4
K
J
I
L
N
O
M
Use a soft brush to clean the fan blades.
Remove dust using a vacuum cleaner.
Caution!
Take care not to damage the fan blades.
Caution!
Take care not to damage the tempera- ture sensor.
•Install all the parts again in the reverse or- der.
•
Install the drain plate (G) again correctly under the heat exchanger. The holes in the drain plate must be on the side of the condensation drain.
Tighten the screws to a maximum torque of 1.5 Nm. This corresponds to roughly level 2 of a normal screw drill.
4.6.2 Filter Cleaning, if Preheater is Fitted
The filter of the preheater (if installed) must be cleaned every 4 years.
•Remove the mains plug (A) from the plug sock- et.
•Pull the filters (B) out of the
•Remove the front plate by removing the screws
•Push the front plate in the direction of the ar- row and remove it from the
•Remove the sealing plate by removing the screws (D).
•Remove the plastic plate (I) in front of the PCB panel by loosening the two screws.
•Loosen the connectors (J) and the earth cable
(J)atthePCBpanelandremove thecableswith the two grommets (K) completely.
•Remove the cable (P) of the PCB panel.
•Remove the bottom (Q) of the preheater.
–The bottom is secured in the electronic carriage by 4 tabs. Two tabs are located on the front side (visible) and two on the rear side (not visible).
•Clean the filter using a brush.
•Remove any caked soiling with a damp cloth.
•Install all the parts again in the reverse order.
•
Install the drain plate (G) again correctly under the heat exchanger. The holes in the drain plate must be on the side of the condensation drain.
Tighten the screws to a maximum torque of 1.5 Nm. This corresponds to roughly level 2 of a normal screw drill.
