jrace wrote:Thanks for the info ...
jrace wrote:Still no improvement with steam.
From the looks of it, it seems that the Oscar's boiler is smallish and curiously enough, the spec sheet says nothing of boiler capacity.
In any case, lack of steam pressure means a low boiler temperature which in turn means low brew temperature.
You mention a steam problem but say nothing about how your shots are tasting.
So, how are
your shots? Is steam the only
issue you are having?
Provided the vacuum valve is working properly and does not leak, steam pressure will build up with the temperature rise inside the boiler which is in turn a product of the element turning on (when the boiler is below the thermostat/pressurestat's set point and off when it reaches that set point and so on.
That said, if you can steam some at first (but not as before) and then much less, you probably have some sort of problem with the pressurestat (for some reason) cutting off at a low pressure.
I see from on-line photos that the Oscar does not come with a boiler pressure gauge.
Once every couple of years and after a thorough clean-up, I check the pressure setting on my Pavoni EP (no pstat or
gauge) by sliding one end of a long piece of silicon tubing (the size that will take some effort to slip on to the steam pipe using a little lube) which has a small cheap ~2.0 bar pressure gauge attached on the other end.
This is what I clobbed together about 10 years ago as a temporary
Still works quite well.
ie: steam pipe ->*<- silicone tubing ->*<- 2.0 bar pressure gauge.
You'll figure one out for your Oscar.
Just be sure the tubing attachments to the steam pipe and gauge are firm, use thin zip ties (*) to keep the tubing from slipping off under pressure.
You slip it on the steam pipe when cold and once the boiler is up to temperature, open up the steam valve and check the reading.
It's an easy and inexpensive way to check the pressure at which the boiler is working when idle.
If you are not getting ~1.2 bar min. you'll have to check the piping from the boiler to the pressurestat, it may be clogged.