Piping
24
3.6.1 Calculating 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 XDP with Liebert XD cooling modules (Liebert XDCF,
Liebert XDH, Liebert XDO and Liebert XDV). The example below combines one Liebert XDP with 20
Liebert XDV8 cooling modules.
Table 9
R-134a refrigerant charge for Flex Pipe connector lines to and from any model
Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF/Liebert XDR
Refrigerant Charge
lb. (kg)
Metal Flex Pipe Connector Length
Supply Line Diameter 1/2"
0.3 lb. (0.14)
4 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
0.5 lb. (0.23)
6 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
0.7 lb. (0.32)
8 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
0.8 lb. (0.36)
10 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply/Liebert XDR
Return Line Diameter 5/8"
0.01 lb. (0.01)
4 ft. Flex Pipe existing Liebert XDV systems
0.02 lb. (0.01)
6 ft. Flex Pipe existing Liebert XDV systems
0.03 lb. (0.01)
8 ft. Flex Pipe existing Liebert XDV systems
0.03 lb. (0.01)
10 ft. Flex Pipe existing Liebert XDV systems
Return Line Diameter 1"
0.13 lb. (0.06)
4 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
0.2 lb. (0.09)
6 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
0.27 lb. (0.12)
8 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
0.33 lb. (0.15)
10 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF/Liebert XDR supply
Table 10
Calculating refrigerant charge—example
Components
Number of Units
or Piping Length, feet
Pounds Per
Component
Total, lb.
Liebert XDP
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
Components
Number of Units
or Piping Length
Pounds Per
Component
Total
Total
Summary of Contents for Liebert XDP
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