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equipment during service, then a permanently operating form of leak detection
should be placed at the most critical point to warn of a potentially hazardous
situation.
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Particular attention must be paid to the following to ensure that, when working
on electrical components, the housing is not altered in such a way as to affect
safety. This must include damage to cords, an excessive number of connections,
terminals not conforming to the initial specification, damage to seals, incorrect
fitting of the stuffing box, etc.
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Ensure that the instrumentation is securely mounted.
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Ensure that seals or sealing materials have not degraded until no longer being
useful to preventing the penetration of flammable atmospheres. Spare parts
must be in accordance with the manufacturer's specifications.
NOTE: the use of silicone sealant may inhibit the effectiveness of some types of
leak-detection equipment. Intrinsically safe components do not have to be isolated
before work.
3. Repair of intrinsically safe components
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Do not apply any permanent inductive or capacitive load to the circuit without
ensuring that it will not exceed the permissible voltage and current rating for the
equipment in use.
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Intrinsically safe components are the only type of components that can be
worked on in a flammable atmosphere. The test instrumentation must have the
correct assigned features.
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Replace components only with parts specified by the manufacturer. Other parts
can ignite the refrigerant in the atmosphere from a leak.
4. Wiring
Verify that the wiring is not subject to wear, corrosion, excessive pressure, vibration,
sharp edges, or any other environmental effects. The verification should also consider
the effects of ageing or continuous vibration from sources such as compressors or
fans.
5. Detection of flammable refrigerants
Under no circumstances should potential ignition sources be used in the search for
or detection of refrigerant leaks. Do not use a halide lamp or any other detector
using a naked flame.
6. Leak-detection methods
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The following leak-detection methods are considered acceptable for systems
containing flammable refrigerants.
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Electronic leak detectors should be used to detect flammable refrigerants, but
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EVVO CLIMA 9000/12000/18000/24000
