- pCH - Central Heating Pressure
- tCHo - Central Heating Supply Temperature
- tCo - DHW hot out temperature
- dpH - Differential Pressure on network
- fC - Flow rate to hot water
- fHCH - Network flow rate for central heating
- fHDHW - Network flow rate for hot water
- tHoCH - Network return temperature from central heating
- tHoDHW - Network return temperature from hot water
- tH - Primary hot supply temperature
- tHo - Primary return temperature
If HIU Is a SLIM Extra, with no temperature control of the central heating circuit
- tRtn - Central Heating Return temperature
- tFlow - Central Heating Flow temperature