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ENGLISH
b
The user must make sure that the Anti-legionella function terminates successfully at the set periods.
b
The AL function is switched off by default. A message containing the date is shown as soon as the AL function ter-
minates successfully. The AL start time should be set during a period in which little hot water is drawn off.
b
The user must make sure that the temperature of the storage cylinder is at AL Tset +5° when starting the AL cycle
manually. If sensor S3 is installed, the AL function will not start until a temperature of AL Tset +5° is reached.
b
The AL function does not provide total protection against legionella because is not possible to monitor temperatures
throughout the storage cylinder and in all connecting pipes.
5.2 Limescale protection
To prevent the accumulation of limescale, the pump can be set to continue pumping water through the heat exchanger
after a draw-off of between 5 and 30 seconds or until the temperature at the VFS drops below Tset. Settings range: On,
Off / Default: see table.
5.3 Setpoint auto-regulation
This function is used if the primary circuit does not always reach the required temperature.
With this function active:
If no storage sensor is connected:
If setpoint temperature is not reached after 60 seconds, setpoint temperature minus 3 °C is assumed as a new setpoint.
When the primary circuit pump stops, setpoint temperature is returned to the original Tset value.
If a storage sensor is connected:
If the temperature measured by the storage sensor is below Tset - 5 °C, the setpoint is lowered to setpoint minus 5 °C.
In both cases, “Tmin recirculation” is lowered to the new setpoint temperature – recirculation hysteresis minus 5°C, at
which “Tmin recirculation” is no lower than 0°C and no higher than the Tmin recirculation setpoint.
Settings range: On, Off / Default: see table.
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 values
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 V1
This menu contains the settings for 0-10V or PWM pump control.
b
The power supply for high efficiency pumps using 0-10V / PWM control can be connected to the corresponding
relay (V1 -> R1, R2 ->V2), since the relays are activated and deactivated 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 using 0-10V signal;
PWM: speed control using PWM signal.
6.1.2 Pump
This menu allows the selection of preconfigured profiles for different pumps. In practice, the single settings remain acces-
sible even when a profile has been selected.
6.1.3 Output signal
This menu determines the type of pump in use: solar pumps deliver maximum power with a high control signal, whereas
conversely, heating pumps operate at their maximum power rating when the control signal is at its lowest.
Solar = normal, heating = inverted.
Settings range: normal, inverted / Factory setting: see table.
6.1.4. PWM off
This signal is deactivated when the pump shuts off (Pumps capable of detecting a cable break require a minimum signal)
6.Exit special function
6.1.Pump V1
6.2.Speed pump V1
esc
Info
Summary of Contents for MODEX ACS 40 E
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