Riello NexPro Plus, Installation And Maintenance Manual

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STARTING AND USE
NOTE: in the navigation diagram, near parameter Ho3, it is
possible to see the days passed since the last antibacterial
treatment .
The activation is not possible if FAST HEATING or HIGH TEMPERA-
TUREfunctions are already enabled.
3 .13 Holiday function
It checks that the temperature inside the accumulation tank
does not drop below a minimum value (default 4°C) avoiding
any risks of water freezing.
To activate the HOLIDAY function, press [FUNCTION] key until
LED L15 flashes, then press [SET] key to confirm. LED L15 re-
mains steady on. The function can be activated in AUTO or MAN-
UAL mode.
3 .14 High temperature function
It allows to increase the water temperature to Ut4 > Ut1 value
through the heating element or the boiler.
To activate the HIGH TEMPERATURE function, press [FUNCTION]
key until LED L8 flashes, then press [SET] key to confirm. LED L8
remains steady on.
The unit works with the heat pump only until Ut1 value is reached
and then works using the heating element or the boiler to reach
Ut4 set according to the setting of parameter H50. The activation
is not possible if ANTI-LEGIONELLA or FAST HEATINGfunctions are
already enabled. To disable HIGH TEMPERATURE function press
[FUNCTION] key until LED L8 flashes, then press [SET] key to
confirm; you will go back to the mode previously set (AUTO or
MANUAL).
3 .15 Clock function
It allows to set day, hours and minutes. To activate CLOCK func-
tion:
− press and hold [FUNCTION] key until LED L9 flashes, then
press [SET] key to confirm. LED L9 remains steady on.
The display shows the day in flashing mode
− press [UP] and [DOWN] keys to set the desired day
− press [SET] to confirm
Sun Mon TuE VEd thu fri sat
− The display shows hours and minutes
− press [UP] and [DOWN] keys to change the time
− press [SET] to confirm
3 .16 Hourly programming
3 .16 .1 5-day time interval
It allows to activate a singledaily hourly programme to activate
the unit valid from Monday to Friday, according to the following
steps:
− press [FUNCTION] key until flashing LED L10 is displayed
− press [SET] to confirm the selection; LED L10 is steady
on, whereas LED L13 (ON from time interval) and the time
on display are in flashing mode
− press [UP] and [DOWN] keys to change the activation
time
− press [SET] to confirm hours and minutes, then LED L13
turns steady on.
To delete the setting, press [FUNCTION] key.
Once the starting time is set, LED L14 (OFF from time interval)
turns flashing on:
− press [UP] and [DOWN] keys to change the deactiva-
tion time
− press [SET] to confirm, then LED L14 turns steady on.
To delete the setting, press [FUNCTION] key.
At the end of programming, the display shows the current tem-
perature since it is in OFF mode.
3 .16 .2 2-day time interval
It allows to activate a daily hourly programme to activate the
unit valid from Saturday to Sunday, according to the following
steps:
− press [FUNCTION] key until flashing LED L11 is displayed
− press [SET] to confirm the selection; LED L11 is steady on,
whereas LED L13 (ON from time interval) and the time on
display are in flashing mode
− press [UP] and [DOWN] keys to change the activation
time
− press [SET] to confirm hours and minutes, then LED L13
turns steady on.
To delete the setting, press [FUNCTION] key.
Once the starting time is set, LED L14 (OFF from time interval)
turns flashing on:
− press [UP] and [DOWN] keys to change the deactiva-
tion time
− press [SET] to confirm, then LED L14 turns steady on.
To delete the setting, press [FUNCTION] key.
At the end of programming, the display shows the current tem-
perature.
3 .17 Autostart function
The Autostart function allows the unit to automatically restart
after a shut-down due to a power failure.
9
It is possible to enable / disable the autostart function set-
ting the parameter H23.
3 .18 Dynamic Setpoint function
The controller allows changing the Set Point automatically ac-
cording to external conditions. This change is obtained by sub-
tracting to set point a value based on the outdoor air tempera-
ture measured by the probe (S02).
9
It is possible to enable / disable the function setting the pa-
rameter H33.