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
Coding
Assembly unit
Coding
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 bleed 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
2.7
2.8
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
V.2
