What is the OP connection on the control panel used for?

The OP connection can be integrated with an electric utility OFF PEAK or Time of Use (TOU) program. This enables the utility to remove the boiler’s kW load off of their peak or enable the operation of the heating systems during specific times of the day. In turn the customer receives discounted electricity. The OP circuit could also be utilized to shut the boiler off using any dry contact integrated in other applications.