DBS3900 LampSite
Installation Guide
9 Installing a pRRU3907 or pRRU3916
Issue 08 (2016-05-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
183
It is recommended that the separate mounting kit be 1200 mm (47.24 in.) to 1600 mm (62.99 in.) above
the ground.
Step 2
Drill holes at the anchor points and install expansion bolts in the holes, as shown in Figure
9-10.
Figure 9-10
Drilling a hole and inserting an expansion bolt assembly
(1) M6x60 bolt
(2) Nut
(3) Spring washer
(4) Flat washer
(5) Expansion tube
1.
Use a hammer drill with a φ8 bit to drill holes vertically at the marked anchor points.
Ensure that the depth of each hole ranges from 45 mm (1.77 in.) to 50 mm (1.97 in.).
Take proper safety measures to protect your eyes and respiratory tract against the dust before
drilling holes.
2.
Use a vacuum cleaner to clear the dust out from inside and around the holes, and
measure the distances between holes. If any of the holes is beyond the acceptable range,
mark a new anchor point and drill a new hole.
3.
Tighten the expansion bolts slightly, and place each expansion bolt vertically into each
hole.
4.
Use a rubber mallet to pound each expansion bolt until the corresponding expansion tube
completely enters the hole. Leave 20 mm (0.79 in.) of the expansion bolt outside the
wall.
5.
Remove the M6x60 bolt, nut, spring washer, and flat washer in sequence.
Step 3
Place the mounting kit onto the wall, insert four M6x60 bolts into the tapped holes on the
mounting kit, and tighten each bolt to 5 N·m (44.25 lbf·in.) to secure the mounting kit, as
shown in Figure 9-11.
