Anti-Legionnaire's Disease Protection (Function Activated Only Through The Installer Menu) - Ariston NUOS 200 EXT Instructions D'utilisation

Heat pump water heater – OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
Name
Parameter
P0 CODE
T Max
P1
P2 T Min
P3 T HP
P4 GREEN
P5 ANTI_B
P6 VOYAGE
P7 DEFROS
P8 HC-HP
P9 TIME_W
P10 RESET

7.7 Anti-legionnaire's disease protection (function activated only through the installer menu)

If activated, the water heater automatically carries out the anti-legionnaire's disease protection function. The water is
brought to a temperature of 65°C on a monthly basis and for a maximum time of 15 minutes, so as to avoid germs
from developing in the water tank and piping (provided the water has not been brought to T>57°C at least once for at
least 15 minutes). The first heating cycle is performed 3 days after the function has been activated. As these
temperatures may cause burns, it is advisable to use a thermostatic mixer.
Code entering to access the installer menu. The number 222 appears on the display: turn the
knob until reaching number 234 then press the knob. It will then be possible to access the
installer menu.
Adjustment of the maximum obtainable temperature (from 65°C to 75°C).
A higher temperature value allows for using a greater amount of hot water.
Adjustment of the minimum obtainable temperature (from 50°C to 40°C).
A lower temperature setting allows for more energy-efficient operation in the event of limited
hot water consumption.
Adjustment of the maximum temperature obtainable with the heat pump unit (from 50°C to
62°C). Bear in mind that operating at temperatures above 55°C with the heat pump may lead
to greater wear of the compressor.
Activation/deactivation of the Green function (on/off).
See Paragraph 7.4.
Activation/deactivation of the Anti-Legionnaire's Disease function (on/off).
See Paragraph 7.7.
Activation/deactivation of the Voyage function (on/off).
See Paragraph 7.4.
Activation/deactivation of the defrost mode (on/off).
If activated, this mode allows the heat pump to function at air temperatures as low as -5°C.
Activation/deactivation of the two-tier rate operation mode.
See Paragraph 7.9.
Maximum number of hours of daily heating (from 5h to 24h).
Resetting of all factory default settings, remember to reset P7 to ON.
Parameter description
66