Maintenance & Repair; Qualification Of Workers - Emerson Copeland Scroll YH04K1E Application Manuallines

6 Maintenance & repair
WARNING
Conductor cables! Electrical shock! 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 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 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 atmosphere! Fire 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 being used is suitable
for use with 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 maintenance, repair and decommissioning 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...
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