Pre-Installation Guidelines

3.0PRE-INSTALLATION GUIDELINES

3.1Room Preparation

Verify that the floor is level, solid and sufficient to support the unit. See Table 2 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 Liebert DS units 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 Figures 6 through 21 for dimensions.

Emerson recommends installing an under-floor water detection system. Contact your local Emer- son representative for information.

3.2Air Distribution—Downflow Units

Verify that the raised floor has been properly sized for the unit’s airflow and the room is free of airflow restrictions.

Perforated floor tiles in the raised floor should ensure minimal pressure loss.

The raised floor must provide 7-1/2" (191mm) of clearance.

Ensure that there is adequate clearance above the unit for service, such as replacing filters.

Optional plenums are available for downflow unit ducting.

Figure 4 Downflow unit ducting and plenum ducting

Field-Fabricated

Ductwork

 

Field Service Access

 

 

for filter replacement

 

 

(minimum height of

Field-Fabricated

Provided Condenser

12" [305mm]; minimum

Ductwork

Access (water, glycol

distance from unit,

 

and GLYCOOL

2" [51mm])

 

units only)

 

 

 

 

Provided Service

 

 

Access Door for

 

 

filter replacement

 

Optional

 

DIRECT UNIT DUCTING

Liebert

 

 

Plenum

 

Provided Condenser

 

Access (water, glycol

 

and GLYCOOL units only)

 

Liebert Plenum - Refer to plenum

 

installation sheet 186582P1

PLENUM DUCTING

included in the plenum package.

 

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Liebert DS user manual Room Preparation, Air Distribution-Downflow Units, PRE-INSTALLATION Guidelines