Electrical Connection; Paint And Insulation; Start-Up Procedure; Checking The Electrical Connection - GEA Grasso M-Series Operating Manual

Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
Hint!
In principle, all the connections must
be made in accordance with the P+I
diagram applying to the respective
project. Attach the pipes to the screw
compressor package in such a way
that no additional static or dynamic
loads are imposed.
All the pipes and systems to be con-
nected must be checked for leaks
when the work is complete.
8.3.2

Electrical connection

Danger!
Contact with live components is pro-
hibited.
The screw compressor package has been designed
for plug-in and reliable automatic operation.
All connections must be carried out according to the
current installation regulations.
Connections to the screw compressor package must
be flexible and free of loads.
Hint!
Dimensioning of the inlet pipe cross-
sections must be according to DIN
VDE 100 Part 520.
Before starting work, make sure that all parts to be
connected are de-energised, e.g. by removing the
main fuse in all phases or installing a jumper wire.
The insulation resistance of the electrical tools and
fixtures and wiring is to be checked. The connection
may only be undertaken if this value lies in the allow-
able range.
Connections and almost all external connections are
pre-wired at the factory.
Warning!
Produce the earth connection accord-
ing to the designation in the general
assembly drawing. See chapter "Des-
ignation of the earth connection".
The electrical consumers and sensor must be con-
nected according to the circuit diagram. All electrical
connections must be made according to the circuit
diagram, e.g.
– Compressor drive motor
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015
– Compressor control supply
– Oil heater
–
Oil pump
Some external components, such as the second
EMERGENCY STOP switch, the ammonia sensor
and the fans of the machine room, must be connec-
ted by the system erector on site.
Hint!
Check that terminal screws (in the
switching cabinet) are tight.
8.4

Paint and insulation

Damage to the paint and insulation during transport
and installation must be carefully repaired.
8.5

Start-up procedure

The following procedures should be completed in the
sequence in which they are described:
8.5.1 Checking the electrical connec-
tion
Danger!
Contact with live components is pro-
hibited.
Check that all electrical work has been carried out in
accordance with the standards (e.g.protective earth,
insulation, shielding, covers). If necessary, an earth
connection must be provided.
8.5.2

Leak test

Hint!
See type plate for permissible operat-
ing pressure.
The necessary safety precautions should be taken
before performing the leak test.
An approx. 3-hour pressure drop test with dry nitro-
gen is used for the test. Test pressure: 7 bar
A pressure drop of 2% is allowed during the 3 hours.
Fluctuations in the ambient temperature must be
taken into account.
Start-up
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