Huawei Technologies Co. Ltd PRU11WIFI 用户手册
DBS3900 LampSite
Installation Guide
Installation Guide
8 Installing a pRRU3902 or pRRU3911 or
pRRU3911+WIFI
Issue 08 (2016-05-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
141
Figure 8-32
Installing steel hangers
Step 3 Install the nuts, spring washers, flat washers, and a U-shaped metal plate onto the steel
hangers, and use a torque wrench to torque the U-shaped metal pla
te to 5 N•m (on M6 steel
hangers) or 12 N•m (on M8 steel hangers). See Figure 8-33.
The edge side of the U-shaped metal plate must face upwards.
The nuts on the underside of the U-shaped metal plate must be completely fixed into the steel
hangers, and the lower surface of a nut cannot be exposed on the end side of steel hangers, as shown
in Figure 8-33.
hangers, and the lower surface of a nut cannot be exposed on the end side of steel hangers, as shown
in Figure 8-33.
Figure 8-33
Installing the U-shaped metal plate onto the steel hangers
(1) Nuts
(2) Spring washers
(3) Flat washers