Is that the boosted cold
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Does it feed a tank onntop of the four storys?
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Its trying to maintain a constant pressure.
When you close it do you only lose pressure on one side
Yes it is boosted cold
No it does not feed a tank on the top floor it has a pressure tank next to it.
Its connected in parallel so both lose pressure. Yes I think its trying to maintain a constant pressure
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What is this pressure transmitter, can you post photos of it please?
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Looks like it is in a workshop at the moment.
The transmitter has a wire that runs to the control board. That is why I was thinking that maybe " the control board sends command to the motor based on the transmitter reading" That is why I was thinking the motor is variable speed. I dont see an auto bypass valve either.
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there is only one pressure gauge on the discharge side of both pumps that sits next to the pressure transmitter.
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The pressure transmitter is connected to the pressure gauge with a tee and has wire that goes to the control board
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I think the reason it runs continuously is because its trying to maintain a constant pressure that does not go up to the set cut out pressure.
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I am sorry I think I had said something wrong. Please refer to the layout drawing I made as I try to explain. Actually the discharge valve1 is currently 20% or so open so like 80% close. Whenever I try to open it pressure drops. When I close main discharge valve pressure also drops. So yes I think its trying to maintain a constant pressure. But if it does, why does the pressure dont recover. I have watch there for like 2 min and the pressure never recover. How long does a pressure of such a system recovers? Whenever I close main valve or open valve1 pressure drops within a minute.