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5. Maintenance
5.1 Cleaning
1.
In addition to removing odours, providing fresh
air and recovering heat, this unit extracts airborne
impurities such as dust, dirt and grease. These
gradually build up and detract from the ef
fi
ciency
and appearance of the unit.
2.
To ensure optimum performance, the unit
should be cleaned every 3 to 6 months or at
periods determined by the level of contamination
experienced.
3.
Isolate the mains power supply.
4.
Undo the two grille securing screws and remove
the grille (Fig. 12).
5.
Pull out the four cylindrical inserts from behind
the grille and remove the
fi
lter (Fig. 13).
6.
Slide out the heat exchanger (Fig. 14).
7.
Wash the grille,
fi
lter and heat exchanger in warm
water using a mild detergent and dry thoroughly.
CAUTION: Keep water away from all electrical
components and wiring within the unit.
If the
fi
lter cannot be cleaned, a replacement
is necessary.
8.
Reassemble in reverse order ensuring the
fi
lter
and heat exchanger are seated correctly. The heat
exchanger shall be positioned with the TOP mark
pinpointing to the front and upwards.
9.
Switch power supply on and check the operation
of the unit.
HR30W
HR30W is
fi
tted with an extra
fi
ne pollen
fi
lter (Art.
No. FR30RF4). Its maintenance is the same as that
of the standard
fi
lter, see Cleaning (section 5.1).
grille
grille
screws
screws
heat exchanger
heat exchanger
spacers
spacers
fi
lter
fi
lter
grille
grille
Fig. 13
Fig. 13
Fig. 12
Fig. 12
Fig. 14
Fig. 14