400-3.0-decoupler

Transcript

Air Elimination Control 5900 FlexBalance and 5900 FlexBalance~Plus Series Separators Taco’s aco’s patented 5900 FlexBalance and FlexBalance~Plus Separators act as a s a hydraulic bridge between the primary and secondary circuits in hydronic heating and cooling applications. The FlexBalance~Plus product line incorporates Taco’ Taco’ss patented Pall Ring technology te chnology or deep micro-bubble and dirt removal. All Taco FlexBalance FlexBal ance Separators Separa tors are designed, designed , manuactured manuac tured and tested to the requirements requiremen ts o ASME Section VIII, Div 1. This Green Building Build ing riendly series se ries provides improved system syst em energy energ y efciency, allowing the use o smaller pumps or each system circuit. The FlexBalance Series features Internal Baffles 5900 FlexBalance~Plus Series features Pall Rings FlexBalance Separator  5900 FlexBalance~Plus Separator  ©Taco Catalo g #400-3. 0 Supersedes: Working Copy Effective Date: 09/12/08 Printed in USA Features and Benefts Improve comort and reduce cost. High efciency cleaning o air and dirt. Improve comort and system perormance. • Achievehydraulicseparation between primary and secondary circuits. • Preventhydrauliccouplingofpumpsor pumps in series in primary secondary confgurations. • Preventunanticipatedorghostowsin connected primary and secondary circuits. • Controlsystemisnotaffectedbyowin a connected circuit. Reduce installed costs • IntegralPALLRINGmicrobubblehigh efciency air and dirt separator in the Plus series eliminates separate air separator. •Requireslessmechanicalroomspacethan separate components. •Integralairvent. •Optional½”temperature/pressureports on all nozzles. Reduce operating costs • PressuredropofFlexBalanceislessthan separate feld installed components. PALLringtechnologyhasbeenusedformanyyears intheprocessingindustry.Taco’sapplicationofPALL rings to hydronic air and dirt separation is new to the HVACindustry.Whileairbubblesareseparatedby thePALLringsthroughaprocessknownascoales cence, dirt particles are actually caught and sited to thebottomofthetank,wheretheycanberemoved through a blowdown valve. The 5900 Series provides higher efciency, with reduced pressure drops, so a somewhat smaller pump may be used or maximum efciency. Patented Pall Ring micro-bubble separation technology WhenwaterisbroughtintocontactwithaPALLRING, thestreamisdeectedinmanydirections.Microbubbles attach to the ring surace by coalescence growing large enough to be separated. Pall Rings LargenumberofPALLRINGSinthe 5900 FlexBalance~Plus Series separator yields a virtually air-ree system water. Superior air bubble removal    )   m      m    (   s   n   o   r   c    i   m   n    i   e   z    i    S   e    l    b    b   u    B   r    i    A Taco 5900 The 5900 series separators remove up to 99.6% o the disolved air through the action o coalescence. This eature is especially benefcial in correcting problems in air entrained systems. 2 Air Separator 5 Applications Primary Secondary Pumping Primary secondary pumping is used extensively in HVACsystemstohydraulicallyisolatedifferentcir cuits in the same hydronic system. This can be useul to save energy by shutting o or reducing the speed o pumps in areas o the system with no or low loads. This can also be useul to increase comort by supplying areas o a system with differentwatertemperaturesordifferentowrates. Tosuccessfullyaccomplishthesetaskstheowrates o these dierent circuits must be independent o  eachother,i.e.,theowinonecircuitmustnotaffect theowinanothercircuit.Thisisknownasdecou pling or hydraulic separation. To decouple or hydraulically separate on circuit rom another, an area o very low pressure drop must be created in the common piping between the two circuits. This pipe sometimes reerred to as the decoupler or hydraulic separator. This decoupler must be as short (tee to tee) as possible to insure that the pathofleastresistancefortheowofwaterofone circuit is through the decoupler and not through the opposing connected circuit. Ifthisdecouplerisinstalledcorrectlythentheowin onecircuitdoesnotaffecttheowintheothercircuit.Theowineachcircuitisonlyafunctionofthe pumpheadinitscircuit.Thisowisnotinuencedby the pumps in the opposing circuit being in series with the pumps in its circuit. Thereare3combinationsofowandtemperature