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6.7. REVERSE OUTDOOR AIR / INDOOR AIR SIDE
In models CADB-HE-D 04 to CADB-HE-D 33 it is possible to reverse the supply and extract air sides.
EXTRACT AIR
MAINTENANCE
TERMINAL BOX POSITION /
FREQUENCY CONVERTER
FRESH AIR
WATER CONNECTIONS
DEFAULT CONFIGURATION (factory supplied)
SYMMETRICAL CONFIGURATION (confi guration on site)
To carry on this modifi cation it is necessary to make the following modifi cations to the unit:
1. Exchange the supply and extract fi lters as well as the access covers to the fi lters.
2. Replace the labels that identify the function of the air inlet/outlet. To do this, a new set of labels is
supplied with the unit.
3. Replace the electrical connection label existing in the back side of the electrical terminal box with the
one symmetrical label supplied in the accessory bag.
4. Only in cold climates where by-pass is used as part of the defrost strategy of the heat exchanger:
Reverse the direction of the by-pass so that it remains at the supply of the unit.
Fig. 1
Fig. 2
Fig. 3
Fig. 5
Fig. 4
1. Disconnect the heat recovery unit.
2. Remove the side panel (fi g.1).
3. Extract carefully the bypass (fi g.2).
4. Disconnect the electrical connector that feeds the bypass.
5. Turn the bypass according to image (fi g.3 and 4).
6. Reconnect the electrical power connector of bypass.
7. Place the bypass in its housing again (fi g.5), close the panel and start up the unit.
