Installing Outdoor Unit; Piping; Piping For Air-Cooled Unit - Emerson Liebert PEX Series User Manual

24 Chapter 2 Mechanical Installation
Item
Steel plate
Angle steel
Top
Rubber
Lateral
cushion
Bottom
Installation hole of
anchor bolt
One-bay
H
Two-bay
Three-bay
Note:
The external side boards of the unit cannot bear weight. Take the mounting base into consideration while selecting angle steels
and fixing holes. For the downflow unit used EC fan, the minimum floor height requirement must be met

2.5 Installing Outdoor Unit

This outdoor unit is only applicable to the air-cooled series air conditioner. For detailed installation, refer to Liebert.PEX
Condenser User Manual.

2.6 Piping

2.6.1 Piping For Air-Cooled Unit

All joints of the cooling pipes must be silver-brazed. Standard industry procedures must be followed in selecting, laying,
and fixing the pipes, and evacuating the system and charging refrigerant. Take pipeline pressure drop, oil return to the
compressor and minimization of noise and vibration into consideration during design and construction.
General
The recommended pipe sizes are 'equivalent lengths' (see Table 2-6 for equivalent lengths of partial components),
with the resistance caused by bends taken into account. The installer should confirm that the sizes are appropriate for
the site conditions.
1. If the one-way equivalent length exceeds 30m, or if the vertical distance between indoor unit and outdoor unit
exceeds the values in Table 2-5, consult Emerson before installation to confirm whether a pipe extension kit is needed.
Outdoor unit higher than indoor unit
Outdoor unit lower than indoor unit
2. The pipe sizes recommended in Table 2-6 are 'equivalent lengths', with the resistance caused by bends and valves
taken into account. The installer should confirm that the sizes are appropriate for the site conditions.
Outer Diameter (OD) of
liquid pipe (inch)
3/8
1/2
5/8
3/4
7/8
1-1/8
Table 2-4 Specifications of indoor unit mounting base
Specification
100mm × 100mm × (5 ~ 6.5)mm
40mm × 40mm × 3mm
Thickness: 3mm ~ 5mm
Thickness: 2mm ~ 3mm
Thickness: 10mm ~ 12mm
-
H = 200mm (upflow unit)
H ≥ 300mm (downflow unit of
forward curved fan)
H ≥ 325mm (downflow unit of EC
fan)
Table 2-5 Vertical distance between indoor unit and outdoor unit
Relative position
Table 2-6 Equivalent lengths of partial components
90° bend
0.21
0.24
0.27
0.3
0.44
0.56
Liebert.PEX2 Series Air Conditioner User Manual
Remark
-
-
Supplied by others
Supplied by others
Supplied by others
Install the bolts according to your requirement
1. Only three-bay unit needs the middle support (front and rear).
2. The upflow unit does not need the flow deflector.
3. The H dimension here is only for reference, and should be
determined according to user's actual requirement while
making the base
altitude difference
Max.: +20m
Max.: -5m
Equivalent length (m)
45° bend
0.10
0.12
0.15
0.18
0.24
0.3
T type three-way
0.76
0.76
0.76
0.76
1.1
1.4