Overriding Fluid Economizer Operation; Setting Up Fluid Economizer Operation - Vertiv Liebert iCOM DP400/500 Installer/User Manual

7.1.2 Overriding Fluid Economizer Operation

Overrides the economizer's settings with those of the cooling unit.
1. Touch
2. Select the override settings and touch Save.
Fluid Economizer Override Options
Enable Fluid Economizer
Enables/disables economizer operation.
Lockout FC at FC Fluid below
When enabled, prevents frost on free cooling pipes by disabling the free-cooling unit when the FC Fluid Temperature
falls below the specified limit. The default setting is 32°F
Stop FC at Setpoint + Value
Temperature at which free cooling is locked out.

7.1.3 Setting Up Fluid Economizer Operation

Configures activation points of the economizer. The sensors used to control/activate secondary cooling are room/local air
temperature sensor or return air sensor and an Aquastat Sensor (AQ) that measures the glycol/chilled water temperature.
1. Touch
Indicator dots next to the parameters show the status of the property. Table 7.1 below, describes the color
dots that indicate whether or not DT Between Room and Fluid Value (depending on the selection for DT
Between Room and Fluid Value) is within range for economizer operation. Indicators must be green to condition
the space using the economizer. If an indicator is yellow, the economizer will not condition the space.
2. Refer to the
Economizer
72
, then > Economizer > Override. The OVERRIDE panel opens.
, then > Economizer > Setup. The SETUP panel opens.
Fluid Economizer Set Up Options
on page 74, to adjust the setpoint options, then touch Save.
Table 7.1 Economizer Property Status Indicators
Indicator color Definition
Green The air or fluid meets the requirements for use.
Yellow The air or fluid does not meet requirements and is ineligible for use.
on the facing page, and Temperature Control with a Fluid
Vertiv™ | Liebert® iCOM™ Installer/User Guide