Nimbus Plus S NET R32 Installation Manual UK

Electrical connections

Electrical connections – Open the internal panel (3) to access the housing (4). – Pass the BUS cable (8) through the hole (9) on the electrical panel. 3 8 9 4 Fig. 90 – Position the Light Gateway (5) in the housing (4) and close the panel (3). 3 Fig. 93 – Connect the BUS cable (8) to the Light Gateway (5) respecting the polarity. – Connect the second BUS cable (10) which must be connected to the system interface. 5 4 5 Fig. 91 10 8 – Detach the clips (2) and open the cover (3). Fig. 94 3 – Install the system interface onto the device (refer to the paragraph "On-board installation"). 2 Fig. 92 50 / EN

Commissioning 6. Commissioning 6.1 Checking for electrical dispersions and gas leakages 6.1.1 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. 6.1.2 Check for gas leakages If a leak detector is used, follow the instructions contained in the user manual of the device. – Check for any leakages from the joints made. AFTER THE GAS LEAKAGE CHECK After verifying that the joints of the pipes do NOT leak, put the valve caps back onto the outdoor unit (refer to the paragraph " Vacuum operation"). 6.2 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 or wall. – If the user interface is installed on the appliance, check that the relative humidity in the installation room does not exceed the allowed limit. GAS CONNECTIONS a This procedure must be done by a qualified technician, in compliance with the requirements of the F-Gas regulations. – There must not be any excessive or overly tight bends in the pipes connecting the indoor and outdoor units. – The minimum and maximum lengths for the refrigerant pipes must be observed. – The flaring must conform to the regulations. – The air from the circuit must be purged using a vacuum pump and the vacuum must be maintained for a few seconds. – If the pipes connecting the indoor and outdoor units are longer than 15 m (120 S, 120 S-T, 150 S, 150 S-T) / 20 m (35 S, 50 S, 80 S, 80 S-T), an additional amount of refrigerant gas must be charged. – The pipes must be sealed in the installation is carried out at a later stage. – The valves for charging the circuit must be open. 51 / EN