I looked at the link soooo if I post a picture showing the pump facing away from the cylinder will your head explode ?
Pump should be on the return, facing up, complete with a check valve and draincock.
Secondary Hot Water Returns
- Thread starter Alex10
- Start date
Pump should be on the return, facing up, complete with a check valve and draincock.
Normal way is as Doitall and others have stated which I tend to agree with.
Can you post a schematic for this?
Vent pipe normally.
I have fitted a pump on a secondary return at a large private school. I connected a by-pass pipe and installed the pump in that leaving the cylinder open vent un-restricted.
Why ? because the consultant engineer wanted it like that and did the drawings.
Later they hire me for a day to explain how a one pipe ladder system would/was have been installed after they make a giant fook up. 4 x 2" flows and 1 x 4" return, he assumed the flow would be the larger pipe
If its pushing water around a circuit and then back to the cylinder via a surrey flange how can it affect the open vent ? the distance between the pull of the pump and return water coming out of the surrey flange will be about 6 inches, please explain how thats going to pump up the open vent.
That wouldn't work. Why? Because the bottom tail bit of surrey flange is too close to top of hot outlet and may be cool as it is running around with no draw off.
If piped correctly, pump should be on return pipe toward an Essex flange about 2/3 from bottom. That way, there should not be any air getting pull in.
It is not a pump, it is a circulator and design to move water not pressuring it up.
Daniel.
I also agree with the pump on the return with an NRV.
Even better with a pipestat to turn it off when the pipe is warm.
Or alternatively a timeclock to give five min every 15 min during the useage hours.
Saves energy.
Tony
Even better with a pipestat to turn it off when the pipe is warm.
Or alternatively a timeclock to give five min every 15 min during the useage hours.
Saves energy.
Tony
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