Vaillant ecoMAX pro 18 E Instructions For Use Installation And Servicing page 14

7 Flue
7.1 Flue Position and Length
The standard horizontal flue is fitted onto the top of the
boiler.
See Fig. 7.1 and 7.2 to determine whether a standard
flue can be used.
Flue system
The standard 100mm flue system (Art. No. 303 930) is
suitable for installations up to 730 mm measured from
the centre of the boiler flue outlet to the outside face of
the wall.
Flue extensions are available to extend this length up to
10 m (see section 11.2). Both 90° bends and 45° elbows
are also available to increase siting flexibility.
A concentric flue system of 125 mm outside diameter is
available and can be used to achieve flue lengths up to
20 m.
A vertical flue system is also available.
Refer to flue system installation instructions for full
details.
When extension pipes are used the flue system must be
designed to have a continuous fall to the boiler of at least
3° to allow condensate to run out via the drain.
7.2 Flue termination
The following details refer to both flue systems.
a. The terminal must be positioned such that the pro-
ducts of combustion can disperse freely at all times.
b. In certain weather conditions a plume of water vapour
may be visible from the flue terminal. Positions where
this could be a nuisance should be avoided.
c. If the terminal is fitted less than 2 m above a balcony,
above ground or above a flat roof to which people have
access then a suitable terminal guard must be provided
and fitted (A suitable guard is manufactured by: Tower
Flue Components, Morley Road, Tonbridge, Kent, TN9
1RA. Size: 280mm x 280mm x 270mm) reference code
K6.
14
NOTE:
Vertical flues must not terminate within 600-mm
of an openable window, air vent or any other
ventilation opening.
The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any part of the building.
A
G
F
J
E
B
BCD
G
A
F
A F
A
G
Instructions for Use, Installation and Servicing ecoMAX pro
Fig 7.1
Fig 7.2
F
M
L
K
K
L
Fig 7.3