Riello NXHM - Page 19

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ENGLISH
NOTE
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STAT.
 It is the installers’ responsibility to ensure that no unwanted situations can occur (e.g. extremely high temperature water going towards
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ted heating in zone B.
 When only zone B requests heating, the mixing station will be fed with water at a temperature equal to the second set point.Depending
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station.
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8.6 Application 6
Dual setpoint function application without room thermostat connect to the outdoor unit.
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water temperatures.
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the unit (or buy from the market, controlled by itself).
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2
3
67
8.1
8.2
8
10
9
11
11
FHL1 FHL2 FHLn
FCUnFCU2FCU1
17
4
23.1
23
23.2
24
A
B
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\
23 Mixing station ¿HOGVXSSO\
23.1 PUMP_C: zone 2 pump¿HOGVXSSO\
23.2 SV3: 3-way valve¿HOGVXSSO\
24 TW2: ]RQHZDWHUÀRZWHPSHUDWXUH (accessory)
FHL
1… n
)ORRUKHDWLQJORRS¿HOGVXSSO\
FCU
1… n
)DQFRLOXQLWV¿HOGVXSSO\
NOTE
 The volume of balance tank (8) should be greater than 40l. The drain valve (6) should be installed at the lowest positon of the system .
 As the temperature sensor attached in the user interface is used to detect the room temperature, the user interface (4) should be placed in
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page of user interface, the second setpoint is calculated from climate related curves, the target outlet water temperature is the higher one of
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Pump operation and space heating
 PUMP_I
(1.7) and PUMP_O ZLOORSHUDWHZKHQWKHUHLVUHTXHVWIRUKHDWLQJIURP$DQGRU% PUMP_C (23.1) will operate when the
room temperature of zone B is lower than the set point which set in the user interface. The outdoor unit will start operating to achieve
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