What is the purpose of vacuum pump provided on board ship ? Is it safe to run the compressor without oil inside crankcase ? How do you know that all the air is vented ?
Gd question guys'. I' have the same to ask how is to possible to run compressor without oil in crankcase. At least is possible to fill up the oil by manual pump it's supposed to always on standby . Good luck, see yu in net . But the rest of all is ok.
Thank you for comment sir, it just a very simple method on how to purge air. During change oil the expose with air is crankcase of compressor and the system is safe for air mixture because the suction and delivery valve are closed. You can release air in the crankcase by crack open either suction or delivery valve then open the purging valve. Refrigerant gas pressure is higher than air pressure in crankcase so in this condition the refrigerant gas push the air out in the crankcase and to confirm that air is fully released the purging valve becomes frozen or cold.
@@NalugonEdward may case naba sa experience mo na nawala ang oil? Actually very rear na case yan, kon nangyary yan pumasok sa system ang oil mo you have problem sa oil seal
