Whole house pumping and secondary circulation .
- Thread starter Bigburn
- Start date
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Bigburn said:
Oversizing means increasing the cold feed to the cylinder.
Heat loss will be no different to the secondary circuit you were thinking about in the first place, the only difference being the position of the pump.
Distributing hot water in a domestic premises using WHP method is easier when locating the pump beside the cylinder which should be strategically located anyway.
The secondary circulation loop may go West providing HW to one section of the building while all the other HW services go East.
So if the pump is sited West at the end of a long secondary circulation loop then delivering the hot water back East from the WHP reintroduces cold water to the taps and wasted water due to the long pipe run.
Back to square one .
The secondary circulation loop may go West providing HW to one section of the building while all the other HW services go East.
So if the pump is sited West at the end of a long secondary circulation loop then delivering the hot water back East from the WHP reintroduces cold water to the taps and wasted water due to the long pipe run.
Back to square one .
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Looking at ChrisR's first drawing again I think this would work but have the secondary return higher up the cylinder.
The two pumps operating at the same time would be my only concern though this could be addressed with a simple relay setup.
The two pumps operating at the same time would be my only concern though this could be addressed with a simple relay setup.
Bigburn said:AAh,but of course, it does not matter if both pumps run together as an outlet will be open.
You can fit 10 pumps if you like it will not circulate, you cannot reverse the flow through a Salamander pump.
Bigburn said:
Then its back to my theory which you dont understand Doitall .
Wish I could post a diagram like ChrisR.
You can always email me a drawing, its in my profile, just go back to the main index and click on doitall
Water will go back through a regenerative or centrifugal pump if there's no check valve in it. The OP said "or similar", and they don't all have check valves.
In the second drg the 2ndry circ pump would be pumping into a shut valve for the time the whp is on, but a bath will be full in a couple of minutes; too short a time to do any damage.
DIA thinks it would pump into the loft tank for much the same reason he got it all wrong about pumping-over in a heating system. At his age, too!
You would restrict the flow to what you need, through the circ loop, but the higher flow with the whp on, would stir the hw cyl. You could of course put your essex flanges where you like, including at the same height.
To post a drawing, first do it in Word. The facilities aren't bad at all once you get used to them. Then Save for Web - or Save As and pick html. Put it in a directory called "sketches", say. You'll find subdirectories for each "save", with more than one file. If you "grouped" everything in the sketch you just get one, gif. Then post the pic on photobucket or pictiger.com. Copy the link, paste it here, highlight it and click on "Img". Takes half a minute.
In the second drg the 2ndry circ pump would be pumping into a shut valve for the time the whp is on, but a bath will be full in a couple of minutes; too short a time to do any damage.
DIA thinks it would pump into the loft tank for much the same reason he got it all wrong about pumping-over in a heating system. At his age, too!
You would restrict the flow to what you need, through the circ loop, but the higher flow with the whp on, would stir the hw cyl. You could of course put your essex flanges where you like, including at the same height.
To post a drawing, first do it in Word. The facilities aren't bad at all once you get used to them. Then Save for Web - or Save As and pick html. Put it in a directory called "sketches", say. You'll find subdirectories for each "save", with more than one file. If you "grouped" everything in the sketch you just get one, gif. Then post the pic on photobucket or pictiger.com. Copy the link, paste it here, highlight it and click on "Img". Takes half a minute.
ChrisR said:
name one that you can reverse the flow
ChrisR said:
And if the check valve goes tits up as they do
ChrisR said:
Thats is your opinion, strange the manufacturers agreed with me that it was wrong
ChrisR said:
Why/how will the WHP stir the cylinder, all it can do is take water from it.
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