Emerson Copeland OLE-49, Инструкции по применению

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36 AGL_Unit_LOCU_EN_Rev00
After start-up and when operation conditions have stabilised:
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It is recommended to check the oil level in the compressors and to add oil if necessary to ensure
a suf f icient oil level (halfway up the sight glass).
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The f ollowing should also be checked:
✓
Phase rotation of scroll compressors.
✓
Fan rotation.
✓
Ref rigerant level.
✓
Oil level in oil reservoir.
✓
Expansion valve superheat.
NOTE: Before first compressor start in OMTE and OLTE units, the oil level in the non-digital
compressor can be higher than halfway up the sight glass. This is normal and is no risk for
the unit. The oil level should be at standard level after first compressor start.
4.6 Pressure fluctuations in case of digital unit
Digital scroll compressors are capable of capacity modulation. A normally closed (de-energized)
solenoid valve is a key component for achieving modulation. When the solenoid valve is energized,
the two scroll elements move apart axially into the unloaded state. In this state, the compressor motor
continues running, but there is no compression. Within scroll modul ation the suction and the
discharge pressure could fluctuate. During the unloaded state, the discharge pressure will decrease
and the suction pressure will increase. This normal pressure fluctuation has no observable effect on
the reliability of the compressor or system components. However, the installation and setting of
pressure controls should take this into account.