The aerators in this system will run continuously. There will be a 360 degree top mounted red light for alarm conditions and a piezoelectric buzzer in the door of the enclosure.
The 20 Amp pump circuit breaker will supply a 120VAC single phase ½ HP or smaller pump. The pump operation is controlled by a Grasslin Pin Timer. With this timer, the pump can be operated on 15-minute intervals at any time of the day. This type of system is used mainly for night time aerobic spray where you only want the pump to operate during certain hours. There are two 7 Amp aerator circuit breakers will power two shaft aerators continuously. The 10 Amp alarm circuit breaker will power the alarm circuit. The High Water alarm is designed to be used with a normally open float switch. When the high water float switch raises the red alarm light and buzzer will activate. This control uses two current switches to monitor aerator operation. The shaft aerators do not have air lines and rely on a spinning tee on the bottom of the motor shaft to draw air through the hollow motor shaft and out the tee. If either motor stops running from a disconnected from the power source, shuts off due to thermal overload or the circuit breaker trips, the current switch will activate the alarm light and buzzer. This type of alarm is beneficial over just relying on the circuit breaker to trip which is found in most alarm systems on the market today. There are alarm test and buzzer silence switches mounted in the door of the enclosure.
The enclosure has a NEMA rating of 4X which provides protection from falling dirt, falling liquids, hose-directed water and corrosive agents.
The 10”x8”x4” enclosure is made of Polycarbonate and has a hinged lockable door with latches and included screws to secure the door if required. All electrical components are mounted inside the enclosure on an aluminium back plate.