Riello NXHM - Space Heating; Domestic Water Heating

76
ENGLISH
8.2 Application 2
Space heating without room thermostat connected to the unit. Domestic hot water tank is connected to the unit, and the tank is with
solar heating system.
12.3
12.2
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FHL1 FHL2
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FHLn
12.1
12.1
2
3
67
8.1
8.2
8
9
12
13
14
15
16
10
11
20 21
4
17
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
18
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\
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\
20 Solar energy kit¿HOGVXSSO\
21 PUMP_S: Solar pump¿HOGVXSSO\
FHL
1… n
)ORRUKHDWLQJORRS¿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).
 Circulation pump operation
The circulation pump (1.7) and (10) will operate as long as the unit is on for space heating.
The circulation pump (1.7) will operate as long as the unit is on for heating domestic hot water (DHW).
 Space heating
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2) The bypass valve (18)VKRXOGEHVHOHFWHGVRWKDWDWDOOWLPHVWKHPLQLPXPZDWHUÀRZDVPHQWLRQHGLQ:DWHUSLSLQJLVJXDUDQWHHG
 Domestic water heating
1) When the domestic water heating mode is enabled (either manually by the user, or automatically through scheduling) the target domestic
hot water temperature will be achieved by a combination of the heat exchanger coil and the electrical booster heater (when the booster
heater in the tank is set to YES).
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water by means of the heat pump. If there is a huge demand for hot water or a high hot water tempera- ture setting, the booster heater
(12.3) can provide auxiliary heating.
b
CAUTION
0DNHVXUHWR¿WWKHZD\valve (18)FRUUHFWO\)RUPRUHGHWDLOVUHIHUWR&RQQHFWLRQIRURWKHUFRPSRQHQWV)RUZD\YDOYH69
NOTE
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FLW\RIWKHKHDWSXPSLVDYDLODEOHIRUVSDFHKHDWLQJ'HWDLOVRQGRPHVWLFKRWZDWHUWDQNFRQ¿JXUDWLRQIRUORZRXWGRRUWHPSHUDWXUHV7'+:0,1
FDQEHIRXQGLQ)LHOGVHWWLQJV+RZWRVHWWKH'+:02'(