Flue systems Cyclone BFC

Installation options

C13

B23

C33

C53

C43

Flue systems Cyclone BFC

Minimum space requirements

BFC 28-60

BFC 80-100

A Cyclone BFC water heater should be installed according category B23, C13, C33, C43 or C53*.

 

BFC 28

BFC 30

BFC 50

BFC 60

BFC 80

BFC 100

Concentric

 

 

 

 

 

 

 

 

 

 

 

 

 

Diameter (mm)

80/125

100/150

100/150

100/150

130/200

130/200

 

 

 

 

 

 

 

Max. length (m)

40

40

40

15

15

15

 

 

 

 

 

 

 

Max. 45/90° bends

7

7

7

4

3

3

 

 

 

 

 

 

Parallel (standard diameter)

 

 

 

 

 

 

 

 

 

 

 

 

Diameter (mm)

80

100

100

100

130

130

 

 

 

 

 

 

 

Max. length (m)

25

80

45

25

115

60

 

 

 

 

 

 

 

Lequivalent/bend 90° (m)

3,9

4,6

4,6

4,6

2,4

2,4

Lequivalent/bend 45º (m)

1,1

1,2

1,2

1,2

1,4

1,4

Parallel (larger diameter for more length)

 

 

 

 

 

 

 

 

 

 

 

Diameter (mm)

100

130

130

130

150

150

 

 

 

 

 

 

 

Max. length (m)

100

100

100

100

100

100

 

 

 

 

 

 

 

Lequivalent/bend 90º (m)

4,6

2,4

2,4

2,4

2,6

2,6

Lequivalent/bend 45º (m)

1,2

1,4

1,4

1,4

1,6

1,6

*All Cyclone BFC are also approved for installations where the unit is supplied without venting materials (C63).

Concentric flues

It is not permitted to use more than the specified number of bends, even when the duct is shorter than the maximum length. A 45° bend is equivalent to a 90° bend.

Parallel flues

-The maximum permissible length should be reduced by the equivalent length of each bend. (Note: for a parallel installation this means that 3 changes in direction amount to 6 bends (3 in the supply duct and 3 in the flue).

-The maximum length also applies if a parallel installation has different supply and flue duct lengths (B23, C53).

-Combined flues (C43) shall be fitted with a condensate drain.

Note: horizontal flue runs must be installed with a fall of at least 5 mm per metre.

 

BFC 28

BFC 30

BFC 50

BFC 60

BFC 80

BFC 100

 

 

 

Ø80/125

Ø100/150

Ø100/150

Ø100/150

Ø130/200

Ø130/200

 

 

Minimal space for wall duct (mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

550

550

550

550

640

640

 

 

 

 

 

 

 

 

 

 

 

W

725

790

790

790

940

940

 

 

 

 

 

 

 

 

 

 

 

X

1535

2075

2075

2075

2230

2230

 

 

 

 

 

 

 

 

 

 

pleaseapply,conditionsand refer to our website

Y

1460

1480

1480

1480

1620

1620

changetosubjectINT/1108/BFC/04

 

 

* Distance without concentric pipe between bend and wall duct.

 

Y *

1010

1030

1030

1030

1170

1170

 

 

Minimal space for roof duct (mm)

 

 

 

 

 

 

V

1305

1500

1500

1500

1730

1730

 

 

W

680

1035

1035

1035

1120

1120

 

 

X

2965

3325

3325

3325

3620

3620

 

 

X **

2015

2375

2375

2375

2670

2670

 

 

Y

1575

1415

1415

1415

1560

1560

 

 

 

 

 

 

 

 

 

 

 

Y **

625

465

465

465

610

610

 

 

 

 

 

For the parts numbers of components and flue gas ducts, etc.

 

 

please refer to the “Maintenance and accessories” chapter.

 

 

 

 

 

 

 

 

 

Data Terms

** Distance without concentric pipe between appliance and roof duct.

 

 

 

 

www.aosmithinternational.com

Page 6
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A.O. Smith BFC - 50, BFC - 100, BFC - 28 manual Installation options, Minimum space requirements

BFC - 100, BFC - 50, BFC - 28 specifications

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