3.4.3 Filling with gas
If additional lling is required, do it before
lling the hydraulic unit with gas. Refer to
paragraph "Additional lling", page 31.
- Remove the access plugs (A) from the valve controls.
- First of all fully open the liquid valve (small) and
then the gas valve (large) using an Allen (hex) key
(anti-clockwise direction) without using excessive
force against the stop.
- Quickly disconnect the hose from the Manifold.
- Ret the 2 original caps (be sure they are clean) and
tighten them to the recommended tightening torque
indicated in the table gure 22, page 27. A seal is
achieved in the caps only with metal to metal.
The outdoor unit does not contain any additional
refrigerant allowing the installation to be bled.
Bleeding by ushing is strictly forbidden.
3.4.4 Final sealing test
The sealing test must be carried out using a certied
gas detector (sensitivity of 5g/year).
Once the refrigeration circuit has been gassed as
described above, check that all the refrigeration
connectors are gas-tight (4 connectors). If the arings
have been made correctly, there should be no leaks.
If necessary, check the seal of the refrigeration valve
caps.
" If the event of a leak:
- Return the gas to the outdoor unit (pump down).
The pressure should not drop below atmospheric
pressure (0 relative bar read on the Manifold) so as not
to contaminate the recovered gas with air or moisture.
- Redo the connection,
- Restart the commissioning procedure.
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 30 -
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