Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document page 58

Split system single phase type
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.
Reduced Setpoint Increase
Line no.
HC1 HC2
800 1100
801 1101
This function is used mainly in heating installations
that do not have high supplies of power (e.g. low
energy homes). In
temperatures are low, adjusting the temperature
would be too long.
Mixing Valve Control
Line no.
HC1 HC2
830 1130
834 1134
Mixer valve boost
The controller adds the increase set here to the
current flow setpoint and uses the result as the
temperature setpoint for the heat generator.
58
Programming line
Optimum start control max
Optimum stop control max
Programming line
Reduced setpoint increase start
Reduced setpoint increase end
that case, when
Begin
increase(800)
Comfort
setpoint(710)
Reduced
setpoint(712)
Programming line
Mixer valve boost
Actuator running time
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.
Increasing the reduced setpoint prevents excessive
cooling of the rooms in order to shorten the
outdoor temperature adjustment period when changing over
to the comfort setpoint.
End increase
(801)
Averaged OT
Actuator running time
For 3-position control the valve Actuator running time
can be adjusted. With a 2-position servomotor, the
adjusted travel time is inoperative.
Maintenance Document 1589-3