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Pump model
Screw type
80–120F
100–120F
WARNING:
check for the presence of leaks after re-
assembling the pump.
4.6 Electrical installation
Precautions
Electrical Hazard:
• Make sure that all connections are
performed by qualified installation
technicians and in compliance with
the regulations in force.
• Before starting work on the unit,
make sure that the unit and the con-
trol panel are isolated from the power
supply and cannot be energized.
Grounding (earthing)
Electrical Hazard:
• Always connect the external protec-
tion conductor to ground (earth) ter-
minal before making other electrical
connections.
• All electrical equipment must be
ground (earth ) connected. This ap-
plies to the pump unit and related
equipment. Verify the pump ground
terminal is earthed.
NOTICE:
The number of power on and power off of the pump
must be less than 3 times per hour and in any case
less than 20/24h.
In case frequent start/stop operations are required
by the application, the use of the dedicated external
start/stop input is strongly suggested (for details see
section 5.2.6).
4.6.1 Power supply connection
WARNING:
Do not make any connection in the pump
control box unless the power supply has
been switched off for at least 2 minutes.
For models with "plug
connector" (25-40,
25-60, 32-40, 32-60).
See
Figure 16
.
Torque
1. Open the connector
cover and insert the
cable inside the ca-
ble gland.
2. Pull down the con-
tact retention spring.
3. Connect the cable
according to the wir-
ing diagram.
4. Align the two parts of
the connector
5. Push the two parts
one inside the other.
For models with a stand-
ard terminal block con-
nection. See
Figure 15
.
For cable requirements, see section 4.6.3.
4.6.2 I/O connections
1. Open the terminal box cover removing the
screws (5). See
Figure 14
2. Connect the appropriate cable according to the
terminal block diagram. See
19
and the requirements of section 4.6.3.
3. Close the terminal box cover and tighten the
screws to 1.2 Nm.
4.6.3 Connection assignment
NOTICE:
• For all the connections use heat resistant cable
up to +85°C (+185°F). The cables never have to
touch the motor housing or the pump or the pipe-
line.
• Wires connected to supply terminals and fault
signal relay (NO,C) must be separated from oth-
ers by reinforced insulation.
Only for
PLUG Con-
25-40,
nector
25-60,
32-40,
32-60 Mod-
els
Power sup-
3 x
ply
0.75÷1.5m
2
m
(2P+T)
Fault signal
en - Original instructions
6. Close the connector
and tighten carefully
to the cable gland.
1. Open the terminal
box cover removing
the screws (5).
2. Use the M20 cable
gland for the power
cable.
3. Connect the cable
according to the wir-
ing diagram. See
Figure 17
and
Figure
19
.
a. Connect the ground
(earth) lead. Make
sure that the ground
(earth) lead is longer
than the phase
leads.
b. Connect the phase
leads.
4. Close the terminal
box cover and tight-
en the screws to 1.2
Nm.
and
Figure 15
Figure 18
,
Figure
M12 (1) Ca-
M12 (2) Ca-
ble Φ 2÷5
ble Φ 2÷5
mm
mm
2 x
0.75÷1.5m
2
m
21
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