6 Start-up16 Installation and maintenance instructions aroSTOR 0020285063_00▶ Remove the black protective cover from the PCB.▶ Connect the cable to the photovoltaic installation to con-nection terminal (1) on the PCB.▶ If your photovoltaic installation's control has two controlcontacts, connect it to the photovoltaic installation at con-nection terminal (1) and (2) on the PCB; see "Electronicsbox wiring diagram" in the appendix.– Connection terminal (1): Lower level of electricalenergy generated by the photovoltaic installation– Connection terminal (2): Upper level of electricalenergy generated by the photovoltaic installation5.3 Electrical installationOnly qualified electricians are allowed to carry out the elec-trical installation.Danger!Risk of death from electric shock!The mains connection terminals L and N re-main live even if the product is switched off.▶ Switch off the power supply.▶ Secure the power supply against beingswitched on again.Danger!Risk of death from electric shock!The condensers are still charged even hoursafter the power supply was disconnected.▶ Wait until the condensers havedischarged.The product's power supply must not be interrupted by atimer.5.3.1 Carrying out the wiring20 mm max.1. Guide the extra-low and low-voltage cables throughdifferent grommets on the rear of the product.2. Ensure that the inner conductors' insulation is not dam-aged when stripping the outer sheathing.3. Remove max. 20 mm of insulation from the cables.NoteIf cables are stripped by more than 20 mm,you must secure them using cable ties.4. Fit the stripped ends of the conductors with crimp pinterminals to ensure a secure connection that is freefrom loose strands and to thus prevent short circuits.5.3.2 Connecting the cable for low-tariff or high-tariff load relief1. In order to keep the product's operating times as low aspossible during high-tariff periods of the power supply(where applicable), connect the electricity meter's con-trol contact.T degivT airT eauHPX4X3X5X22112. Remove the protective cover. (→ Page 11)3. Remove the black protective cover from the PCB.4. Remove the red bridge from the energy supply com-pany's connection terminal (1) (ESC contact).5. Run the cable through the grommet on the rear of theproduct and through the grommet on the rear of theelectronics box.NoteWhen doing so, ensure that the grommet isslit open as little as possible to prevent airescaping while the product is in operation.6. Use the plug (1) to establish the connection to the elec-tricity meter's control contact.– Twin-core cable: 0.75 mm²7. Inform the end user if the product is controlled via thelow-tariff contact, so that any programming of operatingtimes does not conflict with the high- and low-tariff peri-ods.6 Start-up6.1 Filling the hot water circuit1. Disconnect the product from the power grid.2. Open the highest domestic hot water draw-off point inthe installation.3. Open the stopcock upstream of the safety group on thecold water inlet.4. Fill the domestic hot water cylinder until water escapesat the highest draw-off point.5. Close the domestic hot water draw-off point.