Vaillant geoTHERM Installation Instructions Manual

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

Contents

Filling the heating and heat source circuitInstallation instructions geoTHERM 0020051574_04 396b Caution!Risk of material damage if the heatingwater is treated with unsuitable frost orcorrosion protection agents!Frost and corrosion protection agents cancause changes in the seals, noises duringheating and possibly subsequent damage.> Do not use any unsuitable frost or corro-sion protection agents.6.2 Filling and bleeding the heating circuitb Caution!The function will be impaired if the cir-cuit is not bled enough.Built-up air may lead to insufficient flowand there may be noises in the heating cir-cuit.> Ensure that the cylinder charging circuitof the DHW tank is also bled.> Open all thermostatic radiator valves in the heatinginstallation and, if required, open all other stop valves.> If a DHW tank has been connected, move the externalheating/cylinder charging diverter valve into the centreposition.> If required, move any other externally-installed divertervalves into the centre position.> Connect a filling loop to a tap.> To do this, remove the screw cap from the filling anddrain valve for the heating circuit and fix the free end ofthe filling loop to this.> Open the filling and drain valve for the heating circuit.> Slowly turn the tap on and fill with water until the pres-sure gauge (on-site) has reached a heating installationpressure of approx. 150 kPa (1.5 bar).> Close the filling and drain valve for the heating circuit.> Bleed the heating circuit at the locations provided forthis.> Check the heating circuit’s water pressure again(if required, repeat the filling procedure).> Remove the filling loop from the filling and drainvalve and put the screw cap back on.> Move all of the diverter valves into their initial position.6.3 Filling and bleeding the brine circuit(VWS only)6.3.1 Preparing the filling procedurea Danger!Risk of explosion and combustion!The brine fluid ethanol is extremely flam-mable, both as liquid and steam. A poten-tially explosive combination of steam/airmay accumulate.> Keep away from heat, sparks, nakedflames and hot surfaces.> Ensure that there is sufficient ventilationin the event of accidental release.> Avoid the accumulation of steam/air mix-tures. Keep brine fluid containers closed.> Observe the safety data sheet thataccompanies the brine fluid.a Danger!Risk of injury due to chemical burns!Brine fluids are harmful to health.> Avoid contact with the skin and eyes.> Do not inhale or swallow.> Always wear gloves and protective gog-gles.> Observe the safety data sheet thataccompanies the brine fluid.b Caution!The function will be impaired if the cir-cuit is not bled enough.Built-up air leads to significant efficiencylosses.> Ensure that the brine circuit is bledenough.b Caution!The function will be impaired if unsuita-ble brine fluids are used.> Only use the specified brine fluids.i To fill the brine circuit, you require a filling pumpthat can bleed the brine circuit at the same timeas it fills it. Vaillant recommends the Vaillant fill-ing device (mobile with dirt filter) or the Vaillantfilling pump.The individual steps of the filling and bleeding procedurewhen using the Vaillant heat pump brine filling unit aredescribed below. The brine filling unit allows you to carryout a preparatory partial bleed of the brine circuit and tofill and bleed in one operation.