possible depending on the relationship o the primary andsecondaryowrates. Figure 2 shows the relationship or the primary (Q primary)andsecondary(Qsecondary)owequal. In this instance the secondary circuit supply temperature is equal to the primary circuit supply temperature. For example a building secondary circuit supply water temperature will be the same as a boiler or chiller primary circuit supply water temperature. This decoupler or common pipe is shown in Figure 1 in red. Secondary  Circuit 2 Tees Secondary  Circuit Pump Primary  Circuit Decoupler (in red) as short as possible Figure 1 — Decoupler  Figure 2 3 Applications T4= (Q — Q2)T1+(Q3)T3 1 Q1 Figure 3 T2= (Q3 — Q1)T3+(Q1)T1 Q3 Figure 4 Figure3showstherelationshipiftheprimaryow (Qprimary)isgreaterthanthesecondaryow (Q secondary). perature.Thisisbecausesomeofthesecondaryow mixeswiththeprimaryowanddilutesthesupply water temperature to the secondary circuit. In this instance the secondary circuit supply temperature is the same as the primary circuit temperature. For example a building secondary circuit supply water temperature will be the same as a boiler or chiller primary circuit supply water temperature. This can cause system perormance problems, especially in chilled water systems, since the building secondary supply water temperature cannot be maintained at the chiller primary supply water temperature. Figure4showstherelationshipiftheprimaryow (Qprimary)islessthanthesecondaryow (Q secondary). This can result rom staging o o multiple boiler or chillers while maintaining a constant volume building secondarycircuitowrate. In this instance the secondary circuit supply temperature is less than the primary circuit temperature. For example a building secondary circuit supply water temperature will be lower than a boiler and higher then the chiller primary circuit supply water tem- This application can also be used or low mass boilersthathaveowlimitsbelowthebuildingsecondary owrate.Inthisapplicationsystemwaterisbypassed aroundtheboilertolimittheboilerowtomanufac turer’smaximumows. 4 Applications Types o Pre-Manuactured Decouplers/Hydraulic Separators 5900 FlexBalance Separator Taco has developed several pre-manuactured decouplers or hydraulic separators that insure hydraulic isolation o connected hydronic circuits. Use o manuactured units insures not only hydraulic isolation o  connected circuits rom improperly feld installed tees, but also saves installation and feld labor costs. Twin Tee® This separator oers a low pressure decoupler or common pipe between two circuits. To achieve this low pressure region theoptimumvelocityoftheow entering the Separator should be 6.6 ps and the velocity in the Separator should be .66 ps. Forsmallerpipeupto6” in diameter when connecting terminal units up to2-1/2”branchcirciuts to single pipe systems Taco oers our patented Twin Tee as shown in Figure 5. Secondary  Circuit A typical piping schematic or the Hydraulic Balancer Separator in a multiple chiller application is shown in Figure 6. Controlled Distance (Max. 1”) Secondary  Circuit Pump Primary  Circuit Weofferourpatented5900FlexBalanceSeriesSepa rator or larger pipe beyond the capability o a Twin Tee. In addition it can be used or connecting generation equipment such as boilers and chillers to primary piping systems. It can also be used or applications where air removal is desired. Our5900FlexBalanceSeparator meets this confguration. The system water passes directly through to the chiller circuit without impacting into a Bull Head tee. In addition, the distance between the connections in the bypass is at least 10 pipe diameters. Twin-Tee® Figure 5 — Twin-Tee Decoupler  5900 FlexBalance~PLUS Combination Air-Hydraulic Separator  CP- FAN COIL CP- FAN COIL CP- FAN COIL P-1 FAN COIL FAN COIL P-CH-2 FAN COIL P-CH-1 P-2 ET-1 CH-2 CH-1 Figure 6 — Multiple Chillers 5 Applications Withanyprimarysecondarypipingarrangement the piping o the common or decoupler bypass pipe between the primary and secondary circuits is o  importance. For chilled water systems this piping is o prime importance to maintain system perormance. A common problem in large chilled water systems is bypassing o warm return water to mix with the supply water rom the chillers.This results in chilled water supply water temperatures to the system above the chiller supply