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Operating compressor models YRHV*KTE/KTG over a defined frequency range will result in different
application envelopes – see Figures 17 & 18. These envelopes are more restricted at lower
operating speeds. This is to prevent bearing overloading and overheating of the compressor motor
during low-speed operation.
Figure 17: Operating envelope for variable-speed YRHV*KTG with R290
Figure 18: Operating envelope for variable-speed YRHV*KTE with R454C
4.7
High-potential testing
WARNING
High-potential testing in a flammable atmosphere! Fire hazard! Make sure
the atmosphere is non-flammable before performing high-potential testing. DO
NOT perform any high-potential test when the compressor is charged with
flammable refrigerant.
WARNING
Conductor cables! Electrical shock hazard! Shut off power supply before
high-potential testing.
CAUTION
Internal arcing! Motor destruction! Do not perform high-voltage or insulation
tests if the compressor housing is under vacuum.
Emerson subjects all scroll compressors to a high-voltage test after final assembly. Each motor
phase winding is tested according to EN 60335 with 2400 V +/-400 V AC RMS (root mean square).
AGL_AC_ST_YRH_EN_Rev01
17
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