Starting Up; Stopping; Precautions; Maintenance And Cleaning - DAB KV 3 Serie Instrucciones Para La Instalación Y El Mantenimiento

9. STARTING UP

In accordance with accident-prevention regulations, the pump must be run only if the coupling (where provided) is suitably protected. So the
pump must be started only after having checked that the coupling protections are correctly fitted.
Do not start the pump unless it has been completely filled with fluid.
Before starting up, check that the pump is properly primed; fill it completely with clean water by means of the hole provided after having removed
the filler cap on the discharge body. This ensures that the mechanical seal is well lubricated and that the pump immediately starts to work regularly.
Fig. F (pag.1) The filler cap must then be put back in place. Dry operation causes irreparable damage to the mechanical seal and the stuffing
box seal.
Fully open the gate valve on intake and keep the one on delivery almost closed.
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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. G,
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pag.1 (indicated also by the arrow on the fan cover). Otherwise invert any two phase leads, after having disconnected the pump from
the mains.
Once the hydraulic circuit has been completely filled with liquid, gradually open the delivery gate valve until its maximum opening.
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With the pump running, check the supply voltage at the motor terminals, which must not differ from the rated value by +/- 5%. (Fig. H,
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pag.1)
With the unit at regular running speed, check that the current absorbed by the motor does not exceed the value on the data plate.
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10. STOPPING

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

The electropump should not be started an excessive number of times in one hour. The maximum admissible value is as follows:
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 Fig. I (pag.1), 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

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 (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.
Procedure for greasing the IP55 version (MEC 160-180): in pumps produced with degree of motor protection IP55 and in which the bearings
greasing system is provided, the grease discharge hole is closed by a brass cap M10x1 situated at an angle of 90° to the grease nipple. Unscrew
and remove the cap M10x1, apply grease to the grease nipple using a suitable grease pump, continuing until clean grease comes out of the
TYPE OF PUMP MAXIMUM NUMBER OF STARTS PER HOUR
KV 3-6-10
KV 32
KV 40 – KV 50
ENGLISH
30
10 ÷ 15
5 ÷ 10
21