CafSuperCharged wrote:You have two boilers. The steam boiler has no connection with the 3way discharge.
The pump and brew boiler are connected to the group. The discharge is to release pressure on top of the puck so as you don't get sprayed when you take the portafilter out.
The steam boiler is connected to the steam valve and wand.

My question would be, as there is a pressurestat, if it is only for the steam boiler and why would you take a big, expensive Sirai when steam temperature might not be as critical as espresso temperature. Does the non-PID version have two pressurestats then, one for the steam boiler (Sirai?) and the other for the brew boiler?
Another interesting thing is how the brew boiler maintains group temperature. There must be a loop from the brew boiler into the group and back. But does it include a HX?


Regards
Peter
Netherlands
Europe

CaffeRoma wrote:If I try to do two latte's at once it is takes much too long and the steam pressure is at zero for the latter part of the process.
Anyone else experiencing this? Should I be adjusting the steam pressure-stat for this?
THANKS!

cafeIKE wrote:Clarification : The DUAL Boiler version has a PID for the BREW boiler and a pstat for the steam boiler. The brew boiler feeds the group via a thermosyphon and the boiler water makes the coffee.

CaffeRoma wrote:I got mine about a month ago, but have not really had the time to fully delve into the details of the machine. With the many questions I'm sure we will all be sharing in the next few months, the one thing that I have noticed is that the steam pressure (pre-set to 1.5 bar) drops off to 0.5 and then zero pretty quickly. I can really only steam single cappuccino amounts of milk maintaining a 1 - 1.5 pressure level. If I try to do two latte's at once it is takes much too long and the steam pressure is at zero for the latter part of the process.
Anyone else experiencing this? Should I be adjusting the steam pressure-stat for this?
THANKS!

networkcrasher wrote:I have the exact same issue. It's almost as if the boilers are backwards.

zin1953 wrote:OK, this could be a potentially serious flaw . . . regardless of whether the boilers are "backwards" or not, if you can't steam milk for lattes back-to-back without the pressure going to zero . . .

Me thinks this is not a good thing.

networkcrasher wrote:Can anyone give a good reason why the brew boiler is twice the size of the steam boiler? What benefit does one gain by having such a large brew boiler? Wouldn't recovery time be short from shot to shot if the brew boiler is smaller? That's the philosophy the S1 took.