Emerson Liebert Xtreme Density Dokumentacja Pobierz pdf (Strona 24)

Designing a Liebert XD Solution

The assembly and connection means used for piping in the XD system are similar to that of conven-

tional refrigeration systems. Brazing material or soft solder may be used. However, if brazing mate-

rial is used, the lines being brazed MUST be pressurized with flowing dry nitrogen during brazing to

prevent excessive oxidation and scale formation inside the piping.

Please see Table 3 below for recommended pipe sizes and Figure 19 for piping segment locations.

For additional information about piping connections, see the unit’s user manual: XDP, 16641;

XDC, SL-16671; XDO, SL-16661; and XDV, SL-16621.

Figure 19 Hydraulic schematic

3.11 Liebert XD Piping Slope

The main supply and return lines to and from the XDP/XDC must be sloped downward toward the

XDP/XDC at a rate of 1" per 20 feet (25mm per 6m) of pipe run. Horizontal connector lines should also

be sloped downward from the cooling modules toward the main supply and return lines.

Table 3 Supply, return pipe sizes—equivalent lengths

Pipe Function

Key to Piping

in Figure 19

Schematic

Size / Pipe Run

(Equivalent Lengths)

XDP/XDC supply line, from XDP/XDC

supply to farthest XDO or XDV

1-1/8" OD for lengths up to 60 feet (18m)

1-3/8" OD for lengths over 60 but less than 175 feet (18-53m)

XDP/XDC return line, from XDP/XDC

return to farthest XDO or XDV

2-1/8" OD for lengths up to 60 feet (18m)

2-5/8" OD for lengths over 60 but less than 175 feet (18-53m)

From XDO supply to supply line of

XDP/XDC

1/2" OD for lengths up to 10 feet (3m)

7/8" OD for lengths over 10 but less than 25 feet (3-7.6m)

From XDO return to return line of

XDP/XDC

7/8" OD for lengths up to 10 feet (3m)

1-1/8" OD for lengths over 10 but less than 25 feet (3-7.6m)

From XDV supply to supply line of

XDP/XDC

1/2" OD for lengths up to 6 feet (1.8m)

5/8" OD for lengths over 6 but less than 35 feet (1.8-10.6m)

From XDV return to return line of

XDP/XDC

5/8" OD for lengths up to 6 feet (1.8m)

7/8" OD for lengths over 6 but less than 35 feet (1.8-10.6m)

CAUTION

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

Liebert XDC

Liebert XDP

XDO/XDV

XDCoolant

Liebert XDC

Liebert XDP

Return Lines

Supply Lines

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 51 52

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