Maintenance & Repair; General Considerations; Qualification Of Workers - Emerson Copeland EazyCool ZX Series Application Manuallines

5 Maintenance & repair
5.1

General considerations

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.
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 atmosphere! Fire hazard!
When opening the system, the atmosphere could be flammable. 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 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 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.
In case of failure, switch the unit off remotely via the additional circuit breaker
if available.
A risk analysis to evaluate all possible risks shall be carried out by the service technician before any
repair work.
5.2

Qualification of workers

CAUTION
Non-qualified personnel! Improper maintenance! Only qualified and
trained personnel can service or undertake work on units using flammable
refrigerant.
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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