Air Flow; Le/Lf2 Up To -5, Le7 And Le10 50 Hz (Fig. 1.10); Le10 60 Hz, Le15, -20, Lf7, -10 And Lt (Fig. 1.11) - Atlas Copco LE2 Instruction Book

Instruction book
- For LE/LF/LT5 up to -10, LT15 up to -20: the Compressor Block as described above, with flanged-on
electric motor (M) and solenoid valve (Y1-Fig. 1.5).
The Tank-mounted unit comprises:
- For LE/LF/LT2 and -3: the Power Pack mounted on a horizontal (Fig. 1.4) or vertical (Fig. 1.6) air
receiver (AR) with air outlet valve (AV), pressure gauge (Gp), safety valve (SV), air pressure switch
with on/off switches (13) and condensate drain valve (Dm).
- For LE/LF/LT5 up to -10, LE15, -20 and LT15, -20 (Fig. 1.5/1.7): the Power Pack mounted on an air
receiver (AR) with air outlet valve (AV), pressure gauge (Gp), safety valve (SV) and condensate drain
valve (Dm). An electric cubicle (6) includes the motor starter. A separate air pressure switch (13) is
provided.
A silencing canopy (1-Fig. 1.13) is available as an option. The canopy has a hinged top to allow easy
access for maintenance.
The Base-mounted unit (Fig. 1.8) is a fully operational unit with air pressure switch and on/off switches
mounted on a frame (no air receiver). A silencing hood can be added as an option.
LE, LF and LT Trolley units (Figs. 1.15 and 1.16) are mobile compressors. They are equipped with either
a directly flanged electric motor (LE/LF/LT ETROL - Fig. 1.15) or a petrol engine (LE/LF/LT PETROL - Fig.
1.16). The compressors have two outlet connections:
- a connection for compressed air at working pressure
- a connection for compressed air at reduced pressure via a pressure regulator
The Full-Feature compressor is a Tank-mounted compressor additionally provided with an FX dryer and
DD/PD filters.

1.2 Air flow

1.2.1 LE/LF2 up to -5, LE7 and LE10 50 Hz (Fig. 1.10)

Air drawn through air filter (AF) and inlet silencer (1) into cylinders (3) is compressed, then discharged
through cooler piping (4) and (6) and check valve (CV) into air receiver (AR).

1.2.2 LE10 60 Hz, LE15, -20, LF7, -10 and LT (Fig. 1.11)

Air drawn through air filter (AF) and inlet silencer (1) into LP (low-pressure) cylinder(s) (7) is compressed,
then discharged to HP (high-pressure) cylinder (8) via intercooler (10).
The air is further compressed and discharged through cooler piping (6) and check valve (CV) into air
receiver (AR).
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