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How do I decalcify an Isomac Venus?
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ecelis
Senior Member


Joined: 19 Aug 2008
Posts: 22
Location: Tampa FL
Expertise: I live coffee

Espresso: Alex Duetto II
Grinder: Mazzer Mini
Roaster: Behmor
Posted Tue Aug 19, 2008, 8:21am
Subject: How do I decalcify an Isomac Venus?
 

I have lost water pressure on my Venus. It has a 3-way solenoid valve do I backflush? (there is no blank portafilter screen, do I purchase one?). Or do I add the solubilized decalcifyier (Cleancaf, Dezcal) to the water tank?

Thanks for the help
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stefano65
Senior Member
stefano65
Joined: 30 Oct 2004
Posts: 1,404
Location: Eugene OR
Expertise: Professional

Espresso: Vibiemme,Elektra,
Grinder: Vario,Macap,
Vac Pot: not
Drip: not
Roaster: not
Posted Tue Aug 19, 2008, 1:04pm
Subject: Re: How do I decalcify an Isomac Venus?
 

Venus is a single stage boiler
no backflushing
send me an email for descaling instruction

 
Stefano Cremonesi
info@espressocare.com
www.espressocare.com
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Frost
Senior Member
Frost
Joined: 26 Jul 2007
Posts: 2,070
Location: Sierra
Expertise: I love coffee

Espresso: Isomac Venus
Grinder: Lelit PL53
Roaster: Poppery I w/variac, MET, BT
Posted Tue Aug 19, 2008, 4:35pm
Subject: Re: How do I decalcify an Isomac Venus?
 

Venus does have a 3-way, so regular backflush is a good idea. I use water every day, cleancaf once a month or so. Descale as any single boiler. These address 2 different issues: one is coffee residue, the other is water scale. One is descaled with acid (the boiler) , and the coffee (3-way backflush) is cleaned with detergent. Never put detergent in your boiler.
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ecelis
Senior Member


Joined: 19 Aug 2008
Posts: 22
Location: Tampa FL
Expertise: I live coffee

Espresso: Alex Duetto II
Grinder: Mazzer Mini
Roaster: Behmor
Posted Wed Aug 20, 2008, 5:47am
Subject: Re: How do I decalcify an Isomac Venus?
 

The machine did not come with a blank (closed) portafilter. So I guess I need to get one to do the backwash or can I put some heavy duty plastic to block the water flow...?
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ecelis
Senior Member


Joined: 19 Aug 2008
Posts: 22
Location: Tampa FL
Expertise: I live coffee

Espresso: Alex Duetto II
Grinder: Mazzer Mini
Roaster: Behmor
Posted Wed Aug 20, 2008, 4:55pm
Subject: Re: How do I decalcify an Isomac Venus?
 

Thanks for the suggestions.
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fifthgen
Senior Member


Joined: 23 Dec 2006
Posts: 577
Location: Eastern MA
Expertise: I like coffee

Espresso: Isomac Zaffiro, Astoria CKX
Grinder: Maz. Major, Casadio, Isomac...
Drip: Capresso st600 chemex,
Roaster: Karma Coffee, Black Cat...
Posted Wed Aug 20, 2008, 8:25pm
Subject: Re: How do I decalcify an Isomac Venus?
 

Has it been sitting around for a long time?  You might need to rebuild or replace the pump.  They can scale up.

As much as I admire Stefano, perhaps he will clarify about not backflushing.  He has helped me personally and is generous to post here at all. More of an expert than I will ever be, and a generous man.  Good to do business with.

I would descale several times following the same proceedures as for a silvia or any other high quality machine. Should be easy to find.

I'll check back in this weekend.  If you need pointers to the pump rebuild click here  Whoever posted this has helped me a lot.  This will give you insight into pretty much any inexpensive pump. A logical person can work it out on their own but why not use thie generous help.

You might want to descale more often, source softer water, etc.  For this one I might go for dezcal or another super-effective solution.  I descale with citric acid, (it's cheap) but have yet to let one get that far.  Probably will next week 'cause I am scary busy.

 
Good coffee to you and your guests
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Frost
Senior Member
Frost
Joined: 26 Jul 2007
Posts: 2,070
Location: Sierra
Expertise: I love coffee

Espresso: Isomac Venus
Grinder: Lelit PL53
Roaster: Poppery I w/variac, MET, BT
Posted Wed Aug 20, 2008, 9:15pm
Subject: Re: How do I decalcify an Isomac Venus?
 

You will need to provide more detail for anyone to help diagnose the problem(s). Do you have any water flow when you turn on the pump? (from steam wand or group) does the pump make any noise when you turn it on? Routine de-scale and backflush is a good idea, but if there is no water pumping through the machine you will not be able to do either.
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stefano65
Senior Member
stefano65
Joined: 30 Oct 2004
Posts: 1,404
Location: Eugene OR
Expertise: Professional

Espresso: Vibiemme,Elektra,
Grinder: Vario,Macap,
Vac Pot: not
Drip: not
Roaster: not
Posted Thu Aug 21, 2008, 7:13am
Subject: Re: How do I decalcify an Isomac Venus?
 

Right single stage with solenoid .......................................
too many models to keep track
yes can be backflush but just like a silvia very short session
howevere like mention above if there is no water coming out to star with it's pretty useless
BEFORE doing much more the the machine remove one of the wire from the heating element
so there is no chances to burn it out in the process
like mention above more info can help
e little things worth a try:
with the machine unplugged
you can open the steam valve and blow some compress air from the pump inlet and see if air reaches the opening
( sometimes this will unstuck the pump if the pump is stuck)
then you can remove the solenoid valve and grouphead parts to see if the clog is there ( must likely yes it will there)

 
Stefano Cremonesi
info@espressocare.com
www.espressocare.com
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xdavez
Senior Member
xdavez
Joined: 21 Nov 2007
Posts: 1,157
Location: Los Angeles
Expertise: Professional

Espresso: La Spaziale Vivaldi II
Grinder: Mazzer mini
Vac Pot: none
Drip: Technivorm
Posted Thu Aug 21, 2008, 4:15pm
Subject: Re: How do I decalcify an Isomac Venus?
 

agreeing with Stefano +

Unless the machine has been FLOGGED for years the pump is fine.  they don't "scale up "

95% certain the machinet is clogged.  detach the line from the pump output -- look for it to pull water from the tank  and spray a geyser of water!

follow the unclogging instructions from Stefano -- the pump is the very last thing on the list of causes

BUT always the FIRST thing people suspect!  don't start shotgunning parts at the machine


BTW, rebuilding / tearing them apart is pointless.  as new ones are only about $40.00

Dave call me  877 286 2833

www.hitechespresso.com
Saeco / gaggia service SE
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Dink0617
Senior Member


Joined: 23 Oct 2007
Posts: 101
Location: Seattle
Expertise: I love coffee

Espresso: Astra Pro, Sama Export, La...
Grinder: Ascaso I-Mini, Rossi RR45,...
Vac Pot: Silex
Drip: Krups FME-4, Chemex
Roaster: Hearthware Precision, Gene...
Posted Fri Aug 22, 2008, 1:09am
Subject: Re: How do I decalcify an Isomac Venus?
 

I am not familiar with the Venus but how often do you remove and clean your showerscreen?
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