Maintenance By The Installer; Inspecting And Cleaning The Heat Exchanger - Zehnder ComfoAir 550 Installationsanleitung

This can be done using the air specifi cations of the
ComfoAir above.
The default settings of the ComfoAir nL are:
Position L 35%
OW
Position M 50%
EDIUM
Position H 70%
IGH
The default settings of the ComfoAir HL are:
Position L 40%
OW
Position M 70%
EDIUM
Position H 90%
IGH
Follow this procedure to programme the ComfoAir
(after installation):
1. Set the ComfoAir in programming mode.
- Display: Press simultaneously for at least 3
seconds on " " and "
pears on the display.
In programming mode, the bypass and Pre-
heater element valves are always closed. Af-
ter 30 minutes, the ComfoAir automatically
terminates the programming mode.
2. Close all windows and outside doors.
3. Close all inside doors.
4. Check the presence of structural overfl ow provi-
sions.
The structural overfl ow provisions must be at
least 12 cm 2 per l/s.
5. Check if both fans function in the three speed set-
tings.
6. Switch the ComfoAir to high speed.
7. Install all valves and set the valves according
to the settings given or as set in the reference
house.
If no data are known:
– Install the valves and open them as far as
possible.
– Measure the air volumes; starting with the
intake air and then the exhaust air.
– If the measured air volumes deviate from
the nominal air volumes by more than +/-
10%, and the majority of the deviations is
positive, ensure that all deviations are posi-
tive. If the majority of all deviations is nega-
tive, ensure that all deviations are negative.
Ensure that one supply valve and one ex-
haust continue to be fully open.
8. Change the fan settings in P menus P30 to P37
of the digital operating device.
– Select the lowest possible setting in order to
conserve energy.
– Ensure that the ratios between low, medium
and high remain equal.
2.9
" until "InR" ap-
2.9.1 Inspecting and cleaning the heat
Use the chart of the ComfoAir's air specifi ca-
tions to set the fans.
9. In the event that the currently set air volumes
still deviate too much: Adjust the valves.
10. Check the entire installation again, after all
valves have been set.
11. Switch the ComfoAir (back) to ventilation posi-
tion 2.
- Display: Press simultaneously for 3 seconds
on " " and " " until "InR" disappears of
the display.

Maintenance by the installer

The following maintenance must be carry out by the
installer:
• Inspecting and (if necessary) cleaning the heat
exchanger;
• Inspecting and (if necessary) cleaning the fans;
• Inspecting and (if necessary) cleaning the pre-
heater element fi lter (If a preheater element is
fi tted).
A concise explanation of these maintenance activi-
ties is given in the paragraphs below.
Check the condensation drain once every 2
years.
Failure to carry out (periodic) maintenance
on the ComfoAir ultimately compromises the
performance of the ventilation system.
exchanger
Check the heat exchanger once every 2 ye-
ars.
1. Disconnect the power (A) from the ComfoAir.
2. Remove the handles (B) from the ComfoAir;
3. Remove the fi lters from the ComfoAir.
4. Release the front panel by unscrewing the
screws (C).
5. Slide the front panel upwards and remove the
front panel from the ComfoAir.
A
B
C
6. Release the cover panel by unscrewing the
screws (D).
7. Remove the cover panel.
15 - EN