Girard Products GSWH-2 Technical Manual page 6

Input 12VDC Power:
Red wire positive and black wire ground to back of the water heater
Confirm that you have a good power source with filtered voltage. Older linear type converters can cause issues with the
operation of this more advanced board.
12VDC Ground Black wire run direct to board through power connector
Power Switch and Fuse:
Power between the red and the black wires eliminates the fuse, switch and
incoming power supply. Ensure the ground is good.
Removal and replacement of fuse and switch:
Static Operation – No Water Flow
12VDC Red wire positive to the power switch.
12VDC Red wire from the switch to the fuse.
12VDC Red wire from the fuse to the power connector.
12VDC Red Wire from the power connector to the board.
Black Negative
Red Positive
Push down on top tab and
up on the bottom tab and
pull forward
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