water temperature. (See Figure 7) From Chillers The solution to this problem is to abandon the classic low pressure bypass arrangement and connect the bypass as shown in fgure 9. In this case the tee is rotated so that the system water passes directly to the chiller circuit and not into a Bull Head tee. In addition it is recommended that the distance between the tees in the bypass be at least 10 pipe diameters. From Chillers To System Minimum 10 Pipe Diameters To Chillers To System Figure 9 — Recommended Bypass Piping  Low Pressure Bypass or  Common Pipe 5900 FlexBalance~Plus Separator From system To Chillers Figure 7 — Low Pressure Bypass This is the classic low pressure bypass or a primary secondary piping connection. In this case the arrangement results in a Bull Head tee confguration or the system return water. Inlargerpipe,especiallyover8”,thesystemwater impacts orceully with the Bull Head tee. As a result someofthereturnwaterisforcedbackwardsthrough the bypass. This is sometimes reerred to as diusion. This is illustrated is fgure 8. 5900 FlexBalance Plus Separator includes the use o  PALLRINGSforthecoalescenceofmicroairbubbles aroundthePALLRINGStoseparatefrefromasystem uid.The5900Plusseriesincorporatesthehighest available coalescence surace area available on the markettoday.Thisenhancedsurfaceareaallowsthe removal o microbubbles as small as 18 microns in diameter. Cone-shaped air chamber Area where the air is collected From System Impact of water into Bull Head tee causes reverse flow in bypass To Bypass To Chillers Bull Head Tee Figure 8 — Reverse Flow or Diffusion in Bypass The mixing o warm return water with supply water rom the chillers will result in chilled water supply water temperatures to the system above the chiller supply water temperature. In one larger system the chillers’ supply temperature was 40˚F. However, the supply water temperature to the system was 46˚F. 6 From system Basket with PALL RINGS for air separation Basket with PALL RINGS for dirt separation Collection area for dirt particles Drainage tap for removing particles that are heavier than water Selection Procedure Selection Examples Example 1: Example 2: Problem: Problem: Select a hydraulic separator or a new installation. The hydraulic separator will be installed between a chiller primary pumping circuit and a building loop secondary pumping circuit Select a hydraulic separator or an existing installation with air entrainment and dirt problems.The system has less than average maintenance. Conditions: Conditions: Flow rate = 700 gpm Pipesize=6” Flow rate = 150 gpm Pipesize=3” Pipe Velocity = 6.5 ps Pipe Velocity = 7.8 ps Selection Procedure: Selection Procedure: 1. Determine the type o hydraulic separator required. I no air removal is required this would require a Taco 5900 Series FlexBalance Separator. 2. Determine the pipe velocity range o the 5900 Series that is suitable or these conditions. The optimal pipe velocity range or the 5900 is 6.6 ps. The velocity in the6”speciedpipesizeis7.8fps.This exceeds the recommended pipe velocity o  6.6fps.Therefore,selectan8”pipesizeunit. This pipe velocity = 5.5 ps. 3. Determine the shell velocity range o the 5900 Series that is suitable or these conditions. The recommended shell velocity range or the 5900 is .66 ps. The shell diameterforan8”pipesizeunitis24”. Theshellvelocityat24”shelldiameter is .5 ps. This is within the recommended shell velocity.Therefore,selectan8”pipesizeunit model 5908A. 1. Determine the type o hydraulic separator required. For removal o micro air bubbles and dirt this would require a Taco 5900 Series FlexBalancePlusSeparatorwithintegralPALL RINGSfor air and dirt removal 2. Determine the pipe velocity range o the 5900 Series that is suitable or these conditions.The recommended pipe velocity range or the 5900is6.6fps.Thevelocityinthe3”specied pipe size is 6.5 ps. This is within the recommended pipe velocity o 6.6 ps. Therefore, selecta3”pipesizeunit. 3. Determine the shell velocity range o the 5900 Series that is suitable or these conditions. The recommended shell velocity range or the 5900 is .66 ps. The shell diameter or a3”pipesizeunitis103/4”.Theshell velocityat103/4”shelldiameteris.5fps.  