Loading cycle of a boiler with one level probe: The loading function regulates and controls the correct level of water in the boiler.

If the level probe in not covered by water, then the pump and solenoid valve output are simultaneously activated. When   the probe is reached by water, the pump and solenoid valve output are deactivated and remain switched off until the status of the probe changes again. The loading function remains activated for a maximum of 150 seconds (so called time-out). After this period of time the pump and solenoid valve outputs are deactivated in order to protect the machine from eventual breaks or malfunctioning.

Both an acoustic alarm and a LED indicate the malfunctioning.

In addition to the regulation of the pump, also the resistance is managed: it is activated if the minimum level probe is covered and deactivated if not. If the time-out period expires also the resistance is switched off.

Security management of the resistance:

If there is no water in the boiler, the activation of the boiler’s resistance may cause damage. This function deactivates the resistance when the level probe is not covered by water.

The user can customize the time of the deactivation of the resistance.