Filling the heating and heat source circuit
Installation instructions geoTHERM 0020051574_04
43
6
6.3.5 Building up pressure in the brine circuit
To operate the brine circuit without any problems, a fill
pressure of between 150 and 200 kPa (1.5 and 2.0 bar) is
required. The expansion relief valve discharges at 300 kPa
(3 bar).
>
If required, open all the other stop valves that are not
shown in (
¬
Fig. 6.3
)
.
>
Open the stop valve (
63
) (
¬
Fig. 6.3
) so that the air in
the pipeline between the stop valves (
61
) and (
62
)
(
¬
Fig. 6.3
)
can escape.
>
If required, open the stop valve (
64
) (
¬
Fig. 6.3
), which
can still be closed again due to any partial bleeding, so
that air in the pipeline between the stop valves (
70
) and
(
72
) (
¬
Fig. 6.3
)
can escape.
1
6.4 Füllstand des Sole-Ausgleichsbehälters prüfen
>
Close the stop valve (
61
) (
¬
Fig. 6.3
) and use the filling
pump (
67
) (
¬
Fig. 6.3
) to pressurise the brine circuit
until the brine expansion tank (
1
) is filled to no more
than two thirds of its capacity and the pressure does not
exceed 300 kPa (3 bar).
>
Now also close the stop valve (
62
) (
¬
Fig. 6.3
).
>
Switch off the filling pump (
67
) (
¬
Fig. 6.3
).
>
Open the expansion relief valve (
42a
) (
¬
Fig. 6.3
), in
order to allow any overpressure to escape if it is above
the required fill pressure of 200 kPa (2,0 bar) and below
the expansion relief valve’s operating pressure of
300 kPa (3 bar). The brine expansion tank must be two
thirds full of fluid.
>
If required, repeat the process.
>
Remove the hose from the stop valve (
62
).
The system is also bled after the heat pump is started up
(
¬
Ch.
8.1.4
and
¬
Ch. 8.1.5
).
>
If there is any brine fluid left over, store this in a suitable
container (e. g. a plastic canister) for subsequent replen-
ishment.
>
Label the container with the specifications regarding the
type of brine fluid and the set concentration.
>
Pass the container on to the operator to be stored.
>
Point out to the operator that there is a risk of injury
when handling brine fluid.
6.4
Filling the DHW tank, if required
>
Open the cold water inlet pipe to a connected
DHW tank.
>
Open a domestic hot water draw-off point.
>
Close the domestic hot water draw-off point as soon as
water escapes.
>
Then open all of the other domestic hot water draw-off
points until water escapes before closing them again.
