Posted Thu Sep 26, 2013, 8:19am Subject: MCAL Pressure problem
Over the past two months, my MCAL appears to be increasingly having problems coming up to and holding its operating pressure. The pressure gauge, which had been consistently reading between .8 and 1.2 bar, now ranges from .6 to .8 bar. When cold, the gauge registers about .2 bar.
Iím not sure whether this is a problem with the gauge or the pressurestat. I believe that I would need to adjust the bolt on the pressurestat to move the plunger back from the switch in order to increase the pressure at which it trips. Is that correct?
Does anyone have any thoughts on how I might determine the source of this problem?
It's is kind of "normal" or to be expected for these gauge to eventually stop going back to zero,
and generically speaking when that happens, they are still reading correctly when they are going UP, (needle can be reposition as well) I say generically NOT all the time,
saying so, if you pressure coming out form you steam valve still feel nice and strong, then you might have a problem just with the gauge, if not you can try adjusting the pstat or before doing so look inside the boiler for scale build up, if so descale, clean the PRESSURESTAT PIPE then see if the pstat behave or needs to be replaced
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