Fujitsu Super High Power Series Design & Technical Manual page 75

The control sets the DHW temperature, according to the time program or continuously, to the desired
setpoint. The priority of DHW charging over room heating is adjustable in this case. The controller
has a legionella function designed for protection against legionella in the storage tank and the pipes.
The circulation pump is controlled according to the current time program and operating time.
• Setpoint value
The DHW is heated to various setpoint values. These setpoints are active according to the select-
ed operating mode and allow the desired temperatures to be reached in the DHW storage tank.
Important
For optimal operation we recommend reducing the setpoints to the lowest value. Setpoints which
are too high may interfere with heating and cause some discomfort. In this case DHW/Heating
changeover cycles may successively occur. If DHW charge boosting is not desired during the
day, we recommend adjusting the reduced temperature setpoint to 15°C. Full charging will occur
during the night at the nominal temperature.
3-6. Domestic hot water functions
Line
1610 Nominal setpoint
1612 Reduced setpoint
0 10 20
Function
Reduced Nominal
setpoint setpoint
30 40 50
- (03-31) -
DHW max
setpoint
60 70 °C
3. Function table