Fujitsu WSYA050ML3 Design & Technical Manual page 75

• Eco functions
HC1
730
– Summer/Winter heating limit
The summer/winter heating limit switches the heating on or off through the year according to the
temperature ratio. Changeover is performed automatically when in automatic mode and thus
avoids the user having to turn the heating on or off. Changing the input value makes the respec-
tive annual periods (summer/winter) shorter or longer.
• If the value is increased:
Changing to winter operating mode is advanced, changing to summer mode is delayed.
• If the value is decreased:
Changing to winter mode is delayed, changing to summer mode is advanced.
Important
This function does not work in "Continuous comfort temperature" mode (Sunlight). The con-
troller displays "ECO". The outdoor temperature is attenuated to take the building's dynamics
into account.
• Flow temperature setpoint
HC1
740
741
This limitation allows to define a range for the flow temperature setpoint. When flow temperature
setpoint demanded by heating circuit reaches the threshold, the setpoint remains permanently at
the maximum or minimum, even if the heat demand continues to increase or decrease.
Example (Line 741 and 1041):
– Flow heating system = 50°C
– Higher temperature radiator = 65°C
3-4. Heating circuit 1 and 2 functions
Line
HC2
1030 Summer/Winter heating limit
Attenuated outdoor T
ON
OFF
Line
HC2
1040 Flow temperature setpoint minimum (For fan converters)
1041 Flow temperature setpoint maximum
Function
Summer/Winter heating limit +1°C
Summer/Winter heating limit
Summer/Winter heating limit -1°C
Days
Function
- (03-17) -
3. Function table