Nimbus M NET R32 Hybrid Installation Manual UK

Commissioning 6.

Commissioning 6. Commissioning 6.1 Preliminary operations Boiler settings For all boiler models: – Select parameter 2.2.7 Hybrid boiler and set the "active" value. System boiler settings For a System boiler with a calorifier probe, perform the following operations: – Remove the three-way valve cabling while the appliance is running in heating mode. – Disconnect the boiler’s calorifier probe (if present). – Connect the calorifier probe (if present) to the electrical panel of the hybrid module. – Select parameter 2.2.8 Boiler version and set the value “Ext Storage with Thermostat”. 6.2 Checking for electrical dispersions and gas leakages 6.3 Preliminary checks OUTDOOR UNIT – The unit must be positioned on a sturdy and perfectly horizontal base, in a place that is easily accessible for subsequent maintenance operations. – If there are significant air draughts, a protective screen must be fitted. – There must not be any obstacle hindering the flow of air. – The supporting structure must be able to withstand the weight of the outdoor unit. – If the installation site is subject to frequent snowfalls, the outdoor unit must be positioned at least 200 mm above the usual snowfall level. INDOOR UNIT – The unit must be positioned in an enclosed space and in a place easily accessible for subsequent maintenance operations. – The unit must be anchored firmly to the floor. 6.2.1 Electrical safety checks Upon completing the installation, check that all the power cables have been installed in conformity to the relevant national and local regulations and according to the instructions contained in the installation manual. PRIOR TO THE OPERATIONAL TEST Check the integrity of the earthing circuit. Measure the earth resistance using a specific tester. The earth resistance must be below 0.1 Ω. DURING THE OPERATIONAL TEST Check for electrical dispersions. During the functional test, carry out a complete electrical check, e.g. with the help of a multimeter, in order to identify any electrical dispersions. If an electrical dispersion is detected, switch off the unit immediately and contact a qualified electrician to identify and solve the cause of the problem. a All electrical connections must be made by an authorised electrician in conformity to the national and local electrical standards. 6.2.2 Check for gas leakages If a leak detector is used, follow the instructions contained in the user manual of the device. 40 / EN

Commissioning HYDRAULIC CONNECTIONS – The water supply distribution network pressure must never exceed 0.5 MPa (5 bar), otherwise a pressure reducer must be installed on the system’s intake. – The system must be filled to less than 0.3 MPa (3 bar), recommended pressure 0.12 MPa (1.2 bar). – The system must be airtight. – The circuit filling pipes and the pipes reaching the heating/cooling and domestic hot water systems (where present) must be correctly connected. – The expansion vessel supplied must be pre-charged to 0.1 MPa (1 bar) and must have an adequate capacity for the system. – The safety valves must be connected correctly to the silicone pipes supplied. – If an under-floor system is being installed, a safety device must be fitted on the heating delivery circuit. ELECTRICAL CONNECTIONS – The electrical connections must match the wiring diagrams appearing in the installer manual and must be made correctly. – The mains voltage and frequency must match the date shown on the rating plate. – All cables and parts must be designed according to the power consumption that occurs in the installed unit (see data plate). – The mains power connection must be made using a fixed mount and must include a two-pole switch. – The earthing system must be correct and must be connected first. – The overcurrent protection devices, residual-current circuit breakers and thermal cut-outs leaving the electrical enclosure must be installed correctly and in conformity to all the applicable regulations. – The residual-current devices and safety switches must be installed with the correct size. 6.4 Initial start-up a i To guarantee safety and correct operation of the system interface, it must be commissioned by a qualified technician in possession of the skills as required by law. The minimum water temperature value in heating mode for system operation is 20°C. Without back-up energy sources, if the water temperature is below 20°C there could be problems with the machine start-up. 6.4.1 Start-up procedure – Insert the system interface on the connection slide pushing it gently downwards. After a brief initialisation, the device will be ready for being configured. – The display screen shows “Select language”. Select the desired language by rotating the selector. – Press the selector . – The display shows the “Date and Time”. Turn the selector to select day, month and year. For each selection, always press the selector to confirm. Once the date has been set, the selection shifts to the time setting. Turn the selector to set the exact time, press the selector to confirm and move to the minute selection and setting. Press the selector to confirm. – Once the date is set, the selection moves to the daylight saving time setting. Turn the selector to select AUTO or MANUAL. If you want the system to automatically update the period when daylight saving time is in use, select AUTO. – Press the selector . NOTE: The display is set by default with a multi-level set-point time schedule. If a message appears concerning the time schedule conflict: – On the home page press the “Menu” button to access the user menu. – Turn the selector to select the “Advanced settings” menu, then press the selector . – Turn the selector to select the “Type of service of the schedule programme”, then press the selector . – Turn the selector and select the same value (Two-Level Set-Point or Multi-Level Set-Point) present in the other User Interfaces (see technical parameter 0.4.3 on the boiler interface, if available) and press the selector . – If there is still a conflict, repeat the procedure and use the selector to choose the two-level set-point, then press the selector . 41 / EN