Ochsner Europa 333 Genius - Modbus RTU

This template enables full Modbus RTU integration of the Ochsner Europa 333 Genius domestic hot water heat pump into Loxone.

Sensor readings (read): - Hot water temperature (AN1, Reg. 2006) - Tank sensors F1–F4 (Reg. 2001–2004) - Evaporator temperature (Reg. 2007) - Fan speed in RPM (Reg. 2005) - Variable heating element load in % (Reg. 2011) - Current surplus power (Reg. 2010) - Calculated total surplus (Reg. 2012) - Current hot water setpoint (Reg. 2013)

Control (write): - Hot water setpoint (Reg. 2200) - PV surplus power 0–2100W (Reg. 2201) — ideal for PV self-consumption optimization - Anti-legionella setpoint (Reg. 2203)

Important notes: - Parameter L11 must be set to 1 to activate Modbus (factory default is 0, despite manual stating otherwise) - Register 2201 uses 16-bit signed integer (two's complement) - All temperature registers use resolution 0.01°C - Smart-Grid contacts on terminal X2 (E2, E3) can be combined with Modbus for EVU shutdown (can be used to lock the heat pump) and additional control functions like increased setpoint to use surplus or cheap energy more efficient.

All important information are written in the manual - chapters 4.12 to 4.15

Have fun!