Juniper SRX 5600 Getting Started Manual page 23

Safety Warnings
Only trained and qualified personnel should install or replace the device.
Perform only the procedures described in this guide or the SRX 5600 Services
Gateway Hardware Guide. Other services should be performed by authorized
service personnel only.
Read the installation instructions before you connect the device to a power
source.
Before installing the device, read the guidelines for site preparation in the SRX
5600 Services Gateway Hardware Guide to make sure that the site meets power,
environmental, and clearance requirements for the services gateway.
For the cooling system to function properly, the airflow around the chassis must
be unrestricted. Allow at least 6 in. (15.2 cm) of clearance between side-cooled
routers. Allow 2.8 in. (7 cm) between the side of the chassis and any
non-heat-producing surface such as a wall.
When installing the device, do not use a ramp inclined more than 10 degrees.
Manually installing the device requires two to lift. Before lifting the chassis,
remove components and attach the installation handle as described in the SRX
5600 Services Gateway Hardware Guide. To prevent injury, keep your back straight
and lift with your legs, not your back. Do not attempt to lift the chassis by the
power supply handles.
The device should be mounted at the bottom of the rack if it is the only unit in
the rack.
When mounting the device in a partially filled rack, load the rack from the bottom
to the top with the heaviest component at the bottom of the rack.
If the rack is provided with stabilizing devices, install the stabilizers before
mounting or servicing the device in the rack.
When removing or installing an electrical component, always place it
component-side up on a flat antistatic surface or in an electrostatic bag.
When you install the device, always make the ground connection first and
disconnect it last.
Wire the DC power supply using the appropriate lugs. When connecting power,
the proper wiring sequence is ground to ground, +RTN to +RTN, then –48 V
to –48 V. When disconnecting power, the proper wiring sequence is –48 V to
–48 V, +RTN to +RTN, then ground to ground. Always connect the ground wire
first and disconnect it last.
Do not work on the system or connect or disconnect cables during electrical
storms.
Before working on equipment that is connected to power lines, remove jewelry,
including rings, necklaces, and watches. Metal objects heat up when connected
to power and ground and can cause serious burns or become welded to the
terminals.
Failure to observe these safety warnings can result in serious physical injury.
23
Safety Warnings