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HX - How to empty Boiler (wega mininova)
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andysims
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Joined: 7 Jan 2008
Posts: 7
Location: denmark
Expertise: Just starting

Posted Sat Oct 27, 2012, 4:45am
Subject: HX - How to empty Boiler (wega mininova)
 

Hi

I have been descaling my wega mininova but cant seem to empty the boiler completely
Can anyone help me as would like to get the solution out:(

I reckon on this one only the steam wand connects to the boiler and the rest to the hx

brgds
andy
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NobbyR
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NobbyR
Joined: 10 Jul 2011
Posts: 2,023
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Sat Oct 27, 2012, 6:50am
Subject: Re: HX - How to empty Boiler (wega mininova)
 

This step-by-step instruction of how to descale a HX machine was specifically written for a Isomac Millenium, but it should basically work for any HX model:
  1. Let the machine heat up for 5 minutes.
  2. Remove the cartridge from the filter, if fitted.
  3. Put the descaling agent in the water tank according to instructions given on the bottle or package. Be prepared to tilt the container to prevent the machine from switching off on account of low water levels and take care never to let the pump operate without any water. Therefore, add more descaling solution if necessary. Another alternative is to leave the container full of water and place the hose in a separate jug containing descaling solution. This latter option has the advantage that you can see when enough water has flown through the machine.
  4. Let the water run through the HX line until you can smell the descaling solution.
  5. Let the water run through the steam wand until it begins to smell of descaling agent.
    (Points 4 and 5, when performed in this order, ensure that the pipes of the unit and on the steam wandare filled with descaling solution.)
  6. Insert the blindfilter in the portafilter and insert it into the brew group.
  7. Lift the lever for 6 to 8 seconds, then switch off the machine. This will turn off the pump, given that you do NOT want the unit to lose pressure (make sure that the unit E61 is full of descaling solution).
  8. Leave the machine switched off overnight (approximately 12 hours) then empty out the water tank.
  9. Clean the tank and fill it with clean water.
  10. Depressurise the unit (by lowering the lever).
  11. Turn on the machine and wait a few minutes for it to heat up. Insert the blindfilter and put the portafilter in the brew group, backflush the machine 6 or 7 times.
  12. Remove the portafilter.
  13. Dispense water through the unit for periods of 20 seconds, waiting for 15 seconds between each one. Do this about five times.
  14. Dispense water from the steam wand until you can no longer smell any descaling agent.
  15. dispense water through the unit until you can no longer smell any vinegar;
  16. Replace the blindfilter and backflush 5 more times.
  17. Switch off the machine;
  18. Fill the tank with clean water and start the machine again as described in the instruction manual.
  19. Pull 30 - 40 cc of water from the brew group into a container and make sure that it does not smell of descaling agent or taste unpleasant. Dispense the same amount of water through the steam nozzle into a container and make sure that it does not smell or taste unpleasant. If any unpleasant smell or taste remains, distribute more water through the unit and steam nozzle and check it again.
  20. The machine is now ready to be used again.

If someone should know good reason why it might not work for a Wega Minonova, please tell.

 
***
"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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qualin
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qualin
Joined: 30 Jun 2012
Posts: 653
Location: Calgary, AB
Expertise: I love coffee

Espresso: Izzo Alex Duetto 3
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Posted Sat Oct 27, 2012, 11:45pm
Subject: Re: HX - How to empty Boiler (wega mininova)
 

Just to clarify, what is the most ideal descaling agent for a double boiler?

I'm under the impression that Lemon Salt (ie. Citric Acid) is the most ideal agent because it is food safe and doesn't taste horrible. As opposed to using malt vinegar, which I understand isn't supposed to be used in any machine with an enclosed boiler.

I can certainly say without a doubt that using CLR is NOT recommended for any reason, because CLR is not a food safe product.

 
Garbage In, Garbage Out, for every step of the process. From Beans to grinder, grounds to machine, coffee to cup.
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NobbyR
Senior Member
NobbyR
Joined: 10 Jul 2011
Posts: 2,023
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Sun Oct 28, 2012, 12:04am
Subject: Re: HX - How to empty Boiler (wega mininova)
 

Even though some manufacturers like Isomac, for example, actually advise to use vinegar for descaling, I wouldn't recommend it. The safest way is probably using a commercial descaling agent (powder or liquid), safest at least as far as the warranty of the machine is concerned. However, most professional agents actually contain citric acid, so it's probably just as safe to use that as long as you dose correctly.

 
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"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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