Preventive Maintenance Inspections; Oil And Grease Inspection And Change - caprari K.M150R Serie Betriebs- Und Wartungsanleitung

K.M150R.. / K.250... / K.D300... / K.D350...
20.2. ELECTRIC PUMPS WITH CONDUCTIVITY PROBES
ATTENTION The conductivity probe is either installed in the oil chamber (for -E versions) or in the electric motor (for -...X... versions) and detects
water infiltrations . If the electric panel is equipped with a conductivity detector, this will activate when the electric resistance is less than 30 kΩ owing
to the presence of water. In order to detect conductivity, the terminal marked "15" and a shunt of the Yellow / Green earth terminal must be connected
to the device.
The conductivity detector is generally used to close an alarm circuit if water is detected in the oil chamber or motor. The alarm circuit can either have
lights and/or be acoustic. For explosion-proof pumps, the specifications of the device must be compatible with the classification of the area liable to
GB
the risk of explosion.
In flameproof electric pumps used in areas where use of this sort of type-approved electric pump is explicitly required,
it is forbidden to use the conductivity probe in the oil; the probe is installed in the motor casing.

21. PREVENTIVE MAINTENANCE INSPECTIONS

To ensure regular pump operation and long life, the purchaser must ensure that regular inspections and periodic maintenance operations are carried
out, with replacement of any worn parts. It is advisable to carry out the below listed preventive inspections at least once 6 month, or after every 1500
hours service:
- check that the power supply voltage is within the established values;
- check that the noise and vibration levels are unchanged, in relation to optimum first start-up conditions;
- using an amperometric clamp, check that the power drawn on the three phases are balanced and that they do not exceed the data plate values;
- check the motor insulation: detach the power cable from the panel and connect the joined cable terminals and the ground cable to the terminals of a
500 V.d.c. ohmmeter. The insulation resistance (motor-cable) must not be less than 5MΩ. Failing this, pull out the unit and overhaul (a cable will need
replacing or the motor must be repaired). Further inspections for electric pumps equipped with the following devices:
- check the oil conductivity which must be >30KΩ, if the electric panel is without the relative warning light;
- check the specific warning light to see whether the thermal probes of the motor have activated.
Ask Caprari SpA for their "Periodic inspections and preventive maintenance" publication, series "K" , for more detailed and scheduled maintenance work.

22. OIL AND GREASE INSPECTION AND CHANGE

In normal conditions of work, the oil must be changed every 9000 hours and every 3000 hours in heavy duty situations. Used the oils listed below or
similar ones .
Use the relative outlets with 1/2" Gas plugs for the emptying and filling operations.
The opening marked "OIL OUT" is used to empty the oil. Set the machine in a horizontal position or use an oil suction device to completely drain off the oil.
If the old oil is like an emulsion, pour in new oil and check the seal on the pump side.
If there is water in the drained oil, change the mechanical seal on the pump side. The mechanical seal on the motor side should only be replaced if
damaged or if there is fluid in the motor compartment.
The opening marked "OIL IN" is used for filling.
Comply with the quantities indicated below to maintain the correct oil level:
Electric pump type
P
N° Poles
2
[kW]
4
≤ 62
≤ 6
51
8
≤ 42
4
> 62
6
>
51
8
> 42
To correctly fill, it is very important to comply with the indicated oil quantity.
The oil reservoir has been designed to ensure an adequate air cushion.
Once the emptying/filling operations have completed, check that all plugs have been well tightened and are complete with their respective new copper
seals. If the oil has been changed, do not throw the old oil away.
Give it to those companies authorized for oil disposal (apply to the relative COBAT Authorized Consortia in Italy).
In case the lower mechanical seal undergoes a failure, an oil emission in the pumping fluid may happen.The safety card
concerning the oils used by Caprari can be required directly to Caprari S.p.A.The oil filling provided of F.D.A. certification can
be even asked to Caprari S.p.A.
30
Oil type Quantity in [kg]
ISO32 - SAE10W
4
ARNICA 32 - Agip
DTE 24 - Mobil
NUTO H32 - Esso
TELLUS S 37 - Shell
or analogous
6,5
Quantity in [l]
4,5
7,5
Caprari S.p.A.