetric chart the WB f entering mixed air btained, 0.8 C. 1.Frm table, and cnsidering ttal cling lad f 9000 Kcal/hr, fr AAHU- 160, the 6 rws/8 fin per inch cil with nminal cling capacity f Kcal/hr can be chsen..the crrectin factr fr face velcity btain frm table 15. reffering t cil face velcity f.6 m/sec C.F.V =1.01 and the Bypass factr btained frm table 11 s: 1-B.F= =0.955 S the crrected capacity btained as belw : Crrected capacity = = Kcal/hr - Determine Q factr : 1

13 4.Fresh and Return dampers 5. V-Type washable Aluminium filter 6. Bag filter with 85% efficiency Frm table 7, with Q= 6.5 and entering air wet bulb 0.8 C, btained WBut =1.85 C. Then frm psychmetric chart entering air dew pint temp. is 16.5 C and frm table 8 leaving air dry bulb temp btained DBut=1.4 C - SHF determine : Nw, determine pressure lss f air thrw each sectin : 1. Cling cil Frm chart n page 1 fr 6 rws / 8 fin per inch cling cil with.6 m/sec face velcity and SHF = 0.74 yu find : Pcling cil = 14 mm HO. Heating cil Frm chart n page 1 fr rws / 14 fin per inch heating cil with.6 m/sec face velcity and SHF = 1 yu find: Pheating cil = 9.5 mm HO C-Heating cil spec, leaving DB : - Calculating entering mixed-air dry bulb : Frm table 19,0,1 yu can find pressure lss f air thrw ther accessries : Pmixing.bx = mm HO PAluminium filter =.5 mm HO PBag filter =11 mm HO PDamper =1 mm HO Ttal heating lad is kcal/hr. Reffering t table 5 fr AAHU-160 the rws / 14 fin per inch cil have kcal /hr nminal capacity. Frm table 1 and table 15 btain crrectin factrs fr face velcity and entering cnditins. S C.F.V = and C.F.T= 1, s, the crrected capacity btained as belw : Crrected capacity= X1X 11000= 1476 kcal/h - Leaving air DB btained as belw : Heating capacity ( Kcal/hr) = 0.86 air delivery (temp.differance) D-Fan perfrmance, mtr size : The selected Air handling unit has these accessries : 1. cling cil: 6 rws / 8 fin per inch. Heating cil : rws / 14 fin per inch. Mixing bx S the ttal Air pressure lss f unit determine as belw: PInternal= =40.5 PTtal.Static = PInternal+ PExternal= = 70.5 Frm table 9, the crrectin factr fr elevatin and Temperature f ambient,(1010 m abve sea level and +16 C mixed air entering fan sectin) At winter peratin f unit btained S, the crrected ttal static pressure is : Crrected ttal static pressure = 70.5 / = 76.4 mm H O Frm table ( Fan rating ), Caracteristics f fan are as belw : Fan size : 0 0 (0 diameter and 0 width). RPM : 858 Absrbed pwer : 4.94 KW Efficiency : 70% Sund pressure : 9 db 1

14 Actual absrbed pwer at 1010 m abve sea level and +16 C entering air =0.919X4.94=4.5kw(6 hp) and the mtr is =1. ( pwer factr ) X 4.5 Warning : 5.44 kw 5.5 kw If air handling unit is designed fr winter peratin,t prevent ver heating f mtr, the maximum pwer cnsumptin f unit is in cld weather start up. because the air density therefre the pwer absrbed by fan in this case is maximum. S in this case fr 1010 m elevatin abve sea level and 16 C entering air at start up, the crrectin factr btained frm cmparisn f air density in start up and nrmal peratin in winter. S : Densty f air at 16 C = 1.8 kg/m Density f air at +16 C = 1.09 kg/m S, This multiplyer, crrecet the actual pwer cnsumptin f mtr at start up. S we must check the start up running f mtr at winter start : Cmpnents Length(mm) Mixingbx with fresh & return air (1.1)* 860 Pre - filter ( Bag filter) (6.1) Rw Cling cil (7..1.1) 410 Rw Heating cil (7.1.1) 90 Fan Sectin (11.1) 1450 Overall Length 710 * reffer t table 6 F-Humidifier Specificatins: Fr caculating the capacity f humidifier, yu must btain the difference between amunt f water in entering and leaving air frm the unit at winter. NOTICE: At nrmal air cnditining, humidifying dne at winter peratin f unit. Excep few industrial applicatin such as paper, textile, silk belt tire and. that need humidifying in all time. Chart n page 16 shws the psychrmetric prcess f humidifying. As shwn yu can see that in the humidifying prcess with fine spray nzzle r steam grid, the Dry Bulb temperature f air remain cnstant during the prcess. S, at first, determine the water cntent f entering air: Actual start up running = 1.1 x 4.5 = 5.1 Kw < 5.5 Kw S, these calculatin shws that the winter start pwer absrbtin f unit is less than the mtr pwer and it is acceptable. If the winter start up wuld be greater than the mtr pwer, yu must change the mtr pwer ne size larger. E-Unit dimensin and : Frm table 7dimensin f each sectin can be determined fr mdel AAHU -160 : Height = 150 mm Width = 000 mm and length f the unit accrding t length f each sectin can be determain frm table 7 : And then the difference between Wmixed air and Wsupply air (that is the same with rm design ). The capacity f humidifier shuld be determined as belw : Frm table,and cnsidering steam pressure f 10 PSI (0.7 bar) and humidifier capacity f 9.1 Kg/hr mdel H- can be chsen. 14

