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Sensors that are not used for control can be used for temperature reading in a separate menu.
When the boiler heats the main tank so that the temperature is higher than the set temperature, the charging pump starts to pump hot water into the slave tank. The sensor in the bottom of the slave tank stops the process when the slave tank is fully charged.
When the main tank is cold, the discharging pump starts and pumps over hot water from the top of the slave tank to the main tank. This takes place at a low flow thanks to that the Laddomat 5000 valve is equipped with a strong choke. Efficient separation of the heat is thereby achieved in both tanks. Discharging can only be started if the slave tank is warmer than the main tank.
Discharging can be interrupted at the desired temperature at the tank top sensor and, the additional heating, if any, may then be started in addition.
A fourth sensor can be put in the main tank to force the charging pump, in this way optimise use of any solar heating. By heating in two steps the solar coil can heat the primary tank first and then heat up the entire system. It is first then that the entire volume's temperature is increased. It is also possible to use this function to prevent the system from overheating, for example when burning wood.
A double non-return valve is fitted in order to prevent involuntary circulation between the tanks. This has an integrated choke of the flow during discharging that provides optimum separation. As the non-return valve is spring-loaded in both directions it is completely mode-independent.