DAB KV 10/2, Instruction For Installation And Maintenance

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ENGLISH
27
9.2 Fully open the gate valve on intake and keep the one on delivery almost closed
9.3 Switch on the power and check that the motor is turning in the right direction, that is clockwise
when viewed from the fan side,
Fig. F (indicated also by the arrow on the fan cover). Otherwise
invert any two phase leads, after having disconnected the pump from the mains.
9.4 Once the hydraulic circuit has been completely filled with liquid, gradually open the delivery gate
valve until its maximum opening.
9.5 With the pump running, check the supply voltage at the motor terminals, which must not differ
from the rated value by +/- 5%
(Fig. G) .
9.6 With the unit at regular running speed, check that the current absorbed by the motor does not
exceed the value on the data plate.
10. STOPPING
10.1 Close the interception device on the delivery pipe. If there is a check device on the delivery pipe,
the interception valve on the delivery side may remain open as long as there is back
For a long period of inactivity, close the interception device on the intake pipe and, if supplied, all
the auxiliary control connections.
11. PRECAUTIONS
11.1 The electropump should not be started an excessive number of times in one hour. The maximum
admissible value is as follows:
TYPE OF PUMP MAXIMUM NUMBER OF STARTS PER HOUR
KVC 30
KV 3-6-10
30
KV 32 10 ÷ 15
KV 40 - KV 50 5 ÷ 10
11.2 DANGER OF FROST: When the pump remains inactive for a long time at temperatures of less
than 0°C, the pump body must be completely emptied through the drain cap (26) Fig. I , to prevent
possible cracking of the hydraulic components. This operation is advisable even in the event of
prolonged inactivity at normal temperature.
Check that the leakage of liquid does not damage persons or
things, especially in plants that use hot water.
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" .
12. MAINTENANCE AND CLEANING
The electropump can only be dismantled by competent skilled personnel, in
possession of the qualifications required by the legislation in force.
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 64 (electropumps with IP55 Degree of motor
protection only).
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.
The legal requirements on the disposal of any harmful fluids must also be
complied with.
12.1 Periodic checks
In normal operation, the pump does not require any kind of maintenance. However, from time to
time it is advisable to check current absorption, the manometric head with the aperture closed and
the maximum flow rate, which will enable you to have advance warning of any faults or wear.
12.2 Greasing the bearings
On some models which are provided with a grease nipple, the motor ball bearings must be greased
every 3000 working hours; this interval may be reduced in the case of heavy duty applications. So
top up with grease for high temperatures, -30 to +140°C, through the grease nipples provided. In
the event of seasonal operation, it is indispensable to apply grease also during the period in which
the machine is not in use.