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Isomac Zaffiro overheat problem
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Discussions > Espresso > Machines > Isomac Zaffiro...  
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amufe
Senior Member


Joined: 13 Aug 2011
Posts: 13
Location: Hong Kong
Expertise: I love coffee

Espresso: Isomac Zaffiro
Grinder: EM0480
Drip: Hario
Posted Tue Aug 27, 2013, 2:43am
Subject: Isomac Zaffiro overheat problem
 

i have got a Isomac Zaffiro last few weeks
i found that it get overheat easily
when the brewing light go off
i flush the group
just like this video http://www.youtube.com/watch?v=SxfxZOjCFKc (0:03)
is it normal ?

any solutions?

please help

John
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 506
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Tue Aug 27, 2013, 3:10am
Subject: Re: Isomac Zaffiro overheat problem
 

That isn't terribly unusual, unless I'm missing something.
You might want to flush it longer than you did in the video. Let it run until the steam rushing through the head is replaced by water flowing through. The steam will negatively affect the flavour of the coffee, you'll get used to the sound and timing of the cooling flush in no time.

You could reduce your boiler pressure to shorten the duration of the cooling flush, if you are okay with reducing your steam production.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,949
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Aug 27, 2013, 5:39am
Subject: Re: Isomac Zaffiro overheat problem
 

Your shot ran about 45 seconds so I would back off the grind a little and as was already said, you are not flushing enough, you need a steady stream of water, not steam from the group head before pulling your shots. Other than that, it all looks pretty normal.

The spec sheet does not list a "brew light" and I would not expect to see one, this is a HX machine and it does not operate in any way like a SBDU with  a heater on light.

I have no idea what you are referring to when you said

"it get overheat easily when the brewing light go off i flush the group"

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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amufe
Senior Member


Joined: 13 Aug 2011
Posts: 13
Location: Hong Kong
Expertise: I love coffee

Espresso: Isomac Zaffiro
Grinder: EM0480
Drip: Hario
Posted Tue Aug 27, 2013, 7:18am
Subject: Re: Isomac Zaffiro overheat problem
 

calblacksmith Said:

Your shot ran about 45 seconds so I would back off the grind a little and as was already said, you are not flushing enough, you need a steady stream of water, not steam from the group head before pulling your shots. Other than that, it all looks pretty normal.

The spec sheet does not list a "brew light" and I would not expect to see one, this is a HX machine and it does not operate in any way like a SBDU with  a heater on light.

I have no idea what you are referring to when you said

"it get overheat easily when the brewing light go off i flush the group"

Posted August 27, 2013 link

sorry for my poor english
what i mean is when the machine was ready,the middle light went off,
i did a quick flush,just the same as the video

i will do a longer cooling flush next time
thanks for the replies
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amufe
Senior Member


Joined: 13 Aug 2011
Posts: 13
Location: Hong Kong
Expertise: I love coffee

Espresso: Isomac Zaffiro
Grinder: EM0480
Drip: Hario
Posted Sun Sep 1, 2013, 1:42am
Subject: Re: Isomac Zaffiro overheat problem
 

After I adjust the thermostat ,I solve the first problem.
However I get a second problem,when I turn on the machine,
It show 11 bar.
Then the machine is ready,I lift the lever up,
It show 0bar.
I have tried to use a blind basket,the bar rise to 9,
Is it normal?
Do I need to worry about this?
Thanks a lot
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