Alpha Technologies Fiber Backhaul Enclosure (FBE) - Manual (Page 17)

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2.0 Installation
021-081-B0-001 Rev.A
2.4 Enclosure Cooling
Consultation with Alpha Applications Engineering is required. Provisions must be made for adequate air
fl ow in the cabinet, equipment total heat dissipation load inside the cabinet, equipment min/max operating
temperatures, equipment over-temp fail safe shutdown capability, environmental outdoor design conditions,
and battery back up run times.
NOTE:
• Cooling capacity 200W dissipated with 10ºC rise over ambient.
• Two 100 CFM fans with variable speed temperature control.
• Fans are off below 25ºC. Fans increase from 40% to 100% with increased enclosure temperature
from 25ºC to 45ºC. Power to the Fan Control PCBA must be provided by a circuit breaker or fuse. 5A
recommended; 10A maximum.
• Form C dry contact alarm, fan fail, open on alarm.
• Maximum power draw 23W.
2.5 Cabinet Air Filtration
The system has an electrostatic fi lter that should be inspected for cleaning or replacement every six
months depending on time of year or environment. Clean the fi lters by back fl ushing with water in the
direction indicated and reinstall the fi lter with air fl ow direction pointing into the enclosure and drain
holes at the bottom.
Some environments may require more frequent inspections to maintain optimum airfl ow.
NOTE: