Evacuation Of Refrigerant Before Servicing; Leak-Tightness After Servicing; Evacuation After Servicing; Start-Up After Servicing - GEA Grasso 5 Installation And Maintenance Instructions Manual

INSPECTION AND TROUBLE SHOOTING
EVACUATION, LEAK TESTING AND START-UP OF THE COMPRESSOR/PACKAGE
Always use a vacuum pump or pump-down unit to evacuate the refrigerant from
the compressor.
2.5.1

EVACUATION OF REFRIGERANT BEFORE SERVICING

Procedure to evacuate the compressor:
1.
2.
3.
4.
5.
6.
2.5.2

LEAK-TIGHTNESS AFTER SERVICING

The necessary safety precautions should be taken before carrying out the leak-
tightness test. To check leak-tightness use dry nitrogen at a positive pressure
which is less than the admissible operating pressure of the low pressure stage.
2.5.3

EVACUATION AFTER SERVICING

After the pressure test has been completed, the compressor (package) must be
evacuated and undergo a vacuum test. Evacuation is used to remove air and
moisture from the compressor (package)
2.5.4

START-UP AFTER SERVICING

1.
2.
3.
4.
5.
6.
7.
8.
9.
36
Switch off main control panel.
Remove main fuses.
Close shut-off valves.
Relieve refrigerant to atmospheric pressure, via the evacuation/purging
valve(s) as prescribed by local safety regulations. For the location of these
valves refer to the "Product Information".
Remove left-over refrigerant by means of a vacuum pump.
Drain the oil from the compressor and oil separator, oil return /oil rectifier
system if present.
STATUS: Compressor (package) is dried and still evacuated.
Charge the oil separator, if present, with oil.
See the appropriate Product Information for the correct quantity.
Charge the compressor crankcase with oil via the oil charge valve until the
minimum level is seen at the sight glass at the level as indicated in IMM.
It is mandatory to pre-lubricate the oil circuit by adding the final quantity of oil
(via the charge valve mounted onto the oil pump by means of a separate oil
filling pump, OR via an external oil pump). The required oil level is indicated in
the IMM.
Re-install all accessories such as coupling, V-belt guard etc.
Open the shut-off valves.
Check the start-stop procedure.
Check all safeties and controls.
Re-install the main fuses.
Start up the compressor.
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07.04.2021