Riello SC ACS 80 Manual page 22

Adjustable flow rate in l/h, at which the additional pump is switched on.
6.5.8.3. Flow rate off
Adjustable flow rate in l/h, at which the additional pump is switched off.
6.5.8.4. Delay
The additional pump is switched on with a delay of the time set here.
6.5.9 Primary mixer
By activating this function, the water in the primary circuit is mixed with that of the return through a mixing valve.
In this way, in the event of high storage temperatures, the water reaches the user with a lower amount of heat, because
mixed with the return.
6.5.9.1. Primary mixer
Switch primary mixer on or off
6.5.9.2. Primary flow min
Setpoint temperature at mixing valve at min. flow rate
6.5.9.3. Primary flow max
Setpoint temperature at mixing valve at max. flow rate
6.5.9.4. Turn time
Length of a mixer cycle
6.5.9.5. Pause factor
Adjustment of mixer pause time
6.5.9.6. Increase
Influence of fast temperature rises
6.5.10. Solar
This function adds a solar circuit which is controlled by the collector and storage temperature.
6.5.10.1. Solar
Switch solar on or off.
6.5.10.2. Tmin collector
Release temperature collector sensor: If this value is exceeded at the given sensor and also the other conditions are met,
the controller activates the corresponding pump.
6.5.8.3. ΔT Solar
Switch-on / Switch-off temperature difference for collector sensor:
If the temperature difference ΔT Solar is exceeded between the reference sensors and if also the other conditions are
met, the controller activates the pump on the corresponding relay. If the temperature difference falls to ΔT off, the pump
is switched off again.
6.5.8.4. Tmax storage
If the (lower) storage temperature set here is exceed, the controller switches the pump off.
6.5.8.5. Start aid function
With some solar systems, especially with vacuum tube collectors, it may occur that the measurement value acquisition
at the collector sensor occurs too slowly or too inaccurately because the sensor is often not at the hottest position. When
the start help is activated the following sequence is carried out: If the temperature at the collector sensor increases by
the value specified under "Increase" within one minute, then the solar pump is switched on for the set "Purging time" so
that the medium to be measured can be moved to the collector sensor. If this still does not result in a normal switch-on
condition, then the start help function is subject to a 5-minute lockout time.
b
This function should only be activated by a specialist if problems arise with acquisition of measurement values. In
particular follow the instructions of the collector manufacturer.
6.5.10.6. System protection
Priority protection function
The system protection prevents the installed components in the system from overheating by automatic shutdown of the
solar pump.
6.5.10.6.1. System protection
Switch system protection on or off.
6.5.10.6.2. SP Ton/off
If the value "SP Ton" is exceeded at the collector, the pump is switched off after 60 seconds and will not be switched on
again, in order to protect the collector e.g. from steam hammering. The pump will only be switched on again, when the
collector temperature falls below "SP Toff".
6.5.11. Parallel operation V1
The relais is switched on at the same time as the set output signal V1/V2 for 0-10V/ PWM is switched on.
b
For high-effi ciency pumps with 0-10V / PWM signal input, power supply can be realised by using the additional
function „always on" or „parallel operation" for relay 1-3.
6.5.11.1. Parallel operation V1
Activate this function further it is possible to activate this function inverted.
6.5.11.2. Delay
The relay switches on after this delay time.
22