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Espresso: Lever Espresso Machines
Commercial lever machine on gas only
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skydragondave
Senior Member


Joined: 18 Feb 2013
Posts: 167
Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
Grinder: Commercial Only
Roaster: Has Garanti HG5
Posted Sun Apr 28, 2013, 6:02pm
Subject: Commercial lever machine on gas only
 

]Can this be done? I've got a Brasilia Antonella 2gp lever machine with gas kit and have found the gas kit to be extremely sluggish, it takes over an hour to get up to 1.5 bar and needed two purges to stabilize. Clearly the gas kit is undersized or defective, but not too sure how to overcome this. My guess is that the gas kit is simply meant to augment the electric heating element and speed recovery and warmup, but this machine is to be used in a mobile setup where power isn't available. Is it possible to run a commercial gas lever machine exclusively on gas while still producing good shots? Here's a photo of it. Thanks for any help and advice.

Click Here (i57.photobucket.com)
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GVDub
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Joined: 25 Jan 2008
Posts: 864
Location: Los Angeles, CA
Expertise: I live coffee

Espresso: Londinium I, Arrarex...
Grinder: Gaggia MD85, Dienes Mokka,...
Drip: Behmor Brazen, Abid Clever
Roaster: Behmor 1600+
Posted Sun Apr 28, 2013, 7:29pm
Subject: Re: Commercial lever machine on gas only
 

Are you running propane or natural gas? Which gas are the burners designed for? Propane contains approximately two and a half times the energy of natural gas, and they each require different burner designs and line pressure. I've seen systems running on nothing but gas working beautifully, so it's nothing inherent in gas.
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skydragondave
Senior Member


Joined: 18 Feb 2013
Posts: 167
Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
Grinder: Commercial Only
Roaster: Has Garanti HG5
Posted Sun Apr 28, 2013, 8:10pm
Subject: Re: Commercial lever machine on gas only
 

Thanks for the reply.
I have the machine hooked up to a propane bottle. I've wondered whether the orifice is sized for propane or natural gas. How can I tell the difference and where would I find the parts to correct this?
Best regards
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skydragondave
Senior Member


Joined: 18 Feb 2013
Posts: 167
Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
Grinder: Commercial Only
Roaster: Has Garanti HG5
Posted Sun Apr 28, 2013, 8:12pm
Subject: Re: Commercial lever machine on gas only
 

Actually, judging by your mathematics with the propane fuel having more punch, the machine should be on fire right now so maybe the problem is elsewhere or I'm simply asking too much of it?
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GVDub
Senior Member


Joined: 25 Jan 2008
Posts: 864
Location: Los Angeles, CA
Expertise: I live coffee

Espresso: Londinium I, Arrarex...
Grinder: Gaggia MD85, Dienes Mokka,...
Drip: Behmor Brazen, Abid Clever
Roaster: Behmor 1600+
Posted Sun Apr 28, 2013, 9:23pm
Subject: Re: Commercial lever machine on gas only
 

Different regulators, different line pressure, different burner apertures and air mixing. A pro would need to look at it. Also, somewhere on the machine should be labeled either LP or NG (maybe "NAT").

The regulator on a NG appliance is generally set to deliver the gas at .25 psi, and it will reduce LP pressure to that same level, whereas LP wants to run at .4 psi. There's a lot a differences between the two systems, and an NG system running from a propane tank can be getting weak flame and incomplete combustion.

Frankly, running a gas appliance that hasn't been checked out by a pro to make sure it's running right is a dicey proposition. Take it from someone who's seen a 200 gallon LP tank 30 feet away from a burning building lose its regulator.
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