15 Air washer Selectin Example : Given : Ttal air delivery ,000 m/hr Entering dry bulb temp C Entering wet bulb temp C Requirement : -Unit size Requirement : Internal air temp. Unit size Slutin: We start with class 8 air washer fr this applicatin. The average value f E frm table 9 is 0.9. S, -Leaving air temp. frm unit. -Circulating water rating. Slutin : Frm table 6 and 7 and by cnsidering air delivery mdel AAHU-440 with class 8 air washer is selected. Face velcity in air washer bx is : Frm table 9 with.5 m/sec face velcity, the cling efficiency f air washer is 0.9. Then : The evaprating cling psychrmetric prcess is demnstrated n chart n page 16. yu Knw that in evaprating cling prcess the WB f entering air remains cnstant. S, the cling prcess lie dwn n WB = 5 C line ( reffer t chart ). the supply air cnditin is encunter pint f lines WB= 5 C and DBut =6.6 C (pint ), S, the leaving air RH is 88%. rm prcess lie dwn in RSHF= 1 line, s, encunter pint f hrizntal line frm pint t RH=65%, is the indr design cnditin f air by ther means prcess is rm prcess. S, pint has DB=1.6 C, therefre yu can find the amunt f air delivery by this cnsideratin: If class 6 air washer was selected the cling efficiency E=0.6 and by abve cnsideratin DBut = 7. C Frm table 8 the amunt f Circulating water and recirculating pump specificatin btained. Air Washer Selectin Frm table 6 mdel AAHU-50 is selected and the face velcity is: Example : Given : Sensible lad Kcal/hr Entering dry bulb temp C Entering wet bulb temp C RSHF Relative humidity f indr air % Frm table 9 by cnsidering air washer mdel and face velcity the cling efficiency btained E= 0.94 By repeating the calculatin with E=0.94 ( replace with initial suppse E= 0.9), DB ut = 6.1 C and air delivery reach m /hr 15

16 Example 1 : Cling Prcess Example 1 : Heating Prcess Example 1 : Air Washer Cling Prcess 16

17 Table -Fan Rating (frward) A-AHU MODEl Fan size N. Cil Face Air STATIC PRESSURE (mm HO) Dia-Width f Velcity Delivery (inch) Fan (m/s) (m/hr) RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η AT 10-8 AT 1-9 AT 1-1 AT AT 18-1 AT AT

18 Table -Fan Rating (frward) Cntinue A-AHU MODEL Fan size N. Cil Face Air STATIC PRESSURE (mm HO) Dia-Width f Velcity Delivery (inch) Fan (m/s) (m/hr) RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η AT - AT 5-0 AT x 0-0 AT x - AT x 5-0 AT x 5-5 AT x

19 Table -Fan Rating (Backward) A-AHU MODEL Fan size N. Cil Face Air STATIC PRESSURE (mm HO) Dia-Width f Velcity Delivery (inch) Fan (m/s) (m/hr) RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RDZ 50 RDZ 15 RDZ 15 RDZ 55 RDZ 400 RDZ 450 RDZ

20 Table -Fan Rating (Backward) A-AHU MODEL Fan size N. Cil Face Air STATIC PRESSURE (mm HO) Dia-Width f Velcity Delivery (inch) Fan (m/s) (m/hr) RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RPM KW db % η RDZ 560 RDZ 60 RDZ x (500) RDZ x (560) RDZ x (60) RDZ x (60) RDZ x (710)

