Baxi Mainfour 240 F Manual Para El Usuario página 11

... 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.
Position
(L1+L2)
of air regulator
0 ÷ 4
4 ÷ 18
18 ÷ 30
The first 90° bend is not included when calculating the maximum available length
The 90° bend 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 bend combined with a duct or a 45° bend.
• A 90° bend reduces total duct length by 0.5 metres.
• A 45° bend reduces total duct length by 0.25 metres.
Adjusting the air regulator for sepa-
rate 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 counter-clockwise
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
fumes at maximum heat capacity, and,
if a lower value is measured, gradually
adjust the air regulator until the amount
of CO indicated in the following table
2
is measured. To mount this device cor-
rectly, consult the relative instructions.
INSTRUCTIONS FOR FITTERS
Flue
RESTRICTOR
A
1
2 NO
3
Flue duct adaptor
Connector
in the
2
Figure 8
CO
G20
6,4
Air intake restrictor
11
%
2
G31
7,4
926.527.2 - EN