Nimbus Compact M NET R32 Installation Manual UK

Electrical connections

Electrical connections – Remove the shaped plugs (9) for passing cables (10), (12) and (13). – Pass the power cable (10) through the cable grommet (11). – Pass the load power cables (12) and (13) through the cable grommets (14) and (15). – Put the shaped plugs (9) back on, while making sure that the opening is completely closed. 10 11 Power supply connections AL L ‘ N ‘ ⏚ L1 L2L3 N ⏚ 1ph Fig. 62 12 13 14 15 AL 1ph Power supply terminal board Connection to single-phase power supply AL 9 L ‘ N ‘ ⏚ L1 L2L3 N ⏚ 3ph 1 Fig. 60 Fig. 63 M1 AL M2 2 AL Power supply terminal board 3ph Connection to three-phase power supply 1 Remove the jumper (1) before making the three-phase connection. a Be careful to make the proper three-phase connection to prevent short-circuits. Signal connections SO1 IN G M1 1 M1 Signal terminal board M2 230 V terminal board AL Power supply terminal board 1 Signal connections 2 230 V connections Fig. 61 Note: secure the cables inside the appliance using the collars. M1 ATG A Se TNK Bus i ATGBUS ANODE GND BUS +24 V +24 V ATG A EBUS 2 SE TNK B T Se TNK Bus Fig. 64 Signal terminal board ATG Bus connection between indoor and outdoor units Anode connection Outdoor sensor connection Tank sensor connection Interface connection (if the user interface is not mounted on the machine) Make the connections of the TNK sensor and of the anode in case of the stand-alone tank. 38 / EN

IN G Electrical connections The cross-section and length of the cables must be sized according to the power indicated on the indoor unit’s data plate. a a Once you have completed the connections between the indoor and outdoor units, put both electrical panels back into place. Always keep the power and signal cables separate. Signal terminal board Power terminal board M2 M1 OUT AUX 2 OUT AUX 1 HV IN 1 HV IN 2 OUT AUX 4 AUX OUT 3 PM AUX V1 V2 N ⏚ L LC N LO LC N LO SO1 SO1 OPEN ATG BUS DHW HEATER ANODE TA1 TA2 SE TNK IN Reference ANODE TA1 TA2 SE TNK EBUS 2 IN-AUX 1 IN-AUX 2 STE BUF OPEN THERM DHW HEATER ATGBUS S01 G EBUS2 THERM GND BUS +24V GND +24V GND B T RL FB STH IN IN AUX AUX 1 2 STE BUF Fig. 65 Description Connection to the tank protection anode. Observe the electrical polarities. Contact room thermostat connection, zone 1. (Bridged by default). Room contact thermostat connection, zone 2. Outdoor temperature sensor connection. Tank sensor connection. BUS connection for system interface. Auxiliary input 1 connection (dry contact). Select the operating mode through parameter 1.1.3. Connection of auxiliary input 2 (dry contact). Connection of the safety thermostat to the EM board. Select the operating mode through parameter 1.1.4. By default it is set to under-floor safety thermostat and is bridged. Connection to the puffer sensor. Connection to thermostat Open - Therm Connection to the “Heating Element” accessory of the tank Connection between indoor and outdoor unit Connection of the terminals marked IN and G to the power measurement device. Reference OUT-AUX 1 / 2 / 3 / 4 HV input 1 HV input 2 PM AUX V1 V2 N L 230V Fig. 66 Description Auxiliary output, potential-free contact. Select the operating mode through parameters 1.2.0/ 1.2.1 / 1.2.2 / 1.2.3. 230 V input. Select the operating mode through parameter 1.1.0. 230 V input. Select the operating mode through parameter 1.1.1. Auxiliary pump connection. Diverter valve connection for domestic water supply distribution network. Diverter valve connection for cooling circuit. EN / 39