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2. The inlet air must enter at the bottom of the Netra ft 1800 cabinet and in front of
the Power Supply Units (PSUs); the airflow exhausts vertically from the top of the
cabinet.
3. Inlet and exhaust ventilation require a minimum open area of 400 sq cm (62 sq
inches) each.
4. A minimum of 2U (88.9 mm/3.5 inches) clearance must be allowed at both top
and bottom of the Netra ft 1800 cabinet when mounted unless unobstructed
vertical airflow can be ensured. Refer also to "Vertical Space Requirements" on
page 30.
Note – These dimensions are a minimum; more space may be required in order to
physically install the system in a rack.
5. The Netra ft 1800 system must not be mounted above any heat-generating sources
within the same frame unless a heat deflector is used to provide fresh inlet air at
ambient temperature.
6. To maintain adequate airflow, replace the environmental filters every six months
(contact your local support organization for further information). The
environmental filter replacement kit (X-Option No.X6952A) contains six PSU
filters and three base filters.
Chapter 2
Environmental and Airflow Considerations
9
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