19
Space heating
Zone1 can operate in cooling mode or heating mode, while zone2 can only operate in heating mode; While
installation, for all thermostats in zone1, only “H、L” terminals need to be connected. For all thermostats in zone2,
only “C、L” terminals need to be connected.
1) The ON/OFF of zone1 is controlled by the room thermostats in zone1. When any “HL” of all thermostats
in zone1 closes, zone1 turns ON. When all “HL” turn OFF, zone1 turns OFF; Target temperature and
operation mode are set on the user interface;
2) In heating mode, the ON/OFF of zone2 is controlled by the room thermostats in zone2. When any ”CL” of
all thermostats in zone2 closes, zone2 turns ON. When all “CL” open, zone2 turns OFF. Target
temperature is set on the user interface; Zone 2 can only operate in heating mode. When cooling mode
is set on the user interface, zone2 keeps in OFF status.
7.2.3 Double zone control
Code Assembly unit Code Assembly unit
1 Outdoor unit 15 Filter (Accessory)
2 Indoor unit 17 Shut-off valve (Field supply)
3 User interface 18 Filling valve (Field supply)
5 Balance tank (Field supply) 19 Drainage valve (Field supply)
5.1 Automatic air purge valve 23 Collector/distributor (Field supply)
5.2 Drainage valve 25 Thermostat transfer board (Optional)
6 P_o: zone 1 circulation pump (Field supply) RT 1…7 Low voltage room thermostat (Field
supply)
8 Mixing station (Field supply) RT8 High voltage room thermostat (Field supply)
8.1 SV3: Mixing valve (Field supply) Tw2 Zone 2 water flow temperature sensor
(Optional)
8.2 P_c: zone 2 circulation pump FHL
1…n
Floor heating loop (Field supply)
13 Expansion vessel (Field supply) RAD.
1...n
Radiator (Field supply)
The circulation pump operation
When zone 1 is ON, P_o(6) starts running; When zone 1 is OFF, P_o(6) stops running;
When zone 2 is ON, SV3(8.1) is ON, P_c(8.2) starts running; When zone 2 is OFF, SV3(8.1) is OFF, P_c(8.2)
stops running .
2.1
2
2.1
2.2
2.3
2.5
2.9
2.6
19
5
5.2
5.1
13
17
15
FHL1
17
2.72.8
2.10
FHL2 FHLn
23
18
Modbus
Outdoor
19
Indoor
1
2.11
F
2.4
RT2 RT3
25
RT4
RT5
RT7
RT6
RT8
RT1
3
Tw2
8
8.1
8.2
6
RAD.1
RAD.2
RAD.n
ZONE1
ZONE2
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