24
Instruction for the installer
FLUE CONFIGURATION
Ø 80 mm
The maximum allowed pressure drop, apart from the
installation type, cannot be higher than 100 Pa.
Example N.2
Intake of primary air and flue outlet from two external perimeter
walls.
It is not permitted to position the two terminals on opposite
walls.
Example N.1
Intake of primary air from the perimeter
wall and flue outlet from the roof.
The maximum pressure drop of 100 Pa
includes the losses created by:
1 adapter from
1 x Ø60/100 mm to 2 x Ø80
mm
2 wide radius
1 exhaust te
1 air intake terminal
00361435
TSC0130C
TSC0150C
KIT 5750C
KIT 5760C
KIT5750C - KIT 5760C
KIT 5780C
KIT 5770C
TSC0130C
TSC0150C
KIT5750C - KIT 5760C
KIT5790C
00361435
KIT 5750C
KIT 5760C
TSC0130C
TSC0150C
KIT 5770C
CALCULATION OF THE PRESSURE LOSSES
OF THE COMBUSTION AIR INLET/PRODUCTS
OUTLET DUCTS
When calculating the pressure losses bear in mind the
following parameters:
- For the twin flue pipe system’s adaptor, the pressure loss is
of 4 Pa;
- For narrow radius 90° bend Ø 80 (R=
½
D), the pressure
loss is of 14 Pa;
- For each large radius 90° bend Ø 80 (R=
½
D), the pressure
loss is of 4 Pa;
- For each metre of Ø 80 flue pipe the pressure loss is of 1 Pa
in the combustion air inlet;
- For each metre of Ø 80 flue pipe the pressure loss is of 1,5
Pa in the combustion product outlet;
- For the Ø 80 L=1 horizontal combustion air inlet terminal
the pressure loss is of 3,5 Pa;
- For the Ø 80 L=1 horizontal combustion products outlet
terminal the pressure loss is of 5,5 Pa;
- For the vertical flue outlet duct Ø 80 L=1 the pressure loss
is of 8 Pa.
Note: These values refer to flue systems made
with original UNICAL non flexible and smooth
pipes.
