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The electronic flue gas temperature limiter switches the gas fired condensing boiler off
when the flue gas temperature exceeds 110 °C.
The boiler restarts when the reset button is pressed.
The rated boiler output in heating mode must be reduced to below 11 kW, if the gas
fired condensing boiler is installed with a balanced flue routed over an external wall (for
appropriate measures, see chapter „matching the maximum output“ on page 24).
Flue gas temperature limiter
The clear cross-section of flues must be able to be inspected. Therefore, install an
inspection and/or test aperture inside the boiler room; agree suitable arrangements
with your local heating engineer.
Flue connections are created using couplings and gaskets. Always arrange couplings
against the condensate flow direction.
Install the balanced flue with a slope of at
least 3° towards the gas fired condensing boiler. Install spacer clamps to secure
the location (see installation example).
Connection to the balanced flue
The calculated length of the balanced flue system or the flue is derived from the straight
pipe length and the length of the pipe bends.
Example for a system comprising 60/100
1)
Length of straight balanced flue 1.5 m
L = straight bend length
1 x 87° bend = 1.5 m
L = 1.5 m + 1 x 1.5 m + 2 x 1.3 m
2 x 45° bends = 2 x 1.3 m
L = 5.6 m
Calculating the
balanced flue length
Note:
To avoid the fresh air supply and flue gas exhaustion influencing each other
above the roof, we recommend you maintain a minimum clearance of 2.5 m
between the inlet and outlet.
1)
Length equivalence of the system:
Design information
60/100
80/125
87°-bend
1,5 m
3 m
45°-bend
1,3 m
1,5 m
