Glow-worm Ultracom 38cxi Installation And Servicing page 28

10 Vertical Flue - Length, Preparation and Installation
10.11 Vertical flue
The vertical flue system is available as an option where the
boiler position does not permit the use of the top horizontal
flue system.
The system is made up from accessories. The accessories
include terminal assembly, bends 45º and 90º, flue
extensions, fixing bracket and appropriate weather collar, see
diagram 10.19.
The maximum permitted straight flue length is 10 metres plus
the terminal. for each 90 or 2x45
o
length must be reduced by 1 metre, see diagram 10.18.
NOTE: 2x45º bends can replace 1x90º bend if necessary.
When using 90º bends any horizontal extension pipe should
be inclined by a minimum of 44mm/metre (2.5°) towards
the boiler to facilitate condense removal, see (a) in diagram
10.18.
Alternatively use 45º bends to avoid horizontal runs, see (b) in
diagram 10.18.
Supplied By www.heating spares.co Tel. 0161 620 6677
bends fitted, the maximum
o
The terminal siting should be as shown in diagram 4.2.
Measure the distance of flue length required for the
installation.
The flue must be designed with a continuous fall towards the
boiler.
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Diagram 10.18