Mechanical Installation
Vertiv | Liebert CRD10 | User Manual 40
6. Table 3-6 provides a details of piping connection of water drainage pipe with condensate pump.
Table 3-6 Standards for Water Drainage Pipe and Condensate Pump
The outer diameter of the copper pipe is 12.7mm/0.5”, the internal diameter of the rubber drain hose of
condensate gravity and pump are 16mm/0.6”and 9mm/0.35” respectively. However, the rubber hose is
equipped with threaded joint which has the same interface diameter 12.7mm/0.5”. If using condensate gravity
rather than pump, the rubber drain hose of the water tray should pass through the drainage hole of the tray
and connect to the outer drainage pipe. The ‘Trap’ is essential to drain the condensate water.
NOTES: The following points are to be taken into consideration about the trap:
• Adopt a galvanized steel, PVC, or polyethylene pipe with a fair amount of flexibility.
• Allow a tilt of 2° towards the direction of the drainage flow.
The trap is mandatory and should be located 300mm (11.8”) below the water tray. The trap must be kept
under the raised floor as shown in Figure 3-15.
Figure 3-15 Process of Draining the Condensate Water
NOTES:
• Don’t cut off the brackets of the trap lest affecting the drainage.
• Filling the trap with water to avoid blowing water before the unit is powered on.
• Use a Teflon tape between the flexible pipes and connector to avoid water leakage.
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