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9.3.1 Check the water circuit
9.3 Water piping
If there is no glycol (anti-freeze) in the system or there is a power supply failure or pump failure, drain the system (as
shown in the figure below).
If water is not removed from the system in freezing weather when unit is not used, the frozen water may damage the
water circle parts.
NOTE
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
:
5
4
4.2
4.1
10
FHL1
FHL2
FHLn
19
20
Indoor
Outdoor
1
15
16
14
12
14
Modbus
16
2
Assembly unit
Code
Assembly unit
Main unit
15
Shut-off valve (Field supply)
User interface(accessory)
Filling valve (Field supply)
Buffer tank
Automatic air purge valve
(Field supply)
19
Drainage valve (Field supply)
Collector/distributor (Field supply)
Drainage valve
10
P_o: Outside circulation pump (Field supply)
Expansion vessel(field supply)
12
FHL
1…n
Floor heating loop (Field supply)
Filter (Accessory)
Bypass valve (field supply)
14
16
20
Code
1
2
4
4.1
4.2
5
All piping lengths and distances have been taken into consideration.
The maximum allowed thermistor cable length is
20m.