26
8.5.1 Check the water circuit
The unit is equipped with a water inlet and water outlet for connection to a water circuit. This circuit must be provided by a
licensed technician and must comply with local laws and regulations.
The unit is only to be used in a closed water system. Application in an open water circuit can lead to excessive corrosion of
the water piping.
Example：
19
2.1
2
2.1
2.2
2.4
2.9
2.3
2.5
2.6
6
5
5.2
5.1
13
17
15
17
2.72.82.10
18
19
FHL1 FHL2 FHLn
23
Modbus
24
Indoor
Outdoor
1
1
2
Assembly unit Assembly unit
Code Code
13
FHL 1…n
15
17
18
19
3
Outdoor unit
Indoor unit
Filter (accessory)
Balance tank (field supply)
5
User interface (accessory)
Expansion vessel (field supply)
Shut-off valve (field supply)
Filling valve (field supply)
Drainage valve (field supply)
Bypass valve (field supply)
Collector/distributor (field supply)
Floor heating loop (field supply)
5.1
Automatic air purge valve
5.2
6
P_o: Outside circulation pump (field supply)
Drainage valve
23
24
2.11
F
3
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