* not shown in the picture
** integrated into the screw compressor
7.7.1 Screw compressor
fig.19: GEA Grasso M-Series, arrangement of the SCP
The screw compressors are characterised by a com-
pact design, high reliability, high quality components
and ease of maintenance.
Screw compressors are dual rotor positive displace-
ment machines that run according to the displace-
ment principle and operate by oil injection.
Screw compressors are operated with refrigerant
(standard: ammonia NH
3
, other refrigerants upon
request). For the refrigerant, refrigerating machine oil
is chosen in accordance with lubricating oil informa-
tion for screw compressors.
Various series and sizes of screw compressors are
available for different fields of application.
The screw compressors are driven directly by the
compressor drive motor via a flexible coupling.
Hint!
The documentation of the screw com-
pressor (installation instructions, part
lists, drawings) is an integral product
documentation.
7.7.2 Compressor drive motor
fig.20: GEA Grasso M-Series, arrangement of the compressor
drive motor
Standard: The compressors are driven via a cou-
pling by means of an air-cooled 2-pole IP23 electric
motor with an operating voltage of 400 V; 50 Hz.
Option: Other protection classes, operating voltages
and frequencies as well as speed-controlled motors
are available on request.
Hint!
The documentation of the electric
motor (operating manual) is an integral
part of the product documentation.
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
Description of Design and Function
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015 39
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