Liebert XDV manual Recommended Piping Size, Brazing Preparations-Hard-Piped Units

Piping

Figure 25 Schrader valve location for venting holding charge

Front of Liebert XDV

Top of Liebert XDV

Schrader

Valve

SCHRADER VALVE

SUPPLY( IN)

RETURN (OUT)

Supply pipe	Return pipe
connection		Rear of XDV
(1/2" OD)	connection
	(5/8" OD)

6.4.2Brazing Preparations—Hard-Piped Units

After the holding charge for a hard-piped Liebert XDV has been vented, a torch can be used to remove the caps over the ends of the supply and return lines.

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 good-practice refrig- eration piping.

6.5Recommended Piping Size

NOTICE

To minimize the amount of refrigerant required, do NOT oversize the piping.

Connect the main pipes between the Liebert XDV branch piping and the Liebert XDP or Liebert XDC according to Table 4. Elbows and restrictions must be minimized to ensure good fluid flow.

Please see Table 4 below for recommended pipe sizes and Figure 3 for piping segment locations.

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