18
Grant Vortex Indoor/Utility, System and Boiler House Oil Boilers
5 Twin-wall flues are recommended for externally
run flues to reduce the possibility of the condensate
freezing in the flue.
6 No part of any flue system should be made of an
asbestos material; aluminium must not be used in
any part of the flue. Only stainless steel flue
components should be used.
7 If the draught conditions are satisfactory, the flue
should terminate with a standard cowl.
8 Refer to the locally applicable Building
Regulations, BS 5410:1 and OFTEC Installation
Requirements (Books 2 and 3) for further guidance
on conventional flue systems.
It is important to ensure that the flue system is sealed
and that condensate cannot escape. Up to 1.5 l/h of
condensate can be produced in a conventional flue
system.
Only use flue systems suitable for oil fired condensing
boilers.
Do not use fire cement. The use of high temperature
silicone sealants is recommended.
Grant EZ-Fit Flexi Pack conventional flue system
(Orange System) - See Fig. 10a
A range of Flexi pack conventional flue lining kits are
available to purchase from your local stockist . The packs
have been specifically produced for Grant Vortex oil
fired condensing boilers.
Contents of Grant EZ-Fit Flexi Pack
The pack includes a terminal/top plate/flexi flue adaptor,
stainless steel smooth bore flexible flue liner, a rigid to flexi
adaptor and a boiler flue connector. Two diameters are
available, a 100 mm for models up to and including 120/155
and 125 mm for the 155/200 and 200/240 models.
4 - GENERAL BOILER INFORMATION
Part No.
WX 150/100
WX 150/125
WX 250/100
WX 250/125
WX 450/100
WX 450/125
WX 950/100
WX 950/125
Extensions (Orange System)
100 mm dia. x 150 mm
125 mm dia. x 150 mm
100 mm dia. x 250 mm
125 mm dia. x 250 mm
100 mm dia. x 450 mm
125 mm dia. x 450 mm
100 mm dia. x 950 mm
125 mm dia. x 950 mm
Part No.
GFKIT 6/100
GFKIT 6/125
GFKIT 8/100
GFKIT 8/125
GFKIT 10/100
GFKIT 10/125
GFKIT 11/100
Flexi Pack (Orange System)
100 mm dia. x 6 metre
125 mm dia. x 6 metre
100 mm dia. x 8 metre
125 mm dia. x 8 metre
100 mm dia. x 10 metre
125 mm dia. x 10 metre
100 mm dia. x 11 metre
Extensions
A range of white powder coated single wall extensions
are available to connect the boiler to the flexible liner.
The external diameter of the extensions is 100 mm or
125 mm (see Table below). Extensions are supplied
with locking bands.
Flue extensions cannot be cut.
An adjustable extension and 45° elbow are also
available. See Fig. 10a.
The rigid flue between the boiler and flexible flue liner
should incorporate an adjustable section to allow
inspection and cleaning of the flue system.
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