Fujitsu Super High Power Series Design & Technical Manual page 68

• Cooling characteristic
The controller computes the flow temperature required for a given composite outdoor temperature
based on the cooling characteristic. This is defined by two reference points (flow temperature set-
points at 25°C and 35°C).
– Flow temperature setpoint 25°C: This is the cooling flow temperature required when the com-
posite outdoor temperature is 25°C, without summer compensation.
– Flow temperature setpoint 35°C: This is the cooling flow temperature required when the com-
posite outdoor temperature is 35°C, without summer compensation.
The cooling characteristic is adjusted for a 25°C room temperature setpoint. If the room tempera-
ture setpoint is changed the curve will automatically adapt.
• Eco
– Cooling limitation at OT: If the composite outdoor temperature is higher than the cooling limi-
tation, cooling is released. If the composite outdoor temperature falls at least 0.5°C below the
cooling limitation, cooling is locked.
– Lock time at the end of heating: To avoid a quick start of cooling after termination of heating,
the cooling function is locked for a time period which can be adjusted with this setting. The lock
time starts when there is no valid heating demand from heating circuit 1. Heating demands from
heating circuit 2 or P are ignored.
NOTE: Switching off and switching on again the mode selection key causes the lock time to be in-
terrupted.
3-5. Cooling circuit 1 functions
Line
908 Flow temperature setpoint at OT 25°C
909 Flow temperature setpoint at OT 35°C
Flow temp setpoint
908
909
25°C
Line
912 Cooling limitation at OT
913 Lock time at the end of heating
Function
35°C Composite OT
Function
- (03-24) -
3. Function table