HTW A60CGN8PLUS Manuel De L'utilisateur page 100

7.2.3 Double zone control
Outdoor
1
Coding Assembly unit
1 Outdoor unit
2 Indoor unit
3 User interface
5 Balance tank (Field supply)
5.1 Automatic bleed valve
5.2 Drainage valve
6 P_o: zone 1 circulation pump (Field supply) RT 1...7
8 Mixing station (Field supply)
8.1 SV3: Mixing valve (Field supply)
8.2 P_c: zone 2 circulation pump
13 Expansion vessel (Field supply)
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.
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 .
Indoor
RT2
2
2.4
2.2
2.5
2.9
2.6
RT7
3
RT8
2.11
2.1
2.3 2.1
RT1
2.10
2.8 2.7
17 17
15
19
18
19
Modbus
Coding
15
17
18
19
23
25
RT8
Tw2
FHL
1...n
RAD.
1...n
19
RT3
RT4
25
RT5
RT6
13
5.1
6
8
Tw2
8.1 8.2
5
5.2
Assembly unit
Filter (Accessory)
Shut-off valve (Field supply)
Filling valve (Field supply)
Drainage valve (Field supply)
Collector/distributor (Field supply)
Thermostat transfer board (Optional)
Low voltage room thermostat (Field
supply)
High voltage room thermostat (Field supply)
Zone 2 water flow temperature sensor
(Optional)
Floor heating loop (Field supply)
Radiator (Field supply)
RAD.1
RAD.2
RAD.n
23
FHL1 FHL2 FHLn
ZONE1
ZONE2