EB 8546 EN
21
Pneumatic connections
4.3.3 Operating the manual/
automatic switchover
unit
In normal operation, the manual/automatic
switchover runs in automatic mode, during
which the positioner supplies air to the pneu
-
matic actuator.
Fig. 16:
Cap and switchover pin
To switch to manual mode, twist off the plas
-
tic cap. Turn the switchover pin counterclock
-
wise and pull it (approx. 1 cm) out of the
bayonet lock.
The compressed air is then routed directly
from the supply pressure regulator or from
the air supply network to the pneumatic ac
-
tuator.
To switch back to automatic mode, push in
the switchover pin again. To do this, insert
the lock pin completely into the bayonet and
lock it.
Replace plastic cap and tighten.
4.4
Filter with filter receptacle
The Types 4708-83, -84, -86 and -87 Air
Filters are designed for universal use. They
have either G ¼ or ¼-18 NPT threaded con-
nection.
Fig. 17:
Types 4708-83 Air Filter
4.4.1
Mounting the air filter
Mount the air filter directly into the pipeline,
while ensuring the direction of flow (printed
on the device) is kept.
Î
The filter receptacle must face down-
wards to function correctly.
Содержание Type 4708
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