21
20190369
GB
Installation
To calculate the approximate output at which the burner
operates:
–
subtract the combustion chamber pressure from the gas
pressure measured at test point 1)(Fig. 23).
–
Find, in the Tab. F relating to the burner concerned, column
1, the pressure value closest to the result you want.
–
Read the corresponding output on the left.
Example with natural gas G 20 for RS 34 MZ:
Maximum output operation
Gas pressure at test point 1)(Fig. 23)
=
9.3 mbar
Pressure in combustion chamber
=
2.0 mbar
9.3 - 2.0
=
7.3 mbar
A pressure of 7.3 mbar, column 1, corresponds in the table to an
output of 260 kW.
This value serves as a rough guide; the effective output must be
measured at the gas meter.
To calculate the required gas pressure at test point 1)(Fig. 23),
set the maximum modulating output required from the burner
operation:
–
find the nearest output value in Tab. F for the burner in
question.
–
Read, on the right (column 1), the pressure at the test point
1)(Fig. 23).
–
Add this value to the estimated pressure in combustion
chamber.
Example with natural gas G 20 for RS 34 MZ:
Operating at the desired maximum output: 260 kW
Gas pressure at an output of 260 kW
=
7.3 mbar
Pressure in combustion chamber
=
2.0 mbar
7.3 + 2.0
=
9.3 mbar
pressure required at test point 1)(Fig. 23).
2
1
Fig. 23
S8738