for the technician
Combustion check
The boiler has a “CHIMNEYSWEEPER” function which draws the ignition of the burner to the
highest power (not modulated) without working on the room thermostat or on the flow of hot water.
— Arrange the instruments for the combustion check;
— bring and keep the selector Summer/Winter in the “Chimneysweeper”
Position for at least
3 seconds, then let the selector return in the Summer Position. The green lamp flashes
rapidly and the burner ignites at the maximum output, for a period sufficient to make the cheking
and the measurements. The produced heat is carried off by the heating system;
— to turn off the burner, turn the selector Summer/Winter in the central (0) position. The green
lamp flashes slowly.
REMARK: the burner will turn off automatically at the achievement of the system highest tempera-
ture and, however, after 15 minutes.
Hydraulic section
DOMESTIC HOT WATER FLOW ADJUSTMENT
The boiler is checked and adjusted prior to leaving the fac-
tory. However, after installation, it is advisable to check
the settings. To carry out adjustments, proceed as follows:
— Open a domestic hot water tap to maximum flow posi-
tion.
— Hold a water flow gauge under the tap.
— Adjust water flow to the required flow rate, acting on
the adjustment screw of the priority pressure sensor
(see figure).
PUMP’S SPEED
The pump has a selector which allows to reduce the speed, so as to reduce the noise produced by
the too rapid circulation of the liquids in too small heating systems.
III = Maximum Speed (Firm Set up)
II = Medium Speed
I = Minimum Speed
772R01
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