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[OldWEB]

When the wall switch is turned on to either gas, electric or both the power moves from the wall switch to the DSI board through the Molex connector.

1. Gas - When the wall switch (flame) is turned on for gas operation, the orange wire (OR 1) is energized with DC voltage.
2. Electric - When the switch (lightning bolt) is turned on for electric operation the white wire (WHT 2) is energized with DC voltage.
The power moves from the internal board circuits to the brown wire at the (BRN 3) connection.
From this point the power for gas, electric or both moves through the thermostat, thermal cut off and enters the board again at the lower (BRN 1) connection. This completes the circuit to the lower connection on the board.

When the switch for GAS ignition is turned on -
1. Power is sent to the coil on the board. The coil creates a spark for ignition.
2. Power is sent to (RED 4) connection. From this point, power flows through red wire, through the ECO and to the gas valve.
When the switch for ELECTRIC is turned on -
Power is sent from the board to the yellow wire (YLW 2). The yellow wire carries DC voltage to the relay in the back of the water heater. The 12 volt energizes the relay which sends the 110 V to the element