Vaillant geoTHERM Installation Instructions

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.

Vaillant geoTHERM Specifications

General

Brand	Vaillant
Model	geoTHERM
Category	Heat Pump
Language	English