Evolution Solar HDX
24
Also, the “
Maximum 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.
8.2
Heating Function
In this mode, 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 and the heating pump of circuit 1 (
BC
1
) will begin to function
until the installation reaches the selected boiler setpoint temperature (or the temperature on room
thermostat, if the unit has one). When the temperature of the installation drops below the selected
boiler temperature, the burner will start up again, running the heating cycle.
If the DHW temperature in the boiler’s integrated back-up hot water tank is lower than the DHW
setpoint temperature selected, the heating function will cut out and priority will be given to
domestic hot water production, starting up the hot water tank feed pump.
The boiler heating function can be totally disabled (
Summer
mode) by selecting "
OFF
" as the boiler
setpoint value. In this operating mode, only the DHW production function will remain enabled,
providing there is a DHW tank connected to the boiler.
NOTE: When the heating function is disabled, circuit 2 will also be disabled if it is connected.
8.3
Domestic Hot Water production function of tank
In this mode to activate this mode, select the desired DHW setpoint temperature (see "
Selecting the
DHW setpoint temperature
"). The burner will igniteand and the DHW pump. When the tank reaches
the setpoint temperature selected it was ready to heat the heating circuit if it was on.
If you wish to totally disable the boiler’s DHW production function, select the setpoint value "
OFF
".
In this case DHW will only be produced by the boiler’s solar heating system.
