Electrical Connection; Maintenance - Cosmo CPB Einbau- Und Betriebsanleitung

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7 Electrical connection

1. Plug in the Euro-plug in socket.
2. Activate power supply, where necessary. The pump starts
immediately.
8 Venting
1. Ensure the return line to be air-free.
2. To achieve a noiseless pump run, switch the pump on and
off repeatedly and open a hot water tap several times.

9 Maintenance

DANGER! Electrocution!
Before starting work, disconnect pump from power supply.
WARNING! Danger of scalding!
Before starting work, allow the pump to cool down.
The interior of the pump as well as the rotor may be cleaned
with usual descaling agents. For this purpose the rotor may
be removed from the motor. Close the stop valves before
unscrewing the motor head (see steps 8. and 9. in chapter 6.).
10 Faults and corrective measures
Fault
Pump not
running.
Pump is
making
noise.
If you cannot remedy the fault, contact your local dealer.
16
Causes
ƒ Power supply is inter-
rupted.
ƒ Pump/motor is defective
(electrical/electronics).
ƒ Rotor is blocked by
deposits.
ƒ Rotor is blocked due to
wear of the rotor bearing.
ƒ Air in the pump housing/
pump is running dry.
ƒ Defective rotor bearing.
ƒ Insert of non-return valve
is loose.
Remedies
f Ensure correct power
supply.
f Exchange pump.
f Clean wetted parts.
f Exchange rotor or
pump.
f Bleed the return line.
f Exchange rotor. Ex-
change the pump, if the
bearing pin is damaged.
f Exchange non-return
valve.