I have an Expobar Office Pulsar that I bought in 2006. The water temperature has been gradually dropping to around 150 degrees, as measured at the hot water dispenser. And crema is almost nonexistent. I have read that these machines run hot. How do I make it run hot again? I have an excellent location diagram for the thermostat and pressurestat, and am pretty handy at repairing machines. Any help is much appreciated.
Announcement
Collapse
No announcement yet.
Expobar water temperature
Collapse
X
-
Re: Expobar water temperature
I believe this is an HX loop machine. Which means the temperature is set by boiler pressure. So as far as I can see you need to up the boiler pressure a tiny bit.
Id be wondering why it dropped (maybe the spring in the pressurestat is a getting a bit tired). Im also wondering why it has a thermostat - if it is an HX I cant see how it could use one!
Anyway - if youre seeing 150 (I assume F - heathen units :
) then you only have about 0.25bar pressure in the boiler (so steam will be not very impressive). To get to 100C you need basically 1bar. Adjustments on most pressurestats are a bit twitchy though (in my limited experience). Id be wanting a pressure gauge so I knew I wasnt making a bomb in the kitchen when adjusting... You can do a cheapie with a piece of 8mm fuel hose on the steam wand and a pressure gauge. Wont be 100% accurate, but should give an indication.
Most of the machines Ive had have been about 1.1 to 1.25 bar.
Hope this is of some help.
/Kevin
- Flag
-
Re: Expobar water temperature
Thanks Kevin. I havent taken off the covers so dont know if the schematic I have is the same for my machine and if it has a thermostat. The wand /pressure gauge is a good idea. I agree that the English system is antiquated, especially since we dumped the King. AU kicked out the Queen? I didnt know.
- Flag
Comment
-
Re: Expobar water temperature
Also, have you done a descale recently? If. Of there could be lots of ware scale in the HX loop insulating the brew water from the temp in the boiler.
Also, doesnt the office have a boiler pressure gauge on it?
- Flag
Comment

Comment