Installation manual

installation manual TWIN 80 EN
11
1.8. Permitted flue discharge and air supply resistance
The total resistance of the flue tube and air supply together
may not be greater than 125 Pa.
Indication for the resistance values given in table below apply to
- Flue exhaust flow rate of max 122 m
3
/hour (at 70 ‘C)
- Supply air flow rate of max 96 m
3
/hour (at 20 ‘C)
1.8.1. “Concentric flue and air” system
Concentric system Ø 110/150 mm Ø 100/150 mm
Type 80
Tube per metre 7.5 Pa 9.4 Pa
Bend 90°, R = 1.5 D 7.5 Pa
9.4 Pa
Bend 90°, R = 0.5 D 12.0 Pa
15.0 Pa
Bend 45°, R = 1.5 D 6.0 Pa
7.5 Pa
Bend 45°, R = 0.5 D 10.0 Pa
12.5 Pa
Roof duct 1.25 m 40.0 Pa
40.0 Pa
The concentric system 110/150 mm has been tested. The
test result show a maximum length of 10 meters
horizontally, including 1x bend of 90’ and a standard roof
duct.
Using the system 100/150 mm will reduce the maximum
length to 8 meters.
Please note each additional bend shortens the total
length with a meter in length.
1.8.2. “2 pipe” system
“2 pipe” system Ø 110 mm Ø 100 mm
Type 80
Tube per metre 3,7 Pa 4.6 Pa
Bend 90°, R = 1.5 D 3.7 Pa 4.6 Pa
Bend 90°, R = 0.5 D 6.0 Pa 7.5 Pa
Bend 45°, R = 1.5 D 3.0 Pa 3.8 Pa
Bend 45°, R = 0.5 D 5.0 Pa 6.2 Pa
Roof duct 20.0 Pa 25.0 Pa
1.9. Configurations
Preferably use flue tube materials, roof ducts and exterior wall
ducts with a quality mark.
For the use of plastic exhaust pipes both units are protected with
a flue gas temperature sensor.
In normal operation the application may produce a visible white
condensing “plume”.
The TWIN is approved for application on the drain systems:
B23, C13(x), C33(x), C43(x), C53, C63(x), C83(x).