Gotcha. I thought it was reverse from this Graeme—that power goes to one side of the pstat, and the closed contact sends power to one side of the element—and the other side of the element goes to neutral. If it is as you describe, then the pstat would be connected to neutral and I’m almost certain that’s not the case.
I’ll try to pull my cover off later and have a peek. bmc > On Aug 22, 2016, at 08:49, Graeme Burton <[email protected]> wrote: > > Isn't it getting power to that leg during one part of the AC cycle? It > doesn't heat because the pstat is causing an open circuit to the other leg. > > Graeme > From: Benjamin McCafferty > Sent: Monday, 22 August 2016 23:49 > To: [email protected] > Reply To: [email protected] > Subject: Re: Dead short? > > 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] >> <mailto:[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] <mailto:[email protected]> >> Reply To: [email protected] <mailto:[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] >>> <mailto:[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] <mailto:[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] >>> <mailto:[email protected]>. >>> To post to this group, send email to [email protected] >>> <mailto:[email protected]>. >>> Visit this group at https://groups.google.com/group/brewtus >>> <https://groups.google.com/group/brewtus>. >>> For more options, visit https://groups.google.com/d/optout >>> <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] >>> <mailto:[email protected]>. >>> To post to this group, send email to [email protected] >>> <mailto:[email protected]>. >>> Visit this group at https://groups.google.com/group/brewtus >>> <https://groups.google.com/group/brewtus>. >>> For more options, visit https://groups.google.com/d/optout >>> <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] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/brewtus >> <https://groups.google.com/group/brewtus>. >> For more options, visit https://groups.google.com/d/optout >> <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] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/brewtus >> <https://groups.google.com/group/brewtus>. >> For more options, visit https://groups.google.com/d/optout >> <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] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/brewtus > <https://groups.google.com/group/brewtus>. > For more options, visit https://groups.google.com/d/optout > <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] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/brewtus > <https://groups.google.com/group/brewtus>. > For more options, visit https://groups.google.com/d/optout > <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.
