Electrical Connection; General Recommendations; Electrical Installation; Single-Phase Motors - Code C - Emerson Copeland Discus Series Application Manuallines

4

Electrical connection

4.1

General recommendations

The compressor terminal box has a wiring diagram on the inside of its cover. Before connecting
the compressor, ensure the supply voltage, the phases and the frequency match the nameplate
data.
When the compressor is shipped the motor protector is mounted in the terminal box. The
thermistors are factory connected. The power supply and the control circuit must be wired
according to the wiring diagram (see wiring diagram on the inside of the terminal box lid).
Figure 12: Terminal box preparation for cable gland fitting - Note position of screwdriver!
Position at Diameter of hole at
terminal box terminal box (mm)
1
2
3
4
Table 2: Characteristics of the holes for cable bushings
Figure 13: Position of the holes for cable bushings (top view of a 6-cylinder compressor)
The protection class of each terminal box according to IEC 60529 is given in Table 3 hereunder:
Old models
DK, DL, D2D, D2S
D3D, D3S
D4D, D4S
D6D, D6S, D6T
D8D, D8S
Table 3: Protection class of terminal box according to IEC 60529
Cable glands can influence the protection class. Factory-fitted cable glands reduce the
protection class to IP41.
4.2

Electrical installation

4.2.1 Single-phase motors – Code C
Compressors up to model DKSL-15X are available with single-phase motors. They have one
main and one auxiliary winding. A single-phase equipment consisting of a start and run capacitor
16
Cable bushing
metric
20.6 M20 x 1.5
32.5 M32 x 1.5
50.5 M50 x 1.5
63.5 M63 x 1.5
Present models
K, L, 2D
3D
6T
8D
Outside
diameter (mm)
20
32
50
63
Class Option
IP54 -
IP54 IP56
IP54 IP56
IP54 IP56
IP54 IP56
D6.3.4/0715-0716/E