IMPORTANT: Ensure all adequate safety measures are taken
for all these operations: use appropriate PPE (personal
protective equipment), comply with all applicable industry
and local regulations, and use common sense.
13.3 - Level 3 maintenance
Maintenance at this level requires specic skills, qualications,
tools and expertise. Only the manufacturer, his representative or
authorised agent are permitted to carry out this work.
This maintenance work relates to the following:
- Replacement of major components (compressor, water heat
exchanger),
- Operations on the refrigerant circuit (handling refrigerant),
- Modication of factory-set parameters (change of application),
- Movement or disassembly of the refrigeration unit,
- Any operation due to proven lack of maintenance,
- Any operation covered by the warranty,
- One or two leak detection operations per year performed by
qualied personnel using a certied leak detector.
- To reduce waste, the refrigerant and the oil must be
transferred in accordance with applicable regulations, using
methods that limit refrigerant leaks and pressure drops and
with materials that are suitable for the products.
- Any leaks detected must be repaired immediately
- The compressor oil that is recovered during maintenance
contains refrigerant and must be treated accordingly.
- Pressurised refrigerant must not be vented to the open air.
- If the refrigerating circuit must be opened, cap all openings
for a period of up to one day. If open for longer, blanket the
circuit with a dry, inert gas (e.g. nitrogen).
13 - STANDARD MAINTENANCE
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