Huawei DBS3900 Installation Manual page 518

DBS3900 (Ver.B)
Installation Guide
Figure 14-4 Drilling holes on the concrete pad
(1) Concrete pad (2) Base of the
1.
2.
3.
4.
5.
Issue 06 (2011-09-15)
cabinet
Use a hammer drill with bit 16 to drill holes at the anchor points, and ensure that the depth
of each hole ranges from 52 mm to 60 mm.
CAUTION
l Do not drill holes through the holes in the base by using a hammer drill. Drilling holes
through the holes in the base may damage the paint on the base.
l Take proper safety measures to protect your eyes and respiratory tract against the dust
before drilling holes.
Use a vacuum cleaner to clear the dust inside and around the holes. If the inter-hole spacing
is too wide or too narrow, locate and drill holes again.
Slightly tighten the expansion bolt, and then put the expansion bolt assembly into the hole
vertically.
Use a rubber mallet to hammer the expansion bolt until the expansion tube is buried into
the hole, and then tighten the bolt.
Remove the bolt, spring washer, and flat washer counterclockwise.
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14 Indoor Scenario with DC Power Supply (BBU Installed
(3) M12x60 bolt (4) Spring washer (5) Flat washer (6) Expansion tube
Indoors and RRU Powered Outdoors)
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