Chapter3 Mechanical Installation 17
Liebert. PEX+Series Precision Air Conditioner User Manual
Recommended pipe sizes (unit: mm)
Model
P1050
dual system
P2060
dual system
P2070
dual system
P2080
dual system
P2090
dual system
P1050 single
system & P2100
dual system
Pipe
length
D
L
D
L
D
L
D
L
D
L
D
L
10m
22
13
22
16
22
16
22
16
22
16
22
16
20m
22
13
22
16
22
16
22
16
22
16
25
16
30m
22
16
25
16
25
16
25
19
25
19
28
19
40m*
22
16
25
19
25
19
25
19
28
19
28
19
50m*
22
16
25
19
28
19
28
19
28
19
28
19
60m*
22
16
25
19
28
19
28
19
32
19
32
19
Note:
1. Extension kit should be added to the “Eq.Lgth” marked with *.
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)
warning
！
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 3-13. 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 3-14.
.
Figure 3-13 Fan elevator assembly (winch mode)
Lowering procedures:
1. Install lift and lowering kit for fan: Open the unit maintenance cover, check the fixing bolts (see Figure 3-14, totally 2
PCS) of the L shaped lifting component to make sure that it is fixed properly, and then install the fixing bolts (totally 4
PCS) of the winch bracket, as shown in Figure 3-14;
Hook
Handle
Winch
bracket
Sling
Winch
