Holy Cow guys, this Bezzera Im installing isnt going in without a fight!!
On the bench I was just running direct line pressure into the machine, we have quite high pressure here, around 650 Kpa. On the permanent install Im using a 350 Kpa PLV to regulate the pressure. Its sharing a connection with a flick mixer and it definitely needs the PLV as those mixers really give the line a hard time, I had no idea just how much until I saw it on the machines gauge.
When I went to adjust the pump for the reduced line pressure I simply cant get enough pressure differential with 350 Kpa. Even wound fully in I can only get about 8 bar. It adjusts, just not up high enough. I took the PLV out, at that outlet we have about 5 Kpa, and I can adjust the pump pressure up to 10 bar with a blind portafilter, and back down to normal brewing pressures with a shot, no problems. When running the pressure is stable.
I would prefer to run as low input pressure as possible, so dont want to exchange the 350 Kpa PLV for a 500. Im assuming that even if sucking (negative inlet pressure), the Procon pumps should be able to be adjusted up to 9 Bar without any difficulty? These pumps arent cheap so Im a bit peeved right now. Before I go fork out yet more hard earned on a new pump I thought Id get the opinions of others as to whether it IS indeed likely that its fried, or possibly something else Ive overlooked? BTW the pump looks like a series 1 and has been thoroughly descaled and the inlet filter is clean.
Cheers,
Pete
On the bench I was just running direct line pressure into the machine, we have quite high pressure here, around 650 Kpa. On the permanent install Im using a 350 Kpa PLV to regulate the pressure. Its sharing a connection with a flick mixer and it definitely needs the PLV as those mixers really give the line a hard time, I had no idea just how much until I saw it on the machines gauge.
When I went to adjust the pump for the reduced line pressure I simply cant get enough pressure differential with 350 Kpa. Even wound fully in I can only get about 8 bar. It adjusts, just not up high enough. I took the PLV out, at that outlet we have about 5 Kpa, and I can adjust the pump pressure up to 10 bar with a blind portafilter, and back down to normal brewing pressures with a shot, no problems. When running the pressure is stable.
I would prefer to run as low input pressure as possible, so dont want to exchange the 350 Kpa PLV for a 500. Im assuming that even if sucking (negative inlet pressure), the Procon pumps should be able to be adjusted up to 9 Bar without any difficulty? These pumps arent cheap so Im a bit peeved right now. Before I go fork out yet more hard earned on a new pump I thought Id get the opinions of others as to whether it IS indeed likely that its fried, or possibly something else Ive overlooked? BTW the pump looks like a series 1 and has been thoroughly descaled and the inlet filter is clean.
Cheers,
Pete

). I cant remember if there is a way to tell which one it is but if you ring Roehlen Industries in Melbourne (03) 9580-4155 you will be able to get the correct one for not to many $$, they also have rebuilt pumps for sale as well (worst case)
Oh well
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