Xylem Lowara ESH Serie Installations- Betriebs Und Wartungshandbuch Seite 32

en - Original instructions
rotates in the wrong direction
Cause
There is a leakage in
one or both of the
following components:
•
The suction pipe.
•
The foot valve or
the check valve.
There is air in the
suction pipe.
7.10 The pump starts up too
frequently
Cause
There is a leakage in
one or both of the
following components:
•
The suction pipe.
•
The foot valve or
the check valve.
There is a ruptured
membrane or no air
pre-charge in the
pressure tank.
7.11 The pump generates too
much noise
Cause Solution
Reduce the required flow rate
Pump
by partially closing the on-off
cavitation
valve downstream from the
pump. If the problem persists
check the operating conditions
of the pump (for example
height difference, flow
resistance, liquid temperature).
The motor Contact Xylem or the
bearings are Authorised Distributor.
worn.
There are
Contact Xylem or the
foreign
Authorised Distributor.
objects
inside the
pump
Impeller rubs
Contact Xylem or the
on the wear
Authorised Distributor.
ring
Coupling Check the coupling
misaligned alignment.
Flexible Contact Xylem or the
elements of Authorised Distributor.
the coupling
worn
Contact Xylem or the Authorised Distributor
with regard to any situations not covered here.
32
Solution
Repair or replace
the faulty
component.
Bleed the system.
Solution
Repair or replace
the faulty
component.
See the relevant
instructions in the
pressure tank
manual.