Liebert XDC European Union Fluorinated Greenhouse Gas Requirements, Recommended Pipe Size

Piping and Filling with Refrigerant: R-134a and R-407c Circuits

2.0PIPING AND FILLING WITH REFRIGERANT: R-134A AND R-407C CIRCUITS

2.1European Union Fluorinated Greenhouse Gas Requirements

Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection sys- tems in the European Community market and operating with fluorinated greenhouse gases (f-gas), such as R407C, R134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas). The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmo- sphere.

The F-Gas Regulation requires operators to use use all measures that are technically feasible and do not entail disproportionate cost to prevent leakage of these gases, to test for leakage regularly and to recover f-gas before disposing of equipment, as well as during service and maintenance.

Refer to the full regulation for additional details.

2.2Recommended Pipe Size

NOTE

Follow all local codes on maximum length and size of refrigerant lines.

Connect the main pipes between the Liebert XDC and the Liebert XD cooling modules according to site specific documentation and the configuration guide for the Liebert XD system.

Elbows and restrictions shall be minimized for proper operation.

Table 4	Supply, return pipe sizes for Liebert XD refrigerant loop
	Pipe Function	Size/Equivalent Pipe Length
Liebert XDC supply line, from Liebert XDC		1-1/8" OD (1.025" ID) for lengths up to 60 feet
supply to farthest Liebert XD cooling module		1-3/8" OD (1.265" ID) for lengths over 60 but less than 175 feet
Liebert XDC return line, from farthest cooling		2-1/8" OD (1.985" ID) for lengths up to 60 feet
module to Liebert XDC return		2-5/8" OD (2.465" ID) for lengths over 60 but less than 175 feet
From any model Liebert XDO/Liebert XDH		1/2" OD (0.430" ID) for lengths up to 10 feet
supply to supply line of Liebert XDC		7/8" OD (0.785" ID) for lengths over 10 but less than 25 feet
From any model Liebert XDO/Liebert XDH		7/8" OD (0.785" ID) for lengths up to 10 feet
return to return line of Liebert XDC		1-1/8" OD (1.025" ID) for lengths over 10 but less than 25 feet
From any model Liebert XDV/Liebert XDCF		1/2" OD (0.430" ID) for lengths up to 10 feet
supply to supply line of Liebert XDC		5/8" OD (0.545" ID) for lengths over 10 but less than 35
From any model Liebert XDV/Liebert XDCF		5/8" OD (0.545" ID) for lengths up to 10 feet
return to return line of Liebert XDC		7/8" OD (0.785" ID) for lengths over 10 but less than 35 feet

2.3Liebert XDC Interconnection With Liebert XD Cooling Module

All piping must be ASTM (American Society for Testing and Materials) Type “L” copper pipe.

The Liebert XDC may be connected to Liebert XD cooling modules with either Liebert’s XD prefabri- cated piping assembly or with rigid, off-the-shelf piping. In either setup, piping for the Liebert XD system is arranged in a manner similar to piping for a chilled water system. Liebert XD cooling mod- ules are connected in parallel between main return and supply pipes going to and from the Liebert XDP/Liebert XDC. Figure 19 represents a typical configuration. For piping details, refer to Liebert’s XD System Design Manual, SL-16655. The guidelines provided for pipe size must be strictly followed. Failure to size the main lines and connection lines adequately may result in reduced cooling capacity. The critical aspects of pipe sizing are related to coolant volume and pres- sure drop. Both must be minimized.

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