The application function HVAC green leaf, energy efficiency (HvacGrnLf11) determines if manual user operations influence HVAC energy efficiency, and manages the return to normal (energy efficient) state after receiving the reset request.
The main inputs for HVAC determining energy efficiency are:
- Setpoint shift configurable limit and heating/cooling status (using internal connection).
- The leaf icon on the room operator unit turns red if the user shifts the setpoint greater than the maximum configurable tolerance (TRShft > TolMaxSpTRShft).
- Fan speed operation, fan speed control values (via internal connection).
- The leaf icon on the room operator unit turns red If the user sets a higher fan speed than is required by the automatic control.
This AF (HvacGrnLf11) provides the Room energy efficiency indication HVAC (RHvacEei) to the room operator unit via the Room green leaf (RGrnLf) AF.
If current settings are not energy efficient and a reset request (REeiRst) ) is received from the room operator unit, then the system sets the multistate BACnet object Energy efficiency indication room (REei) to Excellent at Priority 13. This clears any manual changes and overrides initiated by room occupant(s) and resets the GreenLeaf status icon on the room operator unit back to green.