6.5.4 Dimensions of flue gas outlet pipe
Warning
The pipes connected to the flue gas adapter must satisfy the
following dimension requirements.
d
1
External dimensions of flue gas outlet pipe
D
1
External dimensions of air supply pipe
L
1
Length difference between flue gas outlet pipe and air supply pipe
Tab.16 Dimensions of pipe
d
1
(min-max) D
1
(min-max)
L
1
(1)
(min-max)
60/100 mm 59.3 - 60.3 mm 99 - 100.5 mm 0 - 15 mm
80/125 mm 79.3 - 80.3 mm 124 - 125.5 mm 0 - 15 mm
(1) Shorten the inner pipe if the length difference is too great.
6.5.5 Length of the air and flue gas pipes
The maximum length of the flue gas outlet and air supply channel vary
depending on the appliance type; consult the relevant chapter for the
correct lengths.
Important
When using bends, the maximum chimney length (L) must be
shortened according to the reduction table.
For adaptation to another diameter use approved transitions
Room-ventilated model (B
23
, B
23P
, B
33
)
L
Length of the outlet duct, including roof feed-through
Connecting the flue gas outlet
Connecting the air supply
With a room-ventilated version, the air supply opening stays open; only the
flue gas outlet opening is connected. This will ensure that the boiler
obtains the necessary combustion air directly from the installation area.
Use adapters when using air supply and flue gas outlet pipes with any
other diameter.
Caution
The air supply opening must stay open.
The installation area must be equipped with the necessary air
supply openings. These openings must not be obstructed or
shut off.
Tab.17 Maximum chimney length (L)
Diameter 60 mm 70 mm 80 mm 90 mm
(1)
AMC 15
33 m 40 m 40 m
(1)
40 m
(1)
AMC 25
19 m 35 m 40 m
(1)
40 m
(1)
AMC 25/28 MI
16 m 30 m 40 m
(1)
40 m
(1)
AMC 35
13 m 25 m 40 m 40 m
(1)
(1) While maintaining maximum length, additional 5 times 90º or 10 times 45º
bends can be used.
Fig.26 Dimensions of concentric
connection
Fig.27 Room-ventilated version
6 Installation
7686707 - v.01 - 06092018 AMC 33
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