Transcription

TECHNICAL MANUALTTECHSWastewaterTechnical ManualFOR GOULDS WATER TECHNOLOGY, BELL & GOSSETT,RED JACKET WATER PRODUCTS AND CENTRIPRO

WastewaterGoulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProIndexFRICTION LOSSTERMS AND USABLE FORMULASPlastic. 3Steel. 4Fittings. 5Definitions. 14Basic Formulas. 14PIPE VOLUME AND VELOCITYStorage of Water in Various Size Pipes. 5Minimum Flow to Maintain 2 Ft./Sec. 5SEWAGE PUMPSizing and Selection. 6ELECTRICAL DATAAgency Listing / Removing Plug Letters. 10Transformer Sizes. 10Three Phase Unbalance. 11NEMA Panel Enclosures. 12DETERMINING FLOW RATESFull Pipe Flow. 13Pipe Not Running Full. 13Discharge Rate in Gallons per Minute. 13PAGE 2TYPICAL INSTALLATIONSSump. 16Effluent and Sewage. 17VARIABLE SPEED DRIVESWastewater Pumps. 18PANEL LAYOUTS AND WIRING DIAGRAMSDuplex Single Phase. 20Duplex Three Phase. 22Simplex Three Phase. 24Simplex Single Phase. 25Switch Diagrams. 27Sewage Control Panels and Switches. 28

WastewaterGoulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProFriction LossPLASTIC PIPE: FRICTION LOSS (IN FEET OF HEAD) PER 100 FT.3 .246360 36.348.832.69.71.33.108480 63.7115.184.581.19.55.1710600 .52.22201,200 86.9425.076.392.94.86.36.13251,500 38.419.714.441.29.54.19301,800 13.626.261.81.75.26352,100 18.178.372.421.00.35.09402,400 23.5510.703.111.28.44.12452,700 PAGE 3

WastewaterGoulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProFriction LossSTEEL PIPE: FRICTION LOSS (IN FEET OF HEAD) PER 100 FT.3 80 10.002.50.77424054.90 17.104.211.30.34530083.50 25.806.321.93.51.246360 36.508.872.68.70.33.107420 48.70 11.803.56.93.44.138480 62.70 15.004.541.18.56.179540 18.805.651.46.69.2110600 23.006.861.77.83.25.11.0412720 32.609.622.481.16.34.15.0515900 49.70 14.703.741.75.52.22.08201,200 86.10 25.106.342.94.87.36.13251,500 38.609.654.481.30.54.19301,800 54.60 13.606.261.82.75.26352,100 73.40 18.208.372.421.00.35402,400 95.00 04,20068.8031.308.863.631.221006,00062.20 17.407.112.391509,00038.00 15.405.1420012,00066.30 26.708.9025015,00090.70 42.80 14.1030018,00058.50 19.2035021,00079.20 26.9040024,000103.00 33.9045027,000130.00 42.7550030,000160.00 52.5055033,000193.00 63.2060036,000230.00 000184.001000 60,000204.00PAGE 224.256.291.328.368.410.455.500

Goulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProWastewaterFriction LossEQUIVALENT NUMBER OF FEET STRAIGHT PIPE FOR DIFFERENT FITTINGSSize of fittings, Inches½"¾"1"1¼"1½"2"2½"3"4"5"6"8"10"90 Ell45 EllLong Sweep EllClose Return BendTee-Straight RunTee-Side Inlet or Outletor Pitless AdapterBall or Globe Valve OpenAngle Valve OpenGate Valve-Fully OpenCheck Valve (Swing)In Line Check Valve(Spring)or Foot .539220.0110.04.55246812141923324358Example:(A) 100 ft. of 2" plastic pipe with one (1) 90º elbow and one (1) swingcheck valve.90º elbow – equivalent toSwing check – equivalent to100 ft. of pipe – equivalent to5.5 ft. of straight pipe13.0 ft. of straight pipe100 ft. of straight pipe118.5 ft. Total equivalent pipeFigure friction loss for 118.5 ft. of pipe.65(B) Assume flow to be 80 GPM through 2" plastic pipe.1. Friction loss table shows 11.43 ft. loss per 100 ft. of pipe.2. In step (A) above we have determined total ft. of pipe to be 118.5 ft.3. Convert 118.5 ft. to percentage 118.5 100 1.1854. Multiply 11.43x 1.18513.54455 or 13.5 ft. Total friction loss in this system.PIPE VOLUME AND VELOCITYStorage of Water in Various Size PipesPipe Size11 411 2234Volume inPipe SizeGallons per Foot.066.098.1610.3612.652Minimum Flow to Maintain 2ft./sec. *Scouring Velocity in Various PipesVolume inGallons per Foot1.42.64.075.87Pipe Size11 411 2234Minimum GPM913214680Pipe Size681012Minimum GPM180325500700* Failure to maintain or exceed this velocity will result in cloggedpipes. Based on schedule 40 nominal pipe.PAGE 5

Goulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProWastewaterSewage Pump SelectionVENTSEWER LINE TO UPSTAIRS FIXTURESVENTHOUSE SEWER LINE TO STREETSHOWERTOILETWASHER2" PLASTIC PIPEAND FITTINGS12'DRAINPIPERESIDENTIAL SUBMERSIBLEEJECTOR SYSTEMThe primary function for which the Submersible Sewage Pump is designed is the handling of sewage andother fluids containing unscreened nonabrasive solidsand wastes. In order to insure a maximum of efficiencyand dependable performance, careful selection ofpump size is necessary. Required pump capacity willdepend upon the number and type of fixtures discharging into the sump basin, plus the type of facility served. The fundamentals involved in selecting apump for a Water System can be applied to selecting a Submersible Sewage Pump. By answering thethree (3) questions concerning capacity, suction, anddischarge conditions we will know what is required ofthe pump and be able to select the right pump fromthe catalog.1. To simplify the selection of the proper size Submersible Sewage Pump, the general rule is to basethe pump capacity on the number of toilets thepump will be serving. This differs from the selection of the proper pump for a Water System in thatquestion 1, “Water Needed” is reversed. How muchliquid do we want to dispose of rather than howmuch do we need? The following chart will helpdetermine pump capacity:Sewage Selection Tablefor Residential or Commercial SystemsNumber of Bathrooms12GPM2030The above selection table takes into considerationother fixtures which will drain only water into the sewage basin.PAGE 6Therefore, pump capacity should not be increased forlavatories, bathtubs, showers, dishwashers, or washingmachines. When no toilets are involved in the facilityserved, for example, a laundromat, the major fixturedischarging waste should be considered. In this case,the chart should read “Maximum Number of WashingMachines.”In areas where drain tile from surrounding lawns orfields enters the sump, groundwater seepage can bedetermined as follows:14 GPM for 1,000 sq. ft. of sandy soil8 GPM for 1,000 sq. ft. of clay soilIf the calculated groundwater seepage is less thanone-fourth of the pump capacity required based onthe number of toilets, the pump capacity should notbe increased. Any seepage over the allowed onefourth should be added to the required pump capacity.2. Since the pump is submerged in the liquid to bepumped, there is no suction lift. Question 2 doesNOT become a factor in pump selection.3. Answering Question 3, discharge conditions isthe final step in selecting a Submersible SewagePump. Only the vertical distance between the pumpand the highest point in the discharge piping, plusfriction losses in discharge pipe and fittings affectdischarge pressure. (Friction losses can be obtainedfrom the friction table in this Selection Manual.)Normally service pressure is not a consideration.The total of the vertical distance, plus the frictionlosses is the required discharge head in feet.

Goulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProWastewaterWastewater Pumps Sizing and SelectionWHAT DO YOU NEED TO KNOW TO SELECT A SEWAGE PUMP?1. Size solids to be handled. Effluent (liquid only) – 1" Residential – 1½" or larger Commercial/Industrial – 2½" orlarger2. Capacity required. 1 bath – 20 GPM 2-3 baths – 30 GPM 4-5 baths – 45 GPM3. Pump/Motor Run TimeUnits up to 1½ HP should run aminimum of 1 minute. Two (2)HP and larger units should run aminimum of 2 minutes.4. Formula for Total Dynamic Head:7. Are receiver basin and coverVertical elevationrequired? friction loss (pipe fittings)8. What is the power available? Pressure Requirements (x 2.31') Phase – 1Ø or 3ØTotal head in feet Voltage – 115, 200, 230, 460or 575 VNote: Wastewater pumps are Hertz– 50 or 60 Hzdesigned to pump effluent withsome suspended solids, not sol9. What pipe size will be used?ids with some effluent.10. Simplex or Duplex System?5. Must maintain minimum velocity of(Duplex when service cannot2 ft./second (see index).be interrupted)6. Must turn storage in the dischargeNote: State and local codes takepipe a minimum of one time perpreference.cycle. (See index).ACCESSCOVERVENTTO ELECTRICALCONTROLS AGE 7

Goulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProWastewaterFlow Rate CalculationResidential SizingCommercial SizingOCCUPANT SIZINGFIXTURE COUNT V Value style fixture T Tank Style FixtureFixtureTypeToiletToiletLav SinkTubShowerFull Body ShowerKitchen SinkDishwasherWash MachineBidetIcemakerHose BibCountQuantityCountTotal Count34981532438456Toilets3Tub and Shower2Full body showerLav SinkKitchen Sink1Dishwasher1Icemaker1Wash Machine1Hose Bib1Total124384PLUMBING WATER xtureToiletLav SinkShowerFull body showerDishwasherIcemakerWash MachineDishwasherHose 002401 – For system predominantly for flush valves2 – For system predominantly for flush tanks20204060801001201401601802002202001802 – Flush Tank Curve1 – For system predominantly for flush valves2 – For system predominantly for flush tanks11000“Hunter” Estimate Curves for Demand Load1 – Flush Valve Curve3002240Fixture Units1000Total Count500150200750200150604012206250060900Gallons per MinutePLUMBING WATER tal UrinalV or T10Stall UrinalV or T5Lav SinkV or T3Kitchen SinkV or T4TubV or T4ShowerV or T4DishwasherV or T4IcemakerV or T3Commercial Wash. MachineV or T6Hose Bib - CommercialV or T6Full Body ShowerAdd Flow rate 9 to 65 Gallons per minute to totalDemand GPMDemand GPMesyeploEmry/Fixture80PAGE 8OFIXTURE COUNT1000leop/Peceffi(B)50V6T3V or T1V or T2V or T2Add Flow rate: 9 to 65 Gallons per minute to totalV or T2V or T4V or T8V or T3V or T3V or T4Fixtureen203040506070ol/Stud123456Sewage Selection Chart for Larger Capacity 10hoFlow Rate per MinuteScNumber of BathroomsNumber of Homes, Trailers, People, etc.BATHROOM COUNT500800 10001500200025003500Fixture Units“Hunter” Estimate Curves for Demand Load

WastewaterGoulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProFlow Calculation ExampleTo Calculate Flow with Fixture CountsCount CalculationTake total number of each style fixture X Count forthat fixture. Add all fixture total counts. Add Full Bodyshower flow rate to total.25 Toilets25 Lav Sinks25 Tubs6 Kitchen Sinks2 Commercial1 DishwasherUse “Hunter” estimate curves for Demand Load forappropriate style fixtures. (Valve style fixtures are predominant in Commercial buildings; Tank style fixturesare predominant in Residential).COMMERCIAL BUILDING EXAMPLE:Total 2507510024124465 CountPlumbing Water Systems500Valve Style Fixtures400Demand GPM25 Toilets25 Lav sinks25 Tubs6 Kitchen Sinks2 Commercial Washing Machines1 DishwasherX 10 CountX 3 CountX 4 CountX 4 CountX 6 CountX 4 Count300200120100011 – For system predominantly for flush valves2 – For system predominantly for flush tanks2465 50010001500200025003500Fixture Units“Hunter” Estimate Curves for Demand LoadHead CalculationExample: Fig. 1. A two-bathroom home is situated such thatthe city sewer main is located above the basement drainfacilities. Groundwater seepage through drain tile into thesump is estimated at 6 GPM. The vertical distance from thepump to the highest point in the discharge piping is 12 feet.A pump capable of pumping 30 GPM is required (seepageis less than one-fourth of the pump capacity so it is automatically included). The discharge head must be 12 feet, plusany friction loss in the approximately 15 feet of pipe, 3-90ºelbows, 3-45º elbows, and check valve.Assume plastic pipe is used.1. RATE OF FLOW 30 GPMTwo (2) toilets, includes seepage up to one-fourth ofselected pump capacity. 6 GPM is less than the7.5 GPM allowable so no correction is necessary.2. SUCTION CONDITIONS – Flooded Suction3. DISCHARGE CONDITIONSVertical Differential 12.0'Friction losses @ 30 GPM15' of 2" pipe (1.8' per 100' of pipe) .2' F.L.3-2", 90º elbows 16.5 equivalent feet3-2", 45º elbows 7.5 equivalent feet1-check valve 19.0 equivalent feetTotal 43.0 equivalent feet .6' F.L.Total Discharge Head 12.8'Referring to the catalog, we find that a 1/3 HP Sewage Pumpshould be adequate for the job.Example: The same conditions as in the previous example exist, except the house is located on a large tract of sandy soilwhere the groundwater seepage is estimated @ 20 GPM.1. RATE OF FLOW 30 GPMTwo (2) toilets, includes seepage up to one-fourth ofselected pump capacity – 7.5 GPM.The additional 12.5 GPM (20-7.5) must be added tothe required pump capacity – 12.5 GPMTotal 42.5 GPM2. SUCTION CONDITIONS Flooded Suction3. DISCHARGE CONDITIONSVertical Differential – 12.0'Friction losses @ 42.5 GPM15' of 2" pipe (3.5' per 100' of pipe) .5' F.L.3-2", 90º elbows 16.5 equivalent feet3-2", 45º elbows 7.5 equivalent feet1-check valve 19.0 equivalent feetTotal 43.0 equivalent feet or 1.5' F.L.Total Discharge Head 14.0'Referring again to the catalog, we find that a 1/3 HPSewage Pump should be adequate for this installation.PAGE 9

Goulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProWastewaterBasin SizingCALCULATING BASIN SIZECHART A1. Choosing DiameterDimensionsVolumesTotalGallonsGallonsPer InchA minimum of 24" is required for simplex. Duplex stations normally start at 36", but require much larger forlarger diameter discharge pumps.DiameterDepth36651.81For example: A pump that flows 100 GPM, requires a2-minute run time. A duplex station with a diameter of36" holds 4.4 gallons (see Chart A) per inch.48841.75601021.70721181.6450 GPM x 2 minutes 100 gallons24100 gallons / 4.4 gallons per inch 22.72" for pumpdown.841651.96961881.9622.72" would be used for 27284148117.6396169217.632. Sizing DepthInlet and Float Location Basin Sizing Method1. Top of basin to bottom of the inlet (A) in.2. Inlet to "Alarm" float (B) in.3. "Alarm" to "Lag" float (C) in.4. "Lag" to "On" float (D) in.5. Pump down (E) 17.86 in.(Note A)6. Floor of basin to top of pump case(Note B) 19.0 in.Note A Minimum suggested basin diameter for duplex configurationis 36". Volume by inch of basin divided by 2 x's pumping rate.Note B Most pumps are approximately 19" tall. Pump should remaincovered during pumping.Finished FloorABCDBasinE19”PAGE 103036

WastewaterGoulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProElectrical DataAGENCY LISTINGS AND POWER CORD PLUG REMOVALTRANSFORMER SIZESOur single-phase sump, effluent and sewage pumpswith 115, 208 and 230 volt motors up to and including1 HP are now built with NEMA three-prong groundingplug power cords. This allows qualified electriciansor professional pump installers to easily connect thepumps; according to U.S. National (NEC), Canadian(CSA), state, provincial and local electrical codes, toa properly rated piggyback float switch for automaticoperation.A full three phase supply is recommended for all threephase motors, consisting of three individual transformers or one three phase transformer. “Open” deltaor wye connections using only two transformers canbe used, but are more likely to cause problems fromcurrent unbalance.Transformer ratings should be no smaller than listed inthe table for supply power to the motor alone.NOTICE: This statement is written for the intent purposeof verifying to electrical inspectors that according toboth UL and CSA standards it is allowable to removethe plug ends for direct wiring to a disconnect switch,control panel or hard wired float switch. Removingthe plug end does not violate our UL Listing or CSA/CUS certification in any way. Always follow the aforementioned codes when making connections to thebare leads once the plug is removed. Plug removalinformation and wiring diagrams may be found in theInstallation Manual supplied with the pump and inthis booklet. Please use this statement in the event aninspector needs written assurance of this policy.TRANSFORMER CAPACITY REQUIRED FOR SUBMERSIBLEMOTORSSubmersibleTotal Effective3Ø MotorKVAHP RatingRequired11 232435571 271 est KVA Rating –Each TransformerOpen WYEWYE orDELTA 2DELTA 3TransformersTransformers21211 2325371 251051571 215102010251530203520402550306540PAGE 11

WastewaterGoulds Water Technology, Bell & Gossett,Red Jacket Water Products, CentriProApplication – Three Phase UnbalanceTHREE PHASE POWER UNBALANCEA full three phase supply is recommended for allthree phase motors, consisting of three individualtransformers or one three phase transfor