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3.1.3 Free-standing submerged installation
Pumps for free-standing submerged installation can
stand freely on the bottom of the pit or similar
location. See fig. B in
The pump must be mounted on separate feet
(accessory).
In order to facilitate service on the pump, fit a flexible
union or coupling to the outlet line for easy
separation.
If a hose is used, make sure that the hose does not
buckle and that the inside diameter of the hose
matches that of the pump outlet port.
If a rigid pipe is used, fit the union or coupling, non-
return valve and isolating valve in the order
mentioned, when viewed from the pump.
If the pump is installed in muddy conditions or on
uneven ground, we recommend that you support the
pump on bricks or a similar support.
Proceed as follows:
1. Fit a 90 ° elbow to the pump outlet and connect
the outlet pipe or hose.
2. Lower the pump into the liquid by means of a
chain secured to the lifting bracket of the pump.
We recommend that you place the pump on a
plane, solid foundation. Make sure that the pump
is hanging from the chain and not the power
cable.
3. Hang up the end of the chain on a suitable hook
at the top of the pit and in such a way that the
chain cannot come into contact with the pump
housing.
4. Adjust the length of the power cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief
fitting to a suitable hook at the top of the pit.
Make sure that the cables are not sharply bent or
pinched.
5. Connect the power cable and the control cable, if
any.
3.2 Electrical connection
Carry out the electrical connection according to local
regulations.
The free end of the cable must not be
submerged as water may penetrate
through the cable into the motor.
If several pumps are installed in the same
pit, the pumps must be installed at the
same level in order to allow optimum pump
alternation.
DANGER
Electric shock
Death or serious personal injury
- Connect the pump to an external main
switch which ensures all-pole
disconnection with a contact separation
according to EN 60204-1, 5.3.2.
- It must be possible to lock the main
switch in position 0. Type and
requirements as specified in EN 60204-
1, 5.3.2.
Connect the pumps to a control unit with a
motor protection relay with IEC trip class
10 or 15.
Pumps to be installed in potentially
explosive locations must be connected to
a control unit with a motor protection relay
with IEC trip class 10.
The permanent installation must be fitted
with an earth-leakage circuit breaker.
Make sure there are at least 3 m free cable
above the maximum liquid level.
