Zehnder Rittling ComfoAir 350 Instruction Manual - page 25
3
21
System functions
3.9.1 Inspecting the heat exchanger and fans
The fans and the heat exchanger must be inspected
once every 4 years.
•
Disconnect the power from the ComfoAir.
•
Remove the fi lters (B) from the ComfoAir.
•
Release the front panel by unscrewing the
screws (C).
•
Slide the front panel upwards and remove the
front panel from the ComfoAir.
•
Release the cover panel by unscrewing the
screws (D).
C
B
A
D
When reassembling the front cover, the
lower section must fi rst be inserted be-
hind the raised edge to ensure a good
seal.
ComfoAir – Left-hand version
•
Pull the strap (E) to remove the heat exchanger
and the leakage tray (F).
•
Remove the bypass duct (G) in the left-hand
version of the ComfoAir.
ComfoAir – Right-hand version
•
Remove the bypass duct (G) in the right-hand
version of the ComfoAir.
•
Pull the strap (E) to remove the heat exchanger
and the leakage tray (F).
E
F
G
Left-hand
E
F
G
Right-hand
•
Remove the heat exchanger from the leakage
tray (F).
The heat exchanger may contain some re-
sidual water!
•
Clean the heat exchanger, if so required.
–
Submerge the heat exchanger in hot water
(max. 40 °C). Do this a couple of times.
–
Rinse the heat exchanger with clean hot tap
water (max. 40 °C).
–
Clasp the heat exchanger between both
hands (on the coloured side surfaces) and
shake the water from the heat exchanger.
Do not use aggressive cleaning agents or
solvents.
Do not re-install the heat exchanger yet. The fans
also need to be inspected. The steps below explain
how to remove, inspect and (if required) clean the
fans (after cleaning the heat exchanger) :
•
Remove the small plastic panel (I) in front of
the PCB panel by unscrewing the two screws.
•
Release the connectors (J) and the earth wire on
the PCB panel and fully remove the cables in-
cluding the two grommets (K).
•
Remove the entire scroll casing (L) by pressing
the click fasteners (M).
•
Remove the infl ow nozzle (N) by pressing the
click fasteners surrounding the scroll casing.