Electrical Connection; General Recommendations; Electrical Installation - Emerson Copeland YB56K1G Application Manuallines

4

Electrical connection

4.1

General recommendations

WARNING
Conductor cables! Electrical shock hazard! Shut off power supply before
undertaking any task on electrical equipment.
WARNING
Ignition source in a potentially flammable atmosphere! Fire hazard! The
electrical connection of the scroll compressor is not an ignition source during
normal operation in A3-refrigerant systems but could become one if not
installed properly according to installation instructions. Ensure correct
mechanical and electrical installation.
System capacitors may remain charged for several minutes after shutdown.
Before starting to work on the electrical installation make sure sparking is not
possible. Continuously check if the ambient atmosphere is non-flammable
when working on the electrical installation.
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.
For safety reasons, Copeland recommends that the electrical installation be executed in compliance
with standard EN 60204-1 and/or other standards and regulations of application when dealing with
A3 flammable refrigerants.
When installing YB*K1G compressors in a system, the following measures must be taken:
▪ To ensure the wires are properly terminated, the correct terminal and clamping tool for the
selected wire size must be used.
▪ The ground wiring must conform to local regulations and codes of practice (only the supplied parts
must be used).
▪ The grounding screw must be torqued to 2.4 to 2.6 Nm.
▪ A cable strain-relief device must be added.
▪ Cable and wires must be protected against sharp edges.
4.2

Electrical installation

For recommended wiring diagrams, see Figure 15 next page.
NOTE: A contactor K2 has to be used for the safety chain to comply with EN 60335 and
EN 60204-1.
NOTE: It is mandatory to install a residual current device (RCD) in any electrical system
associated with YB*K1G compressors and flammable refrigerants such as R290. The purpose
of the RCD is to detect current leaks to the ground in case of electrical issues, for example
with the terminal connection pins or electrical accessories.
Figure 14: Residual current device (RCD)
AGL_Ref_ST_YBK1G_EN_Rev01 17