Riello NXHM - Water Piping

88
ENGLISH
9.4 Water piping
All piping lengths and distances have been taken into consideration.
Requirements
The maximum allowed thermistor cable length is 20m. This is the maximum allowable distance between the domestic hot water tank and the
unit (only for installations with a domestic hot water tank).The thermistor cable supplied with the domestic hot water tank is 10m in length.In
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NOTE
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NOTE
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.
9.4.1 Check the water circuit
The units are equipped with a water inlet and outlet for connection to a water circuit
The units should only be connected to closed water circuits. Connection to an open water circuit would lead to excessive corrosion of the water
piping. Only materials complying with all applicable legislation should be used.
Example
----
FHL1 FHL2 ---- FHLn
8.1
8.2
2
3
67
8
9
10
11
17
4
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
Code Assembly unit
1 Outdoor unit
1.1 Manometer
1.2 Pressure relief valve
1.3 Expansion vessel
1.4 Plate heat exchanger
1.5 Air purge valve
1.6 Flow switch
1.7 PUMP_I: Circulation pump inside the unit
2 <VKDSH¿OWHU
3 6WRSYDOYH¿HOGVXSSO\
4 Wired controller
6 'UDLQYDOYH¿HOGVXSSO\
7 )LOOYDOYH¿HOGVXSSO\
8 %DODQFHWDQN¿HOGVXSSO\
8.1 Air purge valve
8.2 Drain valve
9 ([SDQVLRQYHVVHO¿HOGVXSSO\
10 PUMP_ORXWVLGHFLUFXODWLRQSXPS¿HOGVXSSO\
11 &ROOHFWRUGLVWULEXWRU¿HOGVXSSO\
17 Bypass valve ¿HOGVXSSO\
FHL
1… n
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