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Installation Procedure
2
Be sure to use an insulator thick enough to cover the
refrigerant tube to protect the condensate water on the
outside of the pipe falling onto the floor and to improve
the efficiency of the unit.
3
Cut off any excess foam insulation.
4
Make sure that there are no cracks or waves on the bent
area.
5
It would be necessary to double the insulation thickness
(10 mm or more) to prevent condensation even on the
insulator when if the installed area is warm and humid.
6
Do not use joints or extensions for the pipes connecting
the indoor and outdoor units. The only permitted
connections are those for which the units are designed.
CAUTION
•
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-
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.
•
If the pipes require brazing, make sure that oxygen free
nitrogen (OFN) is flowing through the system.
•
Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
14
English
Step 9 Performing the gas leak test
To identify potential gas leaks on the indoor unit, inspect the
connection area of each refrigerant pipe using a leak detector
for R-32.
Before recreating the vacuum and recirculating the refrigerant
gas, pressurize the whole system with nitrogen (using a
cylinder with a pressure reducer) at a pressure above 4 MPa in
order to immediately detect leaks on the refrigerant fittings.
Made vacuum for 15 minutes and pressurizing system with
nitrogen.
Insulator
Step 10 Insulating the refrigerant pipes
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 Acrylonitrile
Butadien Rubber separately around each refrigerant pipe.
No gap
NBR
NOTE
•
Always make the seam of pipes face upwards.
Gas side
Liquid side
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