9
Purging the unit
From factory the unit is supplied and set with a pre-charge of nitrogen gas. (insert gas) Therefore, all insert gas must be purged
before connecting the assembly piping.
Unscrew the pinch pipe at the end of each refrigerant pipe.
RESULT : All inert gas escapes from the indoor unit.
• To prevent dirt or foreign objects from getting into the pipes during
installation, do NOT remove the pinch pipe completely until you are
ready to connect the piping.
• Connect the indoor and outdoor units using pipes with flared
connections(not supplied). For the lines, use insulated, unwelded,
degreased and deoxidized copper pipe (Cu DHP type to ISO 1337 or
UNI EN 12735-1), suitable for operating pressures of at least 4200kPa
and for a burst pressure of at least 20700kPa. Copper pipe for hydro-
sanitary applications is completely unsuitable.
• For sizing and limits (height difference, line length, max. bends,
refrigerant charge, etc.) see the outdoor unit installation manual.
• All refrigerant connection must be accessible, in order to permit either
unit maintenance or removing it completely.
The designs and shape are subject
to change according to the model.
G_1
Gas refrigerant port
Liquid refrigerant port
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