
Piping
5.4.2Brazing Preparations
After the holding charge has been vented, a torch can be used to remove the caps over the ends of the supply and return lines.
The assembly and connection means used for piping in the Liebert XD system are similar to those used for conventional refrigeration systems. All piping should be installed with
During brazing, the lines must be filled with flowing dry nitrogen to prevent excessive oxidation and scale formation inside the piping. Prevailing good refrigeration practices must be employed for piping supports, leak testing, dehydration and charging. Failure to use good system practices may result in damage to the system. Refer to the ASHRAE refrigeration handbook for general
5.5Connection Methods for Hard Pipe
The assembly and connection means used for piping in the Liebert XD system are the same as those used in conventional refrigeration systems. Observe all standard practices during installation and startup to prevent damage and contamination.
5.6Recommended Piping Size
Connect the main pipes between the Liebert XDH branch piping and the Liebert XDP or Liebert XDC according to Table 2. Elbows and restrictions must be minimized to ensure good fluid flow.
Please see Table 2 below for recommended pipe sizes and Figure 3 for piping segment locations.
Table 2 Branch piping sizes for pumped refrigerant loop
Pipe Function | Size / Equivalent Pipe Length |
From Liebert XDH supply to supply line of | 1/2" OD (0.430" ID) for lengths up to 10 feet (3m) |
Liebert XDP/Liebert XDC | 7/8" OD(0.545" ID) for lengths over 10 feet but less than 25 feet |
From Liebert XDH return to return line of | 7/8" OD(0.545" ID) for lengths up to 10 feet (3m) |
Liebert XDP/Liebert XDC |
NOTE
To minimize the amount of pumped refrigerant required, do NOT oversize the piping.
5.6.1Connecting Methods—One-Shot Connections
CAUTION
! Risk of sudden refrigerant discharge. Can cause loss of charge and minor injury.
If the optional precharged option is chosen, the Liebert XDH is shipped with a full charge of
Supply and return fittings on the precharged Liebert XDH units are
The assembly and connection means used for piping in the Liebert XD system are the same as those used in conventional refrigeration systems. Observe all standard practices during installation and startup to prevent damage and contamination.
Both supply and return fittings may be supplied with optional,
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