12 - OPTIONS
A lter with a mesh size of 0.7 mm is factory tted inside the free cooling circuit pipe to protect the micro-channel coils from any
contamination. During system start-up, after a few hours of operation, it is recommended that the cleanliness of the lter is checked
to ensure no debris was been caught in the mesh.
The lters do not have any particular operating requirements. However, the mesh must be cleaned or changed as necessary. To check
the level of fouling, two branch connections (2) are provided upstream and downstream of the lter for the installation of a dierential
pressure sensor (not provided).
Filter replacement procedure
1. Close the free cooling circuit valve and close the manual valve
2. Unscrew the clamp (4) and remove the clamp (3)
3. Swivel the piping so that the lter (1) can be accessed
4. Clean the lter with water or replace it if needed
5. The cleaning frequency for the lter depends on the degree of soiling in the network
6. Ret the clamps and tighten. For the tightening torques for the screws, nuts and bolts, refer to table 13.5 – Tightening torques for
the main fastenings
7. Check that the clamps are correctly sealed
8. Re-open the manual valve.
9. If needed, top up the glycol 30%.
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