21 Table : Chilled water Cling Cils Rating (1000Kcal/hr) Mdel Entering Cling capacity (1000 kcal/hr) Mdel Entering Cling capacity (1000 kcal/hr) Air Delivery Air WB 8Fin/in 14Fin/in Air Delivery Air WB 8Fin/in 14Fin/in (m /hr) ( C) 4Rw 6 Rw 8Rw 4Rw 6 Rw 8Rw (m /hr) ( C) 4Rw 6 Rw 8Rw 4Rw 6 Rw 8Rw H 15.5H 18.6H 1.6H 18.H 1.4H 19 7.F 100.5F 10F 9.8F 10.7F 14.D H.8H 7.1H 19.6H 6.4H 6.8F F148.1F158.8D 140F 150.5D178.D (00) 4 0.8H 8.H.H 6.1H.6H 4.5F (19400) F18.4F 196D 17F 195.7D.D 6 5.6H 4.8H 6.H 1.8H 5.6F 41.5F 6 167F 199D 5.7D 09F 6D 68D 19.8H 1.5F 6.7F.4H 5.9F 1F F1.6D 151D 1F 149.5D 175D H 1.4F 9.7F 5.H 7.8F 44.6F F 185.8D D 159D 15D 48D (4900) 4 4.H 40.8F 49.1F 6.F 48.9F 56.1F (5800) 4 168D 9D 70D 1D 74D 07D 6 4.H 50F 59F 45.4F 59.1F 66.9F 6 06D 78D D 59D 8D 65D H.7F 9.5F 9F 9.F 45.9F 19 10F 176F 188.4D 166F 187D 0D 70.H 49.1F 60F 4.6F 56.F 65F F D 78D 00D 69D 10D (6800) 4 44.F 60.F 7.F 56.1F 71.5F 7.8D (00) D 89D 8.6D 65D 4D 86D F 7.9F 78.D 68.1F 87.1F 88.7D 6 58D 48D 404.8D 6D 411D 458D 19 4H 40.F 48.6F 7F 48.5F 56.F F 0D 44D 185D 45D 8D 85 44F 60F 58.5F 5.4F 71.6F 71.D 440.5D 0D 55D 69D 60D 405D (8100) F 7.7F 78.7D 69.F 78.D 90.6D (4000) 4 78D 7D 44D 49D 441D 488D 6 67.F 79.F 94.6D 84.5F 94.8D 108.D 6 7D 446D 515D 44D 57D 580D 19 5.F 49F 58.5F 44.6F 59.1F 67.8F 19 04F 44D 94D 59F 95D 40D F 7.5F 75D 65.F 88.6F 86.D 50 66D 64D 47D 4D 4D 487D (9700) 4 67.F 79.5F 95.5D 84.7D 95D 110D (48500) 4 5F 447D 51D 40D 59D 589D F 96.F 115D 101.8D114.4D 10.D 6 407D 58D 60D 511D 64D 698D F 60.7F 6.8D 4.5D 71.F 7.4D F 01F 60 F 80 F 64F 416 F F 88.1F 9.7D 6.7D 10.8F 104.5D 60 1F 445F 477 D 418F 51F 56D (11400) F 97.5D 115.D 86.D 15.6F 11.D (58000) 4 414F 491D 589 D 51F 587D 671D F 118D 18.1D 106.6D 149.8F 156.6D 6 50F 597D 706 D 60F 708D 801D F 75F 89.1F 69. F 90.1F 9.7D F 6 F 40 F 9 F 47 F 45 D F 110.F 118.8D 104.1F 11.1D 1.D F 51 F 571 D 508 F 55 D 64 D (14500) F 11.5D 145.6D 19.4F 145.1D 166D (68000) F 596 D 70 D 67 F 707 D 800 D F 147.7D 174.D 1.D 175.8D 198.6D 6 60 F 718 D 845 D 66 D 851 D 955 D Rating are based n, inlet water temperature 7 C utlet water temperature 1 C and Cil face velcity.54 m/sec. Cnsult YEKTA TAHVIEH ARVAND technical ffice fr ther cnditin. F:Full Circuit H:Half Circuit D:Duble Circuit 1

22 Table 4: Direct Expansin Cils Rating (1000Kcal/hr) Mdel 8 fin/inch 14 fin/inch Ent.Air O Entering Air Wet Bulb Temp.( C ) Air Delivery Dry Bulb (m /hr) temp. c 4Rw 6 Rw 4Rw 6 Rw 4Rw 6 Rw 4Rw 6 Rw 4Rw 6 Rw 4Rw 6 Rw (00) (4900) (6800) (8100) (9700) (11400) (14500) (19400) (5800) (00) (4000) (48500) (58000) (68000) Rating are based n 7 C Saturated Suctin temperature and.54 m/sec Cil face velcity. Cnsult YEKTA TAHVIEH ARVAND Technical ffice fr ther cnditin.

23 Table 5: Ht Water Heating Cils Rating (1000Kcal/hr) Mdel 1ROW ROW Fin Air Delivery Entering Air Dry Bulb Temp.( C) Series (m /hr) H 0H 17.6H 1H 44.5H 9.6H 4.6H 6.8H (00) 14 H 8.7H 5H 18.4H 58.6H 5H 45.7H 5.H H H 9H H 64H 57H 50H 8H (4900) 14 5H 47H 41H 1H 85F 75F 66H 50H H 48H 4H H 9F 8H 7H 55H (6800) 14 77F 69H 60H 46H 1F 109F 95F 7H H 58H 51H 9H 11F 99F 87F 67H (8100) 14 9F 8F 7H 59H 149F 1F 115F 90F H 64H 55H 4H 1F 110F 96F 75F (9700) 14 10H 91H 81F 61H 166D 147F 10F 100F H 84H 7H 56H 160F 14F 15H 97H (11400) 14 14F 119H 105H 81H 1F 190F 167F 10H F 108H 94H 7H 05F 18F 161F 15H (14500) 14 17F 15H 14H 104H 71H 4F 1F 167F F 144H 17H 98H 76F 46F 16F 168F (19400) 14 1F 05F 180F 140H 65D 4F 85F H H 195F 171F 1H 7D F 9F 9F (5800) 14 1H 80F 44F 190F 491D 49D 87D 0F F 4F 1H 166H 46F 41F 6F 84F (00) 14 87F 45F 0F 6F 610F 544D 480F 7F F 06F 67F 10H 588D 51F 458F 59F (4000) F 45F 8F 98F 770D 689D 606D 475F H 69H 5H 5H 706F 69F 554F 44F (48500) F 57F 46F 61H 9F 81F 7F 575F F 40H 77H 91H 8F 71F 650F 500F (58000) F 61F 55F 414H 1088D 968D 85F 661F F 508F 448H 47H 971F 867F 76F 595F (68000) F 75F 64F 496F 186D 1147D 1008F 785F Mdel Fin ROW 4ROW Air Delivery Series Entering Air Dry Bulb Temp.( C) (m /hr) H 5H 46H 6H 69H 6H 54H 4H (00) 14 7H 65H 57H 45H 81H 7H 64H 51H F 78F 7H 57H 106.5H 95.5H 8F 64F (4900) F 98F 86F 5.5F 1F 110F 97F 76.5F F 111F 98F 77F 146F 11F 115.5F 91F (6800) F 18F 1F 96F 17F 155F 17F 108F F 14F 118F 9F 175F 157F 19F 109F (8100) F 166F 147F 115F 07F 185F 164F 10F F 16F 14F 111F 11F 188.5F 167F 1F (9700) 14 4F 00F 177F 19F 4D F 197F 156F F 191F 168F 1F 48F 5F 198F 157F (11400) 14 67F 9F 09F 165F 89D 59F 5F 186F F 45F 4F 170F 19F 86F 5F 00F (14500) 14 9F 0F 68F 11F 67D 99F 99F 7F F 7F 89F 7F 415D 7D 7D 56D (19400) F 406F 59F 8F 491D 440D 89D 06D F 440F 89F 06F 560D 501D 44D 48D (5800) F 454F 48F 81F 661D 59D 54D 414D F 551F 487F 84F 701D 67D 554F 450F (00) 14 76F 68F 604F 478F 87D 74D 656D 50D F 69F 611F 48F 881D 790D 698D 550D (4000) F 857F 759F 601F 1040D 9D 85D 654D F 8F 76F 580F 1061D 950D 840D 664D (48500) F 10F 91F 7F 150D 11D 995D 788D F 976F 86F 678F 179F 1145F 101F 801F (58000) F 115F 107F 848F 1468D 150F 1195F 950F F 116F 105F 809F 1508D 15D 101F 950F (68000) F 1444F 174F 1008F 1748D 1565D 185D 119F Rating are based n, Inlet water Temperature 80 C, Outlet Water Temperature 70 C and Cil face velcity.54(m/sec). Fr ther cnditins, rating shuld be crrected by table 1, 15. F:Full Circuit H:Half Circuit D:Duble Circuit

