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16
18
17
Attention! During assembly, fit all the O-rings correctly, without damaging them.
OLD OIL MUST BE DISPOSED OF AS REQUIRED BY THE REGULATIONS IN FORCE.
10. TROUBLESHOOTING
FAULT
1. The motor does not start and
makes no noise.
2. The pump does not deliver.
3. The pump does not stop.
4. The flow is insufficient.
5. The thermal overload
protection stops the pump.
Checking and changing the sealing oil DRENAG 1000-1200
64
To perform this operation you must unscrew the six screws of the flange (45) so as to be able
to remove the flange (105) and the outer jacket (77). Unscrew the three screws of the filter
cover (136) and remove the cover (92) and the filter (42). Unscrew the four screws of the
pump body (52) and remove the pump body (1). Using a suitable wrench, unscrew the nut
(18) that blocks the impeller, holding the impeller (4) still with your hand. Remove the impeller
(4), if necessary with the aid of levers. Recover the tab (17) and the sand protection ring (15),
unscrew and remove the cap (64). Tilt the pump so as to drain the oil out of the hole of the
cap (64) and pour it into a container. Analyse the oil: if you find any particles of water or
abrasive materials (for example, sand) it is advisable to check the condition of the mechanical
seal (16) and to have it changed if necessary (at a specialized centre). In this case change
the oil too, with about 170 gr of oil type MARCOL 152 ESSO.
15
Top up the oil level inside the sealing oil chamber using a special funnel inserted in the hole
92
in the cap (64). Screw the drainage cap (64) back on and perform the disassembly
operations in inverse order to reassemble the pump after having spread a suitable amount of
Fig.7
teflon grease in the seat of the sand guard (15).
CHECK (possible cause)
A. Check that the motor is live.
B. Check the protection fuses.
C. The float switch does not allow starting.
A. The intake grid or the pipes are blocked.
B. The impeller is worn or blocked.
C. The check valve, if installed on the delivery pipe, is
blocked in closed position.
D. The level of the liquid is too low. When starting, the
level of the liquid must be higher than that of the
strainer.
E. The required head is higher than the pump
characteristics.
A. The switch is not disactivated by the float.
A. Ensure that the intake grid is not partly blocked.
B. Ensure that the impeller or the delivery pipe are not
partly blocked or encrusted.
C. Ensure that the impeller is not worn.
D. Ensure that the check valve (if fitted) is not partly
clogged.
E. On three-phase motors, check that the direction of
rotation is correct (See the paragraph on
"CHECKING THE DIRECTION OF ROTATION").
A. Check that the liquid to be pumped is not too dense
as this could cause overheating of the motor.
B. Check that the water temperature is not too high.
C. The pump is partly blocked by impurities.
D. The pump is mechanically blocked.
ENGLISH
B. If they are burnt-out, change them.
C. -Ensure that the float moves freely.
A. Remove the blockage.
B. Change the impeller or remove the blockage.
C. Check that the valve is operating correctly and
D. Adjust the length of the float switch cable
A. -Ensure that the float moves freely.
B. -Check float efficiency (the contacts could be
A. Remove any blockage.
B. Remove any blockage.
C. Change the impeller.
D. Carefully clean the check valve.
E. Invert the connection of two supply wires.
C. Carefully clean the pump.
D. Check whether there is rubbing between the
4
REMEDY
-Ensure that the float is efficient (contact the
supplier).
replace it if necessary.
(SEE THE PARAGRAPH ON "ADJUSTING
THE FLOAT SWITCH").
damaged - contact the supplier).
moving and fixed parts; check the wear of the
bearings (contact the supplier).
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