Vaillant geoTHERM Installation Instructions Manual

Also see for geoTHERM SERIES: System Installation Instructions Installation and servicing Instructions for use Operating instructions

Contents

Hydraulics installationInstallation instructions geoTHERM 0020051574_04 37542a15.11 Fitting the expansion relief valve> Seal the outside thread of the upper connecting piece (1)using a sealant, e.g. Teflon tape.> Fit the connecting piece to the 3 bar expansion reliefvalve (42a) that is attached to the heat pump.> Fit the upper connecting piece with the expansion reliefvalve to the brine expansion tank.> Use the bracket to fix the brine expansion tank.> Connect a hose/pipeline to the expansion relief valve.Allow the end of the hose to be open in the brine collect-ing tank.> Install the brine expansion tank (65) (¬ Fig. 5.9) withoutpressure on the expansion relief valve (42a).The brine collecting tank must not be completely closedbecause, otherwise, it cannot be guaranteed that theexpansion relief valve will work.5.10 Connecting the heat pump to the well watercircuit (VWW only)In most cases, if well water is used as the heat source, thewell system must be run using suction and injection wells.The ends of the pipelines of the suction and injection wellsmust lie deep enough below the well water surface to pre-vent the water from taking in oxygen from the air. This oxy-gen leads to the coagulation of iron and manganese that isdissolved in the water and this, in turn, may lead to depositsin the injection well and the heat exchanger in the heatpump.> In the suction well, install the well pump (immersionpump) that must be installed on-site. Follow the wellpump installation and assembly instructions in thisrespect.The electrical connection for the well pump is described in(¬ Ch. 7.3.4).> Fit the well water pipelines along with all the associatedcomponents in accordance with the applicable technicalguidelines.b Caution!Risk of damage caused by solid particles.Solid particles (e. g. sand) in the well watermay clog the evaporator.> In the inflow to the heat pump,install a flushable fine filter(mesh width 100 - 120 mm).> Connect the well water pipelines to the heat pump (3)and (4) (¬ Fig. 5.8).> Insulate all pipelines using vapour diffusion-tight insula-tion.b Caution!Risk of damage caused by negative pres-sure.Negative pressure in the well water pipe-lines may cause damage to the flexiblehoses within the heat pump.> Ensure that there cannot be any nega-tive pressure in the pipelines when oper-ating and after switching off the wellpump.