I wonder what would happen with the steam leads connected to the brew boiler?
On Mon, Aug 22, 2016 at 11:48 AM, Benjamin McCafferty <[email protected]> wrote: > OK, but why would it register the ground fault from the > non-pstat-connected leg when cold, i.e when no power is going to the > element yet? > > b > > On Aug 22, 2016, at 08:33, Graeme Burton <[email protected]> wrote: > > I think tests Stevie has done isolate the problem to the brew element. And > I think it's power being conducted to earth via the element leg not > connected to the pstat. May not be able to measure resistance from leg to > boiler with handheld meter. It appears to be a gfi fault so it can be > caused by very little current going to earth. Prob need an insulation break > down tester to measure. Hmm but always ???! > > Graeme > *From: *Benjamin McCafferty > *Sent: *Monday, 22 August 2016 23:19 > *To: *[email protected] > *Reply To: *[email protected] > *Subject: *Re: Dead short? > > Yeah, Graeme, trying to sort this in my head also. My memory is that you > have 120 to the “in” side of the pstat, with continuity to the normally > closed terminal (steam boiler) so it would send power to steam when cold > and under pressure. Once steam comes to pressure, the pstat switches to > normally open terminal and sends power to brew element (via PID for temp > control, yes?). That was my point—if the gfi pops on brew wiring when > cold, I’m still not clear that it’s just the element. And especially since > he got normal readings for resistance on both elements. If the element is > cracked/shorting via water to ground, I’d expect resistance to be something > other than normal, unless the crack was appearing when hot, which it’s not. > > Could a pstat wire (or other hot wire) be shorting to ground? But wouldn’t > that cause the gfi to trip for either boiler (i.e. since if it was steam, > it would trip when cold, brew would trip when hot, both should trip if the > short was prior to the input side of the pstat?). > > More thoughts? > > b > > > On Aug 22, 2016, at 08:02, Graeme Burton <[email protected]> wrote: > > Good thinking Ben. But I think only one element wire is switched through > the pstat? Therefore there is power to one, side of the element and that > can then short to earth no matter what the pstat is doing. Does that sound > right? > > Graeme > *From: *StevieG. > *Sent: *Monday, 22 August 2016 22:58 > *To: *Brewtus > *Reply To: *[email protected] > *Subject: *Re: Dead short? > > Hi Ben - It pops the GFI with everything cold, and only when brew was > connected and steam disconnected, but not the other way around. With the > steam boiler normally wired and the brew boiler not connected, everything > functions. > > Will call Todd today to order a part, then on with the fun :) > > Thanks much, > Steve > >> >> > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/brewtus. > For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/brewtus. > For more options, visit https://groups.google.com/d/optout. > > > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/brewtus. > For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/brewtus. > For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/brewtus. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. 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