10-2014 gForce User Manual ● 49
compressor is idle, the oil temperature in the sump of the compressor must be
maintained at no lower than the 10⁰ F above the saturation temperature of the
refrigerant on the low pressure side. This ensures that liquid refrigerant is not
accumulating in the sump.
7.4 Oil Level
When the compressor is running under stable conditions the oil level must be visible in
the sight glass. The presence of foam filling the sight glass indicates large
concentration of refrigerant in the oil and/or presence of liquid returning to the
compressor. The oil level can also be checked a few minutes after the compressor is
shut down, the level must be between ¼ and ¾ of the sight glass. When the
compressor is OFF, the level in the sight glass can be influenced by the presence of
refrigerant in the oil.
Always use original Danfoss POE oil 160SZ from new cans. Top-up the oil while the
compressor is at idle. Use a Schrader connector or any other accessible connector on
the compressor suction line and a suitable pump.
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