22
English
8 Venting
1.
Ensure the DHW return pipe to be air-free (see chapter
6, point 8).
2.
Switch the pump on and off and open the hot water tap
several times until it is running without any noise.
9 Maintenance
DANGER!
Electrocution!
Before starting any activity, disconnect the pump from the
power supply.
WARNING! Danger of scalding!
Before starting any activity, let the pump cool down.
The inside of the pump and the rotor may be cleaned with
standard descaling products. For this purpose the rotor
may be removed from the motor. Shut the isolation valves
before taking the pump head off (see chapter 6).
10 Troubleshooting
Fault
Causes
Remedies
Pump not
running.
No power supply.
Pump/motor is faulty
(electrical/elec-
tronics).
Rotor is seized by
deposits.
Rotor is seized due
to wear of the rotor
bearing.
f
Ensure correct power
supply.
f
Replace the pump.
f
Clean/clear the
inside of the pump.
f
Replace the pump.
Pump is
noisy.
Air in the pump
housing/pump is
running dry.
Faulty rotor bearing.
The insert in the non-
return valve is loose.
f
Bleed the pump and
the return pipe and
fill/prime it correctly.
f
Replace the pump.
f
Replace the
non-return valve.
If you cannot solve the fault, contact your local dealer.
Summary of Contents for Evosta2 11/139 SAN V
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