Solar heating system with electronic control - employs temp. sensors at outputs of hot water tank and solar cell

摘要

The electronic control panel for a solar heating system carries a time switch (RP), an electronic thermostat (TE) and two switching relays (R1, R2). These operate in conjunction with two temp. sensors or measuring devices (S1, S2). The first sensor (S1 is at the output of the solar cell (T) and the second sensor (S2) is at the output of the hot water tank (Z). The timing device determines the operating wire of an accelerating pump, to obtain a required operating temp. This is achieved by a rise and fall in temp. in different parts of the circuit occurring in cycles, influenced by an electronic thermostat for the hot water tank.