Liebert DS user manual Air Distribution-Upflow Units, Upflow ducting configurations

Pre-Installation Guidelines

3.3Air Distribution—Upflow Units

Various configurations are available:

•Front return

•Rear return

•Top-front supply

•Top-rear supply

For in-room applications with supply and return grilles, several feet of clearance must be maintained at the intake and discharge of the unit.

Upflow rear-return configurations use a filter box attached to the back of the Liebert DS. Allow 25" (635 mm) on one side of the unit for access to the rear return filter box. Refer to the rear return instal- lation sheet, 187230P1, inside the rear return filter box package.

! WARNING

Risk of high-speed moving parts. Can cause injury or death.

Disconnect all local and remote electric power supplies before working in the unit.

Do not operate upflow units without installing a plenum, ductwork or guard over the blower opening(s) on the top surface of the unit cabinet.

Ductwork must be connected to the blower(s), or a plenum must be installed on the blower deck for protection from rotating blower wheel(s) on upflow units.

Figure 5 Upflow ducting configurations

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1Straight section of duct off of unit to be 1.5 to 2.5 times the longest blower dimension.

2Typical ducting shown; ducting may run to either side.

*Follow standard practices on all duct work.

NOTE

DPN001156 Rev. 0

Drain traps are qualified to a return duct static of negative 1.5 i.w.g. (-1.5 i.w.g).

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