26
AGL_Ref_ST_YFK1E_EN_Rev01
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
Explosive flame! Fire hazard!
Oil/refrigerant mixtures are highly flammable.
Remove all ref rigerant before opening the system. Avoid working with an
unshielded flame in a refrigerant-charged system.
WARNING
Ignition source in a potentially flammable atmosphere! Fire hazard!
When opening an A2L ref rigerant system, the atmosphere could be
f lammable. 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
saf ety standard, eg, EN 378-2.
Air/flammable refrigerant mixture! Fire hazard!
Remove all ref rigerant
bef ore 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 bef ore undertaking any work
and bef ore brazing.
WARNING
Open flame in a potentially flammable atmosphere! Fire hazard!
The area
shall be checked with an appropriate ref rigerant detector prior to and during
work on an A2L ref rigerant system, to ensure the technician is aware of a
potentially toxic or f lammable atmosphere. Ensure that the leak detection
equipment being used is suitable for use with all applicable refrigerants.
Personnel performing work on a ref rigeration system that involves exposing
the pipework shall avoid using any ignition source in a way that could lead to
a f ire or explosion hazard. All sources of ignition shall be kept sufficiently far
f rom the site of installation, repair, removal or disposal during the entire time
when ref rigerant could be released into the surrounding space.
Open f lames 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 f lammable
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 ref rigeration system are charged with f lammable ref rigerant,
make sure that all the valves are tightly closed and that the open pipes after
the valves are f ree of refrigerant and oil.
A risk analysis to evaluate all possible risks shall be carried out by the service technician before any
repair work on an A2L system.
