Hello
my problem i have a grundfos CR 2 / 70 pump with presscontrol Optima,
the height of my installation and around 14m of diameter 22mm Copper and about one 30m on 3 stages in 16mm Copper
Pressure drop at the opening of the taps, I have no leak,
Grundfos CR 2 / 70 pump with presscontrol
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Re: Grundfos CR 2 / 70 pump with presscontrol
Pressure or flow drop?
Can you test the pump without water level?
How is the suction done?
Can you test the pump without water level?
How is the suction done?
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Re: Grundfos CR 2 / 70 pump with presscontrol
Thank you for your prompt response
I did the test at the height of the pump at around 3m, the arrival of the water at the tap is done 15 seconds after we run out,
for suction the pump is at 2 meter above with a strainer and a non-return valve at the pump,
I did the test at the height of the pump at around 3m, the arrival of the water at the tap is done 15 seconds after we run out,
for suction the pump is at 2 meter above with a strainer and a non-return valve at the pump,
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Re: Grundfos CR 2 / 70 pump with presscontrol
at the opening of the tap drop in flow for a few seconds, and a strong pressure which comes
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Re: Grundfos CR 2 / 70 pump with presscontrol
313 wrote:at the opening of the tap drop in flow for a few seconds, and a strong pressure which comes
I don't really understand this ... ???
In 8 case on 10, a pumping flow problem is a badly primed pump, therefore problems with the suction: air intake, blocked strainer, HS valve ...
The 2 other cases it is the pump which is HS internally: molten turbine for example ...
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Re: Grundfos CR 2 / 70 pump with presscontrol
may be air upstream,
because I don't use the upper floor?
or the Optima presscontrol which does not fulfill its function and starts late,
because with my old installation there is a balloon of 50litres and a contactor,
it worked correctly, the only problem is the contactor that makes too much noise from the hellish clack,
especially at night very annoying,
because I don't use the upper floor?
or the Optima presscontrol which does not fulfill its function and starts late,
because with my old installation there is a balloon of 50litres and a contactor,
it worked correctly, the only problem is the contactor that makes too much noise from the hellish clack,
especially at night very annoying,
0 x
Re: Grundfos CR 2 / 70 pump with presscontrol
maybe there are people who had the same problem as me ????
0 x
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