Installation Procedures - Liebert LSF24 User Manual

2.4 Installation Procedures

Note
To ensure the safety, before welding the pipeline and patching welding, all nitrogen of air condition system must be discharged to
release the system pressure.
Installing pipelines
Note
1. The copper pipes should be heat preserved. When the copper pipes pass through the wall or other obstacles, take isolation
measure such as using the shock pad to avoid direct contact with the wall. Prevent the dust, water vapor and solid particles from
entering the copper pipes.
2. To ensure the quality of welding, the silver-based solder with good quality is required to weld the elbow- pipe. The nitrogen
protection should be done while welding.
1. Identifying the pipe sizes
Refer to Installing Unit Pipes in Liebert PEX Series Air Conditioner User Manual for pipe sizes.
2. Identifying the condenser installation height
Refer to Installing Unit Pipes in Liebert PEX Series Air Conditioner User Manual for the installation height.
3. Installing pipes
Install the pipes according to the factual conditions and industry standard.
Connecting external power (external power supply of the condenser)
1. Identifying the cable specifications
Select the power supply cables and the start/stop signal cables of the condenser according to the fan rated operation
current (see Table 2-1) and the site conditions, such as the distance between indoor unit and condenser.
LSF24
LSF32
LSF38, LSF42, LSF52, LDF42, LDF52
LSF62, LSF70, LDF62, LDF70
LSF76, LSF85, LDF76, LDF85
Note
1. The 20AWG (0.52mm
2. The protected tube or shielded line is required for the outdoor part of the connection cable between the indoor unit and the
condenser. The ground cable should be connected to the ground nearby, and the length cannot exceed 3m.
3. The cables cannot contact with hot objects, such as the copper tube and water pipe without insulation, to avoid damaging the
insulation layers.
4. The cables should be connected in accordance with the local regulations.
2. Connecting cables
Figure 2-4 Vertical installation space requirement (unit: mm)
Table 2-1 Operation current of fan under 380V voltage
Condenser Model
2 ) start / stop signal cable of the condenser is recommended.
Liebert PEX Condenser User Manual
4000
Air flow
Chapter 2 Installation
600
Rated current (A)
1.65
1.05
2.4
3.3
4.8
7