Vertiv™ | Liebert® SRC-G | User Manual
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Mechanical Installation
2.8. Refrigeration Piping Connection General Principles
1. Copper pipes with quick thread connector are used to connect the indoor and the outdoor units. If the pipe
length exceeds the standard pipe length given in Table 2-7 and straight copper pipe is used, then each joints
of the piping must be brazed properly. Charge the copper piping with nitrogen gas during the brazing process
to prevent it from oxidation.
2. The selection, placement and fixing of piping, evacuating the refrigerant from system and refrigerant charging
are required to operate according to industry standards.
3. The parameters such as pipeline pressure drop, compressor return oil, noise reduction, and vibration should
be considered when designing and construction process.
4. If the equivalent length exceeds 60 m, or the vertical height dierence between the indoor and the outdoor
units exceeds the values given in Table 2-8, consult Vertiv local representative for technical support before
installation and if any modification is required.
5. The equivalent lengths of the components are shown in Table 2-9, and the resistance losses caused by the
elbows and valves have been taken into account. Consult Vertiv representative to confirm the suitability as
per the site conditions.
Table 2-7 Standard Piping Dimensions
Model
Pipe Length Gas Pipe OD Liquid Pipe OD
m inch mm inch mm
SRC03GES 10 1/2” 13 3/8” 10
SRC07GES 10 5/8” 16 3/8” 10
SRC07GET 10 5/8” 16 3/8” 10
SRC11GET 10 7/8” 22 3/8” 10
Table 2-8 Vertical Distance between the Indoor and the Outdoor Units
Relative Position Distance
Outdoor unit installed higher than indoor unit Maximum: 30 m
Outdoor unit installed lower than indoor unit Maximum: 5 m
Table 2-9 Equivalent Length of Each Local Component
Liquid Pipe OD
(inch)
Equivalent Length (m)
90° Elbow 45° Elbow T-type Three Way
5/8 0.27 0.15 0.76
3/4 0.3 0.18 0.76
7/8 0.44 0.24 1.1
1-1/8 0.56 0.3 1.4
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