Nimbus Compact M NET R32 Installation Manual UK

Electrical connections

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 M EXT R32 Rated current / live A 11,0 13,5 20,0 7,6 22,5 9,0 26,9 11,0 Maximum current / live A 11,7 14,3 21,3 8,1 23,9 10,0 28,7 12,2 Thermal cut-out size A C-16 C-20 C-32 C-13 C-32 C-13 C-32 C-16 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 V 230 230 230 400 230 400 230 400 Permissible voltage fields V 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 NIMBUS FS-UK M R32 NIMBUS FS-L-UK M R32 Power supply V - ph - Hz 230 - 1 -50 400 - 3 -50 230 - 1 -50 400 - 3 -50 Permissible voltage fields V 196 ÷ 253 340 ÷ 440 196 ÷ 253 340 ÷ 440 Nominal absorbed power kW 4 4 6 6 Maximum current A 19,1 9,6 30 10 Thermal cut-out A C-25 C-16 C-32 C-16 Residual-current circuit breaker mA A-30 (RCCB) size Power supply wiring Reference H07RN-F Cable min. cross-sectional 3G4 5G2,5 3G6 5G2,5 size Max. diameter [mm] 16,2 17 18 17 Recommended cable 3G4 5G4 3G6 5G4 cross-sectional size Max. diameter [mm] 16,2 19,9 18 19,9 EDF, AFR, PV signal cabling mm 2 H05RN-F 2 x 0,75 mm 2 - H07RN-F 2 x 1,0 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 34 / EN

Electrical connections 5.1 Outdoor unit electrical connections In accordance with the installation instructions, all systems for disconnecting the main power supply must have an open contact (4 mm) that guarantees full disconnection as per the indications of the Class III overvoltage conditions. a a a Make the earth connection before proceeding with all the other electrical connections. The indoor and outdoor units must be powered separately. To avoid any risk, the power cable of the indoor and outdoor units must be installed and replaced only by specialised technicians. – Remove the front panel to access the electrical parts. – Remove the pre-cut sections (1) with the aid of a screwdriver in order to pass the electrical cables. 1-ph outdoor unit terminal board M1 EH1 EH1 ST1 ST1 L N ⏚ M2 1ph G S ATG Fig. 53 1 M1 Main power supply terminal board M2 Signal terminal board ATG ATG Bus connection between indoor and outdoor units 1ph Connection to single-phase power supply EH1 Anti-freeze electrical heating element for protecting hydraulic pipes ST1 Safety thermostat (230 V) connection for the under-floor system (bridged by default) 3-ph outdoor unit terminal board a Fig. 51 Prior to accessing the terminals, all the supply circuits must be disconnected. M1 EH1 EH1 ST1 ST1 L1 L2 L3 N ⏚ M2 M2 M1 3ph G S ATG Fig. 54 Fig. 52 M1 Main power supply terminal board M2 Signal terminal board ATG ATG Bus connection between indoor and outdoor units 3ph Connection to three-phase power supply EH1 Anti-freeze electrical heating element for protecting hydraulic pipes ST1 Safety thermostat (230 V) connection for the under-floor system (bridged by default) EN / 35