Operation and Maintenance Instructions
Envicooler
2001-03-09
Page 11
Air handling with the focus on LCC
5.2 Searching for Leakage
A search to detect leakage in the system should be made at least once per calendar
year as a preventive measure. This leakage search should be recorded and entered
in the journal.
The cooling system can develop a leak. This becomes apparent first by impaired cool-
ing performance or the system won’t operate at all due to a momentary leakage.
If you suspect refrigeration leakage, check the level of refrigerant in the sight glass of
the system. The sight glass is located in the fluid pipe by the refrigerating machine.
If you see bubbles continuously forming in the sight glass, and the cooling perform-
ance of the system is at the same time poor, the probable cause is that the system is
leaking. If you see one or two or just a few bubbles in the sight glass when the ma-
chine starts up, and notice that it operates with reduced output or operates normally
does not necessarily mean that the refrigerant volume is too low.
IF BUBBLES APPEAR IN THE SIGHT GLASS AND THE PERFORMANCE OF THE
SYSTEM IS NOTICEABLY BAD – CALL AN AUTHORISED SERVICE REPRESEN-
TATIVE FOR HELP
.
Keep in mind that refrigerant must not be released into the atmosphere and that es-
caping refrigerant can cause burns if it comes into contact with skin. If it becomes nec-
essary to make modifications in the refrigerant circuit, the staff doing this work must
wear the proper protective equipment.
MODIFICATIONS IN THE REFRIGERANT SYSTEM MUST ONLY BE CARRIED
OUT BY AN ACCREDITED INSPECTORATE
– A COMPANY WITH A REQUIRED
PERMIT –
