Vertiv Liebert CR045 - Page 36

Vertiv | Liebert® CRV4 | User Manual 25
Mechanical Installation
4. Then connect the drain pipe at the drainage hole located on the top of the cabinet (pipe connector has been
installed, 1/2”-BSP) as shown in Figure 3-6.
5. Regardless the water is drained from the upper or the lower parts of the unit through water pump, the check
valve must be installed at the exit of the unit.
The outer diameter of the copper pipe is 12.7 mm and an internal diameter of the hose pipe is 9 mm. However,
if the unit is not congured with the pump, the drainage pipe of the water pan should go through the
drainage hole of the pan and must connect to the outer drainage pipe. The water-trap is essential to drain the
condensate water.
The following points are to be taken into consideration about the water-trap:
• Adopt a galvanized steel, PVC, or polyethylene pipe with a fair amount of exibility.
• Allow a slope of 2% towards the direction of the drainage ow
No. Description No. Description
1 Weight-drain water hole 7 Weight-drain water hole
2 Liquid inlet hole of evaporator 8 Bottom cable inlet hole
3 Exhaust air hole of compressor 9 Exhaust air hole of compressor
4 Drain water hole of pump 10 Liquid inlet hole of evaporator
5 Bottom cable inlet of pump 11 Water inlet hole of wet lm humidier
6 Drain water hole of pump
Figure 3-13 Connection of the Drain Piping