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Date: 30 Jan 2007 21:52:54
From:
Subject: Silvia steam thermostat bypass
I just finished installing a steam-knob actuated microswitch to bypass
the steam thermostat on my Silvia. This was a pretty simple install-
it uses the retaining spring and flat of the knob shaft as the cam,
rather than a separate assembly, and is adjustable to accomodate both
the difference in closing position for the valve when hot, and any
possible future wear to the valve. Now whenever the steam switch is on
and the valve is opened, the boiler kicks on regardless of
temperature.

http://www.bitsisbits.com/silvia/AUT_6803.JPG
http://www.bitsisbits.com/silvia/AUT_6806.JPG
http://www.bitsisbits.com/silvia/AUT_6808.JPG
http://www.bitsisbits.com/silvia/AUT_6811.JPG

The hose clamp is just snug enough to hold the bracket in position
without compressing the brass valve body. For under $4 in parts (and
20 minutes with a sheet metal nibbler to fab the bracket), it's a
shame they don't come this way from the factory...





 
Date: 07 Feb 2007 03:34:57
From: daveb
Subject: Re: Silvia steam thermostat bypass
On Tue, 30 Jan 2007 23:01:09 -0800, in message
1170226869.650816.302550@l53g2000cwa.googlegroups.com daveb wrote:

You mean the PUMP comes on?

and why? the wimpy heating element on the silvia does not deal well
with water arriving AND the steam valve open. The Saeco design with
its teensy boiler and hefty element works better with the switch
setup, that's stock with that design.

dave


 
Date: 02 Feb 2007 08:17:32
From:
Subject: Re: Silvia steam thermostat bypass
On Jan 31, 8:07 am, hazzmat
<hazz...@unitedstatesgovernmentbellsouth.net > wrote:

> I don't think that's what it does. It just keeps the boiler "on" if the
> steam switch is on and the steam knob is opened. It turns the heater back
> on or keeps it on regardless of what the steam thermostat thinks should
> happen, if those two conditions are true.
>
> If someone waits for the boiler light to go out before steaming their
> milk, and then twists the steam valve open, the steam knob's shaft
> completes a circuit which bypasses the steam thermostat and turns the
> boiler element back on while they let steam out. That prevents the steam
> from declining rapidly the way it will if the boiler is off.

That's it exactly- sorry if I didn't make myself clear.

Steve




 
Date: 31 Jan 2007 09:53:59
From:
Subject: Re: Silvia steam thermostat bypass
>
> Nice work. Care to share the spec's on the switch here?
>
> Jim

Sure- it's a 277VAC 10A long-arm microswitch, nothing fancy, but
should be up to the job.

I gotta say it was pretty exciting getting it adjusted with my
knuckles next to the hot boiler- since the closed valve position, and
thus the cam position, varies when the valve is hot vs. cold, it had
to be nice and hot during installation.

Steve



 
Date: 31 Jan 2007 12:17:27
From: jggall01
Subject: Re: Silvia steam thermostat bypass
On 30 Jan 2007 21:52:54 -0800, sendspamhere@yahoo.com wrote:

>I just finished installing a steam-knob actuated microswitch to bypass
>the steam thermostat on my Silvia. This was a pretty simple install-
>it uses the retaining spring and flat of the knob shaft as the cam,
>rather than a separate assembly, and is adjustable to accomodate both
>the difference in closing position for the valve when hot, and any
>possible future wear to the valve. Now whenever the steam switch is on
>and the valve is opened, the boiler kicks on regardless of
>temperature.
>
>http://www.bitsisbits.com/silvia/AUT_6803.JPG
>http://www.bitsisbits.com/silvia/AUT_6806.JPG
>http://www.bitsisbits.com/silvia/AUT_6808.JPG
>http://www.bitsisbits.com/silvia/AUT_6811.JPG
>
>The hose clamp is just snug enough to hold the bracket in position
>without compressing the brass valve body. For under $4 in parts (and
>20 minutes with a sheet metal nibbler to fab the bracket), it's a
>shame they don't come this way from the factory...

Nice work. Care to share the spec's on the switch here?

Jim

--
Posted via a free Usenet account from http://www.teranews.com



 
Date: 30 Jan 2007 23:01:09
From: daveb
Subject: Re: Silvia steam thermostat bypass

On Jan 31, 12:52 am, sendspamh...@yahoo.com wrote:
> I just finished installing a steam-knob actuated microswitch to bypass
> the steam thermostat on my Silvia. This was a pretty simple install-
> it uses the retaining spring and flat of the knob shaft as the cam,
> rather than a separate assembly, and is adjustable to accomodate both
> the difference in closing position for the valve when hot, and any
> possible future wear to the valve. Now whenever the steam switch is on
> and the valve is opened, the boiler kicks on regardless of
> temperature.
>
> http://www.bitsisbits.com/silvia/AUT_6803.JPGhttp://www.bitsisbits.com/silvia/AUT_6806.JPGhttp://www.bitsisbits.com/silvia/AUT_6808.JPGhttp://www.bitsisbits.com/silvia/AUT_6811.JPG
>
> The hose clamp is just snug enough to hold the bracket in position
> without compressing the brass valve body. For under $4 in parts (and
> 20 minutes with a sheet metal nibbler to fab the bracket), it's a
> shame they don't come this way from the factory...


You mean the PUMP comes on?

and why? the wimpy heating element on the silvia does not deal well
with water arriving AND the steam valve open. The Saeco design with
its teensy boiler and hefty element works better with the switch
setup, that's stock with that design.

dave
www.hitechespresso.com




  
Date: 31 Jan 2007 07:51:29
From: mattw
Subject: Re: Problems with my new expobar office lever?
I think you may want to try better coffee, but you should be able to
make okay shots

>"golden
> rule" shot, 2.0 - 2.5oz. in 20 to 25 seconds.

This 'rule', like most rules, is meant to be broken - you want to stop
the shot when you see some blonding (when the crema shifts from nice
and dark to a whitish-blonde color). If you are stopping right at or
before the blonding point then it may be something different, try that
first, though.

On your cooling flush - you aren't trying to run a 'shot' necessarily,
you want to run the water until it stops bubbling (the bubbling
indicates it is flash boiling as it comes out). May be more than a
shot, may be less.

I had an expobar pulser and they can definitely pull some good shots.

/mw