This is within the recommended shell velocity. Therefore, selecta3”pipesizeunitmodel 5903P Plus. 7 Submittal Data # 401-080 Supersedes:Working Copy 5900 FlexBalance Submittal Data Effective: 09/12/08 Features US Patent# 7,117,888 Manuactured to ASME Section VIII Div. 1 Energy Saving Green Product Speciications Working Pressure: 125 psi @ 270˚F (150psi@270˚FOptionAvailable) Internal Body Diameter: 3X the cross-sectional area o the combined entering nozzle area. Connection Options: Flanged,threaded(upto3”)andVictaulic available. Available Sizes: 2”thru12” Each separator is equipped with a brass conical shaped air venting chamber designed to minimize systemuidfrom ouling the venting assembly. 5900 FlexBalance Series Dimensions & Weights: Pipe Size Model Number  A B C D E K Dia. (Inch) Max. (Inch) Approx. Weight (Inch) (Inch) (Inch) (Inch) (LBS.) 2 5902A 6-5/8 35 13-3/4 7-7/8 19-1/4 --- 100 2-1/2 59025A 6-5/8 40 13-1/4 7-1/2 25 --- 110 3 5903A 10-3/4 50 17-1/2 10-3/8 29-1/4 --- 180 4 5904A 10-3/4 59 20 10-1/2 38 --- 205 5 5905A 14 77 23 15-1/4 46-1/2 --- 365 6 5906A 18 90 27 16-7/8 56-1/4 14 500 8 5908A 24 120 34-1/2 23-3/8 73-1/4 14 890 10 5910A 30 151 41-1/4 29-1/2 92 14 1350 12 5912A 30 168 42-3/4 29 110 14 1450 Designed and constructed per ASME Section VIII Div. 1 8 All dimensions shown are subject to change andshouldnotbeusedforpre-piping.Contact your local Taco representative should certifed dimensional drawings be required. Submittal Data # 401-082 Supersedes:Working Copy Effective: 09/12/08 5900 FlexBalance~Plus Submittal Data Features US Patent# 7,117,888 Manuactured to ASME Section VIII Div. 1 Energy Saving Green Product Speciications Working Pressure: 125 psi @ 270˚F (150psi@270˚FOptionAvailable) Internal Body Diameter: 3X the cross-sectional area o the combined entering nozzle area. Connection Options: Flanged,threaded(upto3”)andVictaulic available. Available Sizes: 2”thru12” Each separator is equipped with a brass conical shaped air venting chamber designed to minimize systemuidfrom ouling the venting assembly. 5900 FlexBalance~Plus Series Dimensions & Weights: Pipe Size Model Number  A B C D E K Dia. (Inch) Max. (Inch) Optimum Flow Surface Area* Approx. Weight (Inch) (Inch) (Inch) (Inch) (GPM) (Sq. Ft.) (LBS.) 2 5902P 6-5/8 33 13-3/4 8-5/8 15-3/4 --- 63 7.7 130 2-1/2 59025P 6-5/8 33 13-1/4 8-5/8 15-3/4 --- 63 7.7 140 3 5903P 10-3/4 50 17-1/2 12-3/4 24-1/2 --- 173 33.9 240 4 5904P 10-3/4 50 20 12-3/4 24-1/2 --- 173 33.9 265 5 5905P 14 75 23 21-1/4 32-1/2 --- 293 58.7 460 6 5906P 18 88 27 23-1/2 41 14 499 129.5 650 8 5908P 24 119 34-1/2 32 55 14 896 282.4 1210 10 5910P 30 153 41-1/4 40-1/8 72-3/4 14 1409 455.5 1880 12 5912P 30 153 42-3/4 40-1/8 72-3/4 14 1409 455.5 1980 Designed and constructed per ASME Section VIII Div. 1 *TotalCoalescence(PallRing)SurfaceArea All dimensions shown are subject to change andshouldnotbeusedforpre-piping.Contact your local Taco representative should certifed dimensional drawings be required. 9 Mechanical Specifcations SECTION 15181 - HYDRONIC SPECIALTIES PART 1 - GENERAL 1.1SECTIONINCLUDES A. Hydraulic Separators 1.2RELATEDSECTIONS A. Section - Plumbing Piping Specialties: B. Section - Hydronic Piping. 1.3REFERENCES A. ASME (BPV VIII, 1) - Boiler and Pressure Vessel Code, SectionVIII,Division1-Rulesfor Construction ofPressureVessels; The American Society o Mechanical Engineers; 2004. 1.4SUBMITTALS A. See Section 01300 - Administrative Requirements, or submittal procedures. B. Product Data: Provide product data or manuactured products and assemblies required or this project. Include component sizes, rough-in requirements, service sizes, and fnishes. Include product description, model and dimensions. C.Certicates: Inspectioncerticatesfor pressure vessels rom authority having  jurisdiction. D. Manuacturer’s Installation Instructions: Indicate hanging and support methods,  joining procedures. E. Project Record Documents: Record actual locations of ow controls. F. Maintenance Data: Include installation instructions, assembly views, lubrication instructions, and replacement parts list. 1.5QUALITYASSURANCE A.  ManufacturerQualications:Company specializing in manuacturing the type o  products specifed in this section, with minimum fve years o documented experience. 10 1.6DELIVERY,STORAGE,ANDHANDLING A. Accept valves on site in shipping containers with labeling in place. Inspect or damage. B. Provide temporary end caps and closures on piping and fttings. Maintain in place until installation. C. Protectpipingcomponentsfromentryof oreign materials by temporary covers, completingsectionsofthework, andisolating parts o completed system. 