54
Ground the installation:
• Check the conditions of the electrical wirings and connections, with special care
to the ground wire; replace eventual damaged parts.
• Check the system for leakages with leak detector suitable for the refrigerant
used on the system and having a sensitive of at less than 3 g/year.
• Remove the protective shield to access the compressor.
• Remove the compressor terminal covers and disconnect all the compressor
electrical components.
Recover the entire refrigerant charge before removing the compressor (if the line
tubes are cut when the system contains even fractions of the refrigerant charge.
it will cause a rapid release of refrigerant mixed with oil, with pollution to the
environment and possible injury due to inhalation of gas or frostbite).
To recover the refrigerant use a suitable recovery units and apparatus, follow the instruction of the producers
and the applicable regulations.
The only acceptable practices on refrigerant removed from systems are recovery,
reuse, recycling and reclamation. All the applicable standards and regulations for
these operations must be followed.
Avoid venting refrigerants in the ambient. In several countries there are legal obligations on technicians to
prevent this incorrect operation and to act minimizing leaks and repair systems with leaks as soon as possible.
To remove the refrigerant:
• Refrigerant has to be recovered from both high and low pressure sides. Connect
the hose (with Schrader connection) to the recovery unit in order to start the
refrigerant recovery procedure.
• Use a filter dryer at the entry of the recovery unit.
• Adhere the instructions of the recovery machine producer. Go down with recovery
up to a residual pressure of 0.3 abs bar (make reference to EC 842 or equivalent
applicable regulations).
• Be careful not to exceed the maximum charge indicated on the recovery vessel
for the specific refrigerant. Overcharges can lead to vessel explosion.
• Unsolder the line tube from the compressor.
• Remove the compressor from the installation base plate, follow the instruction
of Chapter
12
• In case the compressor has to be returned to Embraco, follow the instruction of
Chapter
13
• Purge the system using OFDN (oxygen-free-dry-nitrogen) only.
CAUTION
CAUTION
