Operation - Atlas Copco LF 2 Instruction Book


For LF 2 up to LF 3: The compressor block as described above, with flanged-on electric motor (M), check
valve (CV) and safety valve (SV).

For LF 5 up to LF 10: the Compressor Block as described above, with flanged-on electric motor (M) and
solenoid valve (Y1)
The tank-mounted unit comprises:

For LF 2 up to LF 3: The Power pack mounted on a horizontal or vertical air receiver (AR) with air outlet
valve (AV), pressure gauge (Gp), safety valve (SV), air pressure switch with an on/off button (MDR) and
condensate drain valve (Dm).

For LF 5 up to LF 10: 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 (8) includes
the motor starter. A separate air pressure switch (MDR) is provided.
The base-mounted unit is a fully operational unit with air pressure switch and on/off switches
mounted on a frame (no air receiver).
LF Trolley units are mobile compressors. They are equipped with either a directly flanged electric motor or a
petrol engine. 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 provided with a Refrigerant dryer with DD & PD
filter. They remove moisture from compressed air by cooling the air to near freezing point. This causes water to
condense. The condensate is automatically drained. The air is warmed up before leaving the dryer.
2.2

Operation

The compressors are extendible with the following options. For detailed information consult Atlas Copco.
Silencing hood
Receiver upgrade
Pneumatic drain
Interstage drain
Transformer
Motor anti-condensation heaters and
thermistor protection
14
For 90 / 250 /475 Tank Mounted and Base Mounted
Units
Receiver size upgrade
90 to 250 Standard Receiver
Vertical Receiver
upgrade 90 or 250 to 250
Only for 2 and 3hp
475 Receiver
upgrade 90 or 250 to 475
Not available for Trolley versions
Not available
100VA (for cubicle control voltage 400/3/50)
YD only
Used with LF 2-10 with 400V/50Hz and
460V/60Hz
Instruction book
2920 7090 00