Nimbus Plus M NET R32 Installation Manual UK

Hydraulic connections

Hydraulic connections Key Symbol Description System flow Symbol Description Hydraulic circuit-breaker Symbol Description CUBE System return Communication connection Electrical connection Domestic cold water inlet Domestic hot water outlet Buffer Storage active Timer-controlled thermostat Lightbox Zone manager Refrigerant circuit Gas supply Circulation pump Shutter valve DHW expansion vessel System expansion vessel NTC RF 2-zone wired control module 2-zone wireless control module AB B A Diverter valve DHW 3-way mixing valve System 3-way mixing valve Safety valve Differential bypass valve Non-return valve Sludge filter Y-shaped filter Discharge outlet Syphon Plate heat exchanger Manifold Low-temperature heating zone Radiator Fan coil unit Dehumidifier External probe RF external sensor Gateway Sensys NET HD CUBE S NET RF receiver Heating only Cooling only Heating / Cooling Living room Sleeping area Delivery temperature sensor Return temperature sensor Anti-freeze kit Kit barrette CKZ puffer kit CUBE RF Y-shaped filter kit Space heating supplementary heating element kit NOTE: installations with under-floor system In installations with under-floor heating, make sure that in all operating modes (the hot water switching mode in particular), the input temperature of the floor falls within the limits allowed for the application as specified in the national regulations. For installations with under-floor system, install a safety device on the heating delivery circuit, as specified in the national regulations. For the electrical connection of the thermostat, refer to the paragraph “Electrical connections”. If the delivery temperature is too high, the system stops in both domestic hot water and heating/cooling modes, and the remote control will report error code 936 “Under-floor safety thermostat open”. The system will start again when the manual-reset thermostat is closed. The input to be used as a connection to the under-floor safety thermostat is IN AUX 2 STE by default (function set through parameter 1.1.4). If the safety thermostat is connected to STE and the safety device intervenes, the circulation pump will continue to be fed and the anti-freeze protection is always guaranteed. If the safety thermostat is connected to STT and the safety device intervenes, the circulation pump will no longer be fed and the anti-freeze protection is not guaranteed. 28 / EN

Hydraulic connections NOTE: Installation of a tank for the production of Domestic Hot Water When a tank is installed to produce domestic hot water, the installer must verify and provide evidence of conformity with respect to the following regulations: – The Building Regulations 2010 (S.I. 2010 No. 2214), as amended; – The Water Supply (Water Fittings) Regulations 1999 (S.I. 1999 No. 1148), as amended. It is possible to connect the tank probe to the system (thermostatic control device). Connect the tank probe "TNK" to the "M2 terminal Board" as shown in the chapter "Electrical connections", paragraph "Indoor unit electrical connections". The NTC probe shall meet the following requirements: R(25°C)=10KΩ, β=3977 . Acting on the system interface, change the configuration of the energy manager for the Tank Managment ("1.0.2 Tank management", item: "1 Storage tank with NTC sensor"). See chapter ”Commissioning”, paragraph “technical parameters”. During operations, if the temperature measured by the tank probe exceeds 80°C, error 935 is displayed on the interface. In this case the heat sources from the heat pump to the tank are switched off. EN / 29