23
Performing leak test & insulation
Once you have checked that there are no leaks in the system,
you can insulate the piping and hose.
1
To avoid condensation problems, place
separately around each
refrigerant pipe.
Note Always make the seam of pipes face upwards.
2
Wind insulating tape around the pipes and drain hose
avoiding to compress the insulation too much.
3
Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4
The pipes and electrical cables connecting the indoor
unit with the outdoor unit must be fixed to the wall with
suitable ducts.
Discharge all the nitrogen to create a vacuum and
charge the system.
CAUTION
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating the
vacuum and recirculating the R22, it’s responsible of installer
to pressurize the whole system with nitrogen (using a pressure
regulator) at a pressure above 4.1MPa (gauge).
LEAK TEST WITH R22 (after opening valves)
Before opening valves, discharge all the nitrogen into the system
and create vacuum. After opening valves check leaks using a
leak detector for refrigerant R22.
The designs and shape are subject to change
according to the model.
No gap
NBR(T13.0 or thicker)
All refrigerant connection must be accessible, in order
to permit either unit maintenance or removing it
completely.
CAUTION
Insulation cover pipe
Indoor unit
Be sure to overlap
the insulation
CAUTION
Must fit tightly against body
without any gap.
Insulation pipe
A B
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