Vaillant geoTHERM VWS Series, Installation Instructions Manual

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Installation instructions geoTHERM VWS/VWW 0020057444_01
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5.2 Filling the brine circuit (VWS only)
The brine fluid consists of water mixed with a heat
transfer fluid concentrate. As an additive we recom-
mend propylene glycol (alternative: ethylene glycol)
with corrosion-inhibiting additives. A DN 40 collector
hose has a capacity of approx. 1 litre per continuous
metre.
The brine fluids that may be used differ greatly from re-
gion to region. Please find out about this from the au-
thorities responsible.
Vaillant only approves of operating the heat pump with
the following brine media:
– max. 30 % ethylene glycol/water
– max. 33 % propylene glycol/water
– potassium carbonate/water
– max. 60 % ethanol/water
Heat source
to the heat pump
Heat source
from the heat pump
66
64
58
62
59
60
29
57
61
67
65
Fig. 5.1 Brine circuit
Key to Fig. 5.1
29 Brine pump
57 Stop valve
58 Bleed valve
59 Brine expansion tank
60 Expansion relief valve
61 Stop valve
62 Stop valve
64 Stop valve
65 Brine collecting tank
66 Brine reservoir
67 Filling pump
a
Caution!
Environmental hazard!
Leakage of brine media must not result
in any contamination of the ground
water or the soil. Substances must be
selected that are non-toxic and biologi-
cally degradable.
h
Note!
Only fit the heat pump cladding sections
after the filling and subsequent bleeding
of the heating circuit.
5 Filling the heating and heat source systems