Discuss Coldwater Accumulators - 1 not filling in the USA area at PlumbersForums.net
Thank you and apologies for not knowing I could check the pressure whilst filling.You certainly can as the pressure will start to rise immediately water starts to enter the accumulator, it will start at your precharge pressure and then rise eventually to its final pressure...exactly the same as the water side pressure.
I wouldn't drain down again, you have pre pressurised to 1 bar which is perfectly acceptable and they are both filling so see what the final pressures are.
I am just wondering if that charging pump is variable speed controlled and some problem with this, have you any info on it?.
Only one vessel is filling exactly as before.
An update, charger still running, one vessel filling, the other isn't. Pressure on both vessels 2.1 bar.
Another question from me, if the pressure increasing on both vessels but water only going into 1, could I be looking at something as simple as a failure of the inlet valve? Even when open is actually closed?
Highly technically (!), by tapping the side of the vessels, empty is hollow sounding, full does not sound hollow. An empty vessel also can be very gently rocked (we never do this!) a full one is much heavier and cannot be rocked if tried.If the vessels start out at the same pressure empty, then during the fill cycle they both increase pressure by the same amount, that would suggest they are both filling equally.
When you say 1 vessel is not filling, how are you determining that?
I have put a link to the charger on a previous post, I have the documentation here for it too, I am looking for the output but not finding anything currently. There are a number of settings for the charger which I can detail here and what they are set to?The charger kicking in depends on its cut in pressure so if its set slightly lower than the (dynamic) mains pressure then will only cut in when both accumulators are empty. To fill both accumulators from 1.0 bar (empty) to 2.8 bar requires 426 litres of water so if the pump output is 25 LPM then 17 minutes to re charge, Still doesn't explain though why the pump was running continuously, the only logical explanation is that the demand was > 25 LPM or whatever the pump is rated at.
Have you any idea of the pump output or a link to it, for interest.
The low and high pressure settings are the failsafe settings.A set point of 3 bar with a diff. press of 0.5 bar would indicate to me that it cuts in at 2.5 bar and cuts out at 3 bar. I don't know what the low and high pressure settings refer to.
The pump data as you said gives no flow rate but the power consumption of 398 watts should by my calc give 20/25 LPM.
I think you have a problem with the new charger, could be something as simple as a bit of dirt under a non return vave, I don't think there was/is anything wrong on the accumulator side, I would get back on to your plumber & stuart turner. In the mean time you might consider reducing the setpoint to say 2.1/2.2 bar and then the pump shouldn't run continuously even though it is rated as such.
Thanks John. I will get the plumber to check all the valves again, plus the charger as well as speak to ST.Very good, just to say it "cant" be any problem with a NRV in the mains as that is what is being boosted! so possibly NRV in the pump itself.
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