GV 640 Service Manual 87
For internal use only
Removing
1. Remove the two Torx screws on the exterior
of the containers.
2. Bend the protective cover of the impeller
metre outwards and disconnect the plug
connection.
3. Remove the hose clamp from the water
intake and pull of the supply hose.
4. Release the catches on the front of the
dishwasher.
5. Pull the heat exchanger out carefully to the
front. To do so take it out of the holder on the
back of the dishwasher and take it off.
Installation
Assembly is carried out in reverse order.
8.8 Expansion opening
The expansion opening connects the heat exchanger to the rinsing cavity.
The air in the rinsing cavity will expand during the heating process. The air escapes through the expan-
sion opening so that no excess pressure can build up and push the door open.
If the door is opened when the dishes are warm, cold air will get into the dishwasher.
If the door is closed this cold air will be heated up by the hot dishes and will expand. Excess pressure
builds up.
This excess pressure is transport-
ed to the heat exchanger through
the expansions opening where it is
reduced through a small vent hole.
1 Expansion opening
Please note!
After many hours of operation the
heat exchanger may stick to the
bitumen insulation material and
cause problems with demounting.
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