Preparing for Installation
48
Refer to Power Data and Calculating Heat Output in BTUs for 4700 power and heat ratings.
To prevent a loss of input power, verify that the total maximum load on the circuit
supplying power to the power supply is within the current ratings of the wiring and
breakers.
5.3
Rack Requirements
The 19U-high 4700 chassis is mounted in a standard 19" rack with the fabric boards facing the
front of rack and the Line Board InfiniBand ports and sMB-CM facing the rear of the rack.
The rack should support the mechanical and environmental characteristics of a fully populated
4700 chassis as listed in Environmental Specifications.
The rack mounting holes conform to the IEA-310 standard for 19-inch racks. Precautions
should also be taken to guarantee proper ventilation and ambient temperature is maintained for
air intake at the front of the chassis and exhaust in the rack.
The HyperScale cable guide requires an additional 1U of rack space, making the total
height 20U instead of 19U.
5.4
Clearance Requirements
You should be certain to provide sufficient clearance around the racks to install and maintain
the Grid Director 4700. Clearance specifications are detailed in
(on page
5.5
Site Environment Specifications
The system can continue to operate within specified environmental ranges; however, a
measurement that approaches the minimum or maximum of a range indicates a potential
problem. You can maintain normal operation by anticipating and correcting environmental
conditions before they exceed the maximum operating range.
Refer to
(on page
) for operating and non-operating
environmental site requirements.
5.6
Chassis Grounding
Grounding connection is performed at the customer's site. Connect the chassis to a
reliable earth ground. Ensure that the host is connected to earth ground during normal use.
The ground wire should always be hooked up first and disconnected last.
Never defeat the ground conductor or operate the equipment in the absence of a suitably
installed ground conductor. Contact the appropriate electrical inspection authority or an
electrician if you are uncertain that suitable grounding is available.
