La Marzocco GS/3 Owner's Manual page 12

3. Dispensing Steam.
In order to allow for any condensed water
in the wand to be released ALWAYS allow
some steam to be discharged by turning
on the valve before inserting the steam
wand into the pitcher of liquid to be
heated.
Dip the steam wand into the liquid to be
heated. Depress the steam valve lever to
activate the steaming process.
The steam valve has a variable flow
control. The steam valve will lock in the
fully on position only.
The steam will transfer heat to the liquid
raising its temperature. Be careful not to
allow liquid to overflow in order to avoid
severe burns.
Steaming milk for cappuccinos and
other beverages is very easy but making
it just right requires some skill. Please
experiment with various techniques to
find the best method for your milk. You
can find many discussions about the
steaming of milk on the internet.
NOTE: It is important to have a sufficient
volume of liquid in the steaming pitcher.
Therefore if you intend to steam small
amounts of milk it is necessary to use a
small pitcher. If you intend to steam larger
quantities of milk then it is necessary to
use a larger steaming pitcher.
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Using too little milk in a steaming pitcher
can allow the milk to be "blown out" of
the pitcher. A good rule to follow is to
fill the steaming pitcher only half full of
liquid.
NOTE: In order to prevent the heated
liquid from being sucked back into the
steam boiler it is recommended that you
purge the steam system after heating any
liquid.
Purge the system by opening the steam
valve for a few seconds to allow steam to
escape to the atmosphere from the end
of the steam wand. Failure to do so can
cause the heated liquid to transfer from
the steaming pitcher to the steam boiler
(via vacuum created from cooling parts).
This condition is undesireable and can
cause contamination in the steam boiler.
4. Dispensing Hot Water.
You may dispense hot water by using the
hot water nozzle. To dispense hot water
press the hot water button.
Figure 9 - Hot Water Button
This button commands the hot water
delivery. The volume of water delivered
may be adjusted via the display (see
the Software Programming Manual for
further instructions). The temperature of
the water dispensed may be adjusted by
adjusting the mixing valve under the right
side cover of the espresso machine (see
machine description diagram, Figure 2,
and the instructions on the next page).
WARNING
THE COFFEE BOILER AND STEAM BOILER
CONTAIN WATER AT ELEVATED TEMPERATU-
RE. WATER TEMPERATURE OVER 125°F/52°C
CAN CAUSE SEVERE BURNS INSTANTLY OR
DEATH FROM SCALDING (COFFEE BOILER
200°F/93.3°C-STEAM BOILER 260°F /127°C)
WARNING
THIS MACHINE IS NOT SUITABLE FOR OUTDO-
OR USE. jETS OF WATER SHOULD NOT BE
USED TO CLEAN THE MACHINE, NOR SHOULD
IT BE PLACED WHERE WATER
jETS ARE USED.