De Dietrich MS 24 BIC FF Manual Para El Usuario página 70

... SEPARATE FLUE AND AIR DUCTS
This type of installation makes it possible to discharge exhaust fumes both outside the building and into single flue ducts.
Comburent air can be drawn in at a different location from that of the flue terminal. The splitting kit comprises a flue duct
adaptor (100/80) and an air duct adaptor. For the air duct adaptor, fit the screws and seals previously removed from the cap.
Boiler model
24 BIC FF
The first 90° curve is not considered when calculating the maximum available length.
The 90° curve allows the boiler to be connected to a flue-air duct in any direction as it can be rotated by 360°. It can also
be used as a supplementary curve combined with a duct or a 45° curve.
• A 90° curve reduces total duct length by 0.5 metres.
• A 45° curve reduces total duct length by 0.25 metres.
Adjusting the air regulator for separate flues
This regulator must be adjusted to optimise combustion efficiency and parameters.
After turning the air intake connecter, which can be mounted both to the right and the left of the exhaust flue duct, suitably
adjust the excess air according to the total length of the combustion exhaust and inlet flue ducts.
Turn this regulator anticlockwise to decrease the excess of comburent air and vice-versa to increase it.
To fine tune, use a combustion product analyser to measure the amount of CO
and, if a lower value is measured, gradually adjust the air regulator until the amount of CO
is measured.
To mount this device correctly, consult the relative instructions.
Figure 8
INSTALLATION INSTRUCTIONS
(L1+L2)
of air regulator
0 ÷ 20
20 ÷ 30
connector
aperture
index
70
Position
G20
1
6,1
2
in the fumes at maximum heat capacity,
2
indicated in the following table
2
CO %
2
G31
8,7
71.06199.02 - EN