Vaillant geoTHERM VWS Installation Instructions Manual

Also see for geoTHERM VWS: Operating manual Installation instructions Operating manual

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Vaillant geoTHERM VWS Installation Instructions Manual Manual pdf 20 page image

Installation instructions geoTHERM VWS/VWW 0020051574_0120h NoteThe brine expansion tank has a capacityof approx. 6 litres and is therefore ade-quate for brine circuits up to a maximumof 1900 litres.If a flat collector is used the capacity ofthe brine expansion tank supplied willnot be sufficient. If the annual tempera-ture fluctuation in the soil is greaterthan 8 K, the brine will expand by morethan 6 litres which means that in thiscase the customer will need to select alarger brine expansion tank. A larger ex-pansion tank will also be required if theoverall quantity of brine in the systemexceeds 1900 litres.a Caution!The screw couplings on the brine expan-sion tank must be sealed with hemp.Sealing with, e.g., teflon tape can lead toleaks in the brine circuit.42aFig. 4.12 Installing the expansion relief valveØ 150 mmØ 10 mmRp 1/257Fig. 4.13 Mounting the brine expansion tank on the wall• Fit the bracket for the brine expansion tank to thewall using the wall plug and the screw.• Unfasten the pre-assembled connection pieces fromthe brine expansion tank (57).• Wind hemp into the outer threads of the connectionpieces.• Fit the first connection piece to the 3 bar expansionrelief 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 reliefvalve to the brine expansion tank.• Fit the brine collecting tank (65) to the expansion re-lief valve (42a) at zero pressure.The brine collecting tank must not be completelyclosed, as otherwise the functioning of the expansionrelief valve is not guaranteed.• Provide all the pipes with vapour-proof thermal insula-tion. The accessory kit contains the insulating matprovided for the thermal insulation of the connectionplate.4.10.3 Assembly of the well system (VWW only)With water as the heat source, the well system is inmost cases implemented with a suction and injectionwell. The customer-side well pump (immersion pump)should be fitted in the suction well. In so doing, followthe installation and assembly instructions for the im-mersion pump. See Chap. 6.4. for the electrical connec-tions of the immersion pump4 Assembly and installation