The valve starts to gently hiss at 1.8, and blows off all the way just a bit 
over that, maybe 1.9.
best,
bmc

Sent from my apple IIe

> On Jul 26, 2015, at 16:12, Todd Salzman <[email protected]> wrote:
> 
> Yes, that could be problem. I am a little surprised that he pressure relief 
> valve did not start to blow off at 1.7 bar.
> We set the steam boiler to run between 1.3 and 1.4 bar.
> 
>> On Sun, Jul 26, 2015 at 4:59 PM, Ben McCafferty <[email protected]> wrote:
>> Thanks, Todd.
>> 
>> Since I just replaced both switches, I am not sure what to think. My best 
>> guess is that I had set the steam boiler pressure a little bit too high at 
>> 1.7, and so perhaps the boiler was going long enough to activate the 
>> overtemperature switch. I have turned the pressure back down to about 1.5 
>> and things seem to be working normally again.
>> Best,
>> bmc
>> 
>> Sent from my iPhone
>> 
>>> On Jul 26, 2015, at 03:27, Todd Salzman <[email protected]> wrote:
>>> 
>>> Most likely it is the over temperature switch.  If the pressure was set to 
>>> high the pressure relief valve on the boiler would blow off before  the 
>>> over temp switch would trip.
>>> 
>>> You may want to try switching the over temperature switches between the 
>>> brew and the steam boiler.  The brew boiler does not get as hot so the 
>>> switch may not trip as much while you get a new over temperature switch.
>>> 
>>> 
>>>> On Sat, Jul 25, 2015 at 12:01 PM, Graeme Burton <[email protected]> 
>>>> wrote:
>>>> May be a silly question but did you adjust the pressurestat after 
>>>> installation?
>>>> 
>>>> Graeme
>>>> From: Benjamin McCafferty
>>>> Sent: Sunday, 26 July 2015 00:00
>>>> To: [email protected]
>>>> Reply To: [email protected]
>>>> Subject: Re: Steam boiler overprescribing
>>>> 
>>>> Hi Todd and all,
>>>> Got the new pressure stat in yesterday, and the machine heated and 
>>>> functioned normally for the rest of the day.  This morning, I turned it on 
>>>> and the steam boiler didn't heat.  I reset the over-limit switch (new) on 
>>>> the steam boiler and it's now heating.
>>>> 
>>>> Is there something I should be concerned about here?  I'll see if it was a 
>>>> fluke, but not clear on why the new switch would pop. 
>>>> 
>>>> best,
>>>> bmc
>>>> 
>>>> Sent from my apple IIe
>>>> 
>>>>> On Jul 22, 2015, at 18:46, Benjamin McCafferty <[email protected]> wrote:
>>>>> 
>>>>> Thanks Todd.  Is the wire that provides power the common, normally open, 
>>>>> or normally closed?  I'll grab a multimeter but if you know right off 
>>>>> hand...I can be lazy...
>>>>> best,
>>>>> bmc
>>>>> 
>>>>> Sent from my apple IIe
>>>>> 
>>>>>> On Jul 22, 2015, at 18:07, Todd Salzman <[email protected]> wrote:
>>>>>> 
>>>>>> I would recommend, pulling  the wire off pressure stat that supplies the 
>>>>>> power to the  pressure stat and see if it keep over heating. 
>>>>>> If it turns off when you pull the wire you need a pressure stat.  If it 
>>>>>> keep heating you have another problem.
>>>>>> 
>>>>>>> On Wed, Jul 22, 2015 at 6:21 PM, Benjamin McCafferty <[email protected]> 
>>>>>>> wrote:
>>>>>>> Doing a little reading, seems pretty clear that my pressure stat has 
>>>>>>> failed also.  Quite a coincidence!  Anyway, please send any other 
>>>>>>> thoughts, but I'll order a new p-stat.  It's been in there for at least 
>>>>>>> five years; date of manufacture is 9/04 so it was on a shelf for at 
>>>>>>> least 3 years before installation, maybe more.
>>>>>>> best,
>>>>>>> bmc
>>>>>>> 
>>>>>>> Sent from my apple IIe
>>>>>>> 
>>>>>>> > On Jul 22, 2015, at 14:44, Ben McCafferty <[email protected]> wrote:
>>>>>>> >
>>>>>>> > Ahem. "Steam boiler over pressure"
>>>>>>> >
>>>>>>> > Sent from my iPhone
>>>>>>> >
>>>>>>> >> On Jul 22, 2015, at 14:30, Ben McCafferty <[email protected]> wrote:
>>>>>>> >>
>>>>>>> >> Hi all,
>>>>>>> >>
>>>>>>> >> More parts arrived today. I have new elements in both boilers, new 
>>>>>>> >> overtemperature switches on both boilers, new PID thermoprobe, new 
>>>>>>> >> power switch.
>>>>>>> >>
>>>>>>> >> When I switch the unit on, everything looks good but the steam 
>>>>>>> >> boiler continues heating on up to 2 bar, and then the overpressure 
>>>>>>> >> relief begins to blow so I switch the unit off and release some 
>>>>>>> >> pressure from the steam wand. I have turned my pressurestat (jaeger) 
>>>>>>> >> all the way down and no change. Any further ideas to help me solve 
>>>>>>> >> this lingering problem?
>>>>>>> >>
>>>>>>> >> Thanks all,
>>>>>>> >> Ben McC
>>>>>>> >> Sent from my iPhone
>>>>>>> >>
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