Maintenance & Repair; Qualification Of Workers; Preparation And Work Procedure - Emerson Copeland YB56K1G Application Manuallines

6 Maintenance & repair
WARNING
Conductor cables! Electrical shock hazard! Follow the lockout/tag out
procedure and the national regulations before undertaking any maintenance
or service work on the system.
Use compressor with grounded system only. Screwed electrical connections
must be used in all applications. Refer to original equipment wiring diagrams.
Electrical connections must be made by qualified electrical personnel.
WARNING
Ignition source in a potentially flammable or explosive atmosphere! Fire
and explosion hazard! When opening the system, the atmosphere could be
explosive. All the electrical components that are a source of ignition must
always be switched off during service and maintenance. Ensure that the
surface temperatures of the components never exceed the limits set by the
applicable safety standard, eg, EN 378-2.
Air/flammable refrigerant mixture! Fire and explosion hazard! Remove all
of the refrigerant before opening the system. Make sure to remove refrigerant
completely from all components such as heat exchangers, refrigerant
accumulators, etc. Flush the system and the components with inert gas before
undertaking any work and before brazing.
WARNING
Open flame in a potentially flammable or explosive atmosphere! Fire and
explosion hazard! The area shall be checked with an appropriate refrigerant
detector prior to and during work, to ensure the technician is aware of a
potentially toxic or flammable atmosphere. Ensure that the leak detection
equipment is suitable for all applicable refrigerants.
Personnel performing work on a refrigeration system that involves exposing
the pipework shall avoid using any ignition source in a way that could lead to
a fire or explosion hazard. All sources of ignition shall be kept sufficiently far
from the site of installation, repair, removal or disposal during the entire time
when refrigerant could be released into the surrounding space.
Open flames and smoking are strictly forbidden at all times.
During service make sure that:
- the area is well ventilated;
- the materials and equipment used are suitable for use under flammable
conditions;
- only non-sparking tools are used;
- antistatic gloves and clothes are used;
- build-up of electrostatic charges is avoided;
- no unshielded or naked flame is used.
If parts of the refrigeration system are charged with flammable refrigerant,
make sure that all the valves are tightly closed and that the open pipes after
the valves are free of refrigerant and oil.
A risk analysis to evaluate all possible risks shall be carried out by the service technician before any
repair work.
6.1

Qualification of workers

Personnel working on the maintenance, repair and decommissioning of the system shall be
adequately trained. Any work procedure affecting safety shall only be executed by qualified and
trained personnel in compliance with national or other equivalent certification systems.
Examples of such work procedures are breaking into the refrigerating circuit, opening sealed
components, opening ventilated enclosures, etc...
6.2

Preparation and work procedure

A work procedure shall be provided in the preparation stage. All personnel working at the site,
whether maintenance or other, shall be instructed on the nature of the work being carried out.
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