Fluid Piping For Air-Cooled, Water/Glycol-Cooled And Chilled-Water Piping Applications; Field-Installed, Gravity-Fed Drain Line Requirements - Liebert PX018 Installer's/User's Manual

Table 5.2 Piping Connection Drawings (continued)
Document Number
DPN002939
DPN002943
DPN003521
DPN002941
5.1 Fluid Piping for Air-cooled,
Water/Glycol-cooled and Chilled-water Piping Applications
The following pipe connections are required:
• A drain line from the evaporator coil drain pan.
• A drain line from the secondary drain pan (if applicable).
• A water-supply line to the optional humidifier (if applicable).
• On air-cooled systems: refrigerant piping connections between the Liebert PDX and the
condenser. See
• On chilled-water systems: connections to the building chilled-water source.
• On water-glycol systems: connections to a water or glycol loop.

5.1.1 Field-installed, Gravity-fed Drain Line Requirements

NOTICE
Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment
and building damage.
Do not install an external trap in the drain line. This line already has a factory-installed trap
inside the cabinet. Installation of a second trap will prevent drain-water flow and will cause the
water to overflow the drain pan.
This line may contain boiling water. Use copper or other material that is rated for handling
boiling water for the drain line. Sagging condensate drain lines may inadvertently create an
external trap.
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |
Title
Air Cooled Models
Water/Glycol Models
GLYCOOL™ Models
Chilled Water Models
Refrigerant Piping and Charging on page 34.
30