Jack14 Senior Member Joined: 8 Dec 2013 Posts: 2 Location: Canada Expertise: Just starting
Posted Sun Dec 8, 2013, 6:37pm Subject: Pressure to high
I have a La Scalla, Butterfly model. The pressure rises too high and pops the pressure relief valve. Had machine into shop on a few occasions. Couldn't resolve the problem. Ultimately, the stock relief value was replaced with a Cimbali commercial relief valve. Problem fixed temporarily, but now Cimbali relief valve popping. Before my dog has a heart attack, does any one have a suggestion to put an end to this rather annoying problem?
SStones Senior Member Joined: 24 Nov 2012 Posts: 452 Location: Canada Expertise: Professional
Espresso: Giga 5, ECM Giotto, Rocket... Grinder: Anfim Milano-Best Vac Pot: No :( Drip: Some $30 thing from Walmart Roaster: I buy pre-roasted.
Posted Sun Dec 8, 2013, 8:06pm Subject: Re: Pressure to high
Check resistance from each terminal of the Element to boiler ground. If there's any continuity at all, that short will constantly be heating. Replace the element if it has shorted to ground, it is quite likely cracked.
Check the pressostat. Does the boiler not heat at all with the p-stat disconnected? If it's heating with the wire removed from the p-stat, it has to be a shorted element.
Does the relief pop at less than 1.5 Bar? If not, it's working well and doesn't need replacement.
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