#: locale=en ## Action ### URL PopupWebFrameBehaviour_BCB90866_8909_D95F_41DC_ADBB55A138E7.url = https://av8rdas.wordpress.com/ PopupWebFrameBehaviour_B9855BDE_897A_DF6F_41BA_C0D92D474C31.url = https://av8rdas.wordpress.com/2023/12/23/developing-a-system-diagram-in-the-field/ PopupWebFrameBehaviour_6D056504_7FAB_850B_41DE_0A0F325D71DB.url = https://www.fpevalves.com/thermostatic-control-valves/model-4010/ ## E-Learning ### Answer questionOption_9FA7CC83_890B_D9D4_41BF_A4BD6088B236.text = For a centrifugal pump, water will flow from the center of the impeller to the perimeter of the impeller. Thus, the part of the casing connected to the center of the cylinder enclosing the impeller (called the volute) is the inlet connection. The part of the casing connected to the perimeter of the volute is the outlet connection. questionOption_9A7343CB_893B_CF54_41E0_8862C7C14672.text = For a centrifugal pump, water will flow from the perimeter of the impeller to the center of the impeller. Thus, the part of the casing connected to the perimeter of the cylinder enclosing the impeller (called the volute) is the inlet connection. The part of the casing connected to the center of the volute is the outlet connection. questionOption_9B4356D5_8909_497C_41CB_C70CDE66C004.text = From left to right. questionOption_9B044649_8909_C955_41C5_92A79A46F01F.text = From right to left. questionOption_6FE9A3A1_7F57_9D0D_4199_A77B8D93F019.text = It is a coupon holder and it should always have flow through it. questionOption_75C3602A_60E8_CF61_41A6_99BC6EED62A3.text = It is a pressure regulator. questionOption_76DE30DC_60E9_CF22_4199_BA4BBD73C9C0.text = It is a pump of some sort. questionOption_77984E5E_60E8_D3DE_41B2_89DA5F47F048.text = It is a self contained mixing valve. questionOption_6E998DB7_7F5A_8575_41D8_F284D919B4B8.text = It is a shot feeder (a.k.a. pot feeder) and if there is not continuous flow through it, then it will not do its job. questionOption_6E9F00DC_7F7A_9B3B_41DC_19A10B23D943.text = It is a shot feeder (a.k.a. pot feeder) and only needs flow through it when chemicals are being added to the system. questionOption_6D069ACC_7F6B_8F14_41D4_047343D97B6F.text = It is a side stream filter and should always have flow through it. questionOption_75990B9B_60EB_B127_41D5_CF0C92B85C4E.text = It is a strainer tee; similar to a suction diffusser but for use with a boiler. questionOption_765AB807_60E8_5F2F_41AE_0994E56C03BF.text = It is a wireless control valve. questionOption_7A15F5D5_60D8_5123_41B5_B5781105A4EE.text = It is an air source heat pump. questionOption_7955AE67_6028_B3EF_41D5_C637DC8C12B0.text = It's a gas fired boiler. questionOption_7CEA95D8_60D8_5122_41CB_9B520D029426.text = It's an electric boiler. questionOption_7BE1C83F_60D9_BF5F_41D5_074E5BD1C6C1.text = It's one of those mid-sized silver things you see in the ASHRAE Journal. questionOption_91A83D83_84A6_B207_41D3_258C41F6A532.text = The flow arrows on the pipe are correct because for a centrifugal pump, the water flows from the eye or center of the impeller towards the perimeter. If you look closely at the pictures, the pump connection closest to the blue thing connect to the perimeter of the casing, making that connection the outlet. The pump connection on the opposite side appears to direct water to the center of the impeller making it the inlet connection. Thus, flow would be from this side towards the side of the pump connected to the blue thing, which matches the direction that the arrows point on the piping near the pump. questionOption_9375107B_84E2_B207_41DB_3E544D58469A.text = The flow arrows on the pipe are wrong because for a centrifugal pump, the water flows from the perimeter of the impeller towards the center. If you look closely at the pictures, the pump connection closest to the blue thing appears to direct flow to the perimeter. The pump connection on the opposite side appears to pick up water from the center of the impeller. Thus, flow would be from the side of the pump connected to the blue thing towards the opposite side, which is backwards from the direction that the arrows point on the piping near the pump. questionOption_92B387F8_84AD_BE01_41C6_8B8293D9AD1B.text = You can't tell from these pictures. Pumps are like paddle wheels and the impeller needs to be able to "scoop" water from the inlet and push it to the outlet. So you would need to