Wilo TWI 5, Installation And Operating Instructions Manual

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18
WILO AG 10/2006
English
Or by measuring the pressure, delivery valve
closed and compare it to the required one.
In case of reverse sense of rotation, interchange
the two phase wires inside the box or circuit
breaker.
7.2 Operation
CAUTION! Possible damage of the pump
Never allow the pump to run dry or operate with
the shut-off valve closed. The manufacturer’s
guarantee does not cover damage to the pump
caused by dry running.
- Once again check all the electric connections,
electric protection, rating of the fuse(s).
- Measure the current in each phase and compare
with the nominal values mentioned on the
nameplate.
CAUTION! Possible damage of the pump
Do not exceed the nominal current of the motor.
- After being submerged, the pump should be
switched on and off several times to allow it to
be ventilated.
- It is necessary to realize a hole Ø3 in the piping
(see Fig. 3 ) for to improve the air evacuation.
- Measure the power supply voltage with motor
running.
NOTE: See 5.2 for allowed tolerance
8. Maintenance
DANGER! Before any operation, switch off the
pump(s).
- If the sieve is obstructed, the flow rate decreases
significantly, you must carry the pump back, dis-
mantle the cover.
- The repairs on the pump and the modifications
of the electric connection will be realized by a
specialist or a after sales member only.
- It is advisable to mention the nameplate specifi-
cations at the time of a spare parts order.