The domestic hot water temperature setpoint is defined as shown in the table below:
Table 2. DHW Control Setpoint
DHW setpoint |
Condition |
DHW_TempSp |
Auto operation - time schedule
|
parameter DEX-01 |
DHW setpoint during extended operation |
parameter LEG-01 |
DHW setpoint during anti-legionella operation |
According to the currently-valid Drinking Water Guidelines, the DHW setpoint should be at least 60 °C, to guarantee a minimum circulation temperature of 55 °C.
The calculated setpoint can be increased by the:
The behavior of the internal domestic hot water control signal is shown in the figure below:
Fig. 2. DHW Temperature Control