30 New installation of S8 / S 81 ceiling mountM-30-1382-en S8 / S81 Ceiling Mounts Issue 12.0Printed on 19. 11. 2007Mounting a pre-installation set on ceilings with air-supply ceilingCaution:If the carrier arm systems are installed in air-supply ceilings, the methodof installation must be specifically adapted to the constructional featuresof the type of air-supply ceiling involved.A false ceiling set is mounted to bridge the distance between the struc-tural ceiling and the non-structural false ceiling. The length of the studbolts and spacers used is adapted on site as required.The necessary planning should be performed in consultation with themanufacturer of the air-supply ceiling and Carl Zeiss.When ordering, please specify distance (A), i.e. the distance between thelower surface of the structural ceiling and the lower surface of the falseceiling.Note:e Distance (A) is the height of the false ceiling and must not exceed800 mm. Otherwise, a ceiling substructure must be installed to bridgethe excess distance. Distance (Z) is the height of the air-supply ceiling.e It is essential that the false ceiling set (2,3) and the conduits for thepower lines be installed before the air-supply ceiling is attached. Sub-sequent installation is not possible, for reasons of space.e A manhole (5) which is free from compressed air must be available forthe installation work. The internal diameter (S) of the manhole must belarger than that of the opening in the ceiling (M).e The opening of the manhole to the OR can be closed with a separatecover (7) by the manufacturer of the air-supply ceiling.1 Structural ceiling2 Ceiling anchor plate3 Spacers4 Upper surface of air-supply ceiling5 Manhole6 Interface plate7 Cover of carrier arm system to OR (customer's responsibility)8 Lower surface of air-supply ceiling9 Ceiling panel