Emerson Xtreme Density manual Liebert XDO spacing-horizontal and vertical

Designing a Liebert XD Solution

3.6.2Determining Vertical Placement of Liebert XDOs Above the Cold Aisle

In the maximum density configuration, Emerson recommends placing the Liebert XDOs between 18 and 24 inches (457-609mm) above the equipment cabinets. In some cases where the required density is less, the front-to-rear spacing of Liebert XDOs in a row will be increased. To ensure coverage of the wider spaces between the Liebert XDO units, the vertical distance between the cabinets and the Lie- bert XDOs should be increased. However, the recommended maximum height of the Liebert XDO above the cabinets is 30 inches (762mm). See Figures 15.

Figure 15 Liebert XDO spacing—horizontal and vertical

Pairs of XDO modules

above critical equipment

Front-to-rear spacing of pairs of XDO modules

	XDO height above
	equipment to be cooled
		Liebert recom-
		mends install-
		ing one Liebert
		XDO at the end
		of each aisle
		being cooled
		and to space
		the remainder
		between these
		“end units” in
		pairs. This lay-
		out will block
		the incursion of
		hot air around
Heat-Generating Critical Equipment
		the side of the
		end cabinets.

16