racca

hi sorry newby trying to follow the above instructions but need some clarification. Under wiring above sez "wire the ground to the ground pin, wire the postive input to pin 1" Can't find any documentation for LSU4.9 that clearly points out (to me anyway) positive and ground wires. Would generally expect the red to be positive and the black to be ground but online research has confused me saying that the common/yellow wire is the positive and the pump/red wire is the ground. Is that correct? With only 2 wires connected does it perform its heating function?