Girard Products GSWH-1 Service Manual page 23

1 K Modulator Control Board:
It is impossible to identify the difference between the gas modulator control board for a 1K and
a 2.2 K system by the size and shape of the box. The color of the wires going to the board will
confirm the type of board. Orange and red wires to the modulator control board identify indicates
a 1 K gas modulator board.
2.2 K Modulator Control Board:
IRed and white wires to the board identify that it is a 2.2 K gas modulator board.
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