23
Installation instructions geoTHERM VWS/VWW 0020051574_01
• Allow the filling pump (
67
) to run until fluid free of air
emerges from the hose connected to stop valve (
61
).
• Now open valve (
57
) so that the air between valves
(
61
) and (
62
) can escape.
• Close valve (
61
) and pressurise the brine circuit using
the filling pump (
67
). Take care that the pressure
does not exceed 3 bar.
• Now close valve (
62
) as well.
• Switch off the filling pump (
67
) and remove the filling
hose.
• Open the expansion relief valve (
60
) to allow any pos-
sible overpressure to discharge. The brine expansion
tank must be 2/3 full of fluid. Make sure that valve
(
61
) is closed.
• Fill any remaining brine fluid into a suitable container
(e.g. plastic canister) for topping up later and hand it
over to the user for safekeeping.
Further bleeding is carried out after the cladding sec-
tions have been fitted and the heat pump has been
started (see Chap. 7.4).
Check the filling level of the brine fluid
a
Caution!
Risk of damage!
The filling level is correct when the brine
expansion tank is 2/3 full. The installa-
tion can be damaged if the filling level is
too high.
• Top up the brine fluid when the filling level has fallen
so low that it is no longer visible in the expansion
tank.
1
2
Fig. 5.2 Filling level of the brine expansion tank
Key to Fig. 5.2
1 Filling level too low
2 Filling level correct
The filling level of the brine fluid can fall a little in the
first month following commissioning of the system; this
is quite normal. The filling level can also vary depending
on the temperature of the heat source, but under no cir-
cumstances should it fall so far that it is no longer visi-
ble in the expansion tank.
5.3
Well system (VWW only)
When using water as the heat source, it is not necessary
to fill the heat source system as it is an open system.
Filling the heating and heat source systems 5
