Fujitsu Waterstage WS G140DC6 Series Maintenance Document page 59

Split system (Single phase and 3-phase type)
A room sensor must be connected.
-
The "room influence" parameter must be set
-
between 1 and 99.
The reference room (where the room sensor
-
is installed) must not contain adjusted thermostatic
valves. If present in the room, these valves must be
fully open.
Control according to room temperature only
The flow temperature is adjusted according to the
room temperature setpoint,
temperature and its evolution. A slight increase in
Quick setback
Line no.
HC1 HC2
780 1080
During quick setback, the heating circuit pump is
deactivated and, in the case of mixing circuits, the
mixing valve is fully closed.
When using a room sensor, the function keeps the
heating off until the room temperature drops to the
level of the "Reduced" or "Frost protection" setpoint.
If the room temperature falls to the reduced or frost
level, the heating circuit pump is activated and the
mixing valve released.
Optimisation at switch-on and switch-off
Line no.
HC1 HC2
790 1090
791 1091
Optimum start control max
The change in temperature levels is optimised in
such a way as to reach the comfort setpoint during
changeover times.
Maintenance Document 1544-1
the current room
Programming line
Quick setback
Composite outside
temperature
15°C
10°C
5°C
0°C
-5°C
-10°C
-15°C
-20°C
Programming line
Optimum start control max
Optimum stop control max
room temperature, for example, causes an immediate
drop in the flow temperature.
Information:
Activation of the function requires taking into account
the following requirements:
A room sensor must be connected.
-
The "room influence" parameter must be set
-
to 100%.
The reference room (where the room sensor is
installed) must not contain adjusted thermostatic
valves. If present in the room, these valves must be
fully open.
Quick setback switches the heating off for a certain
period of time, depending on the outside temperature
and the building time constant.
Duration of quick setback when "Comfort" setpoint
minus "Reduced" setpoint = 2 K (e.g. "Comfort"
setpoint = 20 °C and "Reduced" setpoint = 18 °C)
Building time constant [h]
5
Duration of quick setback [h]
7.7
3.3
2.1
1.6
1.3
1.0
0.9
0.8
Optimum stop control max
The change in temperature levels is optimised in
such a way as to reach the comfort setpoint -1/4 °C
during changeover times.
59