24 Table 6: Steam Heating Cils Rating (1000Kcal/hr) Mdel Steam Entering Air Dry Bulb Temp( C) Air Delivery press (m /hr) (bar) 1Rw Rw 1Rw Rw 1Rw Rw 1Rw Rw (00) (4900) (6800) (8100) (9700) (11400) (14500) Mdel Steam Entering Air Dry Bulb Temp( C) Air Delivery press (m /hr) (bar) 1Rw Rw 1Rw Rw 1Rw Rw 1Rw Rw (19400) (5800) (00) (4000) (48500) (58000) (68000) Rating are based n.5 m/sec cil face velcity and full circuiting ( except ne rw deep steam cils in AHU- 60 t up which are half circuiting ). Fr ther cnditins, rating shuld be crrected by table 1 and 15. 4

25 Table 7: Supply Air cnditin in cling prcess. Q Entering Air Wet Bulb temp. ( c) Kcal/m Table 8: Leaving WB Temp. f supply air. Leaving Air Entering Air Dew Pint temp. ( c) Wet bulb Temp.( C) Leaving Air Dry Bulb temp. ( C)

26 Table 9: Ttal static pressure drp crrectin factr AIR TEMP. ELEVATION ABOVE SEA LEVEL.(M) ( C) Ntice : The meaning f air-temp. is mixed air temp. Table 10:Air density (kg /m) in varius temp. and elevatin ELEVATION(M) AIR TEMP.( C)

27 Table 11: Cling Cils Bypass Factr Tube Rws Fin/in Air Velcity ( m/sec) Table 1: Heating Cils Crrectin Factr (CFT) Entering Water temp ( C) Entering Air Dry bulb temp. ( c ) Crrected capacity = Crrectin factr frm this table capacity frm table 5. 7

28 Table 1 : Steam Heating Cil Crrectin Factr Entering Steam Pressure (bar) Air DB temp. ( C) Table 14: Cling sensible heat factr (SHF) Entering Dry Bulb temp.( C) Entering air Wet Bulb Temp. ( C)

29 Table 15 : Air Velcity Crrectin Factr ( C.F.V) Um/sec CFV Um/sec CFV Um/sec CFV Um/sec CFV Table 16 : Chilled and Ht Water cils Cnnectins ( inch). CHILLED WATER HOT WATER AAHU 8Fin/in 14Fin/in 8Fin/in 14Fin/in Mdel Rws Deep /4 1-1/4 1-1/ 1-1/ 1-1/ /4 1-1/ /4 1-1/4 1-1/ / 1-1/ 1-1/ 1 1-1/4 1-1/ 1-1/ 1 1-1/4 1-1/ 1-1/ / 1 1-1/4 1-1/ 1-1/ 1-1/4 1-1/4 1-1/ 85-1/ -1/ 1-1/4 1-1/ 1-1/ 1-1/4 1-1/ 1-1/ 100-1/ -1/ -1/ -1/ 1-1/4 1-1/ 1-1/ -1/ 10-1/ -1/ -1/ -1/ -1/ -1/ 1-1/ -1/ -1/ -1/ 160-1/ -1/ -1/ -1/ -1/ -1/ 1-1/ -1/ -1/ -1/ 10-1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ 80-1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ -1/ 50 x -1/ x -1/ x -1/ x -1/ x -1/ x -1/ x 1-1/ x x -1/ x -1/ x x x x -1/ 440 x -1/ x -1/ x -1/ x -1/ x -1/ x -1/ x x x -1/ x -1/ x x x -1/ x -1/ 50 x -1/ x -1/ x -1/ x -1/ x -1/ x -1/ x x x -1/ x -1/ x x x -1/ x -1/ 60 4 x -1/ 4 x -1/ 4 x -1/ 4 x -1/ 4 x -1/ 4 x -1/ 4 x 4 x 4 x -1/ 4 x -1/ 4 x 4 x 4 x 4 x -1/ x -1/ 4 x -1/ 4 x -1/ 4 x -1/ 4 x -1/ 4 x -1/ 4 x 4 x 4 x -1/ 4 x -1/ 4 x 4 x 4 x 4 x -1/ 9

