EB 8387-5 EN
43
Mounting and start-up
5.9 Pneumatic connections
Risk of fatal injury due to the formation of
an explosive atmosphere.
Operators of the equipment must make sure
that the operating medium cannot create po
-
tentially explosive atmospheres. Only use
gases that are free of substances that could
create a potentially explosive atmosphere if
present in the medium (non-flammable gases
as well as no oxygen or oxygen-enriched
gases).
Risk of injury by possible movement of ex-
posed parts (positioner, actuator or valve)
after connecting the signal pressure.
Do not touch or block exposed moving parts.
Incorrect connection of the supply air will
damage the positioner and will lead to mal
-
function.
Screw the screw fittings into the connecting
plate, pressure gauge mounting block or
connection block from the accessories.
Risk of malfunction due to failure to comply
with required air quality.
Only use supply air that is dry and free of oil
and dust.
Read the maintenance instructions for up-
stream pressure reducing stations.
Blow through all air pipes and hoses thor
-
oughly before connecting them.
5.10 Connecting the supply air
Risk of malfunction due to incorrect sequence
of mounting, installation and start-up.
Keep the following sequence.
1. Remove the protective caps from the
pneumatic connections.
2. Mount the positioner on the valve.
3. Connect the supply air.
4. Connect the electrical power.
5. Perform settings.
The screw fittings with ¼ NPT thread can be
screwed directly into the positioner. In case
G ¼ threaded connections are required, the
fittings must be screwed into the connecting
plate (6) or pressure gauge mounting block
or connection block available from the ac-
cessories.
Customary fittings for metal or copper tubing
or plastic hoses can be used.
Î
Read instructions in section 5.9.
5.10.1 Signal pressure connec
-
tion
The signal pressure connection depends on
how the positioner is mounted onto the actu-
ator:
DANGER
!
WARNING
!
NOTICE
!
NOTICE
!
NOTICE
!
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