volts dc from the power supply and stops the motor this deactivates the water heater gas valve a typical wiring setup is discussed herein presuming the wall plug is plugged in and the timer has been set and activated on some water heaters the temperature control dial is rotated in the counterclockwise direction to attain a higher temperature setting the wiring schematic shown in fig3 would be utilized with an actuator when the counterclockwise temperature dial is present the wiring schematic shown in fig4 is appropriate when the temperature control dial on the gas valve is rotated in the clockwise direction to attain a higher temperature setting for the water heater utilizing the schematic in fig4 the path of current can be traced from the negative terminal u2212 on power supply ps to the positive terminal on the ps to explain the operation of the valve timer this will explain the operation of the valve electronics control that turns the gas valve off and on using the fig4 clockwise rotation on schematic diagram start at the negative u2212 terminal at the internal power supply p s blk wire the blk wire is connected to two devices a relay at pin 6 and the off limit switch ds 2 at the common c terminal off limit directional switch ds 2 corresponds to part 26 in fig1 the relay at pin 6 is a u201c normally open u201d contact there will be no current passing through the relay at pin 6 because the contact is open the other connection at the common c terminal of the off limit switch ds 2 is passing current to its u201c normally closed u201d n c contact then to pin 4 of the relay brn.