Midea M-thermal Mono Series - Double Zone Control

17
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.
8.2.3 Double zone control
Coding
Assembly unit
Coding
Assembly unit
1
Main unit
2
4
User interface
4.1
Balance tank (Field supply)
19
4.2
Automatic bleed valve
21
Collector/distributor (Field supply)
5
Drainage valve
Hydraulic adapter box (Optional)
23
P_o: zone 1 circulation pump (Field supply)
RT 1…7
Low voltage room thermostat (Field
supply)
23.1
Mixing station (Field supply)
RT8
High voltage room thermostat (Field supply)
23.2
SV3: Mixing valve (Field supply)
Tw2
Zone 2 water flow temperature sensor
(Optional)
12
P_c: zone 2 circulation pump (Field supply)
FHL
1…n
Floor heating loop (Field supply)
RAD.
1...n
Radiator (Field supply)
The circulation pump operation
When zone 1 is ON, P_o starts running; When zone 1 is OFF, P_o stops running;
When zone 2 is ON, SV3 is ON, P_c starts running; When zone 2 is OFF, SV3 is OFF, P_c
stops running.
4
4.2
4.1
10
FHL1 FHL2 FHLn
19
Outdoor
Indoor
Tw2
23
23.1
23.2
5
RAD.1
RAD.2
RAD.n
ZONE1
ZONE2
RT2 RT3
21
RT4
RT5
RT7
RT6
RT8
RT1
2
Modbus
15
16
14
12
14
16
Filter (Accessory)
10
Expansion vessel
(Field supply)
14
Shut-off valve (Field supply)
16
Drainage valve (Field supply)
15
Filling valve (Field supply)
1