Beretta POWER PLUS Installation Instruction page 61

- Locate the gas jet and seal. If the system is methane
fuelled, there is no diaphragm.
- Replace the calibrated diaphragm fitted on the gas
valve with the diaphragm (4) supplied inside the kit,
mark "6.5".
Only if the boiler is supplied by a mixture of gases that
causes ignition problems, use the other diaphragm (5)
marked "6.75".
- Reassemble the gas valve
- Apply the sticker (6) for G30-G31, supplied inside the
kit, on the inside of the panelling, and remove the stic-
ker for G20
After having installed the kit make sure that:
- All the joints made are tight
- All the calibration operations described in the
"Adjustments" paragraph below have been completed.
61