10.4.2
Repair work
Modifications and repair work may only be carried
out by qualified persons or persons with suitable
training with the manufacturer's consent and must
strictly comply with the rules set out in the mainte-
nance instruction for the components concerned.
Hint!
The following maintenance notes must
be observed:
Only spare parts made by the original component
manufacturer may be used for repairs and for replac-
ing wearing parts. These are available from the
spare parts department.
10.4.2.1
Repair information
Important features of the technology and production
process must be taken into account when repairing
the plant:
–
complete sealing of all devices and pipes.
–
Dryness and cleanliness of the entire plant.
–
Use of welding methods causing only a minimum
amount of dirt to collect in the plant.
–
Pipes bent on a pipe-bending machine only
using refrigerating oil.
–
If repairing the piping system from your own
stocks, we recommend that you use a pipe with
NBK surface quality (annealed and descaled,
mechanically or chemically descaled after
annealing).
–
When carrying out repairs to piping systems,
care should be taken to maintain the original pip-
ing routes.
–
Only pipes of sufficient material quality, which
are certified according to DIN 10216-2 should be
used.
10.4.2.2
Repairs of pressure vessels
subject to approval inspection
Hint!
The responsible monitoring body
(e.g.TÜV) must be notified in advance.
New inspection and approval is required after pres-
sure vessels that are subject to approval have been
repaired or changed. Welding may only be carried
out by approved welders with a valid welder’s card.
10.4.3
Maintenance intervals
Caution!
The maintenance intervals in accord-
ance with the maintenance schedule
must be observed.
The maintenance schedule is an integral part of the
product documentation. The maintenance schedule
contains all the maintenance instructions and certifi-
cations for the first 15 years of performance of the
screw compressor package. The maintenance certifi-
cates are completed and signed as well as acknowl-
edged on the display of the control as part of the
inspection and maintenance by authorised fitters as
evidence of the work done.
During the warranty period, these validated mainte-
nance certificates also serve as a precondition for
any warranty claim put to GEA Refrigeration Ger-
many GmbH.
10.4.4
Maintenance work
Hint!
The documentation for the main com-
ponents is a part of the product docu-
mentation. This contains important
information to be considered before
beginning the maintenance work.
10.4.4.1
Maintenance of the screw
compressor
Maintenance works are to be periodically carried out
on the screw compressor (see maintenance sched-
ule). These include:
–
Measure axial play of bearings,
–
Check shaft seal,
–
Check primary slide movement,
–
Check the adjustment of the position sensor.
Cleaning, maintenance, repair
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
74
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015
Summary of Contents for Grasso M-Series
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