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Locate the sealing washer fixing the twin flue
header as illustrated making sure that the ou-
tlet spigot Make sure that the screws are satis-
factorily located through the gasket seal.
Locate the 2 x 80 mm 'O' rings in the twin flue
header.
Figures show the versatility of this flueing system.
Measurements and bends must be calculated
correctly so as not to oversize maximum flue len-
gths.
All located 'O' rings must be lubricated with a
silicone grease to ensure easy, snug fit.
NOTE: Exhaust flue must slope 2° down towards
the boiler 35 mm fall per metre.
Spacing Clips
Spacing Clips are available on request should
they be required.
NOTE: for eccentric vertical flue a 125 mm (5 in)
diameter flashing plate will be required.
48
E = EXHAUST
I = INLET
T= TERMINAL
Exhaust/suction system with concentric pipes for flat or
sloping roofs. Extensions with two separate pipes.
Maximum distance = I + E + T = 2 Metre + 2 Metre + 1
Metre = 12 Metre maximum (pipe + terminal).
Minimum distance D = T = 2 metre.
Exhaust terminal must not be cut
NOTE- The pressure loss for each elbow fitted is:
900 slow bend less 3 metre of pipe for each one fitted.
135° bend less 1.5 metre of pipe for each one fitted.
NOTE:
If bends are used in the exhaust flue then horizontal
sections must be avoided and there must be a 2° slope
towards the boiler 35 mm fall per metre.
IMPORTANT: See Fig. 42 for terminal clearances.
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