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7. Concentric flue system CC
The concentric flue system consists of a 100 mm Ø inner flue concentric with a 150 mm Ø outer flue, or a 130
mm Ø inner flue concentric with a 200 mm Ø outer flue. These flues have been set up concentrically; the combustion gases are exhausted through the internal flue while the fresh combustion air is supplied between the internal and external flues.
7.1 Components of the concentric flue system. (See page 28)
Different connections are possible using the concentric flue system. These are:
Through the roof face and through the exterior wall.
The layout used for this system can be laid in different ways but there are a few important conditions:
* The maximum allowable vertical flue length is 12 metres (the sum of the flue length and the calculation
lengths for the bends).
* 90° bends have a 2-metre horizontal calculation length.
* 45° bends have a 1-metre horizontal calculation length.
* The outlet can be installed at any point on the roof face or exterior wall (supply and discharge in an identi cal pressure area), but must meet applicable regulations.
• Duct pathways may not be insulated.
Important
* Ensure the restriction plate is mounted in the correct manner, as indicated in these instructions.
* The correct restriction plate will provide the unit with the most optimal efficiency, flame image and com bustion.
* Mounting an incorrectly placed restriction plate may cause malfunction of the unit.
DESCRIPTION SIZE (mm) CODE NR. STAINLESS STEEL
Ø 100 Ø 130
A) CONCENTRIC PIPE 1000
500
250
401410100000 / 401510100000
401410050000 / 401510050000
401410025000 / 401510025000
B) 45° BEND (2 PIECE SET, Ø 100 ONLY) 401420045002 / 401520045000
C) WALL BRACKET 401430110000 / 401530110000
D) 90° BEND 401420090000 / 401520090000
E) ADJUSTABLE WALL BRACKET 401430120000 / 401530120000
F) CONCENTRIC FITTED PIPE 250 401412025000 / 401512025000
G) UNIVERSAL MOUNTING PLATE 401450150000 / 401550150000
H) CLAMPING STRIPS 401430100000 / 401530100000
I) CENTRING PLATES (SET) 401450130000 / 401550130000
J) FLAT ALUMINIUM ROOFING SHEET 401472000000
K) STORM COLLAR 401470100000
L) EXTERIOR WALL DUCT 401450160000 / 401550160000
M) LEAD ROOFING SHEET, SLOPING 20-45° 401476020000
N) ROOF PASS-THROUGH 401450180000
O) ROOFING SHEET, SLOPING 5-30° 401474005000
P) REDUCER Ø 130 TO Ø 100 401500000170
CC FLUE SYSTEM ARTICLE NO.s