Hi Rob I think that I may have worked out what is happening, please let me know what you guys think
- The group head boiler is saturated i.e. no air in it for expansion - I noticed this phenomenon especial when descaling the boiler so lots of cooler water going into the brew head boiler My thinking is that cold water is filling up the boiler and then being heated, as it is heated it expands, as the boiler is saturated there is not a lot of room for the pressure to be absorbed resulting in high pressures being created quite quickly, sort of like a hydraulic brake system. Pressure get to 12Bar and the OPV valve opens to release it. Once temp stabilises, no more increase in pressure. Can't think of any other logical explanation. JohnB On Sat, Feb 13, 2010 at 6:40 AM, Orianm42 <[email protected]> wrote: > John, > > Since my rotary upgrade, my machine does the same thing. I noticed > it drips when the brew boiler heating element goes on and stops when > it turns off. I never really worried about it too much. I assumed the > excess water in the previous configuration was was simply feed back > via the de aerator hose. > > Rob Combs > > > On Feb 10, 12:21 pm, John Brinkman <[email protected]> wrote: >> Hi >> >> I recently upgraded a Brewtus II Vibe pump with a rotary pump upgrade >> kit, a very strange things keeps on happening and I am not sure what >> is causing it so I thought I would pose the question to the user group >> and see if anyone has any bright ideas. >> >> Brewtus II >> Rotary pump upgrade >> not connected to mains water yet, just piped into a jug >> >> Can pull a shot fine but when finished and the machine is standing, >> the group head pressure gauge starts rising and goes all the way up to >> 12 Bar. >> Water also starts dripping from the OPV valve into the drip tray >> If I move the handle to the middle position, it does vent of excess >> pressure so there is pressure there and the gauge moves back to +-1bar >> Boiler temp is set for 91c >> >> Any ideas what could be causing the pressure rise in the machine? >> >> Regards >> >> JohnB > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/brewtus?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/brewtus?hl=en.
