23
SYS 10-23
Opening the casing
To open the boiler casing:
1
Using a screwdriver, completely remove the 2
screws,
“A”
2
Open the control panel
“B”
by pulling down
3
Unscrew the 2 screws
“C”
4
Remove the casing
“D”
.
C
D
B
fi g. 15
A
D
Air
Flue
gases
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 operations 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)
Take a reading with your flue gas analyser.
8)
CO/CO2 ratio should be 0.004 or below. If above
a full service is required to find the cause and
then RE-TEST.
9)
Following a full service the permissible reading is
now 0.008 or below.
Testing before thermal equilibrium has been reached will give incorrect readings.
fi g. 16
Содержание SYS 10-23
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