Step 2 Place the DCDU against the wall, and use a marker to mark the holes for installing screws
securing mounting ears, as shown in the following figure.
Figure 10-10 Marking the positions for installing screws securing mounting ears of the DCDU
Step 3 Drill holes at the anchor points and install expansion bolt assemblies in the holes, as shown in
the following figure.
Figure 10-11 Drilling a hole and inserting an expansion bolt assembly
(1) M6x60 bolts
(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 50 mm (1.97 in.) to 60 mm (2.36 in.).
BTS3900L (Ver.C)
Installation Guide
10 (Optional) Installing the Modules
Issue 07 (2013-11-08) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
53
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