Huawei DBS3900 Installation Manual page 141

DBS3900 LampSite
Installation Guide

If the screws cannot be tightened using a Phillips screwdriver, use a hex key or an electric screwdriver to
assist the installation.
Issue 08 (2016-05-30)
The delivered bolt (M4X60) is used if the plate thickness ranges from 25 mm to 45 mm.
d. Lead the U-shaped metal plate through the hole on the ceiling, as shown in Figure
8-24.
Figure 8-24 Routing the U-shaped metal plate through the hole on the ceiling
e. Install another bolt with the same length and use a torque screwdriver to torque the
bolts to 1.4 N· m, as shown in Figure 8-25.
Figure 8-25 Assembling the mounting bracket and the U-shaped metal plate
f. Fit the rotation axis on the pRRU into the hooks on the mounting bracket, and then
push the pRRU against the mounting bracket until a click is heard. See Figure 8-26.
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8 Installing a pRRU3902 or pRRU3911 or
pRRU3911+WIFI
134