ENGLISH
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8.2 Stopping
If hot water is to be pumped, arrange that the pump can be stopped only after having excluded the source of heat and let sufficient time
elapse to allow the liquid temperature to drop to acceptable values, so as not to create excessive temperature increases inside the pump
body.
For a long period of inactivity, close the interception device on the intake pipe and, if supplied, all the auxiliary control connections. To
guarantee maximum system functionality it will be necessary to arrange for brief running periods (5 - 10 min) at intervals of 1 to 3 months.
If the pump is removed from the system and stored, proceed as indicated in par 4.1
9.
PRECAUTIONS
The electric pump must not be subjected to an excessive number of starts per hour. The maximum permissible number is as follows:
Maximum number of starts/hour
Three-phase motors up to 4 kW
20 ÷ 30
Three-phase motors from 5.5 to 44 Kw
5 ÷ 10
9.1 Danger of frost
Do not close the drainage cap until the pump is to be used again.
When restarting after long periods of inactivity it is necessary to repeat the operations described above in the paragraphs “WARNINGS” and
“STARTING UP”.
10.
MAINTENANCE AND CLEANING
In any case, all repair and maintenance jobs must be carried out only after having disconnected the pump from the power mains. Ensure
that it cannot be switched on accidentally. If possible, keep to a maintenance schedule: expensive repairs or machine down times can be
avoided with a minimum expense. During maintenance schedule discharge the condensate, if necessary present into the motor, through
the hole, removing the exhaust port plug no (electropumps with IP55 Degree of motor protection only).
The legal requirements on the disposal of any harmful fluids must also be complied with.
In normal operation, the pump does not require any kind of maintenance. However, from time to time it is advisable to check the plate data,
which will enable you to have advance warning of any faults or wear.
After any operation involving the removal of the motor head from the pump body, it is advisable to change the O-ring between the
pump body and the support.
10.1 Shaft adjustment
If the motor has been removed during installation or for repair of the pump, the pump shaft must be adjusted after reassembling the motor.
10.1.1 Shaft adjustment for pumps with two-part coupling
Ensure that the shaft pin is fitted into the pump shaft. Adjust the pump shaft as follows:
1. Remove the coupling cover grids with a screwdriver.
2. Secure the hexagon socket screw inside the coupling and do not tighten it.
3. Lift the coupling and pump shaft (towards the motor) as high as possible with a screwdriver or similar tool, so that the pump and the motor
shafts come into contact.
4. Secure the hexagon socket screw inside the coupling to 5 Nm (0.5 kpm).
5. Check that the gaps on both sides of the coupling are identical.
6. Tighten the screws two at a time (one side at a time) to the torque indicated below.
Check that the leakage of liquid does not damage persons or things, especially in plants that use hot water. The
system must be drained only once the fluid temperature has reached environment temperature.
The electropump can only be dismantled by competent skilled personnel, in possession of the qualifications
required by the legislation in force.
If the liquid has to be drained out maintenance, ensure that the liquid coming out cannot harm persons or things,
especially in using hot water.
