Chapter 1 Planning for the Installation 3
Placement of a Sun Product
Allow enough room surrounding the cabinet for access to the cabinet and arrays for
maintenance.
Caution – Do not block or cover the openings of your Sun product. Never place a
Sun product near a radiator or heat register. Failure to follow these guidelines can
cause overheating and affect the reliability of your Sun product.
Air cools the system cabinets from front to back. Air enters at the front, circulates,
and is expelled at the back of the cabinet. The front and back door clearances
provide sufficient space for cooling. See Chapter 2 for specific clearance
specifications.
Site Wiring and Power Requirements
The AC power distribution boxes cabinets use common industrial wiring. Consider
the following information when preparing the cabinet installation site:
■ AC power source – The AC power source must provide the correct voltage,
current, and frequency specified on the module model and serial number label.
■ Earth ground – Site wiring must include an earth ground connection to the AC
power source.
■ Circuit overloading – Power circuits and associated circuit breakers must provide
sufficient power and overload protection. To prevent possible damage to the AC
power distribution boxes and other components in a cabinet, use an external,
independent power source that is isolated from large switching loads (such as air
conditioning motors, elevator motors, and factory loads).
■ Module power distribution – All units attached to the two power strips inside a
cabinet must be auto-ranging between 180 and 264 VAC, 47-63 Hz.
■ Power interruptions – A cabinet and modules will withstand the following
applied voltage interruptions (with or without an integrated uninterruptible
power supply [UPS]):
■ Input transient – 0V for 1 cycle with no interruption
■ Duration – 70 percent of nominal for 0.5 seconds and 0V for 5 seconds,
recoverable with user intervention
■ Power failures – If a total power failure occurs, when power is restored the
modules within a cabinet automatically perform a power-up recovery.
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