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LIEBERT DRYCOOLERS
Liebert drycoolers are designed to be used in conjunction with water cooled refrigeration and air conditioning
machines as well as a variety of commercial and industrial applications requiring the rejection of heat from
machinery or processes via a cooling fluid. During periods of low ambient temperatures, drycoolers may assist
or replace the capacity requirements of mechanical chillers for a “free cooling” effect.
Liebert offers a full range of control options as well as expansion tank and pump packages. For cooling fluids
other than water or water/glycol mixtures, contact Liebert, Heat Transfer.
Figure 1 Drycooler model numbers
DDN C1 0 9Y
Optional
Disconnect
(DNC, DNL,
& DNT only)
Drycooler
Control Code:
C = No Control
L = Main Control
T = Fan Cycling
O = Fan Cycling &
Pump Control
S = Special
Model Size
Letter Code for Voltage,
Phase and Frequency:
Y = 208/230-3-60
A = 460-3-60
B = 575-3-60
P = 208/230-1-60
Z = 460-1-60
V = 575-1-60
N = 200/230-3-50
M = 380/415-3-50
W = 200/230-1-50
N = Single Circuit
(No Pump)
S = Single Circuit
(With Pump)
D = Single Circuit
(Dual Pumps)
D
Optional
Circuiting
(see Table 4)