be able to see the arrow cast into the casing that shows the direction of rotation of the impeller and none of the pictures have good enough resolution to show us this. questionOption_6DBD19B4_7FAA_8D0A_41D8_4AFEA50AEF37.text = You could ask the operators. questionOption_6EF03164_7FAA_9D0B_41CF_9BA00B1971FB.text = You could check several labels to see if they were consistent. questionOption_6F654E6C_7FAD_871B_41D5_AED315EC0638.text = You could look at the details of the pump construction. questionOption_6EC7FEF5_7FAA_84F5_41B2_2981E9C57BB3.text = You could look for a check valve. questionOption_9F790E79_890B_5935_41DC_08CB316E9BB6.text = You should look for an arrow cast into the casing showing the direction of rotation of the impeller. Since the impeller is like a paddle wheel and pushes water through the pump, the arrow will show the direction that the water is being pushed and from that you can figure out which connection is the inlet and which is the outlet because the outlet will be the connection towards which the water is being pushed. ### Question question_74286117_60F8_D12F_41CB_69E954FF59E4.title = Can you figure out what this is from the information you can gleen by looking at the photo album? question_86C720DC_890A_C96C_417A_8F37EBA2C2DE.title = How can you determine the direction of flow through this pump? question_98BCE091_8909_49F4_41B6_32EB77048CD2.title = What direction is the water moving through the pump? question_6F510507_7F56_8516_41C7_B062243AEC81.title = What is this device and should it always have flow through it? question_7AE0041D_60D8_D722_41D4_C4565B2D54BB.title = What is this thing? question_91DDCEE7_84BD_8E0F_41DE_1647AFC2381A.title = What physical clue regarding the physical shape of the pump indicates the direction that water is flowing through them? question_6F8D29DA_7F57_8D3F_41C0_FD886B34E7A4.title = What physical clue(s) could you use to absolutely validate/verify that the direction of flow shown by this label was correct? ### Question Screen quizQuestion_753B6F6A_60F8_51E1_41BA_7BE7282EE15A.ok = OK ### Report Screen quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.title = - SCORE - quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.completion = Completed quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.questionsCorrect = Correct quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.downloadCSV = Download .csv quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.questionsIncorrect = Incorrect quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.items = Items Found quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.questions = Questions quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.repeat = Repeat quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.submitToLMS = Submit quizScore_75397F6A_60F8_51E1_41D0_91303690EDDB.elapsedTime = Time ### Score Name score1.label = Score ### Timeout Screen quizTimeout_753C3F6A_60F8_51E1_4181_B2663DD01C72.title = - TIMEOUT - quizTimeout_753C3F6A_60F8_51E1_4181_B2663DD01C72.repeat = Repeat quizTimeout_753C3F6A_60F8_51E1_4181_B2663DD01C72.score = View Score ## Hotspot ### Text FlatHotspotPanoramaOverlayTextImage_AF68FA31_890A_D934_41A5_B10782D39239.text = A FlatHotspotPanoramaOverlayTextImage_A0562B53_8907_BF74_41D8_0A0D281AC7C4.text = A FlatHotspotPanoramaOverlayTextImage_A29D4C15_8939_58FC_41DD_B617497A3BA6.text = A FlatHotspotPanoramaOverlayTextImage_A190DBF7_893F_DF3D_41DF_81B63CA94759.text = B FlatHotspotPanoramaOverlayTextImage_BDF7C305_8906_C8DD_41E0_D5EB8BE3E55B.text = B FlatHotspotPanoramaOverlayTextImage_A1F45EE5_890B_595C_41B5_BB813A2E6C28.text = C FlatHotspotPanoramaOverlayTextImage_A298C380_893E_CFD3_41D6_3B2DEE052630.text = C FlatHotspotPanoramaOverlayTextImage_A2103386_8B0B_4FDC_41CF_8E415B289E26.text = C FlatHotspotPanoramaOverlayTextImage_9822C864_8909_595C_41CF_41634886FF1D.text = Cick Here to Answer a Question and Score a Point. 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panorama_908C3339_83A2_B603_41DC_97FF9B875633.label = Pumps Suction Cropped album_73ED2B8B_6028_7126_41D1_B9E7DDB96534_0.label = Shot Feeder Cropped map_713FD63B_6068_5367_41C5_44F6C4D8E59C.label = Site Overview map_A9CDCB8E_890B_DFEF_41D2_674571090336.label = System Diagram with Reference Points ## Popup ### Body htmlText_676B9ECC_740D_B3F3_41C2_76DB0C844347.html =
Also a good guess, but not true.
