INSTALLATION INSTRUCTIONS
62
Modulation circuit board (see fig. 1-2)
In order to access the computer control board, please proceed
as follows:
DANGER
Remove the voltage from the unit.
• Grab the tabs at the sides of the control panel and
slightly pry them apart from the control box (fig. 1)
loosening them and turn the panel downwards;
• unscrew the four fixing screws and remove the
modulation circuit board
• remove the crankcase pulling it upwards.
• Replace the circuit board and re-assemble the
components following the above procedure in reverse
order;
• Add voltage to the unit,
The pre-set parameters of the printed circuit board
correspond to an instantaneous type water heater fed
by natural gas.
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