• Verify the Air Control Valve is fully opened
• Verify the Onboard Air Pressure Regulator is set correctly
• Verify the air hose/piping is free of restrictions
• Verify the air supply system is delivering at least 90-100 cfm per unit at 100-150 psig.
• Check that there are no air leaks within the ZEVAC® Air System
• Call 1-855-ZEVAC-GO for support if the problem is unresolved
ZEVAC® IS MAKING ABNORMAL SOUNDS
• The ZEVAC® will normally produce several audible sounds during operation. The most
notable is the steady exhausting of the driving air. This release of air pressure should be
intermittent, occurring as the unit changes directions back and forth internally.
• The ZEVAC® may automatically or manually dump water from the air system during
normal operation, and this water release will be audible and visible.
• The ZEVAC® gas compression system is a dry non-lubricated system. Depending on the
cleanliness and lubricity of the product being moved, the internal parts may squeak. This
is not an abnormal operating condition, but the symptoms should not persist or increase
beyond a temporary condition.
• Any sudden “Bang” or the non-intermittent sound of gas being released is an indicator
of an abnormal operating condition. Follow SHUTDOWN procedure and call 1-855-
ZEVAC-GO for support and maintenance.
FROST IS FORMING ON ZEVAC COMPONENTS
• In low temperature ambient conditions, water vapor in the air system can freeze.
Freezing can damage the components and poses a safety hazard. Take steps to prevent
freezing in the air system.
• In certain product streams, at certain temperatures and pressures, a phase change can
take place within the ZEVAC, which can produce low temperatures. Exercise extreme
caution to avoid conditions that cause local temperatures to drop below the minimum
design metal temperature MDMT (-20F).
WATER IS BLOWING OUT WITH THE AIR EXHAUST
• It is common for air compressors to introduce moisture to the air supply. There is
equipment on the ZEVAC® that is designed to eliminate as much of this water as
possible, but it is common in certain operating conditions such as high humidity for
water vapor, mist, and liquids to be present in the air system. Water in the air system
will reduce the lifespan of the system.
• Verify air/water separator is draining
• Verify filter is draining
• Vent cylinders to release any captive water in the drive cylinder
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