Fujitsu Super High Power Series Design & Technical Manual page 63

• Optimization at switch-on and switch-off
HC1
790
791
– Optimum start control maximum:
The change in temperature levels is optimized in such a way as to reach the comfort setpoint
during changeover times.
– Optimum stop control maximum:
The change in temperature levels is optimized in such a way as to reach the comfort setpoint
-1/4 °C during changeover times.
• Reduced setpoint increase
HC1
800
801
This function is used mainly in heating installations that do not have high supplies of power (e.g.
low power use homes). When outdoor temperatures are low, adjusting the temperature would take
too long. 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.
• Mixing valve control
HC1
830
834
– 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 heater generator.
– Actuator running time:
For the 3-position servomotor, the travel time can be adjusted. With a 2-position servomotor, the
adjusted travel time is inoperative.
3-4. Heating circuit 1 and 2 functions
Line
HC2
1090 Optimum start control maximum
1091 Optimum stop control maximum
Line
HC2
1100 Reduced setpoint increase start
1101 Reduced setpoint increase end
Comfort
setpoint (710)
Reduced
setpoint (712)
Line
HC2
1130 Mixer valve boost
1134 Actuator running time
Function
Function
Start increase End increase
(800) (801)
Composite OT
Function
- (03-19) -
3. Function table