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<p>Dear trnsys_users,</p>
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<p>I need to model a control system in TRNSYS to turn on the auxiliary heater (which is connected to the thermal storage tank) according to the following control strategy:</p>
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<p>If the return temperature from the radator has stayed lower than a specified constant value for more than 1 hour since the last stop of the circulating pump of the space heating circuit, the control unit sends a control signal with the value of 1 to the
auxiliary heater. </p>
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<p>I have attached the TRNSYS file of my model as well.</p>
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<p>I appreciate your help in advance.</p>
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<p>Best Regards,</p>
<p>Hossein.</p>
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