Flue System; Flue Terminal Positions - Navien LCB700-21RS Installation & Operation Manual

6. Flue System

WARNING
Improper flue of the boiler can result in excessive levels of
carbon monoxide, which can lead to severe personal injury.
Flue should be performed only by a licensed professional.
No specific ventilation is required in the room the boiler is
installed in. If it is installed in a cupboard or compartment, no
specific ventilation is required, providing the aforementioned
dimensions are observed. The requirements and
recommendations stipulated in the Regulation for Heating
Installations in Buildings (RITE) and any other applicable
legislation in this field must be observed.

6.1 Flue Terminal Positions

CAUTION
The terminal must be fitted with suitable protection if it
is less than 2 m from a balcony, on a flat roof or surface
that could be accessed by people.
The wall that the gas removal and air intake ducts are
fixed to must not be made of combustible or flammable
materials. The wall that the end of the duct passes
through must lead to the outside of the home. There
must be no hazardous materials or obstructions near the
duct.
If the outlet passes through a wall made of combustible
material the end terminal must be covered with at least
20 mm of incombustible material and must maintain a
distance of at least 50 mm from any flammable material.
The parts connecting the flue outlet must be correctly
joined using sealing gaskets. Ensure that there are no
leaks from any part of the removal circuit.
Switch off the boiler and wait for the pipes to cool down
before cleaning the gas removal and air intake ducts.
The gas removal and air intake ducts must be protected
from snow accumulation.
The installation of the flue exhaust and combustion air
intake system must be calculated and made by sufficiently
qualified and authorised staff. On designing and mounting the
installation, all national and local regulations, standards and
stipulations applicable at the time of installation must be taken
into account.
34 Flue System
The minimum distances between the flue exhaust terminal and
the building elements must comply with those shown in the
following table:
G
F
D
J
E
L
Terminal Position
From openings (e.g. doors, windows,
A
ventilation grilles)
B Under a cornice
C Under a gutter or drainpipes
D Under a balcony or car port roof
E From vertical drainpipes
From internal and external corners of
F
the building
G From the ground, roof and balconies
H When no other outlet is installed
From the wall with the pipe to the front
I
wall
From openings (e.g. doors, windows)
J
under the roof
K Vertically from a flue
L Horizontally from a flue
Vertical flue clearance (Non
M
combustible building material)
N From a front surface with openings
B
B,C F
M
G
A
F F
A
A
G
N
K
Minimum
Distance (mm)
300
200
75
200
150
300
300
600
1200
1200
1500
300
500
2000