Outdoor Installation; Electrical Installation; Compressed Air Installation; Using Vac 20 - Nederman VAC 20 Manual De Instrucciones

Noise levels for the VAC series vary according to size,
EN
site and running conditions. See
al data for measured noise levels. The noise level will
rise by several dB(A) when the airflow starts getting
close to the flow restrictor setting. Measurements
have been made free-field with the unit standing on a
reflective base in accordance to ISO 11201 standard.
The noise levels can be several dB(A) higher in a room
with hard reflective walls. The noise level can be re-
duced by an optional silencer, see
Section 4.1 Overview.
6.1.2 Outdoor installation
Also, consider the following if the unit is installed out-
doors:
• Cover the top of the unit to protect it from snow,
rain or falling debris.
• Avoid placing the unit against a wall directly ex-
posed to the sun.
6.1.3 Electrical installation
Connect the motor to the start and control unit and/or
optional Maintenance switch.
For electrical connections, see the start and control
unit's manual and also
tions may vary depending on the options chosen. Con-
necting material such as cables is not included with
the unit.
Most failures are results from faults in the electric-
al equipment or connections. The motor overload re-
lay must be of the 'heavy start type' as some units are
heavy to start. Otherwise, the motor overload may trip
because of the high current and the long time spent in
the Y-mode.
The electrical installation must be made by a
qualified electrician.
National and local electric regulations must be
followed.
Start and control units from Nederman have termin-
als for easy connection of all control cables. If other
equipment is used, this equipment must be similarly
equipped and connected for the guarantee of the VAC
20 unit to be valid.
ASC by PLC
For connecting the VAC to be run using ASC by PLC in
the start and control unit. See the start- and control
units' wiring diagram.
ASC by optional adaption kit
For connecting the VAC to be run using the adaption
kit, with the optional components for when not using
ASC by PLC. See the manual included in the adaption
kit.
18
Section 3.1 Technic-
Figure 2 Item 1 and
Figure 6 and Figure 7. Connec-
VAC 20
The current transformer is to be connected to
the relay box prior to starting the vacuum unit.
Otherwise, the transformer may be ruined.
6.1.4 Compressed air installation
Requirements
For air consumption, quality and maximum and minim-
um pressure, see Section 3.1 Technical
The specified air consumption of the unit is
limited to the short operation of the start-up
valve.
As new pipes may contain dirt, particles or debris, the
compressed air pipe is to be blown clean before con-
necting the VAC 20.
The enclosed compressed air filter must be installed
to ensure the reliable and safe operation of the unit. A
main compressed air valve, that vents the remaining
pressure of the unit, should be installed, see
Item 16.
Take necessary measures to avoid water or hu-
midity in the compressed air when the unit is
installed in cold environments.
If antifreeze additives are used, use them con-
tinuously. Once added, the removal of anti-
freeze additive can cause the pneumatic com-
ponents to malfunction.
Installation
Connect a compressed air supply to the inlet, see
ure 5.
7 Using VAC 20
7.1 Before start-up
The vacuum unit and any auxiliary options are tested
before delivery and all functions are checked. A test
report accompanies each unit.
Ensure the following before the initial start-up:
• The maintenance switch is installed (if used).
• The installation room has ventilation openings (if
used indoors). See
• Dust collector, duct and valves at the worksites are
connected.
• Exhaust air is ducted away from the installation (if
used indoors).
• Make sure the exhaust duct is protected from rain
and snow.
• Make sure the exhaust duct is fitted with a grid so
no foreign objects can get into the duct.
• The compressed air supply is permanently fitted.
• All electrical connections have been correctly made
as in Figure 6 and Figure 7.
data.
Figure 5
Section 6.1.1 Indoor installation.
Fig-