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3.20 SOLAR PANELS COUPLING
The device is set up to receive pre-heated water from a system of solar panels up to a maximum temperature of 65°C. In any case, it is al-
ways necessary to install a mixing valve on the hydraulic circuit upstream of the device, on the cold water inlet.
Set the parameter t3 (solar delay time) to a sufficient time to allow the water in the DHW circuit upstream of the boiler to drain off.
The greater the distance from the storage tank, the longer wait time will have to be set.
When these adjustments have been made, when a DHW withdrawal is requested, when the time set in parameter "t3" has elapsed, the
boiler switches on.
If the water entering the boiler has a temperature equal to or higher than that set, the boiler will not switch on.
In order for the boiler to work properly, the temperature selected on the mixing valve must be 5°C higher than the temperature
selected on the boiler control panel.
3.21 PUMP ANTI-BLOCK
The appliance has a function that starts up the pump at least once every 24 hours for 30 seconds in order to reduce the risk of the pump
locking up due to prolonged inactivity.
When "OFF" operating status is selected, this function can be deactivated by means of the parameter P.8.
3.22 THREE-WAY ANTI-BLOCK
The appliance has a function that activates the motorised 3-way unit 24 hours after the last time it operated by running a complete cycle in
order to reduce the risk of the 3-way blocking due to prolonged inactivity.
When "OFF" operating status is selected, this function can be deactivated by means of the parameter P.8.
3.23 RADIATOR ANTIFREEZE
If the system return water is below 4°C, the appliance starts up until reaching 42°C.
When "OFF" operating status is selected, this function can be deactivated by means of the parameter P.8.
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