Dhw Functions - Fujitsu Waterstage WS G140DC6 Series Maintenance Document

Split system (Single phase and 3-phase type)

4.3.6 DHW Functions

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.
Setpoint value
Line no. Programming line
1610 Nominal setpoint
1612 Reduced setpoint
The DHW is heated to various setpoint values. These
setpoints are active according to the selected
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.
Release
Line no. Programming line
1620 Release of DHW load
(24h/day / Heating circ time pgm / Time program 4/DHW / Low-tariff/ Time pgm 4/DHW or Low-tariff)
24h/day
(Not recommended)
Regardless of the time programs, the temperature of
the domestic hot water is continuously maintained at
the DHW nominal
Example:
Heating circuit time programs:
(Not recommended)
68
DHW reduced setpoint
setpoint temperature.
The controller has a configurable 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 mode.
operating mode and allow the desired temperatures
to be reached in the DHW storage tank.
Comfort setting DHW max setpoint
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.
Maintenance Document 1544-1