7
Never use the electric power cable to
suspend the pump.
Attach the power supply cable to the delivery pipe
or to the safety rope with cable clamps. The
power cable should not be taut: allow for a certain
degree of slackness to avoid the risk of strain
caused by expansion of the pipe during
operation.
3.3. Fixed installation with automatic
coupling feet and guide rails.
The automatic coupling system allows for quick
and efficient inspection operations.
The coupling foot is fastened to the bottom of the
sump together with the delivery pipe; two guiding
tubes connect it to the anchoring bracket secured
to the edge of the sump cover.
The pump is lowered along the guiding tubes until
it reaches the exact coupling position; the seal
will be tight thanks to the weight of the pump.
This operation can be repeated any number of
times and it makes checking and inspection
operations easier; the pump is simply extracted
from the sump by means of a chain (even if the
system is flooded).
4. Electrical connection
Electrical connection must be carried
out only by a qualified electrician in
accordance with local regulations.
Follow all safety standards.
The unit must be always earthed, also with a
non-metallic delivery pipe.
Make sure the frequency and mains voltage
correspond with the name plate data.
For use in swimming pools (not when persons are
in the pool), garden ponds and similar places, a
residual current device
with I∆N not exceeding
30 mA must be installed in the supply circuit.
Install a
device for disconnection from the
mains
(switch) with a contact separation of at
least 3 mm on all poles.
When extension cables are used, make sure the
cable wires are of adequate size to avoid voltage
drops and that the connection stays dry.
4.1. Single-phase pumps GXCM, GXVM
Supplied with
incorporated thermal
protector, with
power cable type
H07 RN8-F, 4G1 mm
2
and with float
switch.
Control box with
capacitor supplied
on request.
Electrical diagram
4.2. Single-phase pumps GMCM, GMVM
Supplied with incorporated capacitor and thermal
protector, with power cable type H07 RN8-F,
3G1.5 mm
2
with plug and float switch.
4.3. Three-phase pumps GXC, GXV
Install in the control box an overload-protective
device in accordance with the name-plate current.
4.4. Three-phase pumps GMC, GMV
Fitted with 2 thermal protectors which are connected
in series and inserted between two different phases.
The thermal protectors, in the three-phase motors,
provide protection against overloading and not
against operation with a blocked rotor.
The control box must therefore also be fitted with
a suitable hot-wire ammeter relay cuopled with
the control contactor.
Follow the electrical circuit diagram indicated below
With three-phase pumps, when the water level is
not under direct visible control, install a float
switch connected to the control box to protect the
pump against dry running and to set the water
levels to stop and automatically start the pump.
green/yellow
black
blue
maroon
grey
grey
Motor
3 ~ 220-240 V
3 ~ 380-415 V
To the terminal connection
points of the contactor
Thermal protectors
to connect to the
contator coil
4.93.002/2
M
1
black
grey (blue)
maroon
green/yellow
4.
93
.0
02
/3
