49
System 3: 2-zone temperature control
• Install a mixing tank (local supply) for 2-zone temperature control.
• Install a low loss header (local supply).
• Install booster heater toward the local system, relative to the low loss header.
• For details on 2-zone installation, refer to ‘2-zone temperature control’ in “3.5 Local system”.
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 Circulation pump3 (local supply)
7 Flow switch3 (local supply) *2
8 Motorized mixing valve (local 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
Main
Sub 1 Sub 2
13
Zone2 flow temp. thermistor (THW8) (option)
14 Zone2 return temp. thermistor (THW9) (option)
15 Sub1 circulation pump1 (local supply)
16
Sub1 flow switch (local supply) *2
17
Sub1 flow temp. thermistor (THW1)
18 Sub1 return temp. thermistor (THW2)
19 Sub1 ref. liquid temp. thermistor (TH2) *1
20 Sub2 circulation pump1 (local supply)
21
Sub2 flow switch (local supply) *2
22
Sub2 flow temp. thermistor (THW1)
23 Sub2 return temp. thermistor (THW2)
24 Sub2 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 install a flow switch.
<Fig. 9.2.5>
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
(local supply)
Heating/Cooling
(Zone 2)
Mixing tank
(local supply)
en
9. Multiple outdoor units control
Summary of Contents for PAC-SIF051B-E
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