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NLTECHNISCHE KENMERKEN
664Y5500 • D
Concentrische schouwbuis
Ø 80 / 125 mm Ø 100 / 150 mm
HM 25 TC HM 35 TC HM 45 TC HM 70 TC HM 85 TC HM 120 TC
Pa
equival. lengte in m
rechte leidingen
Pa
equival. lengte in m
rechte leidingen
Pa
equival. lengte in m
rechte leidingen
Pa
equival. lengte in m
rechte leidingen
Pa
equival. lengte in m
rechte leidingen
Pa
equival. lengte in m
rechte leidingen
Rechte leiding 1m 2 1,0 4 1,0 6 1,0 6 1,0 9 1,0 17 1,0
Leiding met meetopening 2 1,0 3 0,8 4 0,7 3 0,5 4 0,4 7 0,4
Bocht 90° 3 1,5 6 1,5 10 1,7 14 2,3 21 2,3 38 2,2
Bocht 45° 2 1,0 3 0,8 5 0,8 8 1,3 12 1,3 22 1,3
Verticale dakdoorvoer 18 9,0 35 8,8 58 9,7 22 3,7 32 3,6 59 3,5
Horizontale muurdoorvoer 18 9,0 34 8,5 56 9,3 17 2,8 24 2,7 44 2,6
De guur links geeft een aansluitingsvoorbeeld weer,
voorgesteld door een installateur.
De installatie bestaat uit:
1 leiding met meetopening + 2 bochten 90° + 6
meters rechte leidingen + 2 bochten 45° + 1 verticale
dakdoorvoer.
De installateur kan nagaan of de aansluiting conform
is met de aanbevolen installatie door middel van één
van beide methodes hieronder.
Methode 1 :
a) Bereken het drukverlies (Pa) van het volledige
schouwkanaal.
3 + (2 x 6) + (6 x 4) + (2 x 3) + 35 = 80
b) Vergelijk dit resultaat met de aanbevolen waarde
(130 Pa).
Het drukverlies van het schouwkanaal ligt lager
dan de maximale toegestane weerstand.
Methode 2 :
a) Bereken de equivalente lengte in meters rechte
leidingen (L) voor het volledige schouwkanaal.
0,8 + (2 x 1,5) + (6 x 1,0) + (2 x 0,8) + 8,8 = 20,2
b) Vergelijk het resultaat met de aanbevolen
waarde (65 m van equivalente lengte).
De lengte van het schouwkanaal ligt lager dan de
maximale toegestane waarde.
Berekeningsvoorbeeld in geval van een concentrische buis (HeatMaster 35 TC):
1000 mm
1000 mm
2000 mm
2000 mm
L
L = equivalente lengte of
schouwkanaal in meters rechte
leidingen (1 m rechte leiding) .
L2
L1
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