Emicon RAH - Leak Detection; Safety Pressure Switches Check; Safety Valves Check; Fluid to be Cooled Check

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___________________________________RAH / PAH Ka_________________________________
CASE
Sight Inspection
(par. 4.2, p.ti a - l)
Pressure test leak detection
A
X X X
B
X X X
C
X X
D
X X
A
Inspection, after an intervention, with possible effects on the mechanical resistance or after a change of purpose or after a stop longer
than 2 years; all unt components must be replaced. Do not carry on checks with higher pressures than design one.
B
Inspection following an intervention, or a relevant modication of the system or its components. The check can be restricted to the com-
ponents involved in the intervention, but if a refrigerant leak is detected, a leak detection must be made on the all system.
C
Inspection following a change of the unit position. If there could be consequences on the mechanical resistance, refer to point A.
D
Refrigerant leak detection after a justied suspicious. The system must be checked to nd any leaks, using direct measures (devices able
to nd the leak) or indirect ones (deduction of the leak presence analysing the operational parameters), focusing attention on those parts
which are more easily exposed to leaks (junctions, for example).
If it is detected a failure compromising the reliable unit operation, the unit cannot be restart before it will be solved.
5.1.1 LEAK DETECTION
If no further precautions are required, carry on a tightness test on the unit at least every three months (for units installed in the European Community, leakage
detection must be carried out in compliance with indications stated in the (EC) Regulation1516/2007).
If, during the test, there is the suspicious that there may be a refrigerant leak (for instance, after a reduction of cooling capacity or after superheating or sub-cooling
measurements), nd it using appropriate instruments, repair it and carry out another tightness check, in compliance with current national laws.
The results of the checks and taken measures must be recorded on the Register.
The personnel involved in the refrigerant leak detection must not use open ames or source of ignition.
Refrigerant leaks must be found and repaired as soon as possible by qualied personnel, as required by current local laws and regulations.
5.1.2 SAFETY PRESSURE SWITCHES CHECK
Without any more restrictive local regulations, the safety high pressure switches must be inspected on site at least every twelve months, to check that they are well
regulated and work properly, as well as installed according to applicable laws.
5.1.3 SAFETY VALVES CHECK
Without any no more restrictive local regulations, external safety valves must be inspected on site at least every twelve months, to check their tightness. If a leak is
detected, the valve must be replaced.
Valves must be inspected every ve years, to check that they are in good conditions, that the calibration pressure printed on the valves themselves is readable, that
they are installed and have proper features to grant the system safety, in compliance with current regulations.
5.1.4 FLUID TO BE COOLED CHECK
The uid of the refrigerant/liquid exchanger must be inspected at least every six months, to check its composition and identify the presence of any refrigerant in it.
5.1.5 NOISE AND VIBRATION CHECK
Check, at least once a month, that the unit does not make unusual noises, and that piping does not vibrate abnormally, because this may damage it.