htmlText_70BEB881_7F5A_8B0D_41D5_995D7018BEC8.html =
Close, but not quite.
htmlText_A9F6AA5E_8909_B96C_41DB_26B8F8A23587.html =
Congratulations!
You just scored a point for being curious and discovering the boiler nameplate. This will help you answer some of the other questions and also provides useful data for understanding the system and performing energy calculations.
htmlText_9F0C9F32_890E_B734_41D1_DA5A9E0683A3.html =
Correct!
Congratulations!
Centrifugal pumps move water by flinging it from the center of the impeller to the perimeter, just like a merry-go-round at the playground flings the kids.
This means that the pump suction connection needs to deliver water to the center of the impeller and the discharge needs to pick up water from the perimeter of the impeller.
If you assume that the large flat cylinder portion of the pump casing is where the impeller is, then the discharge should connect to the perimeter of the cylinder and the suction should connect to the center of the cylinder.
htmlText_9C5F9B2F_84E6_961F_41B0_84810E5D16C2.html =
For most centrifugal pumps, a close inspection of the pump casing will reveal the direction of flow. This will be an absolute indicator because of the physics of pump operation.
More specifically, centrifugal pumps move water by flinging it from the center of the impeller to the perimeter, just like a merry-go-round at the playground flings the kids.
This means that the pump suction connection needs to deliver water to the center of the impeller and the discharge needs to pick up water from the perimeter of the impeller.
If you assume that the large flat cylinder portion of the pump casing is where the impeller is, then the discharge shoudl connect to the perimter of the cylinder and the suction should connect to the center of the cylinder.
If you study the pumps closely (there are hot spots that will open some images) you can see that the pipe with the label we are discussing connects to the perimeter of the casing where-as the pipe from the boiler connects to a portion of the casing that drops down and directs the water towards the center of the impeller.
htmlText_9B89D4C0_8907_4954_41B9_61CCA4579A55.html =
For most centrifugal pumps, a close inspection of the pump casing will reveal the direction of flow. This will be an absolute indicator because of the physics of pump operation.
More specifically, centrifugal pumps move water by flinging it from the center of the impeller to the perimeter, just like a merry-go-round at the playground flings the kids.
This means that the pump suction connection needs to deliver water to the center of the impeller and the discharge needs to pick up water from the perimeter of the impeller.
If you assume that the large flat cylinder portion of the pump casing is where the impeller is, then the discharge should connect to the perimeter of the cylinder and the suction should connect to the center of the cylinder.
If you study the pumpclosely, you can see that the blue casing on the left will direct water towards the bottom of the pump, which is where the eye of the impeller will be. Thus, this is the inlet side of the pump.
The blue casing on the right comes off of the perimeter of the cylinder that is inclosing the impeller (called the volute). Thus, it will collect the water being flung off the impeller at the perimeter and is the discharge of the pump.
htmlText_6DD6AA0E_7FAE_8F17_41C0_52AD96964C36.html =
Good guess, but not correct unfortunately.
htmlText_6D971C90_7FAA_8B0A_41C2_9E2503226A40.html =
Good guess, but not correct unfortunately.
htmlText_6DC0CA24_7FAF_8F0A_418E_A9D8B9ADC527.html =
Good guess, but not correct unfortunately.
htmlText_6CC67E3A_7FAA_877E_41D4_7C78F0471C0C.html =
Good guess, but not correct unfortunately.
