Electrical Connection; General Recommendations; Electrical Installation; Molded Plug Connection - Emerson Copeland Scroll ZRH49K 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.
4.2

Electrical installation

WARNING
Conductor cables! Electrical shock! Shut off power supply before and
between each test.

4.2.1 Molded plug connection

WARNING
Electric arc! Explosion hazard! Removing the molded plug cable while
under load or electrically energized will create arcing between the connection
pins and the cable connectors. Always shut off power supply before attaching
or removing the molded plug cable from the connection pins.
The molded plug connector must be smoothly pushed by hand towards the
connection pins of the compressor. Never use a tool to knock the molded plug
connector on the terminal pins as this could damage the glass inserts of the
pins.
It is mandatory to secure the molded plug cable on the connection pins with a
retainer.
Any rework on the terminal pins is strictly prohibited.
WARNING
Electrical shock hazard! Serious personal injuries and/or system
breakdown! Use qualified molded plug cables with grounding connection
only. Make sure to connect the grounding first before attaching the molded
plug cable to the connection pins of the compressor. When removing the
molded plug cable from the connection pins, disconnect the grounding last.
ZRH* and ZBH* horizontal Scroll compressors are equipped with electrical connection pins ready for
molded plug connection. This version is compliant with all CE and safety regulations and its
protection class is IP65. The molded plug kit includes an O-ring, a grounding connection and a
retainer (see Figures 9 to 11).
Figure 9: Circle fence
with motor terminals

4.2.2 Assembly of the molded plug cable

▪
Make sure to use only qualified molded plug power cables with grounding connection.
▪
Check that the O-ring on the molded plug connector is in place and not damaged.
▪
Shut off power supply.
▪
Check that the circle fence is clean and dry before connecting the molded plug power cable.
▪
For molded plug cables with grounding: connect the grounding of the molded plug power cable
to the compressor circle fence.
C6.2.7/1007-0619/E
Figure 10: Power cable molded plug
(IP65)
Figure 11: Connecting the molded plug
power cable to the connection pins
11