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Glow-worm Ultracom cx User Manual

Page 28

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Diagram 10.18

14851

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 87.5º, 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 87.5

o

or 2x45

o

bends fitted, the

maximum length must be reduced by 1 metre, see diagram

10.18.
NOTE: 2x45º bends can replace 1x87.5º bend if necessary.

When using 87.5º 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.
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.