en
Appendix
242
WILO SE 2018-05
▪ The operator is responsible for defining the potentially explosive area.
▪ Only pumps with corresponding Ex rating may be used within a potentially explosive
area.
▪ Pumps with Ex rating must be labelled on the rating plate.
▪ Do not exceed the
maximum fluid temperature
!
▪ Dry running of the pump must be prevented! Ensure on-site (dry-running protection)
that emerging of the hydraulics is prevented.
According to DIN EN 50495, a safety device with SIL level 1 and hardware fault toler-
ance 0 must be provided for category 2.
13.1.6
Maintenance and repair
▪ Carry out maintenance tasks according to the regulations.
▪ Only carry out maintenance tasks mentioned in these installation and operating in-
structions.
▪ The spark-proof gaps may
only
be repaired according to the manufacturer’s design
specifications. It is
not
permitted to carry out repairs according to the values in tables 1
and 2 of DIN EN 60079-1.
▪ Only use screw plugs as stipulated by the manufacturer, that at least correspond to a
strength class of 600 N/mm² (38.85 long tons-force/inch²).
13.1.6.1 Repair of housing coating
The paint layer can become electrostatically charged in case of thicker
coats.
DANGER! Risk of explosion! In explosive atmospheres, a discharge can cause
an explosion!
If the housing coating has to be repaired, the maximum coat thickness is 2 mm
(0.08 in)!
13.1.6.2 Changing the mechanical seal
Changing the seal on the fluid and motor side is strictly prohibited!
13.1.6.3 Changing the power supply cable
Changing the power supply cable is strictly prohibited!