Vaillant geoTHERM SERIES Manuel d'installation télécharger pdf (Page 22)

Installation instructions geoTHERM VWS/VWW 0020057444_0122

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

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

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.

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

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Vaillant geoTHERM SERIES Manuel d'installation Page 22

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