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INSTALLATION INSTRUCTIONS
CAUTION:
B Where a flue system is not going to be
accessible, provision must be made for
service and inspection.
B Voids containing concealed flues must
have at least one inspection hatch no less
than 300mm square.
B Flue joints within the void must not be
more than 1.5M from the edge of the
inspection hatch.
B Inspection hatches should be located at
changes of direction.
B If this is not possible, bends should be
viewable from both directions.
6.9.2
CALCULATION OF THE MAXIMUM FLUE PIPE
LENGTH Ø80/125 MM
How to calculate the total length of the concentric flue
pipes:
B Determine the total length of the concentric flue
pipes and enter in table 8, line 1.
B Count the number of 90° elbows used, multiply by
2m, and enter that value in table 8, line 2.
B Count the number of 45° elbows used, multiply by
1.5m, and enter that value in table 8, line 3.
Do not count terminals and first elbow.
Concentric flues
1
Straight section length
2
90° elbows (qty)
3
45° elbows (qty)
4
Total equivalent flue length=
Tab. 8
EXAMPLE
Concentric conduct:
• 4 units of 1m straight sections
• 1 unit of 1m straight section
– Total length = 5 meters
• 2 - 90° elbows
26
___ x 1 =
________
___x 2 =
________
___x 1.5 =
________
________
EXAMPLE TABLE:
Concentric conduts
1
Straight section length
2
90° elbow (qty)
3
45° elbow (qty)
4
Sub-total:
Tab. 9
Note: Do not count terminal and first elbow.
Total maximum length for concentric flue
pipes must not exceed 8 meters.
6.9.3
CONCENTRIC FLUE KITS - Ø80/125 MM
To install the concentric accessory, proceed as follow;
B Put the blue gasket provided with the appliance
between the appliance and the accessory.
B Tighten the 3 screws supplied with the flue kit.
Fig. 37 Concentric accessory + gasket
1
Flue gasket (supplied with the appliance)
6 720 646 322 (2012/05)
5 x 1 =
5
_1_ x 2 =
2
_0_ x 1.5 =
0
7
6720646322-21.1V
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