34 Installation and maintenance instructions ecoTEC sustain 0020253094_051▶ Regulate the pressure using the adjusting screw (1).Position of theadjusting screwPres-surein MPa(mbar)Notes/applicationRight-hand stop(turned all theway down)0.035(350)If the radiators do not heatup sufficiently at the defaultsetting. In this case, youmust set the pump to themaximum speed.Mid-position (sixanti-clockwiserotations)0.025(250) Default settingFive further anti-clockwise rota-tions starting fromthe mid-position0.017(170)If noises are produced inthe radiators or radiatorvalves▶ Install the front casing.10.7 Setting the domestic hot water temperatureDanger!Risk of death from legionella.Legionella multiply at temperatures below60 °C.▶ Ensure that the end user is familiar withall of the Anti-legionella measures in orderto comply with the applicable regulationsregarding legionella prevention.1. Set the domestic hot water temperature.Condition: Water hardness: > 3.57 mol/m³– Domestic hot water temperature: ≤ 50 ℃2. Descale the water as required.3. Observe the applicable regulations regarding legionellaprevention.11 Handing over to the end user▶ At the time of commissioning complete all relevant sec-tions of the Benchmark commissioning checklist, locatedat the rear of this document.▶ For IE: Complete a “Declaration of Conformity” to indicatecompliance to I.S. 813. An example of this is given in thecurrent edition of I.S. 813.▶ When you have finished the installation, affix the en-closed sticker (which requests that the user reads theinstructions) to the front of the product in the end user'slanguage.▶ Draw attention, to the current issue of the Gas Safety(Installation and Use) Regulations, Section 35, whichimposes a duty of care on all persons who let out anyproperty containing a gas appliance in the UK.▶ Explain to the end user how the safety devices work andwhere they are located.▶ Inform the end user how to handle the product.▶ In particular, draw attention to the safety warnings thatthe end user must follow.▶ Inform the end user that they must have the productmaintained in accordance with the specified intervals.▶ Pass all of the instructions and documentation for theproduct to the end user for safe-keeping.▶ Inform the end user about measures taken to ensurethe supply of combustion air and flue gas guiding, andinstruct the operator that he must not make any changes.▶ Inform the end user that they must not store or use explo-sive or highly flammable substances (such as petrol, pa-per or paint) in the installation room of the product.▶ Complete and sign off the Benchmark commissioningcheck list.▶ Complete and sign off the guarantee documentation.