30 Table 17 : Steam Cil Cnnectins(in) AAHU SUPPLY CONDENSATE Mdel 1 Rw Rw Rw 1 Rw Rw Rw 5 1-1/4 1-1/4 1-1/4 1-1/ / 1-1/4 1-1/4 1-1/ / 1-1/ 1-1/ 1-1/ / 1-1/ 1-1/ / 1-1/ 1-1/ / 1-1/ 1-1/ / 1-1/ 1-1/ x x x x 1-1/ x 1-1/ x 1-1/ 440 x x x x 1-1/ x 1-1/ x 1-1/ 50 x x x x 1-1/ x 1-1/ x 1-1/ 60 4 x 4 x 4 x 4 x 1-1/4 4 x 1-1/4 4 x 1-1/ x 4 x 4 x 4 x 1-1/4 4 x 1-1/4 4 x 1-1/4 Table 18: Dx Cil Cnnectins(in) AAHU 4ROW 6ROW Mdel SUCTION LIQUID SUCTION LIQUID 5 1-1/8 5/8 1-1/8 7/ /8 1-1/8 1-5/8 1-1/ /8 1-1/8 1-5/8 1-1/ /8 1-1/8 1-5/8 1-1/ /8 1-1/8 1-5/8 1-1/ /8 1-1/8 1-5/8 1-/ /8 1-/8-1/8 1-5/8 10-1/8 1-5/8-1/8 1-5/8 80-5/8 1-5/8-5/8 1-5/8 50 x 1-5/8 x 1-/8 x -1/8 x 1-5/8 440 x -1/8 x 1-/8 x -1/8 x 1-5/8 50 x -1/8 x 1-5/8 x -5/8 x 1-5/ x 1-5/8 4 x 1-/8 4 x -1/8 4 x 1-/ x 1-5/8 4 x 1-/8 4 x -1/8 4 x 1-5/8 Table 19 : Accessries air side pressure drp ( P(mmH O) ) Damper Electrical Heater Air Washer C-6 C-8 Mixing Bx Table 0: Air Pressure Lss In Al.Washable Filters Standard Panel Size(cm) Air Velcity in Filter Face (m/sec) ΔP(mmH O) Dim : 50 x 50 x

31 Cils air side pressure drp (1 thru 10 rws) 1 ROWS ROWS Fin Series Maximum Face Velcity withut water blwff (dse nt apply t A) Air Pressure Drp (mm f water) HEATING COIL 5 COOLING COIL Air Pressure Drp (mm f water) Fin Series E D C B A Face Velcity (m/sec) E D C B A SHR DEGREE OF WETNESS A B C D 0.7 r less E Nte : The letters A,B,C,D r E fllwing the face velcity lndicate the degree f wetness at which the cil wuld be perating. Refer t the chart at the lwer right-hand crner fr the apprpriate degree f wetness. 1

32 Table 1:Air Filters Technical Data Filter Type Pressure Drp Media Efficency Face velcity Eurvent Standard sizes Type (%) Initial Final (m/s) (EU) LxWxT(mm) Descriptin Metalic Pre- filter 500x500x50 Arrest Aluminium x400x x400x50 Permanent washable panel type air filter,cnstructed with crrugated aluminium expanded sheet are being used at the first stage f filteratin.with regards t the size f their mesh situated n the last cancellate plates.these pre-filters are able t filter suspended particles in the air with diameter f 1 t mm and abve. Fiberglass Pre-filter Amerglass r Amercl x600x50 600x00x50 490x490x50 615x490x50 The media cvering the surface f these pre-filter is either amerglass r amercl. The media is plassed inside a strng cardbard frame. Synthetic (Nn-wven) Pre-filter Synthetic (Nn-wven) Materials x600x(50,100) 600x00x(50,100) 490x490x50 615x490x50 The media cvering the surface f these types f pre-filters are prduced frm synthetic nn-wven materials with an ptin t be fitted by a safety wire mesh in zig zag r acarden shape pleated,placed inside f cardbard bxes Bagfilter Plyester x595x(00,600,900) 595x95x(00,600,900) The media r filter clth is usually made f plyester materials with difference thicknesses t suit varius demands f custmers.bag filters are usually used in secnd stage f air handling unites and ther clean places as pre-filter fr HEPA filters. Fine Filters Glass Micr Fiber L=600,900,10,150,180 W=00,600 T=150,00 The paper r media used in these filters are made frm glass micr fiber.media and crrugated aluminium fil separatrs packed in a clip bard r galvanized steel frame. High efficiency particulate air filters(hepa) are designed t arrest particles ranging frm 0. micrn and abve.these filters which have large filtering surface,have made frm glass micr fiber media that are seperated by currugated aluminium fils in rder t facilitate air flw.hepa filters are placed after pre-filters which are designed Hepa Ulpa Glass Micr Fiber L=610,910,10,150,180 W=00,610 T=150,00 t prlng their usuefull life.they are used largly in clean rms,micrbilgical hds,hspitals,pharmaceutical plant,industrial units prducing micr-chips and as a whle in places which the atmsphere air shuld be clean and withut germs. Ultra lw penetratin air filters(ulpa) which micr fiber glass paperes have a mre fine nature are able t arrest fine suspended particles.ulpa filters are used in very clean places and in the industries that certain number f particles f 0.1 micrn allwed t suspend in their atmsphere with regard t the internatinalstandards. Carbn Activated Filters Carbn Active x600x(50,100) 600x00x(50,100) 60x490x50 490x490x50 600x600x(150,00) Activated carbn is made by the pyrgenic decmpsitin f suitable cal and wd in specialsretrts. Active carbn is very effective in adsrbing nn-plar rganic mlecules,particullary slvent.in additin,it has a large capacity t catalytically destry zne a majr cmpnent f smg. Air Washer These type f filter is used in a high cncentratin f airbne particles with size range f 10 t 100 micrn.class 6 type have ne bank and class 8 type have tw bank.

