On 3/5/23 10:18, 'Ben McCafferty' via Brewtus wrote:
Hey Sam—
It’s been a minute, but I’m pretty sure that the brew boiler has
priority if you’re on a US/120V system. So—the boilers get filled, and
then the brew boiler fires until it’s hot, then the steam boiler fires
until it’s hot.
If I had to guess, I’d say the brew boiler element is the culprit.
Checking resistance may not help you, since it can be intermittent and
may look fine when cold. Search my old posts on bypassing the
pressurestat—that may help you for troubleshooting. You should be able
to test by putting power to the brew boiler, and if it trips the
breaker right away (or as it’s heating), you’ve found the culprit.
Hope that helps, and I’ll be curious to hear what you find.
Since it is a Minore, I suspect Sam might possibly be in a 240VAC place
:) On my Minore-II the steam boiler heats first, there is no power to
the brew boiler until the pressurestat switches the AC supply to the
brew boiler. They are both 1.8kW elements. Looking at what passes for
a circuit diagram, the pressurestat, the little thermostat on top of the
boiler and the red neon are the only 'in circuit' elements when the
steam boiler is on. I'd check there is no partial short to ground on
those first.
Ben's suggestion of hot wiring each element in turn is how I have
diagnosed where my RCD trip was happening. There is a main feed to the
pressure stat, and it switches to either one of the others. One is the
brew boiler, the other is the steam. The steam boiler on mine has a
red wire. The brew boiler is white (and so, helpfully, is the feed in
:) ). The brew boiler is not a direct connection but goes via the
temperature control doofus, which many call the "PID" but it is not that
sort of controller :) To isolate the steam, you can just un-plug the
red wire (on mine) and move the brew boiler wire to the terminal the
steam was on.. That'll fire up the brew side of the machine. If it
trips when you do that, you've found an issue.. If it trips without
swapping it's the steam side.
Heating elements are prone to partial or complete shorts to ground due
to the way they are made. A static check for resistance might not show
a fault that permits a bit of current to flow and trip the breaker.
As I'm sure everyone is aware, there is live AC supply accessible inside
the tin, so once you open it up you need to be very careful...
Cheers
/Kevin
--
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 view this discussion on the web visit
https://groups.google.com/d/msgid/brewtus/7a21ad41-d127-9d94-96a8-b3b1c2f592c3%40gmail.com.
