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7. Make sure the wire is fed into the customized groove so it
is below the top edge (shown in the red circle). Otherwise
the exchanger cannot be pushed back in again.
8. Carefully move the exchanger back into place and push
the sensor back into the slat. The sensor from the electrical
heating element should also be placed here - but in a sepa-
rate slat. Otherwise the slats will expand and the sensors
will fall out.
Refit the unit doors and connect the power supply.