Connecting A Conventional Flue; Balanced Flue Systems - Grant Vortex Pro Internal Combi Series Installation And Servicing Instructions

9.3 COnnECtinG a COnVEntiOnaL
fLUE
If the Grant 'Orange' flue system is being used – follow the
instructions supplied with the flue kit.
If the Grant 'Green' system (100 mm rigid twin-wall flue) is to be
fitted to the boiler then the Grant CF adaptor kit (product code:
CFA15/70) must be used – refer to Section 1.3.
To fit the adaptor kit, proceed as follows:
1. Fully screw the length of threaded studding (provided in the
kit) into the nut located in the centre of the boiler flue outlet.
2. Fit the boiler connector (from the CF adaptor kit) over the
threaded studding.
3. Position flange on to the neoprene gasket around the boiler
flue outlet, ensuring that small spigot on the base of the
connector is located in the hole in the centre of the neoprene
gasket and that end of studding passes through the hole in
the of the spacer bracket.
4. Fit washer and wing nut provided onto the end of threaded
studding and secure connector in position by tightening down
on wing nut – as shown in Figure 9-8.
5. Fit the flue adaptor (from the adaptor kit) into the boiler
connector.
figure 9-8: Boiler flue connector
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Lubricate the seal on the adaptor using the lubricant
provided before attempting to fit the flue adaptor.
6. Fit the first section of flue into the flue adaptor and secure
using the clamp band provided.
7. Assemble the remainder of the flue system as required,
lubricating the seal on each component before fitting.
page 30
9.4

BaLanCED fLUE SYStEMS

Apart from a conventional flue, several balanced flue options are
available for use with the Grant Vortex boilers.
All are suitable for use with Class C2 Kerosene.
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None of the flue sections in the following system can be cut.
LOW LEVEL hORizOntaL BaLanCED fLUE
(YELLOW SYStEM)
Available in Short (for single thickness brick walls) and Standard
kits.
Extensions are available which extend the flue by 225 mm, 450
mm or 675 mm.
90° and 45° elbows are also available.
The maximum flue length - from the centre of the boiler flue outlet
to the outer face of the wall - is 4 metres (with or without elbows
included).
No more than 2 x 45 or 1 x 90 elbow should be fitted per system.
The low level balanced flue (Yellow system) is supplied with a
stainless steel guard. This must be fitted in all circumstances to
prevent objects from entering the flue outlet.
The guard must be fitted centrally over the flue terminal and
securely fixed to the wall.
figure 9-9: Low level balanced flue
Section 9: flue System and air Supply