Fujitsu UTW-SCBYA Installation And Operating Manual page 20

Control Box
Line Function
Cooling circuit 1
901 U Operating mode
902 U Comfort cooling setpoint
907 U Release
If the installation is fitted with a DHW tank, set the parameter 907 to "Time program 5 / Cooling"
(In order to activate cooling only during the day and leave the DHW system to operate during the night).
908 I Flow temp setp at OT 25°C
Starting cooling temperature setting for an outdoor temperature of 25 °C.
909 I Flow temp setp at OT 35°C
Starting cooling temperature setting for an outdoor temperature of 35 °C.
Flow temperature setpoint
°C
908
20
18
909
16
912 I Cooling limit at OT
If the outdoor temperature is lower than this reading, cooling mode is deactivated.
913 S Lock time at end of heating
The time delay for operating in cooling mode after having operated in heating mode and vice versa.
918 S Summer comp start at OT
The comfort setting (902) is increased in line with the outdoor temperature rising above this reading.
919 S Summer comp end at OT
Above this reading, the comfort setting (902) is no longer affected by an increase in the outdoor temperature.
S
920 Summer comp setp increase
Maximum increase in the comfort setting (902).
In summer, the comfort setting for cooling (Line 902) is offset
upwards in line with the increase in outdoor temperature.
The saves on cooling power and prevents too great a
differential between the ambient indoor and outdoor
temperatures.
Remark : Summer compensation explains the difference
between the value set on Line 902 (or on the setting knob)
and the reading on line 8740.
- 20 -
25
figure 17 - Compensation
for the comfort setting
Setting range or display
Off, Automatic
17... 40 °C
24h/day, Time program HC,
Time program 5 / Cooling
6... 35 °C
6... 35 °C
°C
30
35
Outside temperature
--, 8... 35 °C
--, 8... 100
20... 50 °C
20... 50 °C
--, 1... 10 °C
Comfort ambient temperature setpoint
°C
902
918
Installation and operating manual "1395 - EN"
Setting Basic setting
increment
Off
0,5 °C 24 °C
Time
program 5
0,5 °C 20 °C
0,5 °C 16 °C
figure 16 - Slope
of the cooling curve
0,5 °C 24 °C
1 h 24 h
1 °C 26 °C
1 °C 40 °C
4 °C
1 °C
92 0
919
Outside temperature
°C