Abstract: A system for monitoring the amount of refrigerant supplied from a refrigerant tank to a plurality of refrigerant systems comprising a tank valve for connection to a refrigerant tank at a predetermined location. A rack of refrigerant rack lines is routed from the location to the refrigerant systems for connecting the tank valve and refrigerant to the refrigerant systems. Rack valves are disposed in the refrigerant rack lines for controlling the flow of refrigerant through the rack lines to a selected refrigerant system. A sensor for determining the amount of refrigerant supplied from the refrigerant tank to a refrigerant system and recording the supplied amount of refrigerant. The system controller controls the rack valves and tank valve to selectively connect the supply of refrigerant in the refrigerating tank with a selected refrigerant system so that the amount of refrigerant delivered to the refrigerant system is recorded by the system controller.

Abstract: A system for monitoring the amount of refrigerant supplied from a refrigerant tank to a plurality of refrigerant systems comprising a tank valve for connection to a refrigerant tank at a predetermined location. A rack of refrigerant rack lines is routed from the location to the refrigerant systems for connecting the tank valve and refrigerant to the refrigerant systems. Rack valves are disposed in the refrigerant rack lines for controlling the flow of refrigerant through the rack lines to a selected refrigerant system. A sensor for determining the amount of refrigerant supplied from the refrigerant tank to a refrigerant system and recording the supplied amount of refrigerant. The system controller controls the rack valves and tank valve to selectively connect the supply of refrigerant in the refrigerating tank with a selected refrigerant system so that the amount of refrigerant delivered to the refrigerant system is recorded by the system controller.

Abstract: A power control system is disclosed for controlling the power supplied to a lighting system and limiting power during time of peak demands and the like wherein the lighting system includes a power source and a lighting load connected to the power source. The control system comprises a main transformer having a first winding and a second winding, the first winding being connected between the power source and the lighting load. An autotransformer connected to the power source having a plurality of electrical transformer taps with prescribed voltage values. A plurality of solid-state tap switches is connected to the transformer taps and to the second winding of the main transformer to apply the prescribed voltage values across the second winding. A system controller has an input for receiving a voltage change signal representing a selected load voltage to be applied to the lighting load.