Breville Oracle Instruction Book page 35

2. Empty Boilers
a) Remove the grey silicone cover
on the lower front panel marked
DESCALE ACCESS.
REMOVE
b) Place a cloth over the drip tray to prevent
steam escaping.
c) Use a flat head screw driver to rotate the
right valve counter-clockwise SLOWLY
until fully open. As the valve opens,
steam may be released.
NOTE
If there's no water released into the drip tray,
press and hold the 1 CUP button for 3 seconds.
This will release water from the boiler.
When the water is completely empty, close
the valve by rotating screws clock-wise until
seated. Do not overtighten screws to avoid
damages to the valves.
d) Repeat the above process on the
left valve.
e) Empty the drip tray, use caution as the
drip tray may be hot.
f) Empty water tank, remove water filter.
g) Place descale solution into water tank, fill
with cold water to MAX line,
(if an alternative cleaning solution is
used, please follow the manufacturer's
instructions accordingly). Lock water
tank back into position at the back of the
machine.
NOTE
If water tank has not been removed, replaced or
is empty, "FILL TANK" will appear on the LCD.
3. Begin Descale
a) Press 1 Cup button and the LCD screen
will show countdown time (20 minutes).
During this time, the machine will fill boilers
with descale solution and heat to temperature.
There may be some water flow through
the group head during this time. Allow the
countdown timer to reach 0 as this allows
solution sufficient time to dissolve scale build
up. However you can proceed to the next step
at any time by pressing the 1 Cup button.
b) Place a cloth over the drip tray to stop
steam escaping.
c) Empty boilers by repeating steps
2c and 2d.
d) Empty drip tray and insert back to place.
e) Empty water tank then rinse and fill with
clean water to the MAX line. Lock water
tank back into position.
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