User manual

Cooling Configurations

Liebert

™

2.0 COOLING CONFIGURATIONS

NOTE

All field-installed piping must comply with applicable local, state and federal codes.

AIR-COOLED

Air-cooled unit piping is spun closed from the

factory and contains a nitrogen holding charge.

Each installation requires field-supplied

refrigerant piping to a condenser.

GLYCOL-COOLED

Glycol-cooled units are factory-charged and

tested. Field-supplied and field-installed piping is

required from the unit to the drycooler and pump

package

WATER-COOLED

Water-cooled units are factory-charged and

tested. Field-supplied and field-installed

water piping is required from the unit to the

cooling tower.

GLYCOOL-INTEGRATED FLUID ECONOMIZER

GLYCOOL units are factory-charged and tested. Field-supplied

and field-installed piping is required from the unit to the

drycooler and pump package. An additional Liebert Economizer

coil is included for use when fluid temperatures are sufficiently

low (below room temperature). Economizer cooling is provided

by circulating cold glycol through this second coil, reducing or

eliminating compressor operation.

DUAL-COOL

This system has all of the features of a compressorized

system, but adds a second cooling coil that is connected

to a source of chilled water. Cooling is provided by

circulating chilled water, when available, through this

second coil and reducing compressor operation.