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Espresso: Questions and Answers
Open the steam handle for you initial setup
Rocket R58 Double Boiler
Rocket Espresso R58 Double Boiler -  Everything you need for the perfect shot!
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app6cxc
Senior Member


Joined: 15 Mar 2014
Posts: 11
Location: NJ
Expertise: I love coffee

Espresso: Rocket R58 V2
Posted Fri Apr 11, 2014, 5:37am
Subject: Open the steam handle for you initial setup
 

The instruction says you supposed to open the steam handle when  you first turn your machine on.
Because your boiler has air and as water gets into boiler air has to go out.
And I forgot to do this when I first turned my machine on.
I just want to know if this is really bad for the machine.
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brianl
Senior Member


Joined: 1 Dec 2012
Posts: 441
Location: Chicago IL
Expertise: I love coffee

Espresso: Gaggia Classic (w/PID)
Grinder: Baratza Vario
Drip: chemex
Posted Fri Apr 11, 2014, 7:19am
Subject: Re: Open the steam handle for you initial setup
 

app6cxc Said:

The instruction says you supposed to open the steam handle when  you first turn your machine on.
Because your boiler has air and as water gets into boiler air has to go out.
And I forgot to do this when I first turned my machine on.
I just want to know if this is really bad for the machine.

Posted April 11, 2014 link

Well I have my espresso machine on a timer so obv I don't do it. Never have had a problem. Now, when I steam milk, I always immediately run water through the wand.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,672
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 Fri Apr 11, 2014, 7:22am
Subject: Re: Open the steam handle for you initial setup
 

No, it will not hurt the machine at all, what DOES happen is that it will not heat up properly until the excess pressure is vented from the boiler.

The way your machine regulates it's temp is by how much pressure is in the steam boiler. The boiler is closed unless it has a vacuum breaker. When closed and at room temp, the pressure is the same inside and outside the boiler. When you turn the machine on to warm up, the closed boiler heats up and so does the air in the boiler. This generates pressure in the boiler. The pressure activates the Pstat which regulates the temp of the boiler. This turns the heater off too soon and the machine is not properly warmed up. When you let this false pressure out of the boiler, the Pstat then senses that the pressure is too low and it turns the heater on to bring up pressure in the boiler.

A vacuum breaker does two things. One, it lets the pressure be equal at room temp both inside and outside the boiler. If it is sealed, it can be at a negative pressure compared to the air around it and then the possibility of sucking something into the boiler such as milk in the steam wand becomes real, the vacuum breaker prevents this possibility.
Two, the vacuum breaker lets pressure out of the boiler until it is actively producing steam at which point the steam being generated inside the boiler "blows" the vacuum breaker shut and it is sealed, allowing the boiler to pressurize and the machine to reach operating temp.

False pressure turns the Pstat off too soon and the machine does not get hot, no harm done, well except to need to wait longer to warm the machine up to operating temp once you do vent the false pressure.

If your machine does not have a vacuum breaker, you need to vent this pressure off yourself at startup of the machine. I thought for sure your machine had a vacuum breaker but I could be wrong, I need to look that up.

EDIT, nevermind, you have the DB PID controlled machine, I saw Rocket and did not read the mod number. No you should have no issues, your temps are set by a PID, I have no idea why they want you to bleed the false pressure, Is that in the manual?

 
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Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

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app6cxc
Senior Member


Joined: 15 Mar 2014
Posts: 11
Location: NJ
Expertise: I love coffee

Espresso: Rocket R58 V2
Posted Fri Apr 11, 2014, 7:58am
Subject: Re: Open the steam handle for you initial setup
 

Yes, the manual recommends to open the steam handle when I first starting up the machine.
I read that after I turned my machine on with steam handle close. =)
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