Installation, use and maintenance guide
PIDRA 18
Page
29
ENG
In this case the room temperature sensor controls the activation of the ON/OFF cycle for the appliance according to the set
temperature.
If the dwelling is fitted with zone valves, with this type of installation, it is mandatory to deactivate the valves by opening them
completely.
Consequently the dissipation of heat, at least equal to or greater than the minimum power output to the water in the appliance, must
be guaranteed at all times.
6.9 THERMO ACS: CONTROLLING A CONFIGURED BOILER TUBE IN A SYSTEM
The appliance must be energised and the main switch in position [
I
] .
This function enables control of the operating temperature of a boiler tube for the production of domestic hot water (ACS) through
the use of a sensor PT 100 (optional) connected to the appropriate terminal block (see dedicated paragraph).
When this function is activated the appliance automatically controls the diverting valve to give priority to the domestic hot water.
Once the boiler tube is satisfied, the appliance switches the diverting valve to the system or the puffer (if installed) if they require
heat.
ATTENTION:
If the optional sensor is not connected to the appliance or if it is interrupted, it will not be possible to view and
consequently activate the THERMO ACS function.
The THERMO ACS function can be activated by proceeding as follows:
1) Quickly press the
Menu Button
until the following screen appears:
:
After a few seconds the following screen will appear on the display:
2) Press one of the two
Scroll Buttons
and the following screen will appear (Select ON to activate).
3) Confirm the selection by pressing the
Degrees Button
and the following screen will appear:
4) Press the
Scroll Buttons
to set the minimum activation temperature for the sensor. The sensor is installed in the central
part of the boiler tube and commands the appliance to start the boiler if it is off. On the other hand if the appliance is
operating, it commands the diverting valve as the available heat inside it is coming to an end. The setting range is from
45°C to 65°C.
5) Confirm the selection by pressing the
Degrees Button
and the following screen will appear.
6) Press the
Scroll Buttons
to set the maximum activation temperature for the sensor. The sensor commands the appliance
to shut off if it is ON, whereas if the appliance is operating, it commands the diverting valve as the boiler tube is satisfied.
The setting range is from 49°C to 75°C.
Attention: The maximum temperature will always exceed, by at least 4°C, the minimum set temperature.
7) Confirm the selection by pressing the Degrees Button followed by the Menu Button.
At this point the appliance operating status will appear on the display.
To
disable
the THERMO ACS unction simply repeat operations 1 and 2 selecting the OFF command. The function will be disabled
immediately.
When this function is activated the appliance operates at the automatic power when the domestic hot water boiler tube is requesting
heat, it then reverts back to the power selected by the user when the boiler is satisfied.
ATTENTION:
The boiler tube must have at least a 300 litre capacity.
If the optional sensor is not connected to the appliance or if it is interrupted, it will not be possible to activate this
function.
Pay special attention to the number of ON/OFF cycles that the appliance is subjected to with this function. It is
recommended not to exceed three ON/OFF cycles. If the startups are frequent and repeated it is possible that the
generator will fail to start and the following error message appear: “Failed start – Clean burner”. The appearance of this
message is not attributable to a product defect but is caused by a brazier that requires cleaning as described in this
m
anual in chapter entitled: “Troubleshooting – Possible Causes – Solutions”.
