Flue System and Air Supply
Page 29
If required, it is possible to use the white painted single-wall straight
fl ue extensions, adjustable extensions and elbows from the Grant
‘Orange’ system for the internal section of the fl ue system, see Figure
9-6. These components can be fi tted between the boiler connector
and fl ue adaptor. The fl ue adaptor, to which the external twin-wall
‘Green’ fl ue components are connected, can therefore be situated
just before the fl ue system passes through the wall.
The maximum vertical height (from the top of the boiler to the
terminal) for the 100 mm diameter hybrid ‘Green/Yellow’ system is
8 metres.
Grant ‘Green’ twin-wall fl ue is recommended for externally run
fl ues to reduce the possibility of the condensate freezing in the fl ue.
No part of any fl ue system should be made of an asbestos material;
aluminium must not be used in any part of the fl ue.
Only stainless steel fl ue components should be used.
If the draught conditions are satisfactory, the fl ue should terminate
with a standard cowl.
Refer to the locally applicable Building Regulations, BS 5410:1 and
OFTEC Installation Requirements (OFTEC Technical Books 2 and 4)
for further guidance on conventional fl ue systems.
Only use fl ue systems suitable for oil fi red condensing boilers.
Do not use fi re cement. The use of high temperature silicone sealants
is recommended.
FLUE LINING KITS
Grant EZ-Fit Flexi Pack conventional fl ue system (Orange
System)
A range of Flexi pack conventional fl ue lining kits are available from
Grant Ireland. The packs have been specifi cally produced for Grant
Vortex oil fi red condensing boilers.
The pack includes a terminal/top plate/fl exi fl ue adaptor, stainless
steel smooth bore fl exible fl ue liner, a rigid to fl exi adaptor and a
boiler fl ue connector.
Two diameters are available, a 100 mm for models up to 46 kW
and 125 mm for models above 46 kW.
Table 9-4:
Conventional fl ue kits
Product code
Flexi pack (Orange system)
GFKIT 6/100
100 mm diameter x 6 metre
GFKIT 6/125
125 mm diameter x 6 metre
GFKIT 8/100
100mm diameter x 8 metre
GFKIT 8/125
125mm diameter x 8 metre
GFKIT 10/100
100mm diameter x 10 metre
GFKIT 10/125
125mm diameter x 10 metre
GFKIT 11/100
100mm diameter x 11 metre
GFKIT 11/125
125mm diameter x 11 metre
GFKIT 12/100
100mm diameter x 12 metre
GFKIT 12/125
125mm diameter x 12 metre
GFKIT 14/100
100mm diameter x 14 metre
GFKIT 14/125
125mm diameter x 14 metre
GFKIT 16/100
100mm diameter x 16 metre
GFKIT 16/125
125mm diameter x 16 metre
Extensions
A range of white powder coated single wall extensions are
available to connect the boiler to the fl exible liner.
The nominal diameter of the extensions is 100 mm or 125 mm.
Extensions are supplied with locking bands.
Table 9-5:
Extensions
Product code
Extensions (Orange system)
WX 150/100
100 mm diameter x 150 mm
WX 150/125
125 mm diameter x 150 mm
WX 250/100
100 mm diameter x 250 mm
WX 250/125
125 mm diameter x 250 mm
WX 450/100
100 mm diameter x 450 mm
WX 450/125
125 mm diameter x 450 mm
WX 950/100
100 mm diameter x 950 mm
WX 950/125
125 mm diameter x 950 mm
Flue extensions cannot be cut.
Also available are:
• An adjustable extension (235 to 300 mm)
• 45°
elbow
The Grant Orange system fl exible stainless
steel liner is directional. The arrows marked on
the liner MUST be pointing vertically upwards,
following the direction of the fl ue gases.
Failure to comply with this instruction could
lead to a leakage of condensate from the fl ue
liner.
NOTE
As no fl ue adaptor is supplied with the boiler,
in order to correctly connect the hybrid system,
it will be necessary to purchase the Grant CF
adaptor kit (product code: CFA15/70).
NOTE
Grant ‘Orange’ system single-wall fl ue
components must not be used externally.
NOTE
To comply with the requirements of the
Building Regulations - conventional fl ue
systems must have a fl ue data plate. A suitable
data plate is supplied with the Grant Orange
fl ue system and should be displayed next to
the boiler or fl ue.
NOTE
The rigid fl ue between the boiler and fl exible
fl ue liner should incorporate an adjustable
section to allow inspection and cleaning of the
fl ue system.
NOTE
