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Piping installation
Installer reference guide
91
08CA + EHY EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
8.2.9 To connect the refrigerant piping to the indoor unit
1
Connect the liquid stop valve from the outdoor unit to the refrigerant liquid
connection of the indoor unit.
b
a
a
Refrigerant liquid connection
b
Refrigerant gas connection
2
Connect the gas stop valve from the outdoor unit to the refrigerant gas
connection of the indoor unit.
NOTICE
It is recommended that the refrigerant piping between indoor and outdoor unit is
installed in a ducting or the refrigerant piping is wrapped with finishing tape.
8.3 Checking the refrigerant piping
8.3.1 About checking the refrigerant piping
The outdoor unit's
internal
refrigerant piping has been factory tested for leaks. You
only have to check the outdoor unit's
external
refrigerant piping.
Before checking the refrigerant piping
Make sure the refrigerant piping is connected between the outdoor unit and the
indoor unit.
Typical workflow
Checking the refrigerant piping typically consists of the following stages:
1
Checking for leaks in the refrigerant piping.
2
Performing vacuum drying to remove all moisture, air or nitrogen from the
refrigerant piping.
If there is a possibility of moisture being present in the refrigerant piping (for
example, water may have entered the piping), first carry out the vacuum drying
procedure below until all moisture has been removed.
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