Cable Fitting; Installation Depth - EBARA BHE Serie Manual De Empleo E Instalación

5.3 CABLE FITTING

Use cable clips every 3 meters to fix the cable to
the support rope or to the delivery pipe.
Use plastic cable clips as shown in fig. 4.
Once the cable has been fastened, cut off the
remaining part of the clip.
3mt
Should plastic pipes be used, do not stretch the
electric cable and the support rope in order to
avoid the tearing of the electric cable due to the
plastic pipes stretch caused by the weight of the
water contained in it.
When flanged pipes are used, the cable clips must
be positioned before and after each flange.
5.4 LOWERING OF THE PUMP
Verify that the well is not clogged along its total
length.
Lower the pump into the well, paying attention not
to damage the electric cable.
Note: Do not lower the pump by means of the
electric cable.

5.5 INSTALLATION DEPTH

The dynamic water level must always be above
the suction support of the pump – see paragraph
3.1 Positioning Limits and Fig. 5.
The minimum safety margin shall be 1 meter.
14
Fig. 4
Lc
Lt
La:
Minimum installation depth
(suggested: minimum 1 mt).
Lb:
Static water level
Lc:
Dynamic water level
Ld:
Difference between static and dynamic level
Lt:
Installation depth
Block the delivery pipe with proper hangers on the
well head.
Loosen the support rope and fix it to the groun-
dwork.
6. START-UP
When the pump has been installed and submer-
ged, it can be started with the gate valve closed to
1/3.
Check the direction of rotation as described in sec-
tion 4.2 Verification of Rotation Direction.
If there are impurities in the water, the gate valve
should be opened gradually until the water beco-
mes clearer. The pump should not be stopped until
the water is completely clean again, since other-
wise the pump parts and the non-return valve may
be damaged.
If the pump flow rate is higher than that of the well,
the use of a protection device against dry opera-
tion is recommended.
Without any protection against dry operation, the
water level falls under the suction support and the
Ld
Fig. 5
Lb
La