P.LEMMENS HRup 450 TAC5 Manuel D'installation Et De Maintenance page 34

3. Inspection and cleaning of the inside of the unit:
- Vacuum clean any accumulation of dust in the unit.
- Inspect and gently vacuum clean if need be the heat exchanger. Use brush accessory to protect fins.
- Clean the possible condensation marks and possible accumulations in the drainpan.
- Clean drainpan
- Clean the inside of the bypass. To access interior of bypass it is necessary to force-open it, proceed as
follows: jump terminals IN4 and +12V on the CB4 TAC5 circuit board. The bypass is now open, independently
of temperature conditions.
- Remember to remove jump between terminals IN4 and +12V once cleaning of bypass is done
4. Fan maintenance:
Check again if power supply is shut down and fans are not running.
Check cleanness of fan. Clean if necessary, be careful not to alter balancing of the fan wheel (do not remove
balancing clips). Dismount fans if necessary.
5. Check airtightness of unit:
Particularly check that side access panels are well closed and that airtightness seals are in a good state.
Replace if necessary.
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Although we put a lot of care in the making of our documentation, we cannot be held responsible for any error and/or
omissions that could have slipped in.
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