Mechanical Cleaning; Chemical Cleaning; Maintenance; General Instructions - GEA Grasso M-Series Operating Manual

Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
10.3.1

Mechanical cleaning

Mechanical cleaning is a maintenance measure in
order to ensure the continuous safe operation of the
screw compressor package.
Components of the screw compressor packages
(e.g.suction filter) can be removed for manual
mechanical cleaning. Proceed in accordance with
the details in the applicable component documenta-
tion. After completing cleaning work, properly mount
the component and check for leakage.
10.3.2

Chemical cleaning

Chemical cleaning of the screw compressor package
is not recommended by GEA Refrigeration Germany
GmbH.
10.4

Maintenance

10.4.1

General instructions

Danger!
Contact with live components is pro-
hibited.
Maintenance work on the running
screw compressor package is not per-
mitted.
Work involving intervention in the refrigerant circuit
must only be carried out by qualified engineers in
accordance with the guarantee conditions.
The screw compressor package must always be
switched off before being dismantled. Before begin-
ning the work, it must be ensured that all parts sub-
ject to maintenance/servicing are de-energised(e.g.
by removing the main fuse or installing a shorting
bridge).
The refrigerant must be removed from the applicable
parts of the system parts. This work must be carried
out with great care, taking into account the safety
regulations, so that the maintenance personnel are
not injured by the refrigerant or by the refrigeration
unit oil present in the system.
Parts of the system under pressure must be com-
pletely vented before opening. While carrying out the
repair, it is must always be ensured that a complete
pressure balance of the affected pressure chambers
with the environment is preserved.
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015
During cleaning, repair or maintenance work, the
screw compressor package or its components must
be protected against the penetration of moisture in
order to prevent impairment of the function of the
components.
The chief principle must be to keep air and moisture
entering the screw compressor package to an abso-
lute minimum. All foreign substances must kept as
far away as possible or eliminatedincluding
– welding residues,
– sealing remnants,
–
auxiliary materials such as grease, oil or sol-
vents.
Welding and soldering work may only be performed
with written permission. The requisite protective
measures must be defined. These include:
– personal protective measures when opening the
respective part of the system,
– complete draining of the respective part of equip-
ment,
– cleaning with the appropriate cleaning agents,
– concentration measurements,
– ensuring sufficient ventilation and venting,
– performance of all welding work with the use of
forming gas.
If gas filled pipes are opened for maintenance work,
these pipes must be in a gas-free condition.
Cleaning, maintenance, repair
73