I live in Azerbaijan where I have a Wilo MC605-EM pump attached to a Wilo LRS 50/10H diaphragm expansion vessel, which pumps water into my house on demand. We have a large water storage tank sitting between the mains and the pump so there is effectively no water pressure, the pump sucks water out of the tank and pushes it into the house.
The meter on the pump outlet by the braided hose is reading 3.5 bar which I guess is just the pressure in the pipework until someone opens a tap.
The pump is misbehaving, going in short bursts of brrr-clunk-silence-brrr-clunk-silence and the water comes out of the taps in the house in bursts. As I understand it, I need to re-pressurise the expansion tank, but I can't find any good instructions on how to do that. I believe that if I don't do it soon it may damage the expansion vessel which I think has a butyl rubber diaphragm.
There's a label on the tank that just says "in case of insufficient air pressure please empty all water from the tank and replenish dry air by using a compressor". I do have an air compressor available.
The pump is connected by threaded fittings on the top and left of the picture. I can undo these easily enough, and that will drain the pump - but I think not the expansion tank as that sits underneath connected by a large braided hose. So how do I empty the water from the tank? And when I've done that, what pressure to I put back into the expansion tank?
The meter on the pump outlet by the braided hose is reading 3.5 bar which I guess is just the pressure in the pipework until someone opens a tap.
The pump is misbehaving, going in short bursts of brrr-clunk-silence-brrr-clunk-silence and the water comes out of the taps in the house in bursts. As I understand it, I need to re-pressurise the expansion tank, but I can't find any good instructions on how to do that. I believe that if I don't do it soon it may damage the expansion vessel which I think has a butyl rubber diaphragm.
There's a label on the tank that just says "in case of insufficient air pressure please empty all water from the tank and replenish dry air by using a compressor". I do have an air compressor available.
The pump is connected by threaded fittings on the top and left of the picture. I can undo these easily enough, and that will drain the pump - but I think not the expansion tank as that sits underneath connected by a large braided hose. So how do I empty the water from the tank? And when I've done that, what pressure to I put back into the expansion tank?
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