Technical Specifications

Designing a Liebert XD Solution
39
3.21 Liebert XD Flex Pipe Kit
Liebert XD Flex Pipe kits are available in lengths of 4, 6, 8 and 10 feet (1.2, 1.8,2.4 and 3 meters).
Connection style to the module end may be straight or 90 degrees with one-shot or removable
connections. Connection to the prefabricated piping assembly is a threaded coupler. For data on
acquiring the correct kit for your installation, see Table 14.
3.22 Liebert XD Refrigerant
The refrigerant used in the Liebert XD system is HFC-134a (1,1,1,2-tetrafluoroethane), made by a
number of manufacturers. The amount of refrigerant used by the Liebert XD system may be
significantly higher than in typical DX cooling systems.
NOTICE
Risk of improper oil use. Can cause equipment damage.
The Liebert XD pumped R-134a refrigerant circuits do not use refrigerant oil. Do NOT put oil
in the R-134a system.
All the major components of a Liebert XD system must be installed in a space with a volume of at
least 1,000 ft
3
(28.3m
3
) for each 13 pounds of refrigerant in that system from ANSI/ASHRAE
Standard 34-2007, Designation and Safety Classification of Refrigerant If the Liebert XDP/Liebert
XDC is placed in a separate area, such as a machine room, then this area must also meet the volume
requirement. Inside the critical space, this includes the space under the raised floor, and the space
between the top of the raised floor and the bottom of a suspended ceiling. If the suspended ceiling is
all open grates, then this additional space, up to the overhead deck, would also be included.
Table 14 Liebert XD Flex Pipe assemblies, supply and return
Description
Liebert XDV
Liebert
XDCF
Liebert
XDO Liebert XDH Liebert XDR
One-Shot
Couplings
Removable
Couplings
One-Shot
Couplings
One-Shot
Couplings
One-Shot
Couplings
Removable
Couplings
One-Shot
Couplings
Removable
Couplings
4ft long (1.2m), 0º 186568G4 187867G4 186568G4
2
186566G4 2 x 186566G4 2 x 187865G4 186566G4 187865G4
4ft long (1.2m),
90º
186567G4 187866G4 — 186565G4 2 x 186565G4 2 x 187864G4 186565G4 187864G4
6ft long (1.8m), 0º 186568G1 187867G1 186568G1
2
186566G1 2 x 186566G1 2 x 187865G1 186566G1 187865G1
6ft long (1.8m),
90º
186567G1 187866G1 — 186565G1 2 x 186565G1 2 x 187864G1 186565G1 187864G1
8ft long (2.5m), 0º 186568G3 187867G3 186568G3
3
186566G3 2 x 186566G3 2 x 187865G3 186566G3 187865G3
8ft long (2.5m),
90º
186567G3 187866G3 — 186565G3 2 x 186565G3 2 x 187864G3 186565G3 187864G3
10ft long (10m),
0º
186568G2 187867G2 186568G2
3
186566G2 2 x 186566G2 2 x 187865G2 186566G2 187865G2
10ft long (10m),
90º
186567G2 187866G2 — 186565G2 2 x 186565G2 2 x 187864G2 186565G2 187864G2
Min Bend Radius,
Supply
1
7" (178mm) 7" (178mm) 7" (178mm) 7" (178mm) 7" (178mm) 7" (178mm) 7" (178mm) 7" (178mm)
Min Bend Radius,
Return
1
8" (203mm) 9" (229mm)
1. The minimum bend radius is for the flexible portion of the Liebert XD Flex Pipe. Because a section of hard pipe is at each end of the
Liebert XD Flex Pipe, the minimum bend radius can be larger.
2. Top Module
3. Bottom Module