Heat recovery unit RDAF - Technical manual
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FläktGroup DC_9349GB_20190326_R4
We reserve the right to make changes without prior notice
MAINTENANCE AND CLEANING OF HEAT EXCHANGER AND FANS
GENERAL
The fans, filters and heat exchanger are very important for the opera-
tion and economy of the unit. For this reason, it is crucial for them to
be kept clean and in good condition.
We recommend a general check-up every 6 months. For safety rea-
sons, general caution should be observed during maintenance of the
unit. Be careful to avoid trapping any cables. If necessary, use protec-
tive gloves.
CLEANING OF THE HEAT EXCHANGER
Check that the surface of the rotor is not coated with dust. Clean with
a vacuum cleaner or by blowing through with compressed air. If vac-
uum cleaning is not sufficient, hand-spray with grease dissolving fluid
and then blow clean with compressed air. Use the compressed air to
blow away from the clean side towards the dusty side.
NOTE! Water,
acetone or similar solvents must not be used. We recommend that the
rotor be lifted out by two people.
Figure 4. Before cleaning the heat exchanger, fans etc., the unit should always have
the power disconnected. Pull out the plug.
CLEANING OF FANS
Note that the fans must not be cleaned with water or other fluids; they
may only be vacuum cleaned or brushed.
Figure 5. Open the unit by unscrewing the screws on the unit door (socket 13 mm).
Figure 6. Remove the heat exchanger from the unit. Disconnect the electrical con-
nection to the rotor motor. During reassembly, check that the seals are
positioned correctly.
Figure 7. Vacuum clean the heat exchanger from both sides or blow clean with
compressed air.
Figure 8. Remove the fans from the unit. Disconnect the electrical connection.
Figure 9. Clean the rotor with a brush or vacuum cleaner.
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The drive belt and seals may need replacing due to wear and tear.
Check them for damage and replace if necessary. For designations,
see spare parts list of pages 28–29.
