Assembly Of The Heating System; Assembly, Brine Circuit - Vaillant geoTHERM VWS Installation Instructions Manual

4 Assembly and installation

4.12.1 Assembly of the heating system

a Caution!
Risk of damage!
In order to be able to clear any possible
overpressure, the heat pump must be
connected to an expansion vessel and an
expansion relief valve, at least DN 20
with a maximum opening pressure of
3 bar (not supplied).
H Danger!
Risk of scalding!
The blow-off line on the expansion relief
valve must be the size of the valve's
outlet aperture and be installed in a
frost-free environment. It must remain
constantly open. It must be fitted in
such a way that persons are not endan-
gered by hot water or steam when it
blows off.
We recommend the installation of a
Vaillant safety group and a tundish.
• Fit the heating flow and return lines with all compo-
nents.
• Insulate all the pipes.

4.12.2 Assembly, brine circuit

• Install the heat source pipes and all their associated
components.
65
K
49 49
61
Fig. 4.13 VWS heat source circuit
Key to Fig. 4.13
33 Air separator/Dirt filter
42a Expansion relief valve
49 Flow rate adjuster
57 Brine expansion tank
58 Filling and drainage tap
61 Brine circuit
65 Brine collecting tank
K Collector
20
42a
57
58 58
33
58
61
42a
57
Fig. 4.14 Fitting the brine expansion tank
h Note!
The brine expansion tank has a capacity
of approx. 6 litres and is thus adequate
for brine circuits up to a maximum of
1900 litres.
a Caution!
Material damage resulting from escaping
brine!
The screw couplings on the brine expan-
sion tank must be sealed with hemp.
Sealing with, e.g., teflon tape can lead to
leaks in the brine circuit.
• Fit the bracket for the brine expansion tank to the
wall using the wall plug and the screw.
• Unfasten the pre-assembled connection pieces from
the brine expansion tank (57).
• Wind hemp into the outer threads of the connection
pieces.
• Fit the first connection piece to the 3 bar expansion
relief valve (42a) enclosed with the heat pump.
• Using the second connection piece, fit the brine ex-
pansion tank (57) from the accessory kit to the pipe
(1) running from the heat source to the heat pump.
• Fix the brine expansion tank with the bracket.
• Fit the connection piece with the expansion relief
valve to the brine expansion tank.
• Fit the brine collecting tank (65) to the expansion reli-
ef valve (42a) at zero pressure.
The brine collecting tank must not be completely
closed, as otherwise the functioning of the expansion
relief valve is not guaranteed.
• Provide all the pipes with vapour-proof thermal insula-
tion. The accessory kit contains the insulating mat
provided for the thermal insulation of the connection
plate.
Installation instructions geoTHERM VWS 0020046310_01
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