111
7. Close the 3-way ball valve from the outdoor unit
flow (indoor unit heating water inlet) in the direction
of the fill hose. The flow direction from the outdoor
unit to the indoor unit remains open.
Remove the fill hose.
8. Check the internal and on-site hydraulic connec-
tions for leaks.
Recommended test pressure: 2 to 2.5 bar (0.2 to
0.25 MPa)
Danger
There is a risk of electric shock from escap-
ing heating water or DHW.
Check all water side connections for leaks.
!
Please note
Leaking hydraulic connections lead to appli-
ance damage.
■
Check the internal and on-site hydraulic
connections for leaks.
■
In the event of leaks, switch off the appli-
ance immediately. Drain the heating water.
Check the seating of seal rings. Always
replace displaced seal rings.
9. Thermally insulate the hydraulic connections.
Activate system pressure function
To activate this function, start the commissioning assis-
tant.
See page 99.
Venting the system
1. In the commissioning assistant, the "Venting"
function can be started directly after filling:
Confirm the query "Would you like to continue
with the venting program?" with .
2. Once the "Venting" function has started, the entire
system is automatically vented by means of the
quick-action air vent valve in the outdoor unit. The
quick-action air vent valve is on the float air vent
valve: See chapter "Overview of internal compo-
nents".
For this the 4/3-way valve moves through different
positions in turn.
3. The "Venting" function ends automatically.
The display shows the system pressure.
The venting process can take up to 20 min.
Note
In case of a large system pressure drop, restore
the system pressure: See chapter "Establishing
system pressure".
Activating the venting function
To activate this function, start the commissioning assis-
tant.
See page 99.
Commissioning, inspection, maintenance
Building up the system pressure (cont.)
6222080
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