15
MAINTENANCE
Maintenance operations of the unit are required 3-4 times per year. Maintenance includes general cleaning of the unit and the following
operations:
1. Filter maintenance (3-4 times per year).
Dirty filters increase air resistance in the system and reduce supply air volume. The filters require cleaning not less than 3-4 times per year.
Vacuum cleaning is allowed. After two consecutive cleanings filters must be replaced. For new filters contact your Seller.
Sequence of filter removal:
1. Unlatch and open the service panel. Open the panel with care.
2. Set the retaining plate aside. Pull the filters until they slide off the guides.
Install the filters in the reverse order.
2. Heat exchanger cleaning (once per year).
Some dust may accumulate on the heat exchanger block 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 the drain pan and the filters from the unit and clean the heat exchanger
by using compressed air or a vacuum cleaner.
Sequence of the drain pan removal:
1. Unlatch and open both service panels. Open the panels with care.
2. Release the drain pipe from the side of the water heater connection and pull it down.
3. Release the second drain pipe by pulling the drain pan aside.
Install the drain pan in the reverse order.
If a more thorough cleaning of the heat exchanger is required, call your service technician.
