FAQs : AIRSTAGE™ (VRF Systems) Does a VRF system require Traps and Sight Glasses?

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Because of efficient oil management, a VRF system does not require any traps or sight glasses. Instead, most of the oil is collected in the oil separator, located immediately after the compressor. For the small amount of oil that makes its way into the system, a VRF system will go into “oil recovery” mode. During oil recovery, the compressor ramps up and pushes any lingering oil back to the accumulator where it can be returned to the compressor.

"AIRSTAGE" is a trademark of Fujitsu General Limited.