Close coupled multi-stage
submersible clean water pumps
MXS
OPERATING INSTRUCTIONS
1. Operating conditions
Standard construction
- For clean water with a maximum temperature of
35 °C and maximum sand content of 60 g/m
3
.
- Minimum internal diameter of well: 132 mm.
- Minimum immersion depth: 100 mm.
- Maximum submersion depth: 20 m (with suita-
ble cable length.
- Maximum starts/hour: 30 at regular intervals.
Sound pressure at minimum immersion depth:
< 70 dB (A).
Noise disappears when the pump is submersed.
Do not use in ponds, tanks or swimming
pools when people may enter or come
into contact with the water.
2. Installation
The internal diameter of the delivery pipe must
never be smaller than the diameter of the pump
connection port: G 1
1
/
4
(DN 32).
The pump must be installed in the vertical position
with the delivery connection facing upwards.
The pump can be installed immersed (min 100 mm)
or submersed (max 20 m) either resting on a bot-
tom surface or suspended.
2.1. Pump in the resting position
The pump can be rested on the flat bottom sur-
face of a tank.
When sand or slime deposits are expected to form,
mount the pump on a surface raised from the bot-
tom level so that abrasive matter is not lifted.
2.2. Pump in the suspended position
The pump can be held in a suspended position by
the metal delivery pipe. Tighten the threaded pipe
joints firmly to avoid loosening during operation.
Position the pump at a distance of at least 0.5 m
from the bottom of a well so that sand is not lifted.
A
safety rope or chain
of non-perishable material
should always be used to secure a suspended pump.
When a plastic or flexible delivery pipe is used,
the safety rope or chain should be utilized for low-
ering, securing and raising the pump.
Never use the electric power cable to
suspend the pump.
Attach the power supply cable to the delivery pipe
and to the safety rope with cable clamps at inter-
vals of about 3 m. The power cable should not be
taut: allow for a certain degree of slackness
between the clamps to avoid the risk of strain
caused by expansion of the pipe during operation.
3. Electrical connection
Electrical connection must be carried out
only by a qualified electrician in accor-
dance with local regulations.
Follow all safety standards.
The unit must be always earthed, also with a
non-metallic delivery pipe.
5
0.5 m
max 20 m
min
3.93.007/1
132 mm
min
3
1
5
4
2
6
7
1. Electric power cable
2. Delivery pipe
3. Safety rope
4. Pressure gauge
5. Air vent valve
6. Check valve
7. Gate valve
3.93.007/2
min 100 mm
Min. 100 mm
Max. 700 mm
Max. 600 mm
Off
On
3.93.007/3
Construction
with float switch
Construction
without float switch
