16
Externa 30 O
Cod. 3540T540 - 04/2009 (Rev. 00)
Cleaning the boiler and the burner
The body and the burner must not be cleaned using chemical products or steel brushes. Special care
must be taken to ensure all the systems relating to the sealed compartment are tight (gaskets, cable
glands, etc..), to
avoid air leaks which, causing a drop in the pressure inside in chamber, may activate the differential
pressure switch and thus shut-down the boiler. Special attention must also be paid, after all the ope-
rations have been completed, to checking and performing all the ignition phases and operation of the
thermostats, gas valve and circulation pump.
After these checks, ensure that there are no
gas leaks.
Analysis of combustion
Two test points are installed inside the boiler, one for
the flue gases and the other for the intake air.
To make the measurements, proceed as follows:
1)
Remove the boiler casing
2)
Open the air and flue gas sample points in the sealed
compartment;
3)
Insert the probes as far as possible;
4)
Open a hot water tap;
5)
Adjust the domestic hot water temperature to the
maximum setting.
6)
Wait 10-15 minutes to allow the boiler to reach stable
operating conditions*
7)
Make the measurements.
Analysis performed when the boiler is not in
stable operating conditions may lead to errors
in measurement.
Opening the casing
Follow the indications shown in the figure to open the casing.
4
3
1
2
Air
Flue gases
