Chris Coffee Service Vetrano Manual do Proprietário - Página 11
Procurar online ou descarregar pdf Manual do Proprietário para Máquina de café Chris Coffee Service Vetrano. Chris Coffee Service Vetrano 17 páginas. Espresso machine
Imprimir páginaExpansion Valve Adjustment
Warning: This adjustment requires removing the shell and making an adjustment with the machine
plugged in so it is very important to exercise extreme caution. Failure to do so may cause injury, and
or electrical shock. Chris' Coffee Service and it's distributors assume no liabilty for failure to follow
this warning.
The expansion valve is used to allow for the expansion of heated water in the heat exchange.
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This water is discharged into the drip tray via a black plastic spout. During heat up it is normal for
the black plastic spout to discharge some steam and hot water into the drip tray.
Before making an adjustment the machine should be
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up to operating temperature.
After the machine is up to temperature follow the
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instructions for setting the pump pressure and raise
the pump pressure to 12.5 bar.
Install the backflush disc into the portafilter and then
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lock the portafilter into the group head.
Remove the drip tray cover and then raise the brew
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lever. Use a 12mm or adjustable wrench to adjust
the expansion valve adjustment nut.
With the pump running adjust the expansion valve so
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the black plastic spout in the drip tray just starts to
drip. Turning clockwise will slow the drip, counter
clockwise to increase.
Be sure the attached silicone hose does not get
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twisted, straighten out if necessary.
After adjusting the expansion valve then adjust the pump pressure back down to 9 bar.
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Note: If the expansion valve continues to drip at 9 bar after adjustment then the rubber seat inside
the valve should be replaced. A replacement seat can be ordered from our website below.
http://www.chriscoffee.com/products/home/parts/expansionvalveseat
Vetrano
Chris' Coffee Service Inc.
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