21
Refrigerant piping
Fig. 26
m
CAUTION
Do not use or integrate existing pipes. The old
refrigerant and oil in the piping contain a large
amount of chlorine which will cause the fluid in
the new unit to deteriorate.
l
WARNING
Do not use solenoid valves to avoid the
backflow of oil.
4.1.1 Refrigerant piping connection
Remove the front panel in order
to: connect the refrigerant
piping, make the electrical connections and carry out
maintenance on the unit.
l
WARNING
Before connecting the pipes to the outdoor
unit, check that they do not contain water or
contaminants.
Flush the pipes with high pressure nitrogen,
do not use refrigerant from the outdoor unit
under any circumstances.
Fig. 27
l
WARNING
After connecting the pipes to the indoor
and outdoor units, charge with pressurised
nitrogen to perform a tightness test.
4.1.2 Connect the shut-o valves
Stop valve
The stop valves are closed when the unit is shipped from
the factory.
1
2
3
Fig. 28
1
Access for maintenance and cover of the valve
2
Cover of the stop valve
3
Connecting pipe of the stop valve
1
2
3
5
4
Fig. 29
1
Seal component
2
Axis
3
Access for maintenance
4
Cover of the stop valve
5
Hexagonal hole
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