3 PRE-INSTALLATION PREPARATIONANDGUIDELINES
NOTE: Before installing unit, determine whether any building alterations are required to run piping, wiring and duct
work. Follow all unit dimensional drawings and refer to the submittal engineering dimensional drawings of individual
units for proper clearances.
Refer to DSE Model Number Digit Definitions, and submittal drawings to determine the type of system being installed and
anticipate building alterations, piping and duct work needed.
The unit dimensions, pipe connection locations, and piping schematics are described in the submittal documents included
in the Submittal Drawings.
• Verify that the floor is level, solid and sufficient to support the unit. See Shipping Dimensions and Unit Weights
on the next page for unit weights.
• Confirm that the room is properly insulated and has a sealed vapor barrier.
• For proper humidity control, keep outside or fresh air to an absolute minimum (less than 5% of total air
circulated in the room).
• Do not install a Liebert® DSE in an alcove or at the end of a long, narrow room.
• Install the units as close as possible to the largest heat load.
• Allow at least the minimum recommended clearances for maintenance and service. See the appropriate
submittal drawings for dimensions.
We recommend installing an under floor water detection system. Contact your Vertiv representative for information.
3.1 Planning Dimensions
The unit, floor stand, and plenum dimensions are described in the submittal documents included in the Submittal Drawings.
The following table lists the relevant documents by number and title.
Document Number Title
Downflow Units
DPN004366 Liebert® DSE Cabinet Dimensional Data DA250, DA265 with Horizontal Discharge
DPN004516 Liebert® DSE Cabinet Dimensional Data DA250, DA265 with Bottom Discharge
DPN004514 Liebert® DSE Installation and Service Clearance Data DA250, DA265
DPN004581 Liebert® DSE Floor Planning for Adjacent DA250, DA265 Units
Floor Stands
DPN004511 Liebert® DSE Floor Stand Dimensional Data DA250, DA265
Table 3.1 Dimension Planning Drawings
3 Pre-installation PreparationandGuidelines
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