Le/Lf/Lt; Le/Lf/Lt Trolley; Electrical Connections - Atlas Copco LE15 Instruction Book

Instruction book

2.2.1 LE/LF/LT

Install the compressor horizontally, in a cool but frost-free
and well-ventilated room. Place the compressor as level as
possible; however, LE/LT can be operated with an angular
deviation below 22.5 degrees in any direction, LF can operate
with any angular deviation, in any direction. The air should
be clean.
A Pack Unit must be installed away from walls to allow easy
maintenance. Keep the ventilation openings free.
It is recommended to install an automatic condensate drain
(available as an option) on the air receiver to ensure continuous
condensate removal.

2.2.2 LE/LF/LT Trolley

- The compressors are equipped with a lifting eye or yoke
(1-Figs. 1.15 and 1.16).
- When running, the compressor must be installed as level
as possible; however, it can be operated temporarily in an
out-of-level position not exceeding 15 degrees. Keep the
compressor in a frost-free and well-ventilated place.

2.3 Electrical connections

The electrical installation must be carried out by an electrician
and correspond to the local codes.
The indications on the motor data plate must correspond to
the mains supply voltage and frequency. The installation must
include an isolating switch in the power line near to the unit
and be protected against short-circuits by fuses in each phase.
See section 2.4.
The mains supply and earthing lines must be of suitable size.
See section 2.4.
For DOL starters, connect the power supply cables as shown
on Figs. 2.22/2.23. For Y/D starters, connect the power supply
cables to strip (X1-Fig. 2.21) as shown on Figs. 2.24/2.26.
Check the setting of the overload relay. See section 2.4.
2920 1257 04
S1 F1 K1
X1
F1 Fuse
K1 Line contactor with integrated Y-D timer
K2 Star contactor
K3 Delta contactor
P1 Hourmeter, running hours
X1 Terminal strip
S1 On/off switch
Fig. 2.21 Electric cabinet
F1/3 Fuses
F4 Overload relay
K1 Line contactor
K2 Star contactor
K3 Delta contactor
M Compressor motor
MDR Air pressure switch
P1 Hourmeter, running hours
S1 On/off switch
T1 Transformer
Y1 Loading solenoid valve
X1 Terminal strip
Figs. 2.22 up to 2.26 Electrical diagrams (see pages 28-29)
K3 K2 P1
50959F
27