8 Chapter 2 Installation
Waterproof joint of external
power cables by others
Accessing terminal of external
power supply (single fan)
Fan speed controller board
Figure 2-5 Connection figure of single fan external power cables (taking LDF42 for example)
Accessing terminal of external
power supply (double fans)
Fan speed controller board
Waterproof joint of external
power cables by others
Figure 2-6 Connection figure of double fans external power cables (taking LDF62 for example)
Note
1. The external power cables and compressor signal cables enter the electrical control box through the waterproof joint of
external power cable whose inner diameter is
Φ
10mm.
2. After connecting the external power cables, apply waterproof sealant treatment to ensure the good waterproof performance of
electrical control box.
3. The phase sequence of three-phase AC input (L1, L2, L3) must be correct. Otherwise, the fan speed controller will generate the
phase loss alarm, and there will be no AC output.
4. For dual circuit condenser (such as LDF42, LDF52, LDF62, LDF72, LDF76 and LDF85), the four condenser start/stop signal
cables should be paralleled at the terminal block of indoor unit before connection; for single circuit condenser, the two condenser
start/stop signal cables can be connected directly.
Charging refrigerant and adding cooling oil
Refer to
2.6 Installing Unit Pipes
in
Liebert.PEX Series Air Conditioner User Manual
for charging refrigerant and
adding cooling oil.
Liebert.PEX Condenser User Manual
