DOMUSA TEKNIK AVANTTIA HDX, Operation & User’S Manual

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11
5 ADDITIONAL FUNCTIONS
The Avanttia boiler has the following additional control functions:
5.1 Antilegionella function
Using the P.17 parameter, it is possible to activate the function of protection against Legionella
bacterium. With the feature enabled, every 7 days, DHW tank temperature rises up to 65 ºC.
5.2 Pumps anti-block function
This feature prevents the boiler circulation pumps from seizing up if they have been out of use for a
long period. This system remains enabled while the boiler is plugged into the mains.
5.3 Anti-frost function
This function protects the boiler from freezing up during cold weather. If the boiler temperature
drops to below 6 ºC, the heating circulation pump will start up. If the boiler temperature continues
to drop and reaches 4 ºC, the burner will start up, heating the installation. When this function has
been activated, it will continue working until the boiler reaches 8 ºC. This system remains on
standby while the boiler is plugged into the mains.
5.4 Boiler pressure sensor function
This function prevents boiler failure caused by a low water level and excess pressure in the boiler.
The pressure is detected by a pressure sensor, and its value appears on the control panel display
(on the
“User Menu”
). If the pressure drops below 0.05 MPa (0.5 bar), the electronic control switches
off the boiler and triggers an alarm on the display (" E02 "). When the boiler pressure exceeds 0.25
MPa (2.5 bar), an alarm is triggered on the display (" HI ") to warn of the excess pressure. If this should
occur, we recommend calling the nearest Technical Assistance Service , and draining the boiler
until the pressure is between 0.1 and 0.15 MPa (1 and 1.5 bar).
5.5 Resetting to factory default values
If these settings are wrongly adjusted or if the boiler functions incorrectly, all the original settings of
all the parameters can be restored by selecting oH in parameter
P.26 .
5.6 Connecting the LAGO FB OT+ remote control
The boiler has a terminal strip, J5 , for connecting the LAGO FB OT+ remote control (see
"Connection Diagram”
). This allows the heating mode for circuit 1 to be switched off, according to
the room temperature.
Installing the LAFO FB OT+ remote control enables the heating and DHW system to adapt to the
scheduled times for use of the installation. It also optimises the installation’s functioning, adapting
the heating setpoint temperature to the room temperature and improving comfort.
5.7 Room thermostat connection
The boiler has two terminal strips, J4 and J6 , for connecting room thermostats or room
chronothermostats (TA
1
and TA
2
, see "Electrical Connection Diagram”). This allows the heating
mode for each circuit installed to be switched off according to the room temperature. To connect it,
remove the bridge joining the terminals of each terminal strip,
J4 and J6 , and connect room
thermostat Nº 1 or Nº 2 for circuits 1 or 2 respectively.
Installing a room thermostat will optimise the performance of the installation, adapting the heating
to your home’s requirements and obtaining enhanced comfort. Also, if the thermostat allows the
hours of functioning to be programmed (chronothermostat), it can adapt the heating system to the
hours of use of the installation.