Siemens SIRIUS ACT 3SU1 System Manual page 398

3SU19 accessories
13.3 Protection
When mounting the protective cap for selector switches and twin pushbuttons, observe the
mounting location. The mounting location must guarantee that fluids can drain off. The arrow
on the protective cap shows you which way is up.
Figure 13-12 Mounting position of protective cap for selector switches
Figure 13-13 Mounting position of protective cap for twin pushbuttons
On the first appearances of material fatigue, e.g. cracks or yellowing, the protective cap must
be replaced. In this case a hygienic seal can no longer be guaranteed.
Note
The protective caps must be checked at regular intervals. You must not assume that the
operating personnel will watch for damage "on their own initiative".
Cleaning instructions
Type of cleaning, e.g. IPX5 (Protection against water jets from any direction) is possible. The
use of high-pressure jet washers is not permissible.
Accessories such as cloths or sponges are generally permitted, if they do not cause any
damage to the protective cap. Tools such as brushes with stiff bristles are not suitable.
Use the cleaning tools carefully. For example, do not use excessive pressure which could
impair (shift) the proper seating of the cap. Clean carefully, but gently.
398
SIRIUS ACT 3SU1 pushbuttons and signaling devices
System Manual, 08/2018, A5E03457306020A/RS-AK/010