33 Table : Steam Grid Humidifier specificatin Air Handling Unit Mdel Steam Mdel 05 Thru 10 Mdel 160 Thru 80 Mdel 50 Thru 740 press. (bar) Steam Grid Mdels and Capacity ( Kg/hr) H-1 H- H- H-4 H-5 H-6 H-7 H-8 H-9 H-10 H-11 H-1 H-1 H-14 H-15 H-16 H-17 H-18 H-19 H In Special case, use f smaller humidifier pssible. Table :Multizne Specificatin Mdel Nminal Cling cil Spec. Heating cil Spec. Standard Fan Standard Mtr Air Delivery Tube Length Face Area Tube Length Face Area Size(Dia-Width) N N N N Kw * m /hr High (mm) (m ) High (mm) (m ) (inch) * standard mtr pwers based n nminal Air delivery in 75 mm H O ttal static pressure. Fr ther cnditin refer t table fr Mtr sizes and RPM.

34 Table 4 : Ht Water Heating Cils Rating In Multizne ( 1000 Kcal/hr) Mdel Fin 1ROW ROW Air Delivery Series Entering Air Dry Bulb Temp( C) (m /hr) H 17H 15H 11H 8H H 9H H (00) 14 8H 5H 1H 16H 51H 45H 40H 0H H 7H 4H 18H 58H 5H 45.6H 5.5H (4900) 14 45H 40H 5H 6H 75F 67F 57F 44F H 40H 5H 7H 79F 71F 6F 48F (6800) 14 65H 58H 51H 9H 108F 96F 84F 65F H 48H 4H H 96F 85F 75F 58F (8100) 14 79H 71H 6H 47H 10F 116F 10F 79F H 55H 49H 8H 110F 99F 86F 67F (9700) 14 85F 75F 71H 55H 151F 15F 119F 9F H 66H 57H 45H 11F 116F 10F 79F (11400) F 90F 84H 65H 169D 99F 86F 109F H 85H 75H 58H 169F 159F 140F 10F (14500) 14 10F 115F 109H 84H 17D 150F 1F 140F H 111H 97H 75H 0F 196F 17F 14F (19400) F 16H 14H 109H 0F 69F 7F 184F F 14F 15F 96F 85D 66F 7F 18F (5800) 14 4F 08F 18F 19F 91D 47D 04D 5F H 0H 196H 17H 14H 86F 45F 7F (00) 14 0F 0F 69F 4F 180F 86F 45F 7F F 6F 6F 07F 169H 470D 416D 00D (4000) 14 87F 4F 4F 00F 0F 640D 798D 86D F 79F 79F 45F 189F 560D 454D 56F (48500) F 407F 407F 56F 74F 76D 595D 460D H 9F 9F 98H 0H 674F 56F 409F (58000) 14 51F 494F 494F 4H 4H 9F 7F 560F H 40H 40H 5H 74H 797F 64F 486F (68000) F 551F 551F 479F 98H 109D 857F 666F Rating are based n, 80 C inlet water Temperature and 70 C Outlet Water Temperature. Cnsult Yekta Tahvieh Arvand Technical ffice fr ther cnditins. Fr ther cnditin use table 1 and 15 fr crrecting capacity. F:Full Circuit H:Half Circuit D:Duble Circuit 4

35 Table 5: Multizne Steam Heating Cils Rating (1000Kcal/hr) Mdel Steam Entering Air Dry Bulb Temp.( C) Mdel Steam Entering Air Dry Bulb Temp( C) Air Delivery press Air Delivery press (m /hr) (bar) 1Rw Rw 1Rw Rw 1Rw Rw 1Rw Rw (m /hr) (bar) 1Rw Rw 1Rw Rw 1Rw Rw 1Rw Rw (00) (19400) (4900) (5800) (6800) (00) (8100) (4000) (9700) (48500) (11400) (58000) (14500) (68000) Rating are based n.54 m/sec cil face velcity and full circuiting (except ne rw cil in AHU-60 and AHU-740) Fr ther cnditin use table 1 and 14 fr crrrecting capacities 5

