en – Original Instructions
SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
27
6
Maintenance
6.1
Precautions
Before starting the works, make sure that the instructions shown in
on
page 4 have been fully read and understood.
WARNING:
Maintenance must be done by a technician possessing the technical-professional requirements
outlined in the current regulations.
WARNING:
Always wear personal protective equipment.
WARNING:
Always use suitable working tools.
WARNING:
In the case of liquids that are excessively hot or cold, pay attention to the risk of injury.
DANGER: Electrical hazard
Before starting work, check that the power supply is disconnected and locked out, to avoid
unintentional restart of the unit, the electronic drive and the auxiliary control circuit.
DANGER: Electrical hazard
If the unit is connected to the frequency converter, disconnect the mains power supply and
wait at least 10 minutes for the residual current to dissipate.
6.2
Surface unit maintenance
Every 6 months:
1.
Check the integrity of the power supply cord; if the cord is damaged, put the unit out of
service and contact Xylem or the Authorised Distributor for its replacement.
2.
Check the pressure at zero flow rate and compare it with the pressure recorded during first
start up; if the difference between the two values exceeds 10-15%, contact Xylem or the
Authorised distributor.
3.
Carefully clean the unit and the filters.