1.7MAINTENANCESERVICE A. Contractor to furnish service and maintenance or one year rom date o  substantial completion. 1.8EXTRAMATERIALS A. See Section 01400 - Quality Requirements, or additional provisions. PART 2 - PRODUCTS 2.1HYDRAULICSEPARATORS A. Manuacturers: 1. Taco,Inc.; 5900(size andcapacityas called or on plans). 2. Calef 3. Substitutions: See Section 01600 Product Requirements. B. Hydraulic Separator device shall be constructed o steel. It shall be designed, abricated and stamped per ASME Section VIII Division1withamaximumworkingpressure o 125 psi at 270°F. Manuacturer shall be holder o ASME U stamp. Manuacturer to have optional 250 psi and 150 psi ASME units available. C. Unitsprovided with anged system connections as standard. Inlet and outlet connections to the primary and secondary circuits to be on the same side o the unit. D. Each hydraulic separator device shall be equipped with a brass conical shaped air venting chamber designed to minimize system Mechanical Specifcations uidfromfoulingtheventingassembly.The air vent shall be able to be closed to allow ushingandpurgingofdirtviasideportwith out dirt passing through vent on initial system fll. E. Abrassushingcockshallbelocatedonthe side o each separator to acilitate system fast-llandremovaloftheoatingimpurities rom the air system interace within the separator. F. A blow down valve shall be provided by the unit manuacturer on the bottom o each unit toallowblowdownandcleaning. Onunits 2½”andsmallerthevalveandallofitsttings shallbe1”. Onunitsthree3”andlargerthe valveandallopeningsshall be 2”. G. The integral air and dirt separator shall remove air down to 18 microns and shall removedirt/debrisdownto35microns.The unit shall be 100% efcient at removing dirt down to 90 microns in 100 passes or less. H. The unit manuacturer shall provide the owner and design engineer third party independent test data certiying that their unit perorms to the above standards. Suppliers not providing these independent perormance test results will not be acceptable. I. The integral air and dirt separator shall employ the use o high surace area pall rings to achieve optimal separation o air and dirt with minimal pressure drop. The pall rings shall be made o stainless steel. Stainless steel will be the only acceptable material used or suppressing turbulence and increasing surace area or high efciency air and dirt removal. Inerior materials o construction such as copper or the straining medium will not be acceptable. J. Manuacturer must have at least 15 years o  experience with microbubble coalescing and dirt removal technology. K. (OPTIONAL)Theunitshallbemanufactured with a removable cover to acilitate removal, inspection, and cleaning o the pall ring basket.Theentirepallringbasketshallbe constructed o stainless steel. For saety and ease o service the unit shall be accessed rom the top and the pall ring basketshallbeaccessedasonecomplete assembly housed in a stainless steel cage. PART 3 - EXECUTION 3.1INSTALLATION A. Install specialties in accordance with manuacturer’s instructions. B. Wherelargeairquantitiescanaccumulate, provide enlarged air collection standpipes. C. Providemanualairventsatsystemhighpoints and as indicated. D. For automatic air vents in ceiling spaces or other concealed locations, provide vent tubing to nearest drain. E. Hydraulic separator to be installed between a primary and secondary piping circuit. F. Provide valved drain and hose connection on strainer blow down connection. ENDOFSECTION15181 Chilledwaterunit:Theminimum allowable surace area o the straining medium shall be ____ sq t or the ______model. Hot water unit: The minimum allowable surace area o the straining medium shall be ____ sq t or the ______model. 11 Taco quality through & through Hydronic professionals everywhere trust Taco for the highest quality systems, components, technology, and support. Visit taco-hvac.com for more information on FlexBalance, FlexBalance~Plus, additional products, systems, software & training. TacoInc.,1160CranstonStreet,Cranston,RI02920/(401)942-8000/Fax(401)942-2360 Taco(Canada)Ltd.,6180OrdanDrive,Mississauga,OntarioL5T2B3/(905)564-9422/Fax(905)564-9436 www.taco-hvac.com