Special Functions - Riello SC ACS 80 Manual

5.3 Discharge Protection
If the temperature in the primary circuit is not always guaranteed to suffice, this function is used.
With this function activated:
When no storage sensor is connected:
If the setpoint temperature is not reached after 60 seconds, the currently measured temperature -3°C is used as new
setpoint temperature. Once the pump in the primary circuit stops, the setpoint temperature is raised to the set Tset again.
When the storage sensor is connected
If the temperature at the storage sensor is smaller than Tset -5 °C, the target temperature is lowered to the currently
measured storage temperature -5 °C.
In both cases "Circ Tmin" is lowered to the new setpoint temperature - Circ. hysteresis - 5 °C, where "Circ Tmin is not lower
than 0 °C and not higher than the set Circ Tmin.
5.4 Seizing protection
If seizing protection is active, the controller switches on the relay and the connected components for 5 seconds every
day at 12:00 ("Daily" setting), or every Sunday at 12:00 ("Weekly" setting), in order to prevent the pump and/or the valve
from seizing up after a lengthy idle period.
Settings range: Daily, Weekly, Off / Default: see table.

6. SPECIAL FUNCTIONS

Menu "6. Special functions" is used to set basic items and
expanded functions.
b
With the exception of the clock, all settings must be
entrusted solely to expert service technicians. To
quit the menu, press "esc" or select "Exit special
functions".
b
The numbering of the menu items may change from
one system to another.
6.1 Pump menu
This menu contains the settings for 0-10V or PWM pump control.
b
The power supply of HE pumps with 0-10V / PWM pumps can be connected to the corresponding relay (V1 -> R1,
R2 -> V2), since the relays are switched on and off with the signal.
6.1.1 Pump type
This menu is used to set the type of pump and speed control.
0-10V: speed control of e.g. High effi cency pumps by 0-10V signal;
PWM: speed control of e.g. High effi cency pumps by PWM signal.
6.1.2 Pump
In this menu, preconfi gured profi les for various pumps can be selected. Please note that individual settings are still
possible even when a profi le has been selected.
6.1.3 Output signal
This menu determines the type of pump used: Solar pumps perform at their highest power when the signal is also maxed,
heating pump on the other hand are set to highest power wenn the control signal is at the lowest. Solar = normal, heating
= Inverted. For 0-10V pump is always to select the "Normal" setting.
6.1.4. 0-10V off / PWM off
This signal / this voltage is put out when the pump is switched off (Pumps that can detect cable break need a minimum
signal).
6.1.5. 0-10V on / PWM on
This signal / this voltage is needed to turn the pump on at minimum speed / minimun voltage.
6.1.6. 0-10V Max / PWM Max
This determines the output signal / the output voltage for the highest speed of the pump, that is used e.g. during purging
or manual operation.
6.1.7. Show signal
Displays the set signal in text and a graphical diagram.
6.2 Speed control
The settings in this menu are used to limit the speed of connected 0-10V and PWM pumps.
6.2.1 Max speed
This is where the maximum speed of the pump is set. During the setting procedure, the pump runs at the selected speed
so that the flow rate can be determined.
b
The indicated percentages are guide values that may vary to a greater or
6.Exit special function
6.1.Pump settings V1
6.2.Speed control V1
20
OK
esc