3460 Fast’R

Cooling for One or Two Enclosures

When one or two enclosures are mounted in a rack or cabinet, one directly above the other, with no other equipment directly below, natural convection provides sufficient airflow through the enclosures.

When one or two enclosures are rack-mounted with other equipment directly below that produces rising heat, a 9 cm space is required between the enclosure and the other equipment to exhaust hot air from below. A deflector must be fitted into this space to avoid mixing the air flows (Figure 1-5).

Accessway

9 cm

Airflow

Airflow

Deflector

Other Heat-

Producing

Equipment

Front of Rack

Rear of Rack

Figure 1-5. Cabinet ArrangementOne or Two Enclosures

Cooling for Three or More Enclosures

When three or more enclosures are mounted in a rack or cabinet, forced-air cooling with fans and a deflector is required.

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Motorola 3460 manual Cooling for One or Two Enclosures, Cooling for Three or More Enclosures