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DUPLEX AIR BUBBLER CONTROL PANEL - (Con't) <br /> Two 15 amp, single pole circuit breakers shall be provided for the protect- <br /> ion of the air compressor, and the control circuit. <br /> MOTOR STARTERS <br /> NEMA magnetic motor starters shall be mounted in the electrical section of <br /> the control panel. One for each pump motor. Each starter shall have 3 leg <br /> overload protection, with external resets. <br /> A Hand-Off-Automatic selector switch for each pump shall be mounted in the <br /> access door, and shall be externally operable. <br /> ENCLOSURE <br /> The enclosure shall be of gasketed NEMA 1 double section construction, fabri- <br /> cated of code gauge sheet steel. The lift section shall contain all electrical <br /> components. This section shall be interlocked with the two power circuit <br /> breakers. The right section shall contain all pneumatic components. This <br /> section access door shall not be interlocked, to provide minor adjustments of <br /> the pressure switches while the pumps are in operation. THERE SHALL BE NO <br /> EXPOSED ELECTRICAL CONNECTIONS IN THIS SECTION . <br /> AUTOMATIC ALTERNATOR <br /> The model A31 automatic alternator is incorporated in the model V-1215-3 <br /> air bubbler control panel as part of the standard package. <br /> PUMP CONTROLS <br /> To control the operation of the pumps with variation of levels in the wet well, <br /> an air bubbler system shall be provided, complete with air compressor, air <br /> reservoir, pressure regulator, flow meter, differential mercury pressure <br /> switches, and depth gauge calibrated in inches of water, to cover a range of <br /> 0-150 inches. An automatic alternator shall be provided to change the sequence <br /> of operation of the pumps at the end of each pump cycle. <br /> PLANlit <br /> �Y <br /> Ll; <br /> C.Fd" ' 1 <br /> h � <br /> {Er ks J yI <br /> T3 ��tG✓ F , � if�.Ivry <br /> C r <br /> '� ......_��. _ ....._.............................. <br /> _.._.........................:. <br /> ❑ . ........... <br /> -31- <br />