Riello NXHM - Page 6

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ENGLISH
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DANGER
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 When service panels are removed, live parts can be easily touched by accident.
 Never leave the unit unattended during installation or servicing when the service panel is removed.
 Do not touch water pipes during and immediately after operation as the pipes may be hot and could burn your hands. To avoid injury,
give the piping time to return to normal temperature or be sure to wear protective gloves.
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 Before touching electrical parts, turn o all applicable power to the unit.
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 Safely dispose of packing materials such as nails and other metal or wood parts that could cause injuries.
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injury.
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result in accidents due to equipment falling.
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 Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground fault circuit interrupter
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 When wiring the power supply, form the wires so that the front panel can be securely fastened. If the front panel is not in place there could
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 After completing the installation work, check to make sure that there is no refrigerant leakage.
 Never directly touch any leaking refrigerant as it could cause severe frostbite.
 Do not touch the refrigerant pipes during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the
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sible if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must touch them,be
sure to wear protective gloves.
Explanation of abbreviations used
Abbreviations 'H¿QLWLRQV
T1 Total water outlet temperature of hydraulic module (after electrical heating outlet or
gas boiler outlet)
T1S Water outlet setting temperature (Single zone installation)
Zone 1 outlet water setting temperature (Dual-zone installation)
T1S2 Zone 2 outlet water setting temperature (Dual-zone installation)
T2 Hydraulic module refrigerant liquid side temperature
T2B Hydraulic module refrigerant gas side temperature
T5 Tank temperature
Tw_out Plate heat exchanger outlet temperature
Tw_in Plate heat exchanger inlet temperature
TW2 Zone 2 outlet temperature
T4 Outdoor environment temperature
PUMP_I Built-in water pump in hydraulic module
PUMP_O
External water pump for single-zone system
Zone water pump for dual-zone system
PUMP_C Zone 2 water pump for dual-zone system
PUMP_S Solar system water pump
PUMP_D Pipe net water return pump
IBH Electric backup heater
TBH Tank booster heater in DHW tank
AHS External heat source
SV1 Three - way valve of DHW and air conditioning switching
SV2 Three - way valve, heating zone-cooling zone
SV3 Mixing valve for zone2 (low temperature zone)