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Liebert Condensers And Drycoolers

All Components From

One Manufacturer

Emerson Network Power is the only

manufacturer in the computer support

industry that builds its own condensers and

drycoolers. Liebert condensers and drycoolers

feature aluminum cabinets and copper-tube,

aluminum-ﬁn coils, and are built to precisely

match the heat rejection requirements of the

Liebert Challenger 3000.

Wide range of heat rejection solutions—

vertical or horizontal airﬂows, indoor or

outdoor models, freestanding or ducted

conﬁgurations.

Standard units—Sized for maximum

outdoor ambient temperatures of 85 °F

(29.4°C) to 105°F (40.6°C).

Liebert VFD Control Condenser—Features

a variable frequency drive (VFD) and an

inverter duty fan motor with ceramic

bearings. The VFD control uses pressure

transducers to modulate the condenser

fan motor speed to hold condensing

temperatures constant. This system allows

for operation at ambient temperatures as

low as -20°F (-28.9°C).

Fan Speed Control Condenser—A fan-

speed control varies the variable speed

fan motor based on compressor head

pressure to maintain constant condensing

temperatures. This system allows for

operation at ambient temperatures as low

as -20°F (-28.9°C).

Lee-Temp Condenser—The Lee-Temp

winter control system’s heated receivers

permit startup and positive head pressure

control at ambient temperatures as low as

-30°F (-34.4°C).

Drycoolers, Pumps, Tanks and Controls—

Complete heat rejection solutions for

glycol-cooled and GLYCOOL units consist of

drycoolers, glycol pumps, expansion tanks

and integral or separate pump electrical

control boxes.

Quiet-Line

™

Condenser/Drycooler—

Operate with the lowest noise level of any

heat rejection available, offering levels of

less than 57 dBA.

Indoor Piggyback Condenser/Drycooler—

Indoor condensers/drycoolers designed to

provide heat rejection by ducting air from

outside the building, such as

high-rise buildings.

High Ambient Condensers—Utilize

increased coil surfaces for operation in

outdoor climates up to 120 °F (48.9 °C).

Prop Fan Condensing Units for Air Cooled

split systems — operate with quiet, high

efﬁciency scroll compressor. The units run

efﬁciently even at partial load conditions.

Fully wired, piped and tested. Outdoor

mounting. Allows operation down to

ambient temperatures as low as

-30°F (-34.4°C).

Centrifugal Fan Condensing Units for

Air Cooled split systems —operate with

quiet, high efﬁciency scroll compressor.

The units run efﬁciently even at partial load

conditions. Fully wired, piped and tested.

Indoor mounting.

Water/Glycol Condensing Units for

Water/Glycol Cooled split systems—

operate with quiet, high efﬁciency scroll

compressor. The units run efﬁciently even

at partial load conditions. Fully wired, piped

and tested. Indoor mounting.

For Ultimate

Energy Efﬁciency:

GLYCOOL™

The GLYCOOL system is a patented

Liebert ﬂuid economizer that allows

colder outdoor temperatures to reduce

or eliminate compressor operation,

without the risk of outside pollutants or

contaminants. This reduces operating

costs and increases reliability.

When outdoor temperatures

are above room temperature,

the GLYCOOL Liebert Challenger

functions as a normally glycol-

cooled system. But when outdoor

temperatures fall below room

temperatures, the glycol that

circulates between the condenser

and drycooler becomes cold

enough to provide some or all

of the room’s cooling needs.

The cold glycol is redirected to a

supplemental cooling coil by means

of a microprocessor-controlled

valve, providing the same cooling

capacity as the mechanical

refrigeration system.

Liebert

drycooler

Glycol-cooled

condensers

Compressor

Glycol

circulating

pump

Integrated

Glycool coil

A-frame coil

1 2 3 4 5 6 7 8 9 10 11 12

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