USDT-2004A Advanced Solar Differential Controller

digital display, calculates energy collection/consumption, adjustable trigger from 1°F to 50°F, 115vac

The USDT-2004A is an advanced temperature differential controller that builds on the capabilities of the USDT-2004B. This advanced controller calculates energy collection (or consumption) by multiplying the flow volume by the difference in water temperature between the supply and return lines and displays the results on an its LCD window. It ensures the highest level of accuracy by using adjustable (on unit calibration) temperature sensors and microprocessor calculations.

When the supply temperature exceeds the return temperature by a programmable temperature difference (?T), an internal relay powers a 0.25 HP pump or an auxiliary relay.

To avoid overheating the controlled system, the controller stops the pump when the supply temperature reaches a programmable maximum temperature (T_MAX). The controller offers an adjustable delay to temperature measurements to avoid pump cycling on and off too quickly.

Features

• Precise digital differential controller for efficient heat collection
• Digital display of flow rate (GPM)
• Digital display of collector (supply, T_c) temperature
• Digital display of collector (return, T_t) temperature
• Adjustable Delta T (?T) differential
• Manual override of outputs for system testing
• Over-heating pump stop for system boiling protection
• Digital display of tank (return system) temperature
• User friendly diagnostics system
• Collector status screen
• Sensor cables can be extended up to 500 feet using standard two wire cables

Good replacement for the discontinued Goldline TDGL/GL30 LED read out