Can changing group pressure effect the steam ?

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SimonSoCal
Cappuccino
Posts: 25
Joined: Tue Jan 05, 2010 6:46 pm

Can changing group pressure effect the steam ?

Post by SimonSoCal » Sun Aug 08, 2010 12:25 pm

I recently re adjusted the group pressure to closer 8.5bar (before was gotten to 9.5bar b/c of the flex from inline water pressure). But I also started to noticed when ever I turn the knob to steam within few seconds the light started to blink. This happen when I waited all the lights are stable before I start to froth. The bar on the gauge (the right side) is always on green , Somewhere from 1- 1,2bar.

Honestly I never noticed it before because I was too busy to get the frothing just right. Now I gotten few practices and able to re direct my eyes to view few more things/gauges, I begin to refine my skills and parameters.

Thx I advance.

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slo
Barista
Posts: 417
Joined: Mon Aug 31, 2009 6:51 pm
Location: Montreal, Canada

Re: Can changing group pressure effect the steam ?

Post by slo » Sun Aug 08, 2010 6:35 pm

The light starts to blink because the boiler heater is active. The pressure is going down and the "computer" wants to heat the water to raise the pressure back.

The pump pressure should not affect the steam boiler lights or performance. Whatever the pump pressure setting the pressure is brought down by a gicleur (restrictor) before it reaches the steam boiler where the pressure is much lower.

Hope this answers your question.
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