6. SETTING
Characteristic Diagram
Diagram 7.1
Constant volumetric flow fans:
The Comfoair 140 is equipped with parallel-flow fans with the latest constant volumetric
flow technology. This means that a precisely defined volume of air corresponds to every
percentage setting (see table above). Intermediate values have to be interpolated.
1. Close all doors and windows.
2. Close the room doors and check the through-flow openings (min. 12 cm² per l/s).
3. Check that both fans run at all speeds.
4. Check that the bypass is closed.
5. Switch the Comfoair 140 to level “2”.
6.
A.
Install the cup valves/grilles and set these according to the characteristics or the
reference dwelling.
OR
B.
If no values are known, set the valves/grilles as far open as possible. Measure the
air flow rates. First the intake air, then the exhaust air. If the values differ by more
than +/- 10% from the nominal value and most of them are in the + range, then set
the valves/grilles so that they are
all in the + range
. If the values are in the – range,
then set the valves/grilles so that they are
all in the – range
. Leave
one air intake
and one air outlet valve open
.
The fan setting can then be changed at the display. In order to minimise energy
consumption, the values should be set as low as possible. Ensure that the
relationship between HIGH, MEDIUM and LOW remains constant. Use diagram 8-1
for this. Use menu P3 of the menu structure to change the speeds.
7. If the air flow rates now still differ too much, these can be set at the valves.
8. Check the complete system after having set all the valves.
9. Record all the measured and set values in the
setting protocol
.
10. Switch the Comfoair 140 to level LOW.
Speed
Qv
(m³/h)
20%
65
30%
75
40% 85
50%
95
60% 110
70%
125
80% 140
90%
155
100% 170
