Found this in a box today. It was no longer in use, but how was it supposed to be wired and what did it do? It says hydromaaster products and Systematic on the label Top has a red light under which says PWR and two dials. Middle dial has VLT under it and right dial has WTR What has me wondering is the SIX wires. one white, one red, one blue, one green and two black. Who has seen / used one of these before?