Pre-Installation Guidelines; Room Preparation; Air Distribution-Downflow Units; Figure 4 Downflow Unit Ducting And Plenum Ducting - Emerson Liebert DS Series User Manual

3.0 P -I
RE NSTALLATION
3.1

Room 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
Emerson representative for information.
3.2 Air 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
Provided Condenser
Access (water, glycol
and GLYCOOL
units only)
DIRECT UNIT DUCTING
G
UIDELINES
Field-Fabricated
Ductwork
Field Service Access
for filter replacement
(minimum height of
12" [305mm]; minimum
distance from unit,
2" [51mm])
Optional
Liebert
Plenum
Provided Condenser
Access (water, glycol
and GLYCOOL units only)
Liebert Plenum - Refer to plenum
installation sheet 186582P1
included in the plenum package.
PLENUM DUCTING
7

Pre-Installation Guidelines

Field-Fabricated
Ductwork
Provided Service
Access Door for
filter replacement