36 Cils water side pressure drp By cnsidering ttal cling (r heating) lad f cils,the quantity f water flw shuld be determine by these frmula: Water Flw (lit/sec) = Heating r Ciling lad / ( 59 * T w ). And then by cnsidering the cil circuiting f selected cils(full,half r Duble) that designated in cling and heating cils capacity rating tables,5 by F,H &D,and by these charts,yu can determine waterside flw pressure drps. Example: Fr example 1 determine the water side pressure drp. By cnsidering the cling lad f (kcal/hr) and abve frmula: Cling water flw rate(lit/sec)=9780/59*5 C = 5. lit/sec By cnsidering AAHU-160 with 6 rwsfull circuiting, water pressure drp btained: Water pressure drp =.0 (m H O) By cnsidering the heating lad f 1541 (kcal/hr) and abve frmula: Heating water flw rate(lit/sec)=1541/59*10 C = 6 lit/sec By cnsidering AAHU-160 with rws full circuiting, water pressure drp btained: Water pressure drp =.5 (m H O) Cils water side pressure drp charts PRESSURE DROP (m H0) PRESSURE DROP (m H 0) Half Cir 85 10, ,50 Mdel ,740 10, WATER FLOW RATE (LIT/SEC) Half Cir. Unit Mdel , WATER FLOW RATE (LIT/SEC) 1 Rw Cil Rw Cil 70,85 6 PRESSURE DROP (m H 0) PRESSURE DROP (m H 0) Full Cir Unit Mdel WATER FLOW RATE (LIT/SEC) Full Cir. 10,50 10, , ,50 Unit 440 Mdel , , WATER FLOW RATE (LIT/SEC) 80 10

37 Rw Cils (Cntinue) PRESSURE DROP (m H 0) Duble Cir. Unit Mdel 60,740 50, WATER FLOW RATE (LIT/SEC) Rw Cil PRESSURE DROP (m H 0) Full Cir. Unit Mdel 5 160,60,740 10,50, , WATER FLOW RATE (LIT/SEC) 10,80 PRESSURE DROP (m H 0) Half Cir. Unit Mdel WATER FLOW RATE (LIT/SEC) 4 Rw Cil PRESSURE DROP (m H 0) Half Cir. Unit Mdel 5,50, WATER FLOW RATE (LIT/SEC) PRESSURE DROP (m H 0) Full Cir. Unit Mdel ,85, , , WATER FLOW RATE (LIT/SEC) 70 PRESSURE DROP (mh 0) Duble Cir. Unit Mdel , , WATER FLOW RATE (LIT/SEC) 7

38 6 Rw Cil 8 Rw Cil PRESSURE DROP (m H 0) PRESSURE DROP (m H 0) Half Cir. Unit Mdel WATER FLOW RATE (LIT/SEC) Half Cir. Unit Mdel 5 5 PRESSURE DROP (m H 0) Duble Cir. Unit Mdel 10, WATER FLOW RATE (LIT/SEC) PRESSURE DROP (m H 0) WATER FLOW RATE (LIT/SEC) ,60, PRESSURE DROP (m H 0) Full Cir. Unit Mdel 100, , WATER FLOW RATE (LIT/SEC) Full Cir. Unit Mdel ,50,100 70, , WATER FLOW RATE (LIT/SEC) ,740 PRESSURE DROP (m H 0) Duble Cir. Unit Mdel 160,60 100,10, , WATER FLOW RATE (LIT/SEC) 8

39 TABLE 6 : CLASS 6 AIR WASHER SPECIFICATION AIR FACE WATER MODEL DELIVERY AREA FLOW NO.OF A B F K DISCHARGE SUCTION DRAINQUICK FILL MAKEUP OVER FLOW HEAD PUMP SPECIFICATION NOZZLE KW RPM (M /HR) (M ) GPM M /HR (MM) (MM) (MM) (MM) (IN) (IN) (IN) (IN) (IN) (IN) (M HO) /4 1-1/ /4 1/ 1/ 1-1/ /4 1-1/ /4 1/ 1/ 1-1/ / /4 1/ 1/ 1-1/ / 1 /4 /4 1-1/ / 1 /4 /4 1-1/ / 1 /4 /4 1-1/ / 1 /4 / / 1-1/ /4 / / 1-1/ /4 / / 1-1/ /4 / /4 / /4 / / / TABLE 7 :CLASS 8 AIR WASHER SPECIFICATION AIR FACE WATER MODEL DELIVERY AREA FLOW NO.OF A B F K DISCHARGE SUCTION DRAINQUICK FILL MAKEUP OVER FLOW HEAD PUMP SPECIFICATION NOZZLE KW RPM (M /HR) (M ) GPM M /HR (MM) (MM) (MM) (MM) (IN) (IN) (IN) (IN) (IN) (IN) (M HO) / /4 1/ 1/ 1-1/ / /4 1/ 1/ 1-1/ / /4 1/ 1/ 1-1/ / 1 /4 /4 1-1/ / 1 /4 /4 1-1/ / 1 /4 /4 1-1/ / 1 /4 / / 1-1/ /4 / / /4 / / /4 / /4 / /4 / / / Nte: 1-The mdel f selected pumps are based n KSB centrifugal pump. -In all cases,pump with 1450 RPM mtrs are available. 9

40 Air Washer Dimensin Class 6 B 1800 A INLET LOUVRES. Access Dr ELIMINATORS. Discharge Quick fill Makeup Over flw F Suctin Drain K Class K F A INLET LOUVRES. Discharge Suctin Access Dr Quick fill Makeup Over flw Drain ELIMINATORS. Discharge 40

41 TABLE 8 :WATER FLOW,EVAPORATION, BLEED OFF AND MAKE UP RATE OF AIR WASHER MODEL WATER EVAPORATION BLEED MAKE WATER EVAPORATION BLEED MAKE FLOW RATE OF RATE UP RATE FLOW RATE OF RATE UP RATE M /HR LIT/MIN LIT/MIN LIT/MIN M /HR LIT/MIN LIT/MIN LIT/MIN CLASS 8 CLASS 6 RATING ARE BASED ON DB=5 C,WB=1 C &AIR VELOCITY=.5 ( m/sec) TABLE 9 : Air Washer Efficiency class 8 class 6 Mdel Air Velcity (m / Sec) , , ,10,160, , , ,

