Maintenance & Repair; Qualification Of Workers - Emerson Copeland Scroll YBVH021 1U-3E9 Application Manuallines

6 Maintenance & repair
WARNING
Conductor cables! Electrical shock! Follow the lockout/tag out procedure
and the national regulations before carrying out 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.
All electrical components could be a source of ignition and must always be
switched off during service and maintenance.
WARNING
Air/flammable refrigerant mixture may create a potentially flammable
atmosphere! Fire hazard! Remove all refrigerant before opening the system.
Make sure to remove refrigerant completely from all components, such as heat
exchangers, refrigerant accumulators and so on. 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 and during
work, to ensure the technician is aware of potentially toxic or flammable
atmospheres. Ensure that the leak detection equipment being used is suitable
for use with all applicable refrigerants.
No person carrying out work in relation to a refrigeration system which involves
exposing any pipe work shall use any sources of ignition in such a manner
that it may lead to the risk of fire or explosion. All possible ignition sources,
shall be kept sufficiently far away from the site of installation, repairing,
removing and disposal, during which refrigerant can possibly be released to
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 allowed
- if parts of the refrigeration system are charged with flammable refrigerant,
be 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 executed by the service technician before any
repair work.
6.1

Qualification of workers

The working personnel for maintenance, repair, and decommissioning shall be adequately trained.
Every working procedure that affects safety means shall only be carried out by competent personnel
according to national or other equivalent certification systems.
Examples of such working procedures are:
▪ breaking into the refrigerating circuit;
▪ opening sealed components;
▪ opening ventilated enclosures.
C6.2.38/0719/E 27