12
8.2 Application 2
ROOM THERMOSTAT control for space heating or cooling need to be set on the user interface. It can be set
in three ways: MODE SET/ONE ZONE/DOUBLE ZONE. The unit can be connected to a low voltage room
thermostat.
The circulation pump operation
5
4
4.2
4.1
10
FHL1
FHL2
FHLn
19
8.2.1 One zone control
Outdoor
1
Indoor
RT
Code
Assembly unit
Code
Assembly unit
1
Main unit
14
Shut-off valve
(Field supply)
15
Filling valve (Field
supply)
2
User interface
16
Drainage valve
(Field
supply)
4
Buffer tank (Field supply)
19
Collector/distributor
(Field
supply)
4.1
Automatic air purge valve
4.2
Drainage valve
5
P_o: Outside circulation pump
(Field
supply)
RT
Low voltage room thermostat (Field supply)
10
Expansion vessel (Field supply)
FHL 1...n Floor heating loop (Field supply)
12
Filter (Accessory)
Modbus
15
16
14
12
14
2
16
Space heating
One zone control: the unit ON/OFF is controlled by the room thermostat, operation mode and outlet water
temperature are set on the user interface. System is ON when “H,L” of the thermostat keep closing for 15s. When
“H,L” keep opening for 15s, system turns OFF.
14
16
When the system is ON, which means “H,L” of the thermostat close, P_o starts running; When the system is OFF,
which means “H,L” open, P_o stops running.