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Fig. 97
Fig. 96
IMPORTANT :Please,
lubricate the internal
part of the seals before
being fitted.
44
Exhaust/suction system with concentric pipes for fl at or
sloping roofs. Extensions with two separate pipes
( Fig.95 ).
Maximum distance : T= L = 21+21 = 42 metre+Terminal
Minimum distance : L = 0.5+0.5= Terminal
Exhaust terminal must not be cut
NOTE:
- If bends are used in the exhaust fl ue then horizontal
- sections must be avoided and there must be a 2° slope
- towards the boiler 35 mm fall per metre.
IMPORTANT:
- See Fig. 6 and 42 for terminal clearances.
- The pressure loss see table 6.
Exhaust/suction system with two separate rated 80 dia.
Pipes - exhaust on fl at or sloping roof,
suction from vertical wall ( Fig.96 ).
Maximum distance D = L + L1 = 40.5 metre + Terminal
Minimum total length = 2 metre
NOTE: Exhaust fl ue must slope 2° down towards the
boiler 35 mm fall per metre.
Exhaust/suction system with two separate
pipes through a single vertical wall ( Fig.97 ).
Maximum distance : D = L + L1 = 37 metre
Minimum distance : D = L + L1 = 1 metre
Min distance between pipe 50 mm.
IMPORTANT NOTICE:
- inlet and exhaust terminals must never
be installed on opposite walls of the building (PrEN 483).
-
If the fl ue terminates less than 2 m above a balcony, above
the ground, or above a fl at roof to which people have access,
then a suitable terminal guard must be fi tted.
- Fit only recommended fl ue terminal guard by
securing concentrically around terminal with screws.
Available on request from:
RAVENHEAT MANUFACTURING LTD
Chartist Way,Morley, Leeds, West Yorkshire
ENGLAND LS27 9ET - U.K.
Tel. 0044(0) 113 252 7007
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