Fujitsu WATERSTAGE 112 Maintenance Document page 90

Heat Pump, Split System, Single Service, 3 phase
Release
Line no. Programming line
1620 Release
(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 setpoint temperature.
Example:
Heating circuit time programs:
(Not recommended)
Depending on the heating circuit time programs, the
DHW setpoint is changed between the DHW
temperature nominal
Example:
Time program 4 / DHW:
(Recommended)
Time program 4 of the local controller is taken into
account for the DHW mode. The changeover
between DHW nominal setpoint and DHW reduced
Low tariff
Released when the low tariff input is active (Input
Ex5)
90
setpoint and the
temperature reduced setpoint. The first switch-on
point of each phase is advanced by one hour each
DHW time.
setpoint occurs on the changeover times of this
program. Thus, domestic hot water charging takes
place independently from the heating circuits.
Time pgm 4/DHW or low tariff
Released when DHW program 4 is set to "Nominal"
or if the low tariff input is active.
Maintenance Document 1394-1