Panasonic Aquarea WH-ADC0309J3E5 Planning And Installation Manual page 190

Installation
10. Open both the valves completely by using a hexagonal spanner (SW 4) so that the
11. Screw the valve caps back onto the valve spindles of the 2-way and 3-way valves.
12. Examine the connections for leakage.
Schematic representation of system evacuation
6
1 Hydrokit
2 Refrigerant liquid pipe
3 2-way valve, closed
4 Outdoor unit
5 3-way valve, closed
190
4. Close the valve on the low pressure side of the manometer station and switch off the vacuum
pump.
5. Recheck whether the measured value remains constant at -1 bar for 10 minutes.
Yes: In this case you can assume that the refrigerant circuit is tight and go directly to step 7.
No: In this case, there is presumably still a leakage in the refrigerant circuit. Remove the
leakage by performing step 6.
6. If the manometer display does not remain constant at -1 bar, first tighten the connections.
Then evacuate the system again as described above. If the measured value of -1 bar is still
not maintained, search and repair the leaking places and then again perform step 5, until the
refrigerant circuit is definitely tight.
7. If the manometer display shows -1 bar for 10 minutes, loosen the hose from the vacuum
pump and the service port of the 3-way valve.
8. Tighten the valve cap on the service port of the 3-way valve by means of a torque wrench
with a torque of 18 Nm.
9. Remove the valve caps on the valve spindles of the 2-way and 3-way valves.
refrigerant streams into the system. Check that the refrigerant quantity is sufficient, otherwise
top up with the required refrigerant quantity (→
40, →
p. 4.6.3.3 Technical Data (mono-bloc systems), p.
1
9
10
4.6.2.3 Technical Data (bi-bloc systems),
2
3
6
5
Lo Hi
8 7
6 Refrigerant discharge pipe
7 Manometer low-pressure side: CLOSED
8 Manometer high-pressure side: OPEN
9 Adapter of the vacuum pump
10 Vacuum pump
Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
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