htmlText_9D81A031_8909_4934_41C2_7FF9972A8B82.html =
Intuitively, this seems correct. But bear in mind that this is called a centrifugal pump. The name suggests the mechanism that causes the fluid to move through the pump. That, in turn implies a direction of flow.
htmlText_938568B8_84E6_B201_41D0_A1A557447C5C.html =
Intuitively, this seems correct. But bear in mind that this is called a centrifugal pump. The name suggests the mechanism that causes the fluid to move through the pump. That, in turn implies a direction of flow.
htmlText_9DD57504_8909_48DC_4183_1ED34F1F6AAA.html =
Reconsider the direction of flow based on centrifugal force. If you were standing on roller skates half way between the perimeter and center of a merry-go-round in a play ground (do not actually do this) and somebody spun it, in which direction would you tend to move?
htmlText_9CF60F51_84E2_8E03_41C7_DF089A9C95BF.html =
Reconsider the direction of flow based on centrifugal force. If you were standing on roller skates half way between the perimeter and center of a merry-go-round in a play ground (do not actually do this) and somebody spun it, in which direction would you tend to move?
htmlText_68D8A0BC_7405_8F8C_41D2_017AEE297FF9.html =
That is not an awful guess, but its wrong.
htmlText_6795B4AC_7402_978C_41DC_EC09CDB571F7.html =
That's right! Congratulations.
The clues are:
1. The flue that you see coming out of it on the side towards the pumps.
2. The gas line connected to it; you can see the gas meter in the lower left corner of this view.
3. The nameplate, which you can see from the other side of the boiler (there is a hot spot associated with it).
htmlText_6D90CE08_7F6D_871A_41D3_01CC54C56918.html =
This is not a bad guess, but unfortunately it is in correct. We regret any inconvenience this has caused you.
htmlText_6EB973DA_7FAA_BD3F_41B0_A994A240DDB7.html =
This is not a bad idea, but check valves have been installed backwards. Most of the time (but not always), a backwards check valve will cause a number of other issues, so this is reasonably "sure fire", but it is not as absolute as one of the other options.
htmlText_6EDA281C_7FB6_8B3A_41AD_9335837F9B17.html =
This is not a bad idea, but it is possible that the [person that put the labels on was consistently wrong. There is a physical clue available that will absolutely verify the direction of flow.
htmlText_6EB33839_7FAF_8B7A_41DE_406975AAFE3E.html =
This is not a bad idea, but it is possible that they do not realize the label is wrong. There is a physical clue available that will absolutely verify the direction of flow.
htmlText_6EC0A1E5_7F6A_7D0A_41DA_8E2E82E48248.html =
While it's true that this is a shot feeder/pot feeder, the only time it has to have flow through it is immediately after you use it to add chemicals or glycol to the system. Once the content of the feeder has been disipated into the system, it can be valved out to save pump energy.
One one site, the measured annual savings associated with this was $480 per year. This is because these devices are typically piped across a pump and thus, have a lot of pump head across them. This can drive quite a bit of flow through them even though the line size is not particularly large.
Some folks are concerned about the stagnant water that would be in the device if it was valved out. One option if this was a concern would be to valve it out and drain it.
Another option would be to throttle the flow so that a small quantity of water circulated throught it when it was not being used to add chemicals to the system.
htmlText_6827AB93_7402_B195_41A9_AE05B232A235.html =
While probably true, we were hoping for something a bit more specific.
htmlText_6D5BE855_7F7F_8B0A_41D8_329BB3F7E50D.html =
You are correct; Congratulations!
The only time it has to have flow through it is immediately after you use it to add chemicals or glycol to the system. Once the content of the feeder has been disipated into the system, it can be valved out to save pump energy.
One one site, the measured annual savings associated with this was $480 per year. This is because these devices are typically piped across a pump and thus, have a lot of pump head across them. This can drive quite a bit of flow through them even though the line size is not particularly large.
Some folks are concerned about the stagnant water that would be in the device if it was valved out. One option if this was a concern would be to valve it out and drain it.
Another option would be to throttle the flow so that a small quantity of water circulated through it when it was not being used to add chemicals to the system.
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