Installation Procedures - Emerson Liebert PEX User Manual

2.4 Installation Procedures

Note
Before commencing installation hot works, release all nitrogen holding charges from the indoor and outdoor units.
Installing pipelines
Note
1. Protect copper pipes from heat sources. Isolate copper pipes from structures or other obstacles using rigid supports. Avoid dust,
water vapor and irrelevant objects from entering copper pipes.
2. Use a good quality, silver-based solder for all brazed connections. Use refrigeration grade copper pipes and fittings throughout
the installation. Purge all pipes with nitrogen during brazing to prevent oxidation.
1. Identify the pipe sizes
Refer to 2.6 Installing Unit Pipes in Liebert.PEX Series Air Conditioner User Manual for pipe sizes.
2. Identify the condenser installation height
Refer to 2.6 Installing Unit Pipes in Liebert.PEX Series Air Conditioner User Manual for installation height.
3. Install the pipes
Install the pipes according to local and national codes and standards.
Connecting external power (external power supply of the condenser)
1. Identify the cable specifications
Select the power supply cables and start/stop signal cables of the condenser according to site conditions, such as the
distance between the indoor unit and the condenser.
LSF12
LSF18
LSF24
LSF32
LSF38, LSF42, LSF52, LDF42, LDF52
LSF62, LSF72, LDF62, LDF72
LSF76, LSF85, LDF76, LDF85
Note
1. It is recommended to use the 20AWG (0.52mm
2. The outdoor air cooled condenser requires a three-phase, neutral and earth power supply. The indoor PEX unit is the
recommended point of connection for this electrical service and includes a three-pole circuit breaker rated at 16 amps.
3. The cables should not contact hot objects, such as the copper pipe and water pipe without insulation, to avoid damaging the
insulation layers.
4. The cables should be connected in accordance with the local regulations.
2. Connect the cables
See Figure 2-5, Figure 2-6 and Appendix 1 Circuit Diagram for the connections of external power cables.
Table 2-1 Operation current of fan under 400V voltage
Condenser Model
2
) cable as the condenser start/stop signal cable.
Liebert.PEX Condenser User Manual
Chapter 2 Installation
FLA (A)
0.79
1.45
1.65
1.05
2.4
3.3
4.8
7