GEA Bock HG66e Series, Руководство по сборке

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8.4 Evacuation
First evacuate the
system
and then include
the compressor in the evacuation process.
Relieve the compressor pressure.
Open the suction and pressure line shut-off valves.
Evacuate the suction and discharge pressure sides using the vacuum pump.
At the end of the evacuation process, the vacuum should be < 1.5 mbar when the pump is switched off.
Repeat this process as often as is required.
For HC and LG compressors suitable equipment approved for flammable refrigerants
must be used.
ATTENTION Do not start the compressor if it is under vacuum. Do not apply
any voltage - even for test purposes (must only be operated with
refrigerant).
Under vacuum, the spark-over and creepage current distances of the
terminal board connection bolts shorten; this can result in winding and
terminal board damage.
Make sure that the suction and pressure line shut-off 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.
8.5 Refrigerant charge
CAUTION Wear personal protective clothing such as goggles and protective
gloves!
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.
8.6 Start-up
Check that the safety and protection devices (pressure switch, motor protection, electrical
contact protection measures, etc.) are all functioning properly.
Switch on the compressor and allow to run for a minimum of 10 min.
Check the oil level by : The oil must be visible in the sight glass.
WARNING Ensure that both shut-off valves are open before starting the
compressor!
ATTENTION If larger quantities of oil have to be topped up, there is a risk of
oil hammer effects.
If this is the case check the oil return!
8 | Commissioning