Computer Accessories User Manual

2 Netra ft 1800 Installation Guide • February 1999

■ Relative humidity

■ Operating: 5 to 85% noncondensing

■ Storage: 10 to 90% noncondensing

■ 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 the

Equipment Frame

The Netra ft 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

Netra ft 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 airflow exhausts vertically from the top of the

cabinet.

1. Subjectto a maximumabsolutehumidity of0.024Kgof water perKgof dryair.