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Bezzera bz-40 level probe and brew temp
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Evascroll
Senior Member


Joined: 15 Mar 2013
Posts: 33
Location: PuertoRico
Expertise: Just starting

Posted Sun Apr 7, 2013, 4:04pm
Subject: Bezzera bz-40 level probe and brew temp
 

Hello to all' this past weekend have been a blast!! I recently bought a bezzera bz-40 as off a update to my delonghi 155(5year service no problem) sow after a couple problem (bad pump,check valve and supresoin valve) do a mod fron the previus owner. i belive a have it restore to i working status! The last problem was i short level probe. After reading about the brewing temp and how afect the taste of the shot(sour and bitter) i start to messure the temp in my bz and this was the result (1.4 bar at the PRESSOSTAT)
No flushing 178 f
3sec flush  170 f
6sec flush (water stop dancing) 165 f
9sec flush 158f
I did the test 4 time all same result i knew it was off
But how do i adjust the temp in a hx machine sow the journiey began!sow after reading and reading and reading some more i found out that the temp in hx machine is a realtionship with the bar pressure!( but wait i have 1.4bar but the pressure is no mach) sow i star to think what could affect the temp (water volumen)
Sow i check how the water sistem in the boiler work (level probe) and i take it out and wala!! One off the probe was cut! (original is one 70mm and the other is 80mm) i have both 70mm
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Evascroll
Senior Member


Joined: 15 Mar 2013
Posts: 33
Location: PuertoRico
Expertise: Just starting

Posted Sun Apr 7, 2013, 4:12pm
Subject: Re: Bezzera bz-40 level probe and brew temp
 

I solder the probe (add 10mm steinless steal) and this is my new temp at 1.4bar in the pressosta

No flush 208 f (30f more)
3 sec flush 194f (24f more)
6sec flush186f(21f more)
9sec flush 180f(22 f more) i was using  for messure the foam cup metod is not 100% acuarted but it give a idea
Why this result ???? It is the water volumen ?????? I notice it have more steam and it recover faster!!!!
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