Inspecting And Cleaning The Fans - Zehnder ComfoAir 550 Installationsanleitung

D
When reassembling the front cover, the
lower section must fi rst be inserted behind
the raised edge to ensure a good seal.
E
F
8. Pull the strap (E) to remove the heat exchanger
and the leakage tray (F).
9. Remove the heat exchanger from the leakage
tray (F).
Install the leakage tray correctly underneath
the heat exchanger. The slanting side of the
leakage tray must be on the side of the con-
densation drain.
During assembly of the heat exchanger,
check the position of the four rubber seals.
10. Inspecting and if necessary clean the heat ex-
changer.
- Use a soft brush to clean the lamellae.
- Use a vacuum cleaner or air gun (no high
pressure) to remove dirt and dust.
Always clean against the direction of
the airfl ow. This prevent dirt from get-
ting stuck in the heat exchanger.
Only standard exchanger with a green cover and
Enthalpy exchanger with a blue cover:
a. Submerge the heat exchanger several times in
hot water (max. 40 °C).
b. Rinse the heat exchanger with clean hot tap wa-
ter (max. 40 °C).
c. Clasp the heat exchanger between both hands
(on the coloured side surfaces) and shake the
water from the heat exchanger.
Only an enthalpy exchanger with a bleu cov-
EN - 16
er can be washed with water. When having
an Enthalpy exchanger with a white cover do
never wash it with water.
Do not use aggressive cleaning agents or
solvents.
If the fans or preheater element fi lter also
need maintenance do not re-install the heat
exchanger yet.
11. If no more maintenance is necessary install all
parts in reverse order, reconnect the power
and carry out the self-test in accordance with
menu P76.
Fasten the screws to a maximum of 1.5 Nm.
This is roughly equal to speed 2 of an aver-
age battery-powered drill.

2.9.2 Inspecting and cleaning the fans

Check the fans once every 2 years.
1. Remove the heat exchanger as instructed in
the maintenance chapter of the heat exchang-
er.
2. Remove the screw from the electronics car-
riage.
3. Pull the electronics carriage carefully forwards.
4.. Release the connectors (J) and the earth wire on
the control circuit board panel and fully remove
the cables including the two grommets (K).
5. Remove the entire scroll casing (L) by pressing
the click fasteners (M).
6 Remove the infl ow nozzle (N) by pressing the
click fasteners surrounding the scroll casing.
7. Inspecting and if necessary clean the fans (O).
- Use a soft brush to clean the fan impellers.
- Use a vacuum cleaner to remove dust.
K
J
I
M
L
N
O
Do not damage the fan impellers or tempera-
ture sensor.
If the preheater element fi lter also need
maintenance do not re-install the heat
exchanger yet.
8. If no more maintenance is necessary install
all parts in reverse order, reconnect the power
and carry out the self-test in accordance with