5
System 3: 2-zone temperature control
• Install a mixing tank (field supply) for 2-zone temperature control.
• Install a low loss header (field supply).
• Install booster heater toward the local system, relative to the low loss header.
• For details on 2-zone installation, refer to "3.6 Piping”.
No.
Component
Wiring
Master Slave 1 Slave 2
1
Booster heater (field supply)
2
Circulation pump1 (field supply)
3
Flow switch1 (field supply) *2
4
Circulation pump2 (field supply)
5
Flow switch2 (field supply) *2
6
Circulation pump3 (field supply)
7
Flow switch3 (field supply) *2
8
Motorized mixing valve (field supply)
9
Flow temp. thermistor (THW1)
10 Return temp. thermistor (THW2)
11
Zone1 flow temp. thermistor (THW6) (option)
12 Zone1 return temp. thermistor (THW7) (option)
No.
Component
Wiring
Master Slave 1 Slave 2
13
Zone2 flow temp. thermistor (THW8) (option)
14 Zone2 return temp. thermistor (THW9) (option)
15
Slave1 circulation pump1 (field supply)
16
Slave1 flow switch (field supply) *2
17
Slave1 flow temp. thermistor(THW1)
18 Slave1 return temp. thermistor (THW2)
19 Slave1 ref. liquid temp. thermistor (TH2) *1
20
Slave2 circulation pump1 (field supply)
21
Slave2 flow switch (field supply) *2
22
Slave2 flow temp. thermistor (THW1)
23 Slave2 return temp. thermisto r(THW2)
24 Slave2 ref. liquid temp. thermistor (TH2) *1
*1 When the outdoor unit is split type, TH2 needs to be installed. <Fig. 9.2.1>
*2 For safety protection, it is recommended to instal a flow switch.
<Fig. .2.4>
9
10
17
18
19
12
11
6
8
14
4
15
5
13
7
2
1
3
16
22
23
20
21
24
Outdoor unit
Heating/Cooling
(Zone 1)
Outdoor unit
Low loss header
(field supply)
Heating/Cooling
(Zone 2)
Mixing tank
(field supply)
. Multiple outdoor units control
