Electrical Connection; General Recommendations; Electrical Installation - Emerson Copeland Scroll YH04K1E 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 safety 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.
When installing YH*K1E 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 provided
parts must be used).
▪ The grounding screw must be torqued to 2.4 to 2.6 Nm.
▪ Add a cable strain-relief device.
▪ Protect cable and wires against sharp edges.
4.2

Electrical installation

WARNING
Conductor cables! Electrical shock! 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 compressors is not an ignition source during
normal operation but could become one when 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.
For recommended wiring diagram, 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 YH*K1E compressors – see Figure 14.
Figure 14: Residual current device (RCD)
AGL_HP_ST_YHK1E_E_Rev02 17