5
. Multiple outdoor units control
System 4: Heating/Cooling system (with Boiler)
• Install a mixing tank (field supply) for connection of the boiler.
• Install a low loss header (field supply).
• Install booster heater between low loss header and mixing tank.
• For more details, refer to the installation manual of PAC-TH011HT-E.
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
Flow temp. thermistor (THW1)
7
Return temp. thermistor (THW2)
8
Flow temp. thermistor (THW6) (option)
9
Return temp. thermistor (THW7) (option)
10
Boiler flow temp. thermistor (THWB1) (option)
No.
Component
Wiring
Master Slave 1 Slave 2
11 Boiler return temp. thermistor (THWB2) (option)
12
Slave1 circulation pump1 (field supply)
13
Slave1 flow switch (field supply) *2
14
Slave1 flow temp. thermistor (THW1)
15 Slave1 return temp. thermistor (THW2)
16 Slave1 ref. liquid temp. thermistor (TH2) *1
17
Slave2 circulation pump1 (field supply)
18
Slave2 flow switch (field supply) *2
19
Slave2 flow temp. thermistor (THW1)
20 Slave2 return temp. thermistor (THW2)
21 Slave2 ref. liquid temp. thermistor (TH2) *1
*2 For safety protection, it is recommended to instal a flow switch.
No.
Component
Wiring
Master
Slave 1
(Hydrobox)
Slave 2
(Hydrobox)
1
Booster heater(field supply)
2
Circulation pump1 (field supply)
3
Flow switch1 (field supply) *2
4
Flow temp. thermistor (THW1)
5
Return temp. thermistor (THW2)
<Fig. .2.5>
*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.
System 5: Heating/Cooling system (with Hydrobox)
• Install a low loss header (field supply).
• Install booster heater toward the local system, relative to the low loss header.
4
5
2
1
3
Outdoor unit
Hydrobox
Heating/
Cooling
Outdoor unit
Hydrobox
Low loss header
(field supply)
6
14
15
16
21
7
8
9
10
11
4
5
2
12
1
3
13
19
20
17
18
Outdoor unit
Heating/Cooling
Outdoor unit
Mixing tank
(field supply)
Boiler
Low loss header
(field supply)
<Fig. .2.>