ACV Prestige 24 Excellence, Installation, Operating And Servicing Instruction, Page: 14 / 48

664Y4000.A
prest ge
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connection to the chimney
- The chimney connections must comply with the applicable standards (in
Belgium: NBN D51-003), the local energy supplier’s instructions, the fire
regulation and neighbourhood good practices.
- The Prestige has an inbuilt gas/air ratio regulator, which makes it largely
independent of the pressure drop in the air intake and flue gas extraction
system. However, the maximum pressure drop for this system may not
be exceeded, or the pressure will diminish. Nevertheless, the gas/air ratio
regulator continuously guarantees optimum combustion with very low
emission levels.
- The horizontal flue gas pipes must always be installed with a min. slope of 5
mm per meter, upwards from the boiler side.
- There must be no obstruction or openings for any other appliances within
a radius of 0.5 metres around the flue terminal of the Prestige.
- The maximum flue resistance is 130 Pascal. You can use the following
table as the basis for calculating this value (please also refer to the specimen
calculation presented under the table).
- The C33s configuration enables airtight operation in a pre-existing
chimney. The combustion air crosses the space between the tubing and the
pre-existing chimney. Make sure to clean the pre-existing chimney
thoroughly prior to installation, especially if there is soot or tar residue.
Make sure that there is a clearance area for the combustion air at least
equivalent to the area that would have been provided by separate concentric
ducts or air intake ducts.
Table of flue resistance in Pascal
(1Pascal = 0,01 mbar)
Pipe
concentric
Ø 80/125
mm
Air inlet
separate
Ø 80
mm
Air extraction
separate
Ø 80
mm
1 m straight pipe 5.0 1.5 2.0
Pipe with a monitoring
section
2.5 — 1.0
90° pipe bend 6.0 1.9 3.4
45° pipe bend 4.0 1.3 2.3
Vertical pipe 20.0 — —
Horizontal pipe 15.0 — —
This table is based on the equipment offered by ACV and cannot be applied generally.
b23
: Connection to an exhaust duct venting the combustion products
outside of the installation area, with the combustion air being
drawn directly from this area.
b23p
: Connection to an exhaust system of the combustion products
designed to operate with positive pressure.
c13
: Connection by pipes with horizontal terminal units that
simultaneously intake the combustion air and discharge the
combustion products outside through openings that are either
concentric or close enough together to be subjected to similar wind
conditions.
c33
: Connection by pipes with vertical terminal units that simultaneously
intake fresh air and discharge the combustion products outside
through openings that are either concentric or close enough
together to be subjected to similar wind conditions.
c33s
: Connection with an individual system of which the exhaust duct for
the combustion products is installed in an exhaust pipe that is part
of the building. The appliance, the exhaust duct and the terminal
units are certified as an assembly that cannot be dissociated.
c43
: Connection by two ducts to a collective duct system serving more
than one appliance; this system of collective ducts features two
ducts connected to a terminal unit that simultaneously intakes
fresh combustion air and discharges the combustion products
outside through openings that are either concentric or close
enough together to be subjected to similar wind conditions.
c53
: Connection to separate ducts for the supply of combustion air and
for venting the combustion products; these ducts may end in zones
with different pressure levels.
SAMPLE CALCULATION:
The diagram below consists of the following parts: pipe with monitoring
s 2 x 90° pipe bends + 2 metres of horizontal pipe + 2 x 45° pipe bends
+ (2 + 1 + 1) metres of vertical pipe and fall back + discharge.
Therefore, the resistance of this system is as follows:
2.5 + (2 x 6.0) + (2 x 5.0) + (2 x 4.0) + (4 x 5.0) + 20
= 72.5 Pa.
This value is less than the maximum authorised resistance, therefore the
installation is compliant.
INStAllAtIoN