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2. Heat exchanger maintenance (once per year).
Some dust may accumulate on the heat exchanger even in case of regular maintenance of the filters. To maintain the high heat recovery
efficiency, regular cleaning is required. To clean the heat exchanger, remove it from the unit and clean the heat exchanger by using
compressed air or a vacuum cleaner. After cleaning, re-install the heat exchanger into the unit.
Heat exchanger removal:
1. Disconnect the unit from power mains.
2. Open the middle hinged door of the unit with the key.
3. Loosen the screws securing the protective plates. Then move the plates so that the screw caps match the holes, and remove the plates.
4. Unscrew the screws holding the drain pan and remove it.
5. Unscrew the beam screws and remove it.
6. Unscrew the screws on the shorter retaining plate, remove it and pull the first heat exchanger to remove it from the unit.
Then unscrew the screws on the second plate and remove the second heat exchanger.
7. After technical maintenance install the heat exchangers in the reverse order.
