6. Preparations for commissioning
30
6.2
Compressed air connection
Fig. 10
Fig. 11
1 Compressed air connection
2 Thread identification compressed air connection
The compressed air line system is connected at the
compressed air supply of the screw compressor
( - 1 - Fig. 10).
For this you should use a flexible connection
(e.g. compressed air hose, compensator).
Europe-Version:
DIN 2999 R 1 1/2"
USA/CANADA-Version:
NPT 1 1/2“ - 11-1/2
Danger
When connecting the compressor on the mains side
to the compressed air system available at the
customer‘s end, check the operating temperatures
and operating pressures required and examine the
required connecting flange or the connection thread
for proper type, size and functioning. (see fig. 11).
In the case of connections by means of connecting
hoses, take appropriate measures to prevent
whipping of the loose end in the event that the
hose connection tears off.
6.3
Electrical connection
6.3.1
Electrical connection (EUROPE-
Version only)
Compressor units are finished in the factory according
to standard EN60204 (industrial machinery). Please
observe the following important notes:
Danger
The power supply to the compressor side has to be
fitted for industrial equipment and fulfilling the
requirements of EN60204-1/IEC60204-1. To avoid
strong damages and fire on the power electric
components, any kind of operation outside of the
stated limits of EN60204-1/IEC60204-1 is
inadmissible.
The customer has to connect a main switch in the
incoming line of the compressor unit (unless
factory-mounted as special accessories)
(DIN EN 1012 - 1).
If this switch does not provide short-circuit and
overload protection for the system, suitable
back-up fuses have to be installed according to
EN 60269-1 (low voltage directive ) (see table).
The main switch must meet the requirements of the
safety standard EN 60 204-1 (electrical equipment
of machinery) as well as of EN 60947-2 (low-
voltage switchgear and control gear (circuit-
breakers)).
The electrical connection and protective measures
have to be installed in accordance with VDE, BS or
local regulations. As a rule, additional instructions
of the relevant power supplier have also to be
adhered to.
The electrical connections must be made by an
authorized specialist.
Attention: Interference voltage!
If external electric circuits, which cannot be cut out
via the main switch, are connected to the control,
these have to be identified according to EN60204.
Warning signs have to be fixed near the main
switch and near these electric circuits. In addition,
these conductors have to be laid separately and/or
identified by colors. Work on control cabinets may
only be carried out by electrotechnical specialists.
If the installation conditions of the system differ
from the conditions described in EN60204, please
contact your technical adviser.
