Riello NXHM - General Introduction; Cooling Mode; Heating Mode

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ENGLISH
2 GENERAL INTRODUCTION
 These units are used for both heating and cooling applications and domestic hot water tanks.They can be combined with fan coil
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supplied.
 A wired controller is supplied with the unit.
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the installation place).
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 Operation range.
COOLING MODE
HEATING MODE
Outdoor temperature(°C)
Water flow temperature (°C)
Outdoor temperature(°C)
Water flow temperature (°C)
DOMESTIC WATER HEATING MODE
Outdoor temperature(°C)
Water flow temperature (°C)
If IBH/AHS setting is valid, only IBH/AHS turns on.
If IBH/AHS setting is invalid, only heat pump turns on.
No heat pump operation, IBH or AHS only.
Water flow temperature drop or rise interval.
 If you add an optional backup heater unit, the backup heater can
increase the heating capacity during cold outdoor temperature.
The backup heater also serves as a backup in case of malfun-
ctioning and for frozen protection of the outside water piping du-
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is listed below.
Tbivalent Outdoor temperature
Capacity/Load
Ĺ
ĸ
ķ
1 Heat pump capacity.
2 Required heating capacity (site dependent).
3 Additional heating capacity provided by backup heater.
 The unit have a freeze prevention function that uses the heat
pump to keep the water system safe from freezing in all condi-
tions. Since a power failure may happen when the unit is unat-
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ter system (refer to 9.4 Water piping).
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re (T4) is listed below:
Outdoor temp. (°C)  11 12 13
:DWHUÀRZWHPS& 10 9 98
Outdoor temp. (°C) 14 15 16 17
:DWHUÀRZWHPS& 8 776
Outdoor temp. (°C) 18 19 20 
:DWHUÀRZWHPS& 6655
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rature (T4) is listed below:
Outdoor temp. (°C) -25 -24 -23 -22
:DWHUÀRZWHPS& 35 35 35 37 39
Outdoor temp. (°C) -20 -19
-18 -17
:DWHUÀRZWHPS& 40 42 44 46 48
Outdoor temp. (°C) -15
-14 -13 -12
:DWHUÀRZWHPS& 50 52 54 56 58
Outdoor temp. (°C) -10~30 31 32
:DWHUÀRZWHPS& 60 59 58 57
Outdoor temp. (°C) 34 35
:DWHUÀRZWHPS& 56
55
 In DHW mode, the maximum domestic hot water temperature
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ture (T4) is listed below:
Outdoor temp. (°C) -25~-21 -20~-14 -15~-11 -10~-4 -5~-1
'+::DWHUÀRZWHPS& 35 40 45 48 50
Outdoor temp. (°C) 0~4 5~9 10~14 15~19 20~24
'+::DWHUÀRZWHPS& 53 55 55 53 50
Outdoor temp. (°C) 25~29 30~34 35~39 40~43
'+::DWHUÀRZWHPS& 50 48 48 45