13
8.2.2 Mode set control
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 “HL” close , the system will run according to the non-priority mode set
on the user interface.
3) When “HL” 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 “HL” open , the system will turn off.
Space heating
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.
4
4.2
4.1
10
Outdoor
1
FCU1
FCUn
FCU2
FHL1
FHL2
FHLn
19
19
20
5
22
M
Indoor
RT
2
17
15
16
14
12
14
16
Code
Assembly unit
Code
Assembly unit
1
Main unit
2
User interface
16
4
Buffer tank (Field supply)
19
4.1
Automatic air purge valve
20
4.2
Drainage valve
5
P_o: Outside circulation pump
(Field
supply)
RT
22
10
Expansion vessel (Field supply)
FHL 1…n
12
Filter (Accessory)
FCU 1...n
14
Shut-off valve
15
Filling valve (Field supply)
(Field supply)
Collector/distributor
Low voltage room thermostat
SV2: 3
-
-way valve (Field supply
）
Drainage valve (Field supply)
Bypass valve (Field supply)
Floor heating loop (Field supply)
Fan coil unit (Field supply)