Operation Manual

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2 If you equipped your machine with an in-reservoir water softener, remove it from the intake hose and place
it aside until this process is completed. The descaling agent can damage the water softener if it is left in place
during this process and can damage the espresso machine as well! Do not reinstall the water softener until
this entire procedure is completed.
3 The original particle filter which came with the machine that fits onto the end of the hose must be installed.
The original particle filter will stop any foreign matter from entering the machine.
5 Premix the descaling solution according to the manufacturer’s recommendations. You will need a total of
about 3 quarts (3 liters) of solution. If you are using a powdered descaler, heat one-half the amount of water
the instructions of the product call for, mix the powder in that water and allow to dissolve, then add cold
water to bring the total volume to the correct level.
CAUTION: The pump is not designed to pump hot water.
6 Carefully pour the de-scaling agent into the DD’s reservoir, filling it to about 1/2” (2cm) from the top.
CAUTION: Do not allow the descaling solution to drip or splash into the machine.
7 Turn the power switch to “Position I” and allow the machine to reach operating temperature.
8 Remove the drip tray cover and if necessary, empty the drip tray. Replace the drip tray.
9 Place a large, heat-resistant container under the group, such as a large measuring cup of heat-resistant glass
(we will refer to this as the “vessel” from this point on). Lift the brewing lever to the brew position and pump
16 ounces (0.5 liters) of solution through the machine and into the vessel. Discard the dispensed water. As
you move through these steps, do not allow the reservoir to become empty.
WARNING: In many of these steps, such as when pumping the de-scaler through the brewhead and
removing the hoses from the water reservoir, splashing acid can create a safety hazard. Gloves, eye
protection, and protection for the working surface are required.
4 FOR PLUMBED MACHINES ONLY - If you have been supplying the DD with water using
the plumbed option, access the lever on the bottom of the machine and turn it to face the hot water
wand’s side of the machine (pointing to the right when you are facing the front of the machine).
Remove the reservoir and remove the screw in the center of the reservoir’s platform. Place the
reservoir on the platform and push down on it and release it. It should click when pushed down and
click once again when released. Removing this screw prevents the machine from running with an
empty reservoir which can damage the pump or other components.
CAUTION: Running the machine without an ample water supply can damage the pump and
other parts. Damage from insufficient water is not covered by the warranty.
Priming the Pump.
A Rotary pumps were not originally designed to draw water in from a reservoir. Because of that, it
is a good idea to prime the pump at this time to be sure that it will correctly draw water from the
reservoir. It is not always necessary to do this, but it insures that the pump is protected from running
without water.
A Lift the hose out of the reservoir and remove the filter from the end of the hose.
B Hold the hose straight up and using a suitable tool (turkey baster, syringe, or small funnel for ex-
ample) completely fill the hose with water.
C While still holding the filled hose upwards in one hand, turn the power switch to “Position I” and
lift the brew lever all the way. Almost immediately, the water in the hose should be drawn into the
pump. As soon as the water level in the hose begins to recede, immediately lower the brew lever
fully and turn the power switch to “Position 0.”
D Replace the filter on the end of the hose and drop it into the reservoir