Best Practice Allow V30 Systems to Blow Down Before Restart

Technical Support Subject Best Practice: Allow V30 Systems to Blow Down Before Restart Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VL-006 A Tech Document Release BDJ 14 Aug 2017 GB 14 Aug 2017 N/A 14 Aug 2017 Page 1 of 1 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 System or Parts affected – V30 VR Lite systems All V30 VR Lite Underhood compressor systems. Overview • During normal use, the V30 compressor builds to its set maximum downstream pressure, after which the compressor clutch will disengage and the system will “blow down” its internal pressure. • When downstream pressure drops due to air demand (tools etc.) the clutch engages and the system builds air pressure to compensate until it reaches the set pressure, as described above. • Best practice for increased compressor life is to allow the system to completely blow down between air usage. • When the compressor clutch disengages, there will be an audible hiss of air from the blowdown muffler located either on the WHASP tank (Figure 1), or plumbed to a location outside of the vehicle body (Figure 2). Allow this blowdown to completely subside before using air again. This will take between 15-20 seconds. Failure to allow blowdown between cycles can decrease efficiency and reduce compressor life. Figure 1 Figure 2 Blowdown Muffler Blowdown Muffler (external)