90” M/F bend consisting of:
90” elbow with ‘0’ ring side F
80 mm dia ‘0’ ring
135” M/F bend consisting of:
135” elbow with ‘0’ ring side F
80 mm dia ‘0’ ring
Vertical eccentric flue exhaust duct
Figures 2.8, 3.8 and 4.8 show the versatility of this
flue system. Measurements and bends must be cal-
culated correctly so as not to oversize maximum flue
lengths.
All spigot ends that are cut must be de-burred with a
file.
All located ‘0’ rings must be lubricated with a sili-
cone 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.
Sampling point
Sampling point is positioned on the outlet of the twin
flue header for the use of sampling gas combustion
products.
Condensing trap
To drain the exhaust pipe only with a greater dis-
tance of over 6 metres, a condensating trap must be
fitted, or as an alternative to this the sampling point
may also be used as a condensating drain should
this be required.
Exhaust/suction system with concentric pipes for flat
or sloping roofs. Extensions with two separate pipes.
Maximum distance D = I + E + T = 14 metre + 14 metre
+ 1 metre = 29 metre maximum (pipe + terminal).
Exhaust terminal must not be cut.
NOTE: The pressure loss for each elbow fitted is:
90” elbow less 4 metre of pipe length for each one
fitted.
45” elbow less 1.5 metre of pipe for each one fitted.
For exhaust pipe with a distance of over 6 metre a
condensing trap must be fitted.
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Страница 55: ...Chartists Way Morley Leeds LS27 9ET Telephone 0113 252 7007 Tfax 0113 238 0229...