Vertiv Liebert XDH, Руководство пользователя

Страница: 34 / 84

Vertiv | Liebert XDH | User Manual 24
Mechanical Installation (Site Preparation)
3.4.3.Brass Connection Between XDP and XDH Units
Pipes that need to be connected on site include liquid refrigerant pipe and gaseous refrigerant pipe from XDHs
to XDP, followed with the connection of condensate water piping of the XDH.
• All cooling pipe joints shall be soldered by silver brazing.
• Pipe selection, arrangement and fixing, system vacuum and refrigerant filling must be operated according
to industry standards.
• Design and construction must take into account the distance between the host and the end, reduced pipe
pressure, reduced noise and vibration.
As shown in Figure 3-2 and Figure 3-3 , the XDP and XDH are connected through the main liquid refrigerant
piping and main gaseous refrigerant piping to the liquid refrigerant dis-tributary piping and gaseous refrigerant
dis-tributary piping for each XDH unit respectively. Table 3-3 provides the pipe diameters for the liquid
refrigerant line, gaseous refrigerant line and the condensate drain line.
Connect the pipes firmly based on the recommended pipe diameters or contact Vertiv local representative for
confirmation. Both liquid refrigerant main piping and dis-tributary piping of the XDH need a switch type ball
valves for isolating each XDP from the refrigerant lines during its maintenance. The switch ball valves need to
be installed at site. The connection length of the main refrigerant pipe is according to the distance between the
XDP and the furthest XDH. And the connection length of the dis-tributary refrigerant pipe can be determined as
the distance between any XDH and the XDP.
Table 3-3 Recommended Pre-designed Pipe Diameter to Connect XDP and XDH
Refrigerant Piping
Connection Length Pipe Diameter
(m) mm inch
Main gaseous refrigerant pipe
0< L ≤10 42 1.7”
10< L ≤20 45 1.8”
20 < L <60 54/ 2.1”
Main liquid refrigerant pipe
0< L ≤10 22 0.9”
10< L ≤20 25 1.0”
20< L ≤40 28 1.1”
40< L <60 32 1.3”
Gaseous refrigerant
dis-tributary pipe
1< L ≤5 25 1.0”
5< L ≤10 28 1.1”
Liquid refrigerant
dis-tributary pipe
1< L ≤5 16 0.6”
5< L ≤10 19 0.7”