Calpeda MXV-B Instructions Pour L'utilisation page 18

MXV(L)4 25,32,40 screw the union couplings or the
flanges into the threaded ports (ISO 228) by inserting
in the joint a suitable sealing material.
Tighten the pipes or union couplings only to the extent
sufficient to ensure a tight seal. Excessive torque may
damage the pump.
GB
With flanged ports make sure the gaskets do not
protrude inside the pipes.
Fig. 3 Systems diagram
A = Suction lift operation
B = Positive suction head operation
4
5
B
1
5
A
2
1
6.7.1. Suction pipe
When a pump is located above the water level
(suction lift operation, fig. 3 A), fit a foot valve with a
strainer, which must always remain immersed.
The suction pipe must be perfectly airtight and be led
upwards in order to avoid air pockets.
When the liquid level on the suction side is above
the pump (inflow under positive suction head, fig. 3
B), fit a gate valve.
Follow local specifications if increasing network
pressure.
Install a strainer on the suction side of the pump to
prevent foreign particles from entering the pump.
6.7.2. Delivery pipe
Install a gate valve in the delivery pipe to regulate flow-
rate, head and absorbed power.
Install a pressure gauge between the pump and the
gate valve.
ATTENTION: install a check valve between the pump
and the gate valve in order to avoid reverse flow after
switching off the pump unit and to protect the pump
from water hammering.
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5
3.93.113
7 7
1. Strainer
2. Foot valve
3. Check valve
4. Bypass valve
5. Gate valve
6. Pressure gauge
7. Supports and clamps for
pipelines
With servo-operated shut-off devices, provide an air
vessel or other protection device against surge of
pressure in the case of sudden changes of flow rate.
6.8. Electrical connection
OFF
Electrical connection must be carried out only
by a qualified electrician in accordance with
5
local regulations.
Follow all safety standards.
3
The unit must be properly earthed (grounded).
Connect the earthing (grounding) conductor to the
terminal with the
Compare the frequency and mains voltage with the
6 name-plate data and connect the supply conductors
to the terminals in accordance with the appropriate
diagram inside the terminal box cover.
ATTENTION: never allow washers or other
metal parts to fall into the internal cable
opening between the terminal box and
stator. If this occurs, dismantle the motor to
recover the object which has fallen inside.
ATTENTION: with motor power rating ≥ 5.5 kW
avoid direct starting. Provide a control panel
with star-delta starting or an
device.
If the terminal box is provided with an inlet gland, use
a flexible power supply cord of the H07 RN-F type with
section of cable not less than 11 TAB IEC 60335-1.
If the terminal box is provided with an inlet bushing,
connect the power supply cord through a conduit.
For use in swimming pools (not when persons are in
the pool), garden ponds and similar places, a residual
current device with IΔN 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 in
all poles.
With a three-phase motor install an overload protection
device with curve D appropriate for the rated current
of the pump.
Single-phase MXV-BM, are supplied with a capacitor
connected to the terminals and (for 220-240 V - 50 Hz)
with an incorporated thermal protector.
Electrical diagram (only for Calpeda motors)
W2 U2 V2 W2 U2
U1 V1 W1 U1 V1 W1
L3 L2 L1 L3 L2 L1
MXV-B 25,32,40
MXV(L), MXV(L)4 25,32,40 MXV(L), MXV(L)4 50-65-80
Refer to any other instructions (if supplied) for use
of the motor.
ATTENTION: When the pump is fed by a
frequency converter, the minimum frequency
should not fall below 25Hz and in any case the
total head of the pump should never be lower
than 3 m.
MXV, MXV-B Rev4 - Operating Instructions
marking.
other starting
V2 W2 U2 V2 W2 U2
U1 V1 W1
L1 L2 L3 L1 L2 L3
MXV-B 50
V2
U1 V1 W1