Electrical Connection; General Recommendations; Electrical Installation - Emerson Copeland YF05K1E 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.
For saf ety reasons, Emerson 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
A2L mildly flammable refrigerants such as R454C, R455A and R454A.
When installing YF*K1E compressors in a system, the following measures must be taken:
▪ To ensure the wires are properly terminated, the correct terminal and clamping tool f or the
selected wire size must be used.
▪ The ground wiring must conform to local regulations and codes of practice (only the provided
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

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! In
applications with A2L ref rigerants, the electrical connection of the scroll
compressors is not an ignition source during normal operation but could
become one if not installed properly according to installation instructions.
Ensure correct mechanical and electrical installation.
System capacitors may remain charged f or several minutes af ter shutdown.
Bef ore starting to work on the electrical installation make sure sparking is not
possible. Continuously check if the ambient atmosphere is non-f lammable
when working on the electrical installation.
For recommended wiring diagrams, see Figure 18 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 recommended to install a residual current device (RCD) in any electrical system
associated with YF*K1E compressors and A2L flammable refrigerants such as R454C, R455A
and R454A. 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 17: Residual current device (RCD)
18 AGL_Ref_ST_YFK1E_EN_Rev01