DB-309-3
20
5.3
Oil level switch
with Reed contact. The oil level switch (see chapter
Mounting, page 16, "Simple electrical equipment")
monitors the minimum oil level and cuts the power sup-
ply of the oil heater in case of lack of oil.
• Incorporate the oil level switch into the intrinsically
safe circuit according to the schematic wiring dia-
gram.
• Make sure that the heater is always covered with oil!
DANGER
Risk of explosion due to an incorrectly connec-
ted oil level switch and lack of oil!
Only use an oil level switch which is suitable for
the use in a potentially explosive atmosphere
and connect it together with the section switch
amplifier!
5.4
Earthing
All conductive components, including the pipelines,
must be connected to the equipotential bonding.
DANGER
Risk of explosion due to the discharge of elec-
trostatic charges!
Use only devices suitable for potentially explos-
ive atmospheres and assess and list them in the
explosion protection document of the end user!
Do not operate the devices in the vicinity of pro-
cesses producing high charges (e.g. mechanical
separation processes)!
Take measures against electrostatic charging of
non-metallic components, tools, auxiliaries and
clothing!
Wear, for example, suitable antistatic clothing,
use low-sparking tools, a moist cloth for clean-
ing, and perform additional earthing of conduct-
ive parts.
6
Commissioning
Observe the manufacturer’s documentation of the com-
ponents used!
Filling in oil and checking the tightness, see DB-300
Preparing a data protocol with all operating data
see DB-300 chapter “Check operating data”.
Observe the manufacturer’s documentation of the com-
ponents used!
