Huawei DBS3900 Installation Manual page 29

RRU3260
Installation Guide
If an RU is installed on the bitumen ground, the RU must be at least 500 mm (700 mm or
more as recommended) away from the bitumen ground. The following describes the space
requirements for installing a single RU on the non-bitumen ground.
Clearance for a Single RU in Standard or Reverse Mode
Figure 3-19
Issue 05 (2014-06-30)
 The recommended clearance ensures normal running and provides an appropriate space for
operation and maintenance (OM). If there is sufficient space, leave the recommended clearance after
installing the equipment.

The minimum clearance ensures normal running and heat dissipation, but OM activities such as
checking indicator status and opening the cabling cavity cannot be properly conducted. If the
installation space is restricted, leave the minimum clearance after installing the equipment.
shows the clearance for a single RU in standard or reverse mode.
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