Fujitsu WATERSTAGE 112 Maintenance Document page 79

Heat Pump, Split System, Single Service, 3 phase
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.
Comfort
setpoint(710)
Reduced
setpoint(712)
Maintenance Document 1394-1
Programming line
Optimum start control max
Optimum stop control max
Programming line
Reduced setpoint increase start
Reduced setpoint increase end
that case, when outdoor
Begin
increase(800)
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
temperature adjustment period when changing over
to the comfort setpoint.
End increase
(801)
Averaged OT
79