Beeston Heating ACER 60 Design Manual page 10
Wall-hung condensing premix gas fired boiler 60-180 kw
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Bees ton ACER wall-hung c ondens ing boiler 60-180kW
D ESIGN MANUAL
3- Concentric flue system can be horizontal
through the wall or vertical through the roof,
available in two flue system sizes, 80/125
system for the Acer60 and 100/150
system for Acer 80 and Acer 100 only.
The Acer models 60, 80 and 100 are
supplied as standard with concentric flue
connection, when other flue systems
arrangement are required, conversion
kits must be specified and are available
from Beeston as optional extra.
Flue conversion kits part numbers are:
•
ACERFCK1, for Acer 60.
•
ACERFCK2, for Acer 80 and
Acer 100.
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6.2.2 Fue length requirement for single boiler
Appliance
Maximum pipe
length in metres
Model
for flue system
80 mm diameter
ACER 60
ACER 80
ACER100
ACER 120
ACER 150
ACER 180
The above pipe length does not include the number of bends used in the flue and the air supply
system. The eauivalent length stated below for each bend must be added to the total pipe length.
Example: ACER80 with 8 metres flue duct 100 mm diameter and 2 X 90 deg Bends this means:-
The total flue system length = 8 metres + 2 X 1.5 metres = 11.0 metres.
Elbows Equivalent length in metres
90 degrees
45 deg
Note: see typical flue installations section 6.3
Maximum pipe
Length in metres for
flue system
100 mm diameter
7.0 m
21.5 m
3.5 m
13.5 m
N/A
11.0 m
N/A
N/A
N/A
1.25 m
1.0 m
1.25 m
4- Multiples of boilers (two or more) can be
connected to a suitable horizontal common
header and a vertical flue stack. Fresh air for
combustion can be taken from the plant room,
where
ventilation, or from the outside by means of a
suitable air duct connected to the boilers.
6.2
Flue length requirements
6.2.1 The maximum stated pipe length in metres for
both the air supply and flue gas discharge
ducts is the distance between the boiler
connection and the roof or wall terminal. The
table below is a guide for single boiler
installation only.
Maximum pipe
length in metres for
flue system
130 mm diameter
38.0 m
30.0 m
24.5 m
N/A
20.0 m
N/A
16.0 m
N/A
13.0 m
1.5 m
1.75 m
P a g e 1 0
the
plant
room
has
Maximum pipe
length in metres for
flue system
150 mm dia.
38.0 m
32.5 m
27.0 m
20.5 m
2.0 m
2.5 m
2.0 m
adequate
N/A
N/A
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