GEA Bock F - Manual (Page 19)

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6| Commissioning
CAUTION! Wear personal protective clothing such as goggles and
protective gloves!
Make sure that the suction and discharge line valves are open.
With the compressor switched off, add the liquid refrigerant directly to the condenser or receiver,
breaking the vacuum.
If the refrigerant needs topping up after starting the compressor, it can be topped up in vapour
form on the suction side, or, taking suitable precautions, also in liquid form at the inlet to the
evaporator.
6.5 Refrigerant charge
ATTENTION! Avoid overfilling the system with refrigerant!
To avoid shifts in concentration, zeotropic refrigerant blends
must always only be filled into the refrigerating plant in liquid
form.
Do not pour liquid coolant through the suction line valve on
the compressor.
It is not permissible to mix additives with the oil and refrigerant.
6.6 Shaft seal
ATTENTION! Failure to observe the following instructions can cause loss of
refrigerant and damage to the shaft seal!
INFO! The shaft seal seals and lubricates with oil. An oil leakage of
0.05 ml per operating hour is therefore normal. This applies
particularly during the run-in phase (200 - 300 h).
The compressor types F14 and F16 are equipped with a leak oil
drain hose (see chapter 10 and 11). The leak oil is continually
discharged through the leak oil drain hose. To collect the leak oil,
a receptacle is to be provided by the plant operator. Dispose of
the leak oil in accordance with the valid national regulations.
The compressor shaft is sealed to outside using a shaft seal. The sealing element rotates with the
shaft.
The following is especially important to ensuring fault-free operation:
The complete refrigerant circuit must be correctly executed and clean inside.
Heavy shocks and vibrations to the shaft as well as continuous cyclic operation are to be avoided.
The sealing surfaces can stick together during prolonged downtimes (e.g. winter). Therefore, run
the system every 4 weeks for 10 minutes.