2 Netra ft 1800 Installation Guide • February 1999
■Relative humidity
■Operating: 5 to 85% noncondensing1
■Storage: 10 to 90% noncondensing1
■Elevation
■Operating: 0 to 3000 meters
■Storage: 0 to 12000 meters
Dimensions
■Height: 1466.85 mm (57.75 inches) 33U NOM
■Width:437.60 mm (17.22 inches)
■Depth: 392.8 mm (15.4 inches)
■Weight:Maximum 190.5 kg (420 lb) (excluding rack or AC converter items)
■Maximum rate of heat release for fully configured system: 3000W
(10,200 Btu/hour)
■GR 63 CORE heat release calculation result: 425.4 W per square foot
[3000 W / (3.25 ft x 2.17 ft)] (4579 W per square meter).
These dimensions are for the product without rack-mount flange adapters; the
overall width of the flanges varies according to the equipment mounting
requirements.
The depth given does not include any I/O or power connectors. The power
connectors add 50 mm (2 inches) to the depth.
Airflow Consideration when Mounting in theEquipment Frame
The Netraft 1800 system has been designed to function while mounted in a natural
convection airflow,but to meet the declared environmental specification the
following rules apply.Refer to FIGURE 1-1 on page 1-4 and FIGURE 1-2 on page 1-5.
1. Adequate airflow through the equipment frame must be ensured. The
Netraft 1800 system utilizes internal fans that can achieve a maximum airflow of
840 cfm in free air.
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 airflowexhausts vertically from the top of the
cabinet.
1.Subject to a maximum absolute humidity of 0.024Kg of water per Kg of dry air.