Vertiv NetXtend Flex 20 - Page 125

225mm FAN RPM
Internal Cabinet Temperature (max.), deg C
1000
2000
3000
40 7050 60 63 65
Int. fans turn
“on” at 1000
rpm @ 30C to
circulate air
1000 rpm fixed speed (both
Int. and Ext. loop same)
OFF
Range of speeds,
per P/I Control
code
225mm Radial Fan – 2800Watt Heat Exchanger Control Algorithm
NetXtend Flex “APC” CODE
FAN RPM vs. Cabinet Internal Temperature – INCREASING TEMPS
At >65C, all fans go to full speed
LEGEND
225mm Radial Fan Speed
2800 rpm @ 54.0vdc (or 27.0vdc)
for increasing temperatures
30
A
B
C
D
E F
20
Ext. fans turn
“on” at 1000
rpm @ 40C
G
High Temp
Alarm
Temps rising
1500
2800
67
FULL SPEED
225mm FAN RPM
Internal Cabinet Temperature (max.), deg C
1000
2000
3000
40
7050 60 63 65
Int. fans
turn “off”
at 17C
1000 rpm fixed speed (both
Int. and Ext. loop same)
OFF
Range of speeds,
per P/I Control
code
225mm Radial Fan – 2800Watt Heat Exchanger Control Algorithm
NetXtend Flex “APC” CODE
FAN RPM vs. Cabinet Internal Temperature – DECREASING TEMPS
Temps falling, all fans at full speed
LEGEND
225mm Radial Fan Speed
2800 rpm @ 54.0vdc (or 27.0vdc)
for Decreasing temperatures
30
I
H
E
D
C
B
20
Ext. fans
turn “off”
at 22C
A
1500
2800
FULL SPEED
17 22 57
F
G