42 Water Treatment Evapratin cling is accmplished by the evapratin f a prtin f the water being recirculated.as this water evaprates,the disslved slids riginally present in the water remainin the system.thus,the cncentratin f disslved slids in the circulating water increases rapidly and cntinues as lng as the unit is in peratin. If this buildup is nt cntrled,cncentratins can rapidly reach levels f 750 t 1000 times the cncentratin in the riginal supply water. Additinally,the recirculating water is ften further cntaminated by airbne impurities that may be present in the vicinity f the unit such as chemical fumes in an industrial area r salt near the castline. If the cncentratin f these disslved slids and impurities is nt cntrled,scaleing, sludge, r crrsin can ccur which will reduce the perating efficiency and shrten the life f the equipment. T prevent an excessive buildup f impurities in the circulating water, it is recmmended that a small amunt f water be bled frm the unit at a rate f 0.00 (m /hr) water per 1000 (m /hr) air delivery, is satisfactry fr the usual perating cnditins in mst lcatin. In many lcalities, this cnstant bleed and replacement with fresh water will keep the cncentratin f impurities in the system at an acceptable level. The evapratin rate can be determined by the fllwing: evapratin rate (m /hr) =air delivery (m /hr )w -w (kg / kg )/ air specific vlume (m /kg) ρ ( kg/m ) 1 misture dry air water Example: Given : Air delivery (m /hr) DBin C WBin C Air velcity (m/sec) Air Washer Class 8 Slutin: With reference t table 5 air washer efficiency=0.84 thus DB ut=. C & WB ut=1 C.Frm psychrmetric chart W =.0097 (kg /kg ), W = (kg /kg ) & Air specific vlume = 0.885(m /kg) in misture dry air ut misture dry air Evapratin rate(m /hr)=4000 x ( )/(0.885 x 1000)=0.0 Bleed ff rate (m /hr)=(4000/1000) x 0.00=0.009 Makeup rate(m /hr)=evapratin rate+bleed ff rate= =0.01 Table 8 shwes the rate f Evapratin,Bleed ff &Makeup water fr all ARVAND AIR WASHERS. CHEMICAL TREATMENT If the cnditin f the water is such that cnstant bleed-f f will nt cntrl scale r crrsin,chemical treatment may be necessary.if a water treatment prgram is used it must meet the fllwing requierments: 4

43 1. The chemical must be cmpatible with galvanized (zinc cated) steel. Water treatment chemicals which are cmpatible with galvanized steel are als satisfactry fr the Zinc Chrmatized Aluminium finish.. The PH f the circulating water must be maintained between 6.5 and 8.5. Chemicals shuld be fed int the recirculated water, but nt int the cld water sump,n a cntinius metered basis t avid lcalized high cncentratins which may cause crrsin.these chemicals are nrmally fed int the pump discharge line. Batch feeding f chemicals des nt affrd adequate cntrl f water quality and is nt recmmended. 4. Acid water treatment is nt recmmended. Fr specific recmmendatins n water treatment, cntact a cmpetent water treatment supplier. 4

44 Table 0 : Hrizntal Air Handling Unit Dimensins & Weights. Mdel A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) G(mm) H(mm) I1(mm) I(mm) J(mm) Weight (Kg) x x Table 1 : Vertical Air Handling Unit Dimensins & Weights Mdel A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) G(mm) H(mm) I(mm) J(mm) Weight(Kg)

45 A G B D I J C H E I1 I I1 J J C F D E H A B F I C B J A H G D E H A I J C B D F E J F Typical Vertical Air Handling Unit 45 Typical Hrizntal Air Handling Unit

46 Table : L-Type Air Handling Unit Dimensins and Weight Mdel A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) G(mm) H(mm) I1(mm) I(mm) J(mm) K(mm) L(mm) Weight (Kg) x x Table : Multizne Air Handling Unit Dimensins and Weight Mdel A(mm) B(mm) C(mm) H(mm) I1(mm) I(mm) J(mm) K(mm) L(mm) M(mm) Weight (Kg) x x

47 I J I1 D E G C B H K L I1 J I J H K L C B E D F F A A C B I1 J I L C J I1 J I B M M K M M L A H A H K Typical L-Type Unit Typical Multi-Zne Unit 47

48 Table 4 :Class 6 Air Washer Dimensins & Weights Mdel A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) G(mm) H(mm) I1(mm) I(mm) J(mm) K(mm) L(mm) Weight(kg) Shipping Operating x x Table 5 :Class 8 Air Washer Dimensins & Weights Mdel A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) G(mm) H(mm) I1(mm) I(mm) J(mm) K(mm) L(mm) Weight(kg) Shipping Operating x x I J I J J I1 I1 A C O I L A C O I L H L D B E F K C H L G B D E F K C 48

49 Typical Ht &Chilled Water Cil Piping Diagram -With Main & Auxillary Recirculating Pump. Gate valve Thermmeter ~ ~ Way Cntrl valve Diverting valve Vent Heating & Cling Cil Strainer Circulating Pump Unin -With Main Pump. Drain When Several Air Handling Unit in Different Distance are Cnnected t One Water Supply Unit (Engine Rm). It is Recmmended t Use an Auxillary Pump Near each Air Handling Unit. Gate valve Thermmeter ~ ~ Way Cntrl valve mixing valve Vent Strainer Unin Drain 49