Unit installation

Piping
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6.0 PIPING
All fluid and refrigeration connections to the unit, with the exception of the condensate drain, are
sweat copper. Factory-installed piping brackets must not be removed. Field-installed piping must be
installed in accordance with local codes and must be properly assembled, supported, isolated and
insulated. Avoid piping runs through noise-sensitive areas, such as office walls and conference rooms.
Refer to specific text and detailed diagrams in this manual for other unit-specific piping require-
ments.
All piping below the elevated floor must be arranged so that it offers the least resistance to airflow.
Careful planning of the piping layout under the raised floor is required to prevent the airflow from
being blocked. When installing piping on the subfloor, Emerson recommends installing the pipes in a
horizontal plane rather than stacked one above the other. Whenever possible, the pipes should be run
parallel to the airflow.
6.1 Fluid Connections
NOTICE
Risk of water leakage. Can cause severe property damage and loss of critical data center
equipment.
This unit requires a water drain connection. It may require an external water supply to
operate the humidifier. Improper installation, application and service practices can result in
water leakage from the unit.
Do not locate the Liebert CRV directly above any equipment that could sustain water damage.
Emerson recommends installing leak detection equipment for the unit and supply lines.
6.1.1 Condensate Piping—Field-Installed
• Do not reduce drain lines
• Do not expose drain line to freezing temperatures
• Drain line may contain boiling water. Use copper or other suitable material
• Drain line must comply with local building codes
• Emerson recommends installing under-floor leak detection equipment
Gravity Drain—Units Without Factory-Installed Condensate Pump
• 3/4" FPT drain connection is provided on units without optional factory-installed condensate
pump with infrared humidifier or no humidifier; 1-1/4" FPT connection is provided on units with
steam generating humidifier
• Pitch the drain line toward the drain a minimum of 1/8" (3mm) per 1 foot (305mm) of length
• Drain is trapped internally. Do not trap the drain external to equipment
• Drain line must be sized for 2 gpm (7.6 l/m) flow
NOTICE
Risk of improper piping connections. Can cause damage to the equipment and to the building.
The drain line must not be trapped outside the unit or water may back up in the drain pan.