Calculating Refrigerant Charge-Example | Liebert XDC specification

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

Table 9 R-134a refrigerant charge for Liebert XD Flex Pipe connector lines to and from any model Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF

Refrigerant Charge, lb. (kg)

Metal Liebert XD Flex Pipe Connector Length

Supply Line Diameter 1/2"

0.3lb. (0.14) 4 ft. Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.5lb. (0.23) 6 ft. Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.7lb. (0.32) 8 ft. Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.8lb. (0.36) 10 ft. Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

Return Line Diameter 5/8"

0.01lb. (0.01) 4 ft. Liebert XD Flex Pipe existing Liebert XDV systems

0.02lb. (0.01) 6 ft. Liebert XD Flex Pipe existing Liebert XDV systems

0.03lb. (0.01) 8 ft. Liebert XD Flex Pipe existing Liebert XDV systems

0.03lb. (0.01) 10 ft. Liebert XD Flex Pipe existing Liebert XDV systems

Return Line Diameter 1"

0.13lb. (0.06) 4 ft Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.2lb. (0.096) 6 ft Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.27lb. (0.126) 8 ft Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.33lb. (0.15) 10 ft Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

2.5.1Calculating Refrigerant Charge—Example

Using Tables 6, 7, 8 and 9, calculate the refrigerant charge of the individual sections of your Liebert XD system. Add the calculated charge amounts to determine the amount of R-134a refrigerant required for one system combining a Liebert XDC with Liebert XD cooling modules (Liebert XD Cool- Frame, Liebert XDH, Liebert XDO and Liebert XDV). The example below combines one Liebert XDC with 20 Liebert XDV8 cooling modules.

Table 10 Calculating refrigerant charge—example

	Number of Units
	or Piping Length,	Pounds
Components	feet	Per Component	Total, lb.
Liebert XDC	1	157	157

Liebert XDV8 Cooling Modules	20	2.32	46.4

Supply Main, 1-1/8"	100	0.45	45

Return Main, 2-1/8"	100	0.28	28

Liebert XDV 1/2" supply Liebert XD Flex Pipes	20	0.8	16

Liebert XDV 5/8" return Liebert XD Flex Pipes	20	0.03	0.6

		Total	293

Table 11 Worksheet to calculate refrigerant charge

	Number of Units	Pounds
Components	or Piping Length	Per Component

Total

Liebert XDC Calculating Refrigerant Charge-Example, Calculating refrigerant charge-example

Models: XDC