S&P CADB-N-D Installation Manual page 26

7.3. FILTER INSTALLATION
The heat recovery is supplied with mounted filters. On the extract air side, it is possible to install two filters in one fi lter holder, to create the
desired combination: G4+F7, F7+F9, M5+F7, etc... To mount an additional filter, follow this procedure:
Installation two filters
1. Loosen the two sets of filter support brackets.
2. Loosen the two sets of filter support brackets.
3. Fit the second filter ensuring that the direction of air is correct (indicated
in the frame of the filter).
4. Ensure that the first filter the air passes is the lower grade of filtration.
5. Once both filters have been through fitted place the filter supports sym-
metrically and tighten the 4 brackets.
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