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The boiler’s electronic control system manages the automatic functioning of the solar circuit,
switching on the solar circulation pumps when the temperature difference detected is over 6 ºC.
Also, the “
Solar water tank DHW setpoint temperature
” display option can be used to limit the
maximum desired DHW temperature in the solar hot water tank. When this temperature is reached,
or when the temperature difference between the solar sensor “Scol” and the hot water tank sensor
“Si” is less than 4ºC, the boiler’s electronic control system switches off the solar pumps.
For correct system start-up, the solar circuit is equipped with 2 circulation pumps, one of which has
a timer (BST). When the system has started up, after ensuring that the heat-carrying fluid is flowing
through the entire circuit and the flow is stabilised (15 minutes by default, see “
Starting up the solar
pump with timer
”), the electronic control disconnects the pump with a timer as one pump is
sufficient to maintain the flow, which optimises the solar circuit’s electrical energy consumption.
11.2
Heating Function
In this mode, the boiler can heat up the heating installation. To do this, select the desired boiler
setpoint temperature (see "
Selecting the boiler setpoint temperature
") and the temperature of
room thermostat 1 (
TA1
) or remote control
E20
(if the boiler is equipped with these). The burner
will switch on. When the boiler reaches 60ºC it is ready to heat up the heating installation and will
start up the heating pump for this purpose. The burner will shut down when the boiler reaches the
adjusted setpoint temperature. The heating pump and the burner will stop when the room
temperature reaches or exceeds the temperature set on the installation’s room thermostat (if it has
one). When a hot water tap is turned on, the instantaneous DHW production function is given
priority and begins to function. The heating mode will continue to function, providing the
temperature of the DHW in the solar hot water tank is sufficient.
The boiler heating function can be totally disabled (
Summer
mode) by selecting "
OFF
" as the boiler
setpoint value.
NOTE: When the heating function is disabled, circuit 2 will also be disabled if it is connected.
11.3
Instantaneous domestic hot water production function
In this mode, the boiler provides instantaneous DHW. To activate this mode, select the desired
DHW setpoint temperature (see "
Selecting the DHW setpoint temperature
"). The burner will ignite
until the boiler reaches 60 ºC. If a hot tap is turned on, the instantaneous DHW production system
will start up and provide constant hot water at the selected setpoint temperature. If the solar
energy collected by the boiler has heated up the water stored in the solar hot water tank to higher
than the setpoint temperature selected, the boiler will supply DHW directly from the hot water
tank, at the temperature it is stored at. If the temperature of the water stored in the solar hot water
tank is lower than the setpoint temperature, the hot water will be heated up by the support oil
boiler, supplying instantaneous DHW at the set temperature.
