Operating Mode - Riello SC ACS 80 Manual

3. OPERATING MODE

Menu "3. Operating mode" allows selection of the desired
mode of operation: automatic, off, or manual.
To quit the menu, press "esc" or select "Exit operating
mode".
3.1 Automatic
Automatic is the normal operating mode of the controller.
Only automatic mode guarantees correct operation of the
system, taking account of the current temperatures and
the selected parameter settings!
When restarted following a mains power failure, the controller will revert automatically to the operating mode last selected!
3.2 Manual
The relay — and the component connected to the relay contacts — are switched on or off by pressing a key, regardless
of current temperatures and parameter settings. Measured temperatures are also displayed on the screen, for monitoring
and control purposes.
b
When "Manual" mode is activated, current temperatures and parameter settings are ignored by the controller. In this
situation, the system is liable to overheat and suffer serious damage. "Manual" operating mode must be used only
by an expert for conducting functional tests of short duration, or when setting up the controller!
3.3 Off
b
Selecting "Off" mode, all functions of the controller will be deactivated. This should be avoided normally, as it could
cause the solar collector or other system components to overheat, for example. Measured temperatures continue
to be displayed so that the overview remains available.
4. SETTINGS
The parameters essential to normal operation of the con-
troller are presented in menu 4. "Settings".
b
This does not under any circumstances replace the
safety facilities to be provided by the customer!
To quit the menu, press "esc" or select "Exit settings".
4.1 Tset = Setpoint at VFS sensor
The controller LFWC provides this hot water temperature
(tap temperature) constant and as soon as possible.
4.2 Tmax = Maximum draw-off temperature at the vortex flow sensor
The controller LFWC provides this hot water temperature ( tap temperature ) constant and as soon as possible.
b
Temperature values which are set too high can lead to scalding or damage to the system. Scalding protection must
be provided by the customer!
4.3 VFS type
Set the type of Vortex Flow Sensors.
In this menu the type of Vortex Flow Sensor can be set.
4.4 Recirculation
4.4.1 Recirculation
When the mode "Request" is active, the circulation pump is switched on after a corresponding tapping of water has
occured and stays on until the circulation target temperature (Circ Tmin + hysteresis) is reached at the circulation sensor.
In mode "Periods" the circulation pump is enabled in the set periods and the set circulation minimum temperature is un-
dershot and stays on until the circulation target temperature (Circ Tmin + hysteresis) is reached at the circulation sensor.
Request+Time: The circulation pump is switched on in the enabled periods and the set circulation minimum temperature
is undershot, or when water is tapped. Circulation stays on till the circulation target temperature (Circ Tmin + hysteresis)
is reached at the circulatiopn sensor.
Always on: Circulation pump is switched on in set periods.
4.4.2 Circ. Tmin. = Minimum temperature at sensor S2
If the temperature drops below Circ.Tmin and the circulation is enabled the circulation pump is started.
3.Exit operating mode
3.1.Auto
3.2.Manual
4.1.Tset
4.2.Tmax
18
Info
esc
4.Exit settings
45°C
60°C
Info
esc