Huawei DBS3900 Installation Manual page 114

DBS3900 LampSite
Installation Guide
l
Issue 06 (2015-10-30)
Figure 8-19 Locking the protection screw
(1) M4 threaded hole
Installation on an overall suspended ceiling
This installation mode applies when the suspended ceiling (for example, made of plaster
board) cannot be removed.
a. Determine the position for installing the pRRU3902 based on the construction
blueprint and the clearance requirements.
NOTE
For details about the clearance requirements, see
b. Use a crown saw to drill a hole with a diameter of 60 mm to 65 mm at the
installation position for the pRRU3902, as shown in
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(2) Hole for self-tapping screws
8.1.3 Space
8 Installing a pRRU3902
(3) Quincunx screw
Requirements.
Figure 8-20.
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