Dos Venting - Miele PG 8581 Supplementary Document

3.4. DOS Venting

Note: Instruments are NOT to be processed during
DOS venting.
The dispensing system for liquid chemical agents can only
dispense reliably if the system has been purged of air.
The DOS system must be vented:
• if the dispensing system is being used for the first time
• if the liquid cleaning agent container was not refilled or
replaced in time and the DOS system was sucked dry
(giving F518 or F519).
Before venting, ensure that the liquid chemical agent
container is sufficiently full and the siphons are securely
screwed to the containers. Push the suction tub/float down
towards the bottom of the container. Only one DOS system
can be vented at a time.
Open the menu as follows:
button
Settings
DOS venting
DOS...(name of dispensing system)
Automatic venting will start when the dispensing system is
selected. Once started, the automatic venting process can no
longer be cancelled.
Select a dispensing system using the UP and DOWN buttons
∧ ∨
( ).
Press OK to start the venting process.
Automatic venting is successfully completed when the
following message appears in the display:
If the DOS3 system is vented, it is important to run at least
one rinse cycle, otherwise foaming will occur.
12
Refilling
neutralising agent
Checking
consumption
must be filled and the dispensing system

Place the neutralising agent container
cabinet door or on a surface which is

Detergent dispensed via dosing system
Unscrew and remove the siphon. Plac
DOS 1 - Marked blue
Liquid detergent is dispensed from a 5 litre container via cabinet door.
the dosing system (DOS 1). The cap or lines on the tubing

are marked in blue. The 5 litre container is connected to the
Replace the empty container with a fu
machine by screwing on the blue marked suction tube.

Push the siphon into the opening of th
Once fitted ensure the tube is pushed to the bottom of the
container. When the container is nearly empty the screen
on tightly. Observe the colour coding.
will display 'DOS refill' and it is time to replace it with a new

container to the blue suction tube.
Wipe up any spilled process chemical
If the chemical is renewed immediately there is no need

to vent, but if delayed for more than one cycle venting
Place the container on the floor next to
becomes necessary.
Place the container on the floor next to the machine or in an adjacent cupboard. Make sure that the
adjacent cupboard. Make sure that the dispensing hose is
kinked or trapped.
not kinked or trapped.

Vent the dispensing system as necessary.
Vent the dispensing system as necess
DOS").
Check consumption regularly by checki
containers and replace containers in go
dispensing system being sucked compl
MUW216743-2