Configuring Economizer Operation; Fluid Economizers; Fluid Economizer Control Options - Vertiv Liebert iCOM DP400/500 Installer/User Manual

7 CONFIGURING ECONOMIZER OPERATION

NOTE: Your Liebert® DSE™ Packaged Solution does not offer humidification or dehumidification functions. Please
disregard those settings/fields when mentioned in this guide or displayed on the iCOM controller.
Use iCOM to configure the economizer installed on your cooling unit.
NOTE: Depending on customization to your cooling system, one of two types of economizer may be installed, Liebert®
Fluid Economizer or Liebert® Air Economizer. Menu options differ depending on the type of economizer installed and
significant differences are noted when they occur.

7.1 Fluid Economizers

Fluid economizers provide a secondary chilled water or glycol coil (Liebert® Econ-O-Coil™) for cooling. Economizer
operation is commonly referred-to as free cooling because it reduces or eliminates the use of the compressor(s) in the right
environmental conditions.
Your system may have one of two kinds of fluid economizers:
• GLYCOOL™ Economizer: a two pipe system that feeds a second glycol coil in the cooling unit and also the
compressor(s) and heat exchanger (Liebert Paradenser™, tube-in-tube condenser, or brazed plate heat
exchanger).
• Dual-Cool Economizer: A two pipe or four pipe system.
• A two pipe system provides chilled water to a second coil, bypassing the air cooled/condenser
compressorized loop.
• In a four pipe system, two fluid lines are dedicated to a second chilled-water coil and two fluid lines are
dedicated to a glycol cooled or chilled water cooled compressorized loop.
The Fluid Economizer option appears on the iCOM Service menu and opens the FLUID ECONOMIZER panel to configure
operation.
7.1.1 Fluid Economizer Control Options
Override
Configures cooling unit override of economizer operation. See
page.
Setup
Configures the activation setpoints of the economizer. See
Status
Status of economizer properties. See
7 Configuring Economizer Operation
Overriding Fluid Economizer Operation
Setting Up Fluid Economizer Operation
Viewing Fluid Economizer Statuses
on the next
on the next page.
on page 77.
71