General installations and maintenance instructions
LABOVAC VACUUM UNITS
Page 8/12
05/2013
Manual N° 514774 version 8
8.3.
Power supply (see electrical circuit diagram attached)
Power supply must be removed prior to any intervention on the station
.
Connection to the power supply must be carried out by a qualified electrician.
Refer to the motors or stations rating plates in order to insure that the voltage used on site is that required by
the equipment.
Connect the station to power supply via the terminals L1–L2–L3–N + Earth, using power cord having
conductor section capable of supporting the total power requirements of all the motors that make up the
station (see table below).
Power cables must be protected upstream using a surge protection device in accordance
with current legislation and standards of your country.
Each motor is protected by a magneto-thermal starter as standard.
Vacuum pump
ANTIGUA
3-ph 400V
50 Hz
S26 S51 S126
S161
S251
S325
Power per pump
kW 0.75 1.5 3
4 5.5 7.5
Line intensity
A 2 3.5
4.5
9.5
12
17
For 1 pump
Cable section
mm² 1.5 1.5 1.5 2.5 2.5 4
Protection to be fitted
A 4 6 10
16
16
25
For 2 pumps
Cable section
mm² 1.5 2.5 2.5 4 6 10
Protection to be fitted
A 6 10 16 25 32 50
8.4.
Connections to the pneumatic network
8.4.1. Suction
side
Connect the anti-bacteria filtration inlet to the network using rigid piping or hose. A valve must be positioned
between the hose or the rigid piping and the network (see the mechanical architecture section).
8.4.2. Exhaust
side
The exhaust collector must be connected to a gas evacuation canalisation, which leads to the outside of the
building, either via the façade or vertical duct (standard EN 737-3).
Beware of rainfall penetration or blockages caused by nests or other obstacles.
8.5.
Water supply of vacuum pumps
Do not run the liquid-ring vacuum pump dry.
During operation, the LABOVAC unit must be continually supplied with soft water. (see mechanical architecture).
For each pump, water intake is equipped with:
a
valve,
a filter to stop foreign particles,
a mechanical pressure switch to control the water pressure and to stop the pump if the water pressure is
lower than 1 bar,
a solenoid valve open when the motor is on and closed when the motor is off,
a control valve.
See the technical manual of the vacuum pump for the water consumption.