5 PIPING AND REFRIGERANT REQUIREMENTS
All fluid and refrigeration connections to the unit, with the exception of the condensate drain, are sweat
copper. Factory-installed piping brackets must not be removed. Field-installed piping must be installed in
accordance with local codes and must be properly assembled, supported, isolated and insulated. Avoid
piping runs through noise-sensitive areas, such as office walls and conference rooms.
Refer to specific text and detailed diagrams in this manual for other unit-specific piping requirements.
All piping below the elevated floor must be located so that it offers the least resistance to air flow. Careful
planning of the piping layout under the raised floor is required to prevent the air flow from being blocked.
When installing piping on the subfloor, we recommend that the pipes be mounted in a horizontal plane
rather than stacked one above the other. Whenever possible, the pipes should be run parallel to the air
flow.
The pipe connection locations, piping general arrangement and schematics are described in the
submittal documents included in the Submittal Drawings on page106.
The following tables list the relevant documents by number and title.
Document Number Title
LiebertPDX Piping Schematics
DPN002929 Air Cooled Models with TXV
DPN003843 Air Cooled Models with EEV
DPN002931 Water/Glycol Models
DPN002932 GLYCOOL™ Models
DPN002972 Econ-O-Coil Models
LiebertPCWPiping Schematics
DPN002930 Chilled Water Models
DPN003737 Hot Water Reheat
Table 5.1 Piping General-arrangment Drawings
Document Number Title
Downflow Model Primary ConnectionLocations
DPN002938 Air Cooled, Raised Floor Models
DPN002945 Air Cooled, Front Discharge Models
DPN002942 Water/Glycol, Raised Floor Models
DPN002947 Water/Glycol, Front Discharge Models
DPN003520 GLYCOOL™ Raised Floor Models
DPN003522 GLYCOOL™ Front Discharge Models
DPN002940 Chilled Water, Raised Floor Models
DPN002946 Chilled Water, Front Discharge Models
Upflow Model Primary Connection Locations
Table 5.2 Piping Connection Drawings
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide | 29
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