Electrical Connections; Pictographs - Atlas Copco GA55 Instruction Book

Instruction book
Supply Frequency -
voltage Approval
(V)
220-230 60 - IEC
220-230 60 - CSA/UL
380 60 - IEC
380 60 - CSA/UL
440-460 60 - IEC
440-460 60 - CSA/UL
575 60 - IEC
575 60 - CSA/UL
2.4 Electrical connections (Figs. 1.7 and 1.8)
- Provide an isolating switch.
- Check the fuses and the setting of the overload relay. See section 7.
- If terminals 1, 3 and 5 of motor contactors (K21) and (K23) are not bridged, connect power supply cables to terminals 1, 3
and 5 of contactor (K21) and to terminals 1, 3 and 5 of contactor (K23).
- If terminals 1, 3 and 5 of motor contactors (K21) and (K23) are bridged, connect the power supply cables to terminals 1, 3 and
5 of contactor (K21).
- Connect the earth conductor to earth bolt (PE) and the neutral conductor (if provided) to connector (N).

2.5 Pictographs

1 Water outlet
2 Manual condensate drain
3 Water inlet
4 Automatic condensate drain
5 Before connecting compressor
electrically, consult Instruction
book for motor rotation direction
6 Switch off voltage and
depressurize compressor before
repairing
7 Torques for steel (Fe) or brass
(CuZn) bolts
8 Lightly oil gasket of oil filter,
screw it on and tighten by hand
(approx. half a turn)
9 Consult Instruction book before
greasing
10 Switch off voltage before
removing protecting cover inside
electric cubicle
11 Consult Instruction book before
carrying out maintenance
12 Stop compressor before cleaning
coolers
13 Warning: voltage
14 Warning: potential risk of sudden
releasing of spring underneath
cover of unloader during
disassembling, have possible
repair carried out by Atlas Copco
2920 1381 02
LC cable MC cable
GA Pack GA Pack
(mm²/AWG) (mm²/AWG)
2x 70 2x 95
2x AWG0 2x AWG4/0
2x 35 2x 35
2x AWG3 2x AWG1
70 95
AWG0 AWG4/0
50 70
AWG1 AWG2/0
Fig. 2.4 Pictographs (typical examples)
LC cable MC cable
GA Full-feature GA Full-feature
(mm²/AWG) (mm²/AWG)
2x 95 2x 95
2x AWG0 2x AWG250
2x 35 2x 50
2x AWG3 2x AWG0
95 95
AWG0 AWG250
70 70
AWG1 AWG3/0
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