50
9. Multiple outdoor units control
System 4: Heating/Cooling system (with Boiler)
• Install a mixing tank (local supply) for connection of the boiler.
• Install a low loss header (local supply).
• Install booster heater between low loss header and mixing tank.
• For more details, refer to the installation manual of PAC-TH012HT-E.
No.
Component
Wiring
Main
Sub 1 Sub 2
1 Booster heater (local supply)
2 Circulation pump1 (local supply)
3 Flow switch1 (local supply) *2
4 Circulation pump2 (local supply)
5 Flow switch2 (local 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
Main
Sub 1 Sub 2
11 Sub1 circulation pump1 (local supply)
12
Sub1 flow switch (local supply) *2
13
Sub1 flow temp. thermistor (THW1)
14 Sub1 return temp. thermistor (THW2)
15 Sub1 ref. liquid temp. thermistor (TH2) *1
16 Sub2 circulation pump1 (local supply)
17
Sub2 flow switch (local supply) *2
18
Sub2 flow temp. thermistor (THW1)
19 Sub2 return temp. thermistor (THW2)
20 Sub2 ref. liquid temp. thermistor (TH2) *1
*1 Cooling system is available only with ERS models.
*2 For safety protection, it is recommended to install a flow switch.
No.
Component
Wiring
Main
Sub 1
(Hydrobox)
Sub 2
(Hydrobox)
1 Booster heater(local supply)
2 Circulation pump1 (local supply)
3 Flow switch1 (local supply) *2
4 Flow temp. thermistor (THW1)
5 Return temp. thermistor (THW2)
<Fig. 9.2.6>
*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 install a flow switch.
System 5: Heating/Cooling system (with Hydrobox)*1
• Install a low loss header (local 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
(local supply)
en
6
13
14
15
20
7
8
9
10
4
5
2
11
1
3
12
18
19
16
17
Outdoor unit
Heating/Cooling
Outdoor unit
Mixing tank
(local supply)
Boiler
Low loss header
(local supply)
<Fig. 9.2.7>
Summary of Contents for PAC-SIF051B-E
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