Installing Pipe Extension Kit (Optional, For Site Installation); Lowering Fan (For Down Flow Unit) - Liebert PEX+ Series User Manual

2. D: discharge line, L: liquid line.
3．Consult Emerson if the line length exceeds 60m.
4. If the outdoor temperature of the unit is below-15℃, the low temperature kit shall be used, and please consult Emerson for details.

3.6.5 Installing pipe extension kit (optional, for site installation)

When the equivalent length of the one-way pipe exceeds 30m, the pipe extension kit should be installed. During the
installation of the pipe extension kit, to avoid the pipe opening, it is recommended to install the solenoid valve of the
pipe extension kit onto the outside project pipe of the ball valve on the liquid pipe. The outer side or the bottom of the
unit is allowable. So, during installing the solenoid valve, you do not need to cut the indoor unit pipes. After the whole
system is installed, you can open the ball valve to keep pressure and carry out the vacuum operation, avoiding the
moisture absorption of the compressor refrigeration oil and ensuring the operation safety and life of the compressor.
For the installation position of the check valve, refer to Figure 3-1. For the electrical connections of the pipe extension
kit, refer to 4.2.4 (suitable for field installation).

3.7 Lowering Fan (For Down Flow Unit)

Be careful when lowering the fan, avoid trapping your fingers and fan cables.
Avoid foreign matter falling into the inlet ring of the fan.
You must lower all EC fans of the downflow unit before commissioning. The downflow unit has been equipped with a
lowering tool when it is shipped. The lowering tool that uses winch is shown in Figure 3-12. It mainly includes a hand
winch, a winch bracket, a hook, a sling, and a handle, and also an L shaped lifting component in Figure 3-13.
Lowering procedures:
1. Install lift and lowering kit for fan: Open the unit maintenance cover, check the fixing bolts and washers II (see Figure
3-13, totally 2 PCS) of the L shaped lifting component to make sure that it is fixed properly, and then install the fixing
bolts and washers IV (totally 4 PCS) of the winch bracket, as shown in Figure 3-13;
Recommended pipe sizes (unit: mm)
Winch
bracket
Hook
.
Figure 3-12 Fan elevator assembly (winch mode)
Liebert. PEX+Series Precision Air Conditioner
Chapter 3 Mechanical Installation
Winch
Sling
User Manual
17
Handle