15
11.3
Selecting the Underfloor Heating flow setpoint temperature (with SRX2/EV kit option)
If the boiler is supplied with an integrated SRX2/EV underfloor heating kit, the desired flow
temperature of the installation can be selected using the touch button as shown in the figure
above. To select the desired temperature, touch the "
+
" or "
-
" symbols to increase or decrease the
temperature respectively. When the temperature has been selected, the display will return to
standby mode after a few seconds.
The installation flow setpoint temperature can also be selected by using the MODE touch button to
browse to the “
underfloor heating installation flow setpoint
" display option. When this option
appears on the display, touch the "+ /-" symbols to select the desired temperature.
If you wish to disable the underfloor heating circuit function, select the setpoint value "
OFF
" by
touching the "-" symbol until this value appears on the display.
The flow setpoint temperature range permitted is OFF and 0 - 45ºC. To obtain optimum
performance from the underfloor heating system installed, we recommend selecting a setpoint
temperature of 25 - 35 ºC, providing this is permitted by the heating system installed and the
insulation in your home.
12
OPERATION
The
Evolution EV HFDX
boiler is designed to heat a heating installation and provide domestic hot
water by solar collection. Optionally, a second heating circuit, heating circuit 2, may be connected to
the installation to improve its performance.
12.1
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 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.
