Giatsu WD2N8B Serie Manuel De L'utilisateur Et D'installation page 78

8.2.2 Mode set control
Outdoor
1
Assembly unit
Code
Main unit
1
User interface
2
Buffer tank (Field supply )
4
Automatic air purge valve
4.1
Drainage valve
4.2
P_o: Outside circulation pump (Field supply)
5
Expansion vessel (Field supply )
10
Filter (Accessory)
12
14 Shut-off valve (Field supply )
Space heating
Operation mode and ON/OFF of the unit are set via the room thermostat, water temperature is set on the user interface.
1）When "CL" of the thermostat keep closing for 15s, the system will run according to the priority mode set on the user interface.
2) When "CL" of the thermostat keep opening for 15s and "HT" close , the system will run according to the non-priority mode set
on the user interface.
3) When "HT" of the thermostat keep opening for 15s and "CL" open , the system will turn off.
4) When "CL" of the thermostat keep opening for 15s and "HT" open , the system will turn off.
The circulation pump and valve operation
1）When the system is in cooling mode, SV2 keeps OFF, P_o starts running.
2）When the system is in heating mode, SV2 keeps ON, P_o starts running.
2
Indoor
RT
14
17
15
14
12
16
16
Code
15
16
19
20
22
RT
FHL 1...n
FCU 1...n
13
10
4.1
5
4
4.2
Assembly unit
Filling valve (Field supply)
Drainage valve (Field supply )
Collector/distributor
Bypass valve (Field supply)
SV2: 3 -way valve (Field supply）
-
Low voltage room thermostat
Floor heating loop (Field supply)
Fan coil unit (Field supply )
19
20
FCU1 FCU2 FCUn
19
FHL1 FHL2 FHLn