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664Y4500 • D
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INstallatIoN
flue connectIon
- The connections must comply with the NBN D51-003 standard taking into
account local energy suppliers’ instructions, fire regulations and regulations
relating to “pollution”.
- Thanks to its built-in gas/air ratio regulator, the HeatMaster® C is, to a large
extent, independent of pressure drops in the air intake and flue-gas exhaust
systems. However, the maximum pressure drop of this system may not be
exceeded; otherwise, the output would diminish. However, the gas/air ratio
regulator always guarantees optimal combustion with very low emissions.
- In order to avoid any spillage of condensate via the terminal, the horizontal
flue gas exhaust ducts must be installed with a sufficient degree of slope
towards the boiler: 3° of slope = 5 mm per metre of duct.
- There must be no obstructions or inlets to other appliances within a radius
of 0.5 meters around the terminal of the HeatMaster® C.
- The maximum pressure drop of the chimney is 130 Pascal for the
HeatMaster® 25 C. You can calculate this value using the following table:
(please see sample calculation).
EXAMPlE OF CAlCulATION:
The diagram below consists of the following parts: pipe with a measuring point
+ 5 metres of vertical pipe + two 45° pipe bends + 1 metre of inclined pipe +
one vertical terminal.
The resistance of this system is as follows:
2.5 + (5 X 5.0) + (2 X 4.0) + 5.0 + 20 = 60.5 PA.
As this value is lower than the maximum authorised resistance, this
installation is therefore compliant.
FluE PRESSuRE DROP CHART IN PASCAl
(1 Pascal = 0.01 mbar)
concentric pipe
separate air inlet
separate flue gas exhaust
HM 25 C
Ø 80/125 mm
HM 25 C
Ø 80 mm
HM 25 C
Ø 80 mm
Straight pipe 1 m
5.0
1.5
2.0
Pipe with measuring point
2.5
—
1.0
90° bend
6.0
1.9
3.4
45° bend
4.0
1.3
2.3
Vertical terminal
20.0
—
—
Horizontal terminal
15.0
—
—
This table is based on ACV equipment and cannot be applied generally.
4000 mm
1000 mm
1000 mm
10800220
HeatMaster® 25 C vent kit
assembly
