Actuating The Valve Mechanically - Burkert 3320 Manuel D'utilisation

Type 3320, 3321
Manual override of valve
12.2

Actuating the valve mechanically

If there is no supply voltage, e.g. during installation or in the
event of a power failure, the valve can be opened or closed using
the mechanical manual override.
NOTE!
The mechanical manual override may be used only when
it is de-energised, otherwise the device may be damaged.
Devices with ATEX or IECEx approval
The devices are secured with a special cover. The removal
of the cover is described in the supplementary instructions
for the electromotive valves with ATEX approval and IECEx
approval.
→ To unlock the blind cover, turn it counterclockwise and
remove.
Fig. 24: Remove blind cover
→ To adjust the valve, use an Allen key with 3 mm AF.
Unlock blind cover
NOTE!
Maximum torque 2 Nm.
Exceeding this torque value upon reaching the end position
of the valve may damage the mechanical override mechanism.
The position indicator shows that the valve end positions have
been reached (see "Fig. 25").
→ Apply light pressure to lock the mechanical manual override
mechanism into place while turning the Allen key at the same
time (see "Fig. 26").
Mechanical position
indicator
Valve closed
Fig. 25: Mechanical position indicator
English
Valve opened
39