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De Dietrich MS 24 BIC Manual

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71.06953.01 - EN
INSTALLATION INSTRUCTIONS
To measure combustion efciency and the toxicity of the products of combustion, the boiler is tted with two dedicated
test points.
One connection point is connected to the exhaust duct and is used to measure combustion efciency and the toxicity of
the products of combustion.
The other is connected to the air intake circuit and is used to check for the presence of any products of combustion
circu¬lating in installations with co-axial ues.
The following parameters can be measured using the test point connected to the exhaust duct:
• temperature of the products of combustion;
• concentration of oxygen (O
2
) or, alternatively, carbon dioxide (CO
2
);
• concentration of carbon monoxide (CO).
The temperature of the comburent air must be measured on the test point located on the air intake ue by inserting the
measurement sensor by about 3 cm.
N.B.: to regulate the rated power, see chapter 19 (B1)
For natural draught boiler models, a hole must be made in the exhaust ue at a distance from the boiler equal to twice
the internal diameter of the ue.
The following parameters can be measured through this hole:
• temperature of the products of combustion;
• concentration of oxygen (O
2
) or, alternatively, carbon dioxide (CO
2
);
• concentration of carbon monoxide (CO).
The temperature of the combustion air must be measured close to the point where the air enters the boiler. The hole,
which must be made by the person in charge of the system during commissioning, must be sealed so as to ensure that
the exhaust duct is airtight during normal operation
.
24. CHECKING COMBUSTION PARAMETERS
25. PUMP CAPACITY/ HEAD
A high static head pump (GRUN-
DFOS UPSO 15-50), suitable for
installation on any type of single- or
double-pipe heating system, is used.
The automatic air valve incorporated
in the pump allows quick venting of
the heating system.
Graph 1
FLOW l/h
HEAD mH
2
O
1103_0901
23. POSITIONING THE IGNITION AND FLAME-SENSING ELECTRODE
Figure 13
9912070100
… 78 …


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