| Universal
Differential Controller USDT
2004B is an advanced temperature differential controller. It is a
microprocessor based temperature controller that regulates solar
water heating systems and any other heating systems such as:
storage tank charging and boiler activation systems. The USDT 2004B
monitors and displays supply and return temperatures. When the supply temperature exceeds
the return temperature by a programmable temperature difference (∆T),
an internal relay can power a ¼ HP pump or an auxiliary relay.
To avoid overheating the controlled system, the pump stops when
the supply temperature reaches a programmable maximum temperature
(TMAX).
The system offers an adjustable temperature hysteresis to avoid pump cycling.
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USDT
2004B controller has following functions:
> 2 inputs for temperature
sensors
> Adjustable hysteresises on all inputs
> Adjustable
overheating protection
> Adjustable (4.1 oF to 99 oF)
temperature difference ∆T
> Manual pump operation for system testing
> Exchangeable 3.5 A system protection fuse
> System diagnostic and status displays
> Collector sensor surge protection
> Digital display of all parameters
The standard unit
includes two thermistor sensors. The system
diagnostics are powerful and acute; they display potential system
problems such as sensor or pump failures.
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