Siemens 6DR55 Series Manual page 51

Figure 24 Favorable and unfavorable installation positions
.
Procedure
SIPART PS2 PA Manual
A5E00127926--05
If conditions oblige you to operate the positioner in a unfavorable
installation position, you can take additional precautionary measures to
prevent penetration by water.
NOTE
Never clean the positioner with a high pressure water jet because the
IP66 degree of protection is inadequate protection for this.
The necessary additional measures to prevent penetration by water
depend on the installation position chosen and you may additionally
require:
screw--type gland with sealing ring (e.g. FESTO: CK --1 / 4--PK--6)
S
plastic hose approx. 20 to 30 cm (e.g. FESTO PUN-- 8X1,25 SW)
S
cable straps (number and length depends on local conditions)
S
Connect the pipes in such a way that rain water which runs along the
S
pipes can drip off before it reaches the terminal strip of the positioner.
Check the electrical connections for perfect firm contact.
S
Check the seal in the housing cover for damage and contamination.
S
Clean and replace if necessary.
Mount the positioner if possible so that the sinter bronze silencer faces
S
downwards on the underside of the housing (vertical installation
position). If this is not possible, the silencer should be replaced by a
suitable screw--type gland with a plastic hose.
Preparing for operation
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