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Drainage valve must be installed at the lowest position of the piping system.
8.3 Cascade system
Outdoor
10
9
9
9
8
8
7
Code
Assembly unit
1.1
Master unit
1.2...n
Slave unit
2
User interface
3
Buffer tank(Field supply)
3.1
Automatic air purge valve
3.2
Drainge valve
3.3
Tbt: Buffer tank upper temperature sensor(optional)
3.4
Filling valve(Field supply)
4
P_o: Outside circulation pump (Field supply)
5
Expansion vessel(Field supply)
6
T1: Total water flow termperature sensor(Optional)
7
Filter(Accessory)
8
Check valve(Field supply)
9
Shut-off valve(Field supply)
NOTE
13
3
8
6
8
9
9
9
7
7
Code
15
Indoor
10
12
4
12.1
12.2
5
3.4
3.1
9
9
3.3
3.2
Assembly unit
10
Collector/distributor(Field supply)
11
Bypass valve (Field supply)
12
Mixing station(Field supply)
12.1
SV3:Mixing valve(Field supply)
P_C: Zone2 circulation pump
12.2
(Field supply)
13
Water manonmeter(Field supply)
r
r
The space operates in cooling/
heating mode
The space only operates in heating
mode
Auxiliary heating source(Field
supply)
11
11
10
d
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