Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999157 / 10/12/2009
page 21 of 31
➨
Use a Torx screw driver TX 20 to remove the 4 securing
screws of the cover hood.
➨
Put device back to normal operating position.
➨
Use a hex key size 2.5 to remove the top 4 securing screws
(see small figure) of the cover hood on the rear side.
➨
Remove cover hood carefully upwards.
☞
Do not cant the cover at the ducts of the quick coupling or
the adjusting knob.
Cleaning and inspecting the pump head
➨
Switch device off and unplug mains cable.
➨
Uncouple hose between collecting bottle and pump at the
quick coupling. Remove bottle from its holder.
BVC 21 NT VARIO
:
➨
Remove adjusting knob of vacuum control carefully.
➨
Tilt device carefully onto the left side.
remove
adjusting
knob
BVC 21 NT VARIO
:
➨
Loosen the two socket head screws holding the variable
speed drive slightly (half a turn).
☞
Attention:
Don’t undo the socket head screws completely
on any account!
➨
Move the variable speed drive in the slots of the base plate
to the back until the axis of the adjusting knob has disap-
peared completely inside the cover hood.
➨
Tighten the two socket head screws again.
➨
Undo hose connections to the pump head in three plac-
es.
➨
Remove transparent PVC hoses (2x) from the hose con-
nectors (1)+(2).
➨
Open the clip at the connection of the PTFE tubing at the
quick coupling (3) with a flat bladed screw driver. Remove
PTFE tubing from hose connector.
Removing cover hood from base plate
➨
1
3
2
