Riello NXHM - Page 15

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ENGLISH
8.3 Application 3
Space cooling and heating application with a room thermostat suitable for heating/cooling changeover when connected to the unit.
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water is provided through the domestic hot water tank which is connected to the unit.
----
FHL1 FHL2 ---- FHLn
2
----
FCU1 FCU2 ---- FCUn
3
67
8.1
8.2
8
12.1
12.2
12.3
12
T
13
14
15
16
11
11
19
10
9
4
5
18
12.1
21
20
17
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
5 5RRPWKHUPRVWDW¿HOGVXSSO\
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\
12 Domestic hot water tank ¿HOGVXSSO\
12.1 Air purge valve
12.2 Heat exchanger coil
12.3 Booster heater
13 T5: DHW tank temp. sensor
14 Hot water tap¿HOGVXSSO\
15 PUMP_D: DHW pump¿HOGVXSSO\
16 One way valve¿HOGVXSSO\
17 Bypass valve¿HOGVXSSO\)
18 SV1: 3-way valve¿HOGVXSSO\
19 SV2: 3-way valve¿HOGVXSSO\
20 Solar energy kit¿HOGVXSSO\
21 PUMP_S: Solar pump¿HOGVXSSO\
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. PUMP_O
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For outside circulation pump PUMP_O).
 Pump operation and space heating and cooling
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E\WKHURRPWKHUPRVWDWWKHSXPSZLOOVWDUWRSHUDWLQJDQGWKHXQLWZLOOVZLWFKWRKHDWLQJPRGHFRROLQJPRGH7KHXQLWZLOORSHUDWH
WRDFKLHYHWKHWDUJHWFROGKRWZDWHUOHDYLQJWHPSHUDWXUH,QWKHFRROLQJPRGHWKHPRWRUL]HGZD\YDOYHZLOOFORVHWRSUHYHQWFROGZDWHU
UXQQLQJWKURXJKWKHÀRRUKHDWLQJORRSV)+/
b
CAUTION
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RWKHUFRPSRQHQWV)RUURRPWKHUPRVWDW
:LULQJRIWKHZD\YDOYHLVGLႇHUHQWIRUD1&QRUPDOFORVHGYDOYHDQGD12QRUPDORSHQYDOYH0DNHVXUHWRFRQQHFWWRWKHFRUUHFW
terminal numbers as detailed on the wiring diagram.
7KH212))VHWWLQJRIWKHKHDWLQJFRROLQJRSHUDWLRQFDQQRWEHGRQHRQWKHXVHULQWHUIDFHWKHWDUJHWRXWOHWZDWHUWHPSHUDWXUHVKRXOGEHVHWLQ
the user interface.
 Domestic water heating
Domestic water heating is as described in 8.2 Application 2.