VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com
39
When connecting a large capacity receiver tank, users may experience
situations where the system does not unload after reaching 140 psi
(See the “System Pressure Unload” section on page 28 for more
information). If this happens, the regulator on the inlet valve may
need to be adjusted. See page 70 for instructions.
An air receiver tank provides a buffer as it gives the compressor time to react by
increasing the engine speed and producing air before the tool stalls. It also has the
advantage of lowering the duty cycle of the compressor system.
The VMAC compressor system automatically depressurizes when it is shut-down.
The WHASP Tank has a built-in check valve which prevents the compressed air and
any moisture in receiver tank from traveling back into the WHASP Tank.
Installation of an additional one-way check valve will cause erratic performance
Figure 22 — Air receiver tank
Air Receiver Tank
The WHASP Tank has a built-in check valve. Use of an additional
check valve is not required and may cause erratic performance.
If an air receiver tank will be used with this system, the following
installation procedure must be used to prevent damage to the
system.
Install the line to the receiver
tank as high as possible
Air Receiver Tank
WHASP Tank
Factory installed
check valve
Pressure in the air receiver tank will not be relieved when the
compressor system blows down. This is normal operation. Prior to
performing any service work on the system, discharge any stored air
in the air receiver tank.
