Nimbus M NET R32 Hybrid Installation Manual UK

Electrical connections

Electrical connections 5. Electrical connections a a Carry out the electrical connections after having completed all the hydraulic connections. After the outdoor unit is switched off, it is necessary to wait at least 5 minutes to switch it on again. The indoor and outdoor units must be powered separately by observing the indications of the table. Moreover, a ATG BUS-type connection must be made between the indoor and outdoor units. This connection can be made using a cable with reduced cross-sectional size (0.75 mm 2 recommended cross-sectional size). – It is forbidden to use hydraulic connection pipes and pipes of the space heating system to earth the system. – The manufacturer is not liable for any damage caused by a system with inadequate earthing or electrical system anomalies. – Connect the power supply cable to a 230 V- 50 Hz (1 ph) or 400 V - 50 Hz (3 ph) network, while verifying that the pole markings match and the connections to earth (see table). Electrical circuit – The electrical system must satisfy all the requirements of the law in force. – Check that the mains power supply voltage and frequency are in line with the data indicated on the system’s data plate (see table). – For greater safety, ask a qualified technician to perform a thorough check of the electrical system. – We recommend verifying the presence of surge protection devices (SPDs) in the power supply line, for satisfying the national standards in force (IEC 60364), and the presence of safety switches and residual-current circuit breakers in the electrical panels that supply the indoor and outdoor units separately. – For the machine’s power supply we recommend using properly sized disconnection devices in compliance with the applicable regulations. – The power supply connection is a type-Y system and the connection cable should only be replaced by a qualified technical support centre, in order to avoid any damages. – Check that the electrical installation is adequate for supporting the power consumption of the installed units, as indicated on the appliances’ data plate. – The electrical connections must be made with the help of a fixed support (do not use portable socket-outlets) and fitted with a bipolar switch, with a contact gap of at least 3 mm. – The system must be connected to an electrical system with an earthing device capable of ensuring the safety of the installation. 32 / EN

Electrical connections The cross-sectional size of the cables used must comply with the system power (see data plate). The cross-sectional size of the power cables indicated in the table must be regarded as the minimum cross-sectional -size. i Prior to accessing the terminals, all the supply circuits must be disconnected. OUTDOOR UNIT 35 M 50 M 80 M 80 M-T NIMBUS EXT R32 Rated current / live A 11,0 13,5 20,0 7,6 22,5 7,8 26,9 9,41 Maximum current / live A 11,7 14,3 21,3 8,1 23,9 8,3 28,7 10,0 Thermal cut-out size A C-16 C-20 C-32 C-13 C-32 C-13 C-32 C-13 Residual-current circuit breaker mA F-30 / B-30 B-30 F-30 / B-30 F-30 / B-30 (RCCB) size B-30 B-30 Surge current A < 3 Rated voltage F 230 230 230 400 230 400 230 400 Permissible voltage fields F 216- 243 216- 243 216- 243 376- 424 216- 243 376- 424 216- 243 376- 424 Cos phi > 0,9 Power supply wiring Reference H07RN-F Cable min. cross-sectional 3G4 3G4 3G4 5G2,5 3G6 5G2,5 3G6 5G2,5 size Max. diameter [mm] 14 16,2 16,2 17 17 17 18 18 Recommended cable 3G4 3G4 3G6 5G4 3G6 5G4 3G6 5G4 cross-sectional size Communication cabling Reference H05RN-F Cable cross-sectional 3 x 0,75mm 2 size Max. length 50 m The power supplies of the indoor and outdoor units must be connected respectively to a dedicated residual-current circuit breaker (RCCB) with a minimum threshold of 30 mA. For units equipped with an inverter (outdoor unit), we recommend using type B residual-current devices for 3 ph power supplies and type B or F devices (depending on the electrical system to which they are connected) for 1 ph power supplies. For units lacking an inverter (indoor unit), a type A residual-current device will suffice. The type of connection must nonetheless be made in a workmanlike manner by qualified personnel in order to comply with the national regulations in force. Main power supply table. INDOOR UNIT Power supply V - ph - Hz 230 - 1 -50 Permissible voltage fields F 196 ÷ 253 Nominal absorbed power W 6 Maximum current mA 140 Thermal cut-out A C-2 (4 A max) Residual-current circuit breaker (RCCB) mA A-30 size Power supply wiring Reference H05RN-F Cable cross-sectional size 3G0,75 Max. diameter [mm] 7 Communication cabling Reference H05RN-F Cable cross-sectional size 2 x 0,75 mm 2 EDF, AFR, PV signal cabling mm 2 H05RN-F 2 x 0,75 mm 2 Note: in making the connection between the communication cable from the indoor unit to the outdoor unit, use a shielded cable to prevent interference problems. 120 M 120 M-T 150 M 150 M-T 33 / EN