Appendix en
Installation and operating instructions Wilo-EMU FA + FK 17.1, FK 202, FK 34, FK 42 47
13.3.5 Commissioning
DANGER
Risk of explosion when using non Ex-rated pumps!
Pumps without Ex rating may not be used in potentially explosive areas! There is a
risk of fatal injury due to explosion! Only use pumps which have the appropriate Ex
labelling on the rating plate within potentially explosive areas.
DANGER
Risk of explosion due to flying sparks in the hydraulics!
During operation the hydraulics must be flooded (completely filled with the fluid). If
the volume flow is interrupted or the hydraulics emerges, air cushions can form in
the hydraulics. If this happens, there is a risk of explosion, e.g. flying sparks due to
static charge! Dry-running protection must ensure that the pump is deactivated at
the appropriate level.
DANGER
There is a risk of explosion if dry-running protection is connected incor-
rectly!
If the pump is operated within an explosive atmosphere, the dry-running protection
must have a separate signal transmitter (redundant protection of the level control).
Pump deactivation must be performed with a manual reactivation lock!
▪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 DINEN50495, a safety device with SIL level 1 and hardware fault toler-
ance 0 must be provided for category 2.
13.3.6 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, fulfilling at least a strength
class of 600N/mm².
13.3.6.1 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 2mm!
13.3.6.2 Changing the mechanical seal
Changing the seal on the fluid and motor side is strictly prohibited!
13.3.6.3 Changing the power supply cable
Changing the power supply cable is strictly prohibited!
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