Voltage
Phase
FLA
WSA
OPD
880, 940
208/230
3
28.0
28.9
35
460
3
13.6
14.0
20
575
3
11.2
11.6
15
Values are calculated per UL 1995. OPD values may be adjusted higher than calculations to compensate for maximum anticipated application
temperatures.
Table 6.15 60Hz electrical values - Eight-fan drycoolers without pump controls, standard models
Pump hp
Input Power, Volts
208
460
10
30.8
14.0
Values based on NEC handbook values for 3-phase motors.
Table 6.16 60Hz pump FLA values
6.12.2 Low Voltage Control Wiring
NOTICE
Risk of control malfunction. Can cause improper unit operation.
Make sure that all low voltage electrical wiring has been performed per the schematic diagram provided
and that all low voltage wiring connections are tight.
A control interlock between the drycooler and the indoor cooling units is required. Field-supplied copper
wire is required for connection between like-numbered Terminals 70 & 71 on both units for remote On/Off
control of the drycooler, synchronized with the indoor unit. Wiring must be sized and selected for
insulation class per NEC and other local codes. The recommended control circuit wire (24VAC) size is
16AWG for lengths up to 150ft. (45m). Contact the factory for assistance with longer wiring runs.
Control Wire Run, ft
(m)
Drycooler Types With Pump Controls
DSF
DDF
DSO
DDO
Number of Fans
Number of Fans
1
1
1
2
3
4
6
8
1
2
3
4
6
8
0-25 (0-7.6)
16
16
16
16
16
16
16
16
16
16
16
16
16
16
26-50 (7.9-15.2)
16
16
16
16
16
16
16
14
16
14
14
14
14
14
51-75 (15.5-22.8)
16
16
16
16
16
16
14
14
14
14
14
12
14
14
76-100 (23.2-30.4)
16
16
16
16
16
16
12
12
12
12
12
12
12
12
101-125 (30.8-38.1)
16
14
16
16
14
14
12
12
12
10
10
10
10
10
126-150 (38.4-45.7)
16
14
16
14
14
14
10
12
10
10
10
10
10
10
Table 6.17 Minimum recommended control circuit wire size, AWG, 60 Hz models
Vertiv
| Liebert® Xtreme Density™ System Design Manual |
143
Summary of Contents for Liebert XD Series
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