OPERATING INSTRUCTIONS RH RH170

Inspection and servicing

Safety filter element, replace

Replace the safety filter elements (7, Fig. 3-52:) after 1000 operating hours or 3 cleaning cycles; after one year of operation at the latest. Never clean the safety filter element, but always renew.

 Remove main filter element (5, Fig. 3-53:) as described above.

 Check the vacuum indicator (6, Fig. 3-52: resp. arrow Fig. 3-54:) whether - the green spot is visible; in this case the safety filter must not be replaced

- the green spot is not visible; in this case the safety filter must be replaced.

 Unscrew vacuum indicator (6) and withdraw safety filter element (7).

 Install the new safety filter element and a cleaned or a new main filter element.