34 Flue Syste
m
6.6 Terminating the Flue
Before installing the boiler, deter
m
ine what type of flue
ter
m
ination is appropriate for the installation location and
situation. The subsections that follow describe so
m
e typical flue
configurations.
CAUTION
Minimum Clearance to Metering devices and Relief
equipment.
M
aintain a
m
ini
m
u
m
horizontal clearance of
1.22
m
fro
m
electric
m
eters, gas
m
eters, regulators, and
relief e
q
uip
m
ent. Do not install the boiler above or below
electric
m
eters, gas
m
eters, regulators, or relief e
q
uip
m
ent
unless a 1.22
m
horizontal clearance is
m
aintained.
6.5 Measuring Flue Length
The gas re
m
oval and air intake syste
m
s
m
ay be oriented in any
direction (north, south, east or west). So
m
e special co
m
ponents
such as elbows are used to help reach certain positions. Each
re
m
oval ter
m
inal kit includes an adapter for connection to the
boiler and a re
m
oval ter
m
inal.
The total length of the tubes
m
ust not exceed the
m
axi
m
u
m
value defined.
I
f the re
m
oval installation includes elbows while
calculating the total length you
m
ust take into account that each
elbow has a resistance e
q
ual to a specific linear Le
q
e
q
uivalent
length (see table).
There are two different types of ter
m
inals (horizontal and
vertical), for both the coaxial re
m
oval syste
m
and the dual duct
re
m
oval syste
m
.
Carefully study the diagra
m
s representing the different types of
re
m
oval and select the one that best suits the conditions of your
installation. To choose the re
m
oval accessories re
q
uired for each
installation, see the list of accessories on the NAV
I
EN price list.
Maximum Total Length
Type
Pipe Diameter
(mm)
Orientation
Maximum
Length (m)
Coaxial
Ø60/100
Horizontal
20
Vertical
21
Ø80/125
Horizontal
68
Vertical
70
Dual Duct
Ø80/80
Horizontal
110
Vertical
Equivalent Length of Elbows and Adapters
Type
Pipe Diameter
(mm)
Elbow
Equivalent
Length (m)
Coaxial
Adapter
Ø60/100 ->
Ø80/125
-
0.5
Ø60/100
45°
1.0
90°
1.3
Ø80/125
45°
1.0
90°
2.2
Dual Duct
Ø80/80
45°
1.4
90°
2.2
Summary of Contents for NCB-24LDWE
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