iSolar Plus Solar Differential Temperature Controllers from Bjorn Johnson Mechanical

Bjorn Johnson Mechanical offers the 257 iSolar Plus solar differential temperature controller, manufactured by Caleffi. The differential controller is compatible with solar heating systems that have two relay outputs. The differential controller includes a power cord and four input sensors. The solar thermal temperature controller features a graphic display that helps to monitor the system. The differential temperature controller is featured with two electronic relays to control the pump speed.

The 257 iSolar Plus solar differential temperature controller is equipped with a real time clock to provide timer function. The maximum storage tank temperature and minimum collector temperature are adjustable in the controller. The controller also offers nine selectable system arrangements and two tank priority logic. The system can be monitored and controlled by the service center software that is provided as optional. The solar differential controller, supplied by Bjorn Johnson Mechanical, includes emergency shutdown feature.

The 257 iSolar Plus solar differential temperature controller requires a power supply of 115 volts. The temperature controller works with a power consumption of 2 amperes, and with the relay contact rating of 2 amperes. The solar thermal system controller incorporates V bus connection for data logging interface that is available on demand. Other features of the solar differential temperature controller include freeze protection, cooling function, and energy use meter. The weight of the temperature controller is 2 pounds.

Source: http://bjornjohnsonhvacservice.com