Alpha Technologies Radium MiniBay - Manual (Page 19)

19 044-001-C0-00, Rev. C
1.0 Overview and Specifications, continued
1.4 Enclosure Cooling Options
Consultation with Alpha Applications Engineering is required. Provisions must be made for adequate air
flow 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:
Fan Filter Cooling Door, 48VDC, right or left hinged: Alpha P/N 745-204-20 (R) or 745-204-21 (L)
• Cooling capacity 1000W dissipated with 15ºC rise over ambient.
• Two 150 CFM fans with variable speed temperature control and low voltage disconnect, hysteresis fixed
at 42VDC.
• Inline 5A fuse.
• Fans run continuously below 25ºC at 40% speed. Fans increase from 40% to 100% with increased
enclosure temperature from 25ºC to 55ºC.
• Form C dry contact alarm, fan fail, open on alarm.
• Maximum power draw 2W.
Fan Filter Cooling Door, 120VAC, right or left hinged: Alpha 745-204-25 (R) or 745-204-24 (L)
• Cooling capacity 750W dissipated with 15ºC rise over ambient.
• Two 115 CFM fans are powered from the included line cord with designated inline 5A fuse and bimetal
thermostat control (Alpha P/N 875-075-20).
• Fixed thermostat set point, close at 29ºC and open at 19ºC.
• Included adjustable enclosure over-temp alarm (Alpha P/N 745-338-20).
• Form C dry contact, open on alarm. Factory setting is 40ºC.
• Maximum power draw 0W.
Heat Exchanger Door, 48VDC, right or left hinged: Alpha P/N 745-204-45 (R) or 745-204-46 (L)
• Cooling capacity 690W dissipated with 15ºC rise over ambient.
• Variable speed fan temperature control and low voltage disconnect. Fans off below 2ºC. Fans turn on at
25ºC and run from 25% to 100% with increased enclosure temperature from 25ºC to 45ºC.
• Two Form C dry contact alarms (Minor: Fan fail, open on alarm and Major: Enclosure over-temp fixed at
60ºC, open on alarm).
• Maximum power draw 120W.
Heat Exchanger Cooling Door,120VAC, right or left hinged: Alpha P/N 745-204-40 (R) or 745-204-41 (L)
• Cooling capacity 690W dissipated with 15ºC rise over ambient
• Heat exchanger fans are powered from included line cord with designated inline 5A fuse and bimetal
thermostat control (Alpha P/N 875-075-20)
• Fixed thermostat set point, close at 29ºC and open at 19ºC
• Included adjustable enclosure over-temp alarm (Alpha P/N 745-338-20). Form C dry contact, open on
alarm. Factory setting is 40ºC.
• Maximum power draw 115W.