Vertiv Liebert PFD, Installer/User Manual

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3 PRE-INSTALLATION PREPARATION AND GUIDELINES
NOTE: Before installing unit, determine whether any building alterations are required to run piping,
wiring and ductwork. Follow all unit dimensional drawings and refer to the submittal engineering
dimensional drawings of individual units for proper clearances.
Refer to PFD Model Number Nomenclature on page 7, and submittal drawings to determine the type of
system being installed and anticipate building alterations, piping and ductwork needed.
The unit dimensions, pipe-connection locations, and piping schematics are described in the submittal
documents included in the Submittal Drawings on page 35.
• Allow at least the minimum recommended clearances maintenance, and service. See the
appropriate submittal drawings for dimensions.
• Be mindful of the placement of the PFD in relation to the connected evaporator unit, other
outside units, barriers, and walls for air flow clearance, equivalent piping distances, and
differences in elevation between the PFD and connected evaporator unit.
• When applications do not meet or exceed any of these specifications, contact your Vertiv
representative.
3.1 Planning Dimensions
The unit dimensions described in the submittal documents included in the Submittal Drawings on
page 35.
The following table lists the relevant documents by number and title.
Document Number Title
Outdoor Condensing Unit
DPN004058 Cabinet dimensions, 5-ton, top discharge
DPN004063 Cabinet dimensions, 3-, 4-, and 5-ton, horizontal discharge
DPN004066 Optional anchoring plan, 3-, 4-, and 5-ton, horizontal discharge
Table 3.1 Dimension Planning Drawings
3.1.1 Location Considerations for Outdoor Condensing Unit
Observe the following when planning the installation of the outdoor unit:
• To ensure a satisfactory air supply, locate air-cooled condensing units in an environment with
clear air, away from loose dirt and foreign matter that may clog the coil.
• Condensing units must not be located in the vicinity of steam, hot air or fume exhausts or
closer than 18 inches from a wall, obstruction or adjacent unit.
• For multiple-unit installations, space the units so that the hot, condensing-unit exhaust air is
not directed toward the air inlet of an adjacent unit.
• Avoid areas where heavy snow will accumulate at air inlet and discharge locations.
• The condensing unit should be located for maximum security and maintenance accessibility.
Avoid ground-level sites with public access. Install a solid base, capable of supporting the
weight of the condensing unit.
• The base should be at least 2 in. (51 mm) higher than the surrounding grade and 2 in. (51 mm)
larger than the dimensions of the condensing-unit base. For snowy areas, a base of sufficient
height to clear snow accumulation must be installed.
Before beginning, refer to Piping and Refrigerant Requirements on page 11 for unit placement, piping
guidelines, and refrigerant-charge requirements for your system.
The condensing unit must be located within the maximum distance from evaporator per the guidelines
listed in Pipe length and condenser elevation relative to evaporator .
3 Pre-installation Preparation and Guidelines 9