Evolution Solar HDX
28
The E20 remote control takes over the control of the boiler when it is connected to it. The different
selectable boiler temperatures must be modified using the remote control. It is easy to install, only
requiring 2 wires for communication between the boiler and the E20 control. It is connected to the
boiler by connecting the two wires on terminal strip
J4
(see “Electrical Connection Diagram”). For
correct installation and functioning, carefully read the instructions enclosed with the remote control.
The following sections contain a general explanation of the E20 remote control’s different operating
modes and options.
10.1
Functioning without an outdoor sensor
Conventional heating installation (direct circuit)
The maximum temperature for heating circuit 1, the scheduled heating times and the desired
room temperatures can be selected on the remote control. The E20 remote control will calculate
the boiler temperature required at each particular time, depending on the temperature of the
room, and it will activate or disable the heating mode of circuit 1 depending on the heating
times and room temperatures programmed.
Heating installation with an SRX2/EV underfloor heating kit (mixed circuit)
If the boiler has an SRX2/EV Underfloor Heating Kit installed on circuit 1, the underfloor heating
circuit is adjusted and controlled from the boiler control panel (see "
Functioning with an
underfloor heating kit
").
The E20 remote control can be used to programme the desired heating times and room
temperatures.
10.2
Functioning with an external sensor (Optional)
If the E20 remote control is fitted with an outdoor temperature sensor, it can calculate the heating
temperature of heating circuit 1 according to the outside weather conditions at each particular
time, with optimum adjustment of the heating installation conditions for improved comfort in the
home and energy savings.
Conventional heating installation (direct circuit)
The maximum temperature, an operating curve for heating circuit 1 (see instructions enclosed
with the E20 remote control) and the desired heating times and room temperatures can all be
selected on the remote control. The E20 remote control calculates the required boiler
temperature at each particular time, depending on the temperature inside the home and the
outside weather conditions, in accordance with the operating curve selected (setting
HEATSLOPE 1 on the E20), switching the heating on and off in accordance with the heating times
and the room temperatures programmed.
Heating installation with an SRX2/EV underfloor heating kit (mixed circuit)
If the boiler has an SRX2/EV underfloor heating kit installed on circuit 1 and the control of this kit
is activated on the E20 remote control using the HEATSLOPE 2 setting (see instructions enclosed
with the E20 remote control), the adjustment and control of the underfloor heating circuit flow
temperature will be performed by the remote control. The E20 will calculate the required flow
temperature at each particular time, depending on the temperature inside the home and the
outside weather conditions, in accordance with the operating curve selected (the HEATSLOPE 2
setting on the E20 remote control). For mixed underfloor heating circuits, we recommend
selecting operating curves of less than 0.8.
The boiler setpoint temperature will be fixed at 75ºC and can be changed using the boiler
control panel. This setpoint temperature can be changed by using the MODE touch button to
browse to the “
boiler setpoint temperature
" display option. When the display shows this option,
touch the "+ /-" symbols to select the desired temperature.
