Vertiv Liebert CRV - Field-Installed, Gravity-Fed Drain Line Requirements

6.3.7 Field-installed, Gravity-fed Drain Line Requirements
Units without the optional, factory-installed condensate pump include an FPT drain connection that is
sized based on your unit's model and humidifier options.
• A 3/4-in. FPT connection is provided on models with an infrared humidifier and on models no
humidifier.
• A 1/4-in. FPT connections is provided on models with a steam-generating humidifier.
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 (Except for 300-mm (12-in.) Chilled-water models).
This line may contain boiling water. Use copper or other suitable material for the drain line.
Sagging condensate drain lines may inadvertently create an external trap.
Observe the following requirements when installing and routing the drain line:
• Drain line must be sized for 2 gpm (7.6 l/m) flow.
• The drain line must be located so it will not be exposed to freezing temperatures.
• The drain should be the full size of the drain connection.
• The drain line must slope continuously away from the unit. Pitch drain line toward drain a
minimum of 1/8in. (3mm) per 1ft (305mm) of length.
• Drain is trapped internally. Do not externally-trap the drain line.
• The drain line must be rigid enough that it does not sag between supports, which
unintentionally creates traps.
• Use copper or other material suitable for draining water that can reach temperatures up to
212°F (100°C).
• When the evaporator is installed below the level of the gravity-fed drain line, the optional
condensate pump is required. Refer to the appropriate section that follows, depending on the
configuration of your unit. See Condensate-pump Drain Line Requirements on page60.
Refer to the additional details and specific installation instructions depending on the configuration of
your unit:
• Connecting Gravity-drain Line on All600-mm(24-in.) models
andonAir-andWater/Glycol-cooled, 300 mm (12 in.)models on the next page
• Connecting Gravity-drain Line onWater/Glycol-cooled,300-mm(12-in.)Models on page70
• Connecting Gravity-drain Line onChilled-water,300-mm(12-in.)Models on page71
Vertiv | Liebert CRV Installer/User Guide | 67