Oil Pump Maintenance; Changing The Fine Oil Separation Cartridges; Fig. 47 Arrangement Of Min / Max Sight Glasses - GEA Grasso M-Series Operating Manual

Cleaning, maintenance, repair
10.4.4.5.4 Used oil
Refrigeration machine oil drained from the circuit is
no longer suitable for use in refrigeration plants. It
has to be stored or transported in appropriately label-
led containers in accordance with the legal provi-
sions. The operator is responsible for its proper dis-
posal.
10.4.4.5.5 Draining the oil
It may be necessary to drain the oil:
– to inspect or repair the compressor
and
– if there is too much oil in the circuit.
The oil must be drained in accordance with points 1
to 6 of the chapter entitled "Carrying out oil change".
The oil must be drained through the filling hose and
into a container suitable for waste oil.
10.4.4.5.6 Check the oil level
fig.47: Arrangement of MIN / MAX sight glasses
1 Sight glass - MAX (operation)
2 Sight glass - MIN (standstill)
The oil level is checked visually via the sight glasses
of the oil separator. The oil level should have a value
between 1/2 filling level of sight glass N10c (MAX -
operation) and 1/2 height of sight glass N10b (MIN -
standstill).
If the oil level is too low, i.e. the oil level has a value
less than 1/2 filling level of sight glass N10b (MIN -
standstill), oil must be replenished.
78
10.4.4.5.7
See chapter entitled "Start-up, charging with oil".
Hint!
For permissible types of oil, please
refer to the technical information enti-
tled "Lubricating oils".
Oil removed from the compressor
must not be re-used. Always use fresh
oil from sealed containers! Do not mix
with other types of oil.
10.4.4.6

Oil pump maintenance

Assuming correct installation in accordance with the
conditions of use and correct fitting, gear pumps
have the design prerequisites for long and fault-free
operation.
The gear pumps require a minimum of maintenance
which is, however, indispensable for fault-free opera-
tion since experience has shown that a high percent-
age of the faults and damage which occur are attrib-
utable to the ingress of dirt and inadequate mainte-
nance.
The maintenance intervals have been defined in the
maintenance checklist (part of the product documen-
tation).
An oil leakage of up to one drop/minute is required
for the lubrication of the shaft seal and is permissi-
ble.
The shaft seal is maintenance-free. If the oil leakage
is too great, replace it according to the oil pump doc-
umentation.
Hint!
The regular examination of all operat-
ing data, such as pressure, tempera-
ture, power consumption, degree of fil-
ter fouling, etc., helps in the early
detection of potential failure!
10.4.4.7 Changing the fine oil separa-
tion cartridges
The fine oil separation cartridges should be replaced
no later than after 25,000 run hours or 5 years.
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
Charging with oil, topping
up with oil