Valcom v1040 사용자 설명서

 

 

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In a sheetrock ceiling installation it is necessary to install the preconstruction ring and backbox assembly 
before the installation of the sheetrock.  Referring to Figure 3 mount the backbox to the speaker mounting 
ring and attach the assembly to the ceiling joists using the appropriate hardware.  Cut a 12 1/8” diameter 
hole in the in the sheetrock to provide clearance for the speaker mounting ring and backbox assembly.  
Before continuing speaker installation using a small screwdriver set Volume Control to 2/3 
rotation. Place the large rubber O-ring on the back of the speaker assembly and using the four screws 
equipped with washers and O-rings mount the speaker assembly to the speaker ring/backbox assembly.  
Do not over-tighten the speaker mounting screws.  Hand-tighten only. For a proper seal the large O-ring 
should compress slightly.  It is not necessary for the edge of the metal grille to touch the ceiling for a 
proper seal.  Refer to Figure 3.