Cooling Circuit 1 Functions - Fujitsu WSYA050ML3 Design & Technical Manual

3-5. Cooling circuit 1 functions

Line Access
901 U Operating mode
902 U Comfort cooling setpoint
903 U Reduced setpoint
Flow temperature setpoint
908 I
at OT 25°C
Flow temperature setpoint
909 I
at OT 35°C
912 I Cooling limitation at OT
Lock time at end of heating/
913 S
cooling
Summer compensation start
918 S
at OT
Summer compensation end
919 S
at OT
Summer compensation
920 S
setpoint increase
Flow temperature setpoint
923 S
minimum OT 25°C
Flow temperature setpoint
924 S
minimum OT 35°C
S Room influence
If the installation is fitted with a room thermostat:
This function enables you to choose the ambient temperature's influence on the setting.
928
If no value is entered, the setting is made based on the temperature control.
If the parameter is set at 100%, the setting is only based on the ambient temperature.
932 S Room temperature limitation
938 S Mixing valve decrease
941 S Actuator running time
With primary controller/
S
system pump
963
*: Basic setting: 1 circuit = No; 2 circuit = Yes
The cooling sequence is automatically started when the room temperature is higher than the comfort
setpoint in cooling mode (line 902). The cooling function must be activated (line 901 = Auto) and is
triggered by programming clock (line 907). The cooling sequence is interrupted as soon as heating
circuit 1 indicates a need for heat or in the presence of a heat demand signal from a DHW circuit or
other heating circuit (only if cooling is active).
The controller measures the current room temperature and compares it with the room temperature
setpoint to compute the flow temperature setpoint. If the temperature is not low enough the heat
pump is started to provide cooling (reversed control of the mixing valve).
The following settings apply to the hydraulic circuit in zone 1 (HC1). If there is a second zone, this
zone can be cooled with the setting (line 963) which will connect the pump directly to zone 2. This
will require setting the "Mixing valve sub-cooling" parameter (line 938) to a suitable value in order for
both zones to be adequately cooled according to the available emitters.
WARNING
Cooling mode is prohibited on all radiators, heating only floors, or any emitters not intended for this
purpose.
3-5. Cooling circuit 1 functions
Function Setting range or display
Protection, Automatic,
Reduced, Comfort
17...40°C
5...40°C
6...35°C
6...35°C
8...35°C
8...100 h
20...50°C
20...50°C
1...10°C
6...35°C
6...35°C
1...100%
0.5...4°C
0...20°C
30...873 s
No, Yes
- (03-23) -
Setting Factory
increment setting
Protection
0.5°C 24°C
26°C
0.5°C 20°C
0.5°C 16°C
0.5°C 24°C
1 h 24 h
1°C 26°C
1°C 40°C
1°C 4°C
0.5°C 18°C
0.5°C 18°C
1% 80%
0.5°C 0.5°C
1°C 0°C
1 second 240 seconds
No*
3. Function table