for the technician
Slow opening regulation
To adjust the slow opening, proceed as follows:
— switch off the boiler;
— release the screws [1] (see figure) and remove the back closing of the control panel;
REMARK: you will have 8 seconds for the regulation of the slow opening pressure, and after these
8 seconds the pressure of the burner increases to the highest value. To increase this period of
time to 30 seconds, turn the trimmer P1 MAX.R. completely in anticlockwise sense (it will be
necessary to regulate consequently the Max Heating Power).
— turn on the boiler and open a cold water tap, the burner will turn on allowing to check the
pressure of slow opening. In case the values are different from:
Nat. gas: mod. 23 E: 3,5 mbar (36 mm w.g.) – mod. 28 E: 5 mbar (51 mm w.g.)
mod. 24 SE: 7 mbar (71 mm w.g.) – mod. 30 SE: 5 mbar (51 mm w.g.)
L.P.G.: mod. 23 E: 8 mbar (82 mm w.g.) – mod. 28 E: 8 mbar (82 mm w.g.)
mod. 24 SE: 14 mbar (143 mm w.g.) – mod. 30 SE: 14 mbar (143 mm w.g.)
turn the trimmer P4 RLA (in clockwise sense to increase the pressure and in anticlockwise
sense to decrease the pressure) till the achievement of the correct value.
Regulation of MAX heating power
The maximum heating output must be set in accordance with the system requirements (stated in
the project). The gas pressure values related to the different outputs are indicated in the table
“BURNER PRESSURES”. To adjust the burner pressure proceed as follows referring to the figure:
— Remove the back closing of the control panel releasing the screws [1] (see figure).
— Set Summer/Winter selector to Winter
position and adjust the eventual room thermostat to
a temperature value higher than the present one.
— When the burner is turned on (wait the end of the climbing ramp which lasts about 1 minute)
check the value of the maximum gas pressure through the pressure gauge.
— Adjust pressure turning round the potentiometer P1 MAX. R. until reaching the required value.
— Close the control panel.
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852R00
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