16 Chapter 2 Mechanical Installation
Liebert CRV+ Series Air Conditioner User Manual
Water inlet
soft pipe
Water inlet
hole
Top water inlet
copper pipe
Figure 2-18 Connection of bottom water inlet pipe of electrode humidifier
Connecting connection copper pipes (discharge pipe and liquid pipe) between indoor unit and outdoor unit
The indoor unit and outdoor unit are connected through welded copper pipes. The unit has refrigerating pipe
connectors and labels on its top and bottom, as shown in Figure 2-19 and Figure 2-20. During welding, follow the
label indication to connect the discharge pipe and the liquid pipe of indoor unit, and do not have the labels burned.
Note
1. For bottom piping, before welding the discharge pipe of compressor, follow the requirement labeled on the copper pipe, use a
cutter to cut off the copper pipe (a small quantity of compressor lubricating oil may leak), and do not weld the copper cap on the
seal directly lest the oil in the copper pipe should be heated and catch fire.
2. The exposure time of system pipes should not exceed 15min. Over long time will lead to the POE refrigeration oil being
affected with damp. That can affect the life of the key components and the stability of the system operation.
Horizontal sections of the discharge pipes should be sloped downward from the compressor, with a slope of at least
1:200 (5mm down for each 1m run). The discharge pipes should be heat insulated where they are routed in the
conditioned space (under the raised floor included).
Drain hole
Water inlet hole
Liquid pipe hole
Discharge pipe hole
Figure 2-19 Top pipe connectors
Drain hole
Cable entry hole
Liquid pipe hole
Discharge pipe hole
Figure 2-20 Bottom pipe connectors
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