Grant Vortex Eco 15/21 - Flexible Vertical Balanced Flue (Red System)

21
Grant Vortex Eco Utility Oil Boilers
5. Flexible vertical balanced flue (Red system)
This is a flexible vertical balanced flue system (for the
15/21 and 21/26 models only) designed to be fitted
inside an existing masonry chimney. See Fig. 10d. It
basically consists of three sections:
Concentric white painted flue pipe connected to the
boiler
Vertical concentric flexible flue (flexible stainless
steel flue liner inside a flexible plastic air inlet liner)
Terminal assembly for chimney top mounting
The flue pipe seals are factory fitted and must be
lubricated with the lubricant supplied before assembly.
The Red system is supplied as a separate kit. Flue
extensions and 45° elbows from the White system may
be used to extend the flue between the boiler and the
flexible section of the system.
The maximum vertical straight length of flue, from the
top of the boiler to the top of the terminal, is 20 metres
– using no more than four 45° elbows. Deduct 1 metre
of straight flue length for every elbow used.
Note: If the flexible liners have to pass around an
offset inside the chimney deduct 2 metres of straight
flue length to compensate for this.
4 - GENERAL BOILER INFORMATION
Flue extensions cannot be cut, use adjustable
extensions where required.
Three types of locking band are supplied with the kit.
The first type is painted white and is for connecting
flue sections that butt together (2 of this type of
locking band are supplied). The second type, also
painted white, is to cover the joint on the adjustable
(telescopic) section.
Note: The locking band for the adjustable section is
labelled for easy identification.
The third locking band is plastic and supplied in two
halves. This is to secure the plastic flexible liner to the
adapter.
The flue kit includes a Black coated terminal with
upstand and is designed to be fixed (using the screws
provided) to the top of a masonry chimney.
The flue system may be offset using 45° elbows (ref.
ELB K2145/90). No more than a maximum of four
elbows should be used per system.