I.2 Text From Bs 5440-1 On Fan-Supported Flue Gas Guiding - Vaillant ecoTEC plus 806 VU GB 806/5-5 Installation And Maintenance Instructions Manual

Appendix
I.2 Text from BS 5440-1 on fan-supported flue gas guiding
BS 5440–1: It is recommended that the fanned flue gas system terminal is positioned as follows:
–
At least 2 m from an opening in the building directly opposite, and
–
So that the combustion products are not discharged directly across a property boundary.
–
Dimensions D, E, F and G: These clearances may be reduced to 25 mm without affecting the performance of the boiler.
In order to ensure that the condensate vapour plume does not damage adjacent surfaces, the terminal should be exten-
ded as shown.
–
Dimension H: This clearance may be reduced to 25 mm without adversely affecting the performance of the boiler. How-
ever, in order to ensure that the condensate vapour plume does not damage adjacent surfaces, a clearance of 300 mm is
preferred. For IE, recommendations are given in the current issue of the IS 813.
I.3 Opening of the flue pipe below eaves and balconies
The flue pipe must
Adequately secured
protrude beyond any overhang
air/flue gas pipe
J Treating the heating water
3,6
3,3
3
80 kW
2,7
100/120 kW
2,4
2,1
1,8
1,5
1,2
0,9
B
0,6
0,3
0,0
0 500
x System volume [l]
y Water hardness [mol/m³]
52
Balcony/eaves
Gutter
A
80 kW: A
100/120 kW: B
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
x [l]
A Water treatment required
B Water treatment not required
Installation and maintenance instructions ecoTEC plus 0020134823_04