Vertiv NetXtend Flex 20 - Fan Speed Low

120mm FAN RPM
Internal Cabinet Temperature (max.), deg C
1000
2000
3000
4000
5000
40 7050 60 63 67
Int. fans turn
“on” at 1500
rpm @ 30C to
circulate air
1500 rpm fixed speed (both
Int. and Ext. loop same)
OFF
6000
4200
Range of speeds,
per P/I Control
code
At 67C, all fans go full speed
120mm Axial Fan - 1000W and 1450W Heat Exchanger Control Algorithm
NetXtend Flex “APC” CODE
FAN RPM vs. Cabinet Internal Temperature – INCREASING TEMPS
At 63C, Ext. fans limited to
4200rpm, Internal fans not
limited
LEGEND
120mm Axial Fan Speed
5000 rpm @ 54.0vdc (or 27.0vdc)
for increasing temperatures
1500
30
A
B
C
D
E
F
20
Ext. fans turn
“on” at 1500
rpm @ 40C
G
High Temp
Alarm
Temps rising
FULL SPEED
120mm FAN RPM
Internal Cabinet Temperature (max.), deg C
1000
2000
3000
4000
5000
40 7050 60 63
Int.
fans
turn
“off” at
21C
1500 rpm fixed speed (both
Int. and Ext. loop same)
OFF
6000
4200
Range of speeds,
per P/I Control
code
Temp falling, all fans at full speed
120mm Axial Fan - 1000W and 1450W Heat Exchanger Control Algorithm
NetXtend Flex “APC” CODE
FAN RPM vs. Cabinet Internal Temperature – DECREASING TEMPS
At <65C, Ext. fans limited to
4200rpm, Internal fans not
limited
LEGEND
120mm Axial Fan Speed
5000 rpm @ 54.0vdc (or 27.0vdc)
for decreasing temperatures
1500
30
H G
E
C
B
20
Ext.
fans
turn “off
at 26C
A
6521 26 67
D
F
FULL SPEED
NOTE: Shown are turn off points for
1000W. For 1450W Heat Exchanger,
turn off points are 25C (Int.) and 30C
(Ext.)