VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com
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Hot Environment Operation
Operating the G300004 fully loaded for extended periods in temperatures above
40 °C (104 °F) may result in the system shutting down due to the compressor
oil overheating. Placing high demand on the engine (e.g. continuous demand at
140 psi) for extended periods can also result in higher than normal engine oil
temperatures. To avoid overheating the engine or compressor, VMAC recommends
installing an air receiver tank. This will help to reduce the duty cycle of the
compressor by allowing it to unload.
The compressor system is protected by a compressor oil temperature switch
that opens at 140 °C (284 °F) and shuts down and disables the engine until the
compressor oil temperature drops below 139 °C (282 °F). The cooling fan will
continue to operate at anytime as it is powered directly from the battery.
If the G300004 shuts off due to overheat, allow the system to cool sufficiently
before restarting.
For engine oil recommendations in temperatures above 40 °C (104 °F) refer to the
Honda GX390 Owner’s Manual supplied with the system (VMAC P/N: 1901066).
Failure to follow the information supplied in the Honda Owner’s Manual may result
in poor engine performance or engine damage.
Hot Environment Recommendations:
•
Ensure there is an adequate supply of cool ambient air to the unit.
•
Ensure the exhaust and hot air are able to vent from the system with no
restrictions.
•
Ensure the WHASP radiator fins and engine recoil starter areas are clear of
debris.
•
Install an external fan to direct cool air toward the engine and air compressor.
•
Ensure the engine and compressor are serviced at correct intervals.
High Altitude operation
The G300004 has been designed to operate from 0 to 3,500 feet above sea level.
Operation above 3,500 feet may limit the compressor performance and may cause
the engine to stall. For operation between 3,500 and 5,000 feet, lowering the
compressor duty cycle is recommended.
For more information regarding high altitude operation refer to the Honda GX390
Owner’s Manual supplied with the system (VMAC P/N: 1901066). Failure to follow
the Honda Owner’s Manual may result in poor engine performance or engine
damage.
A receiver tank can help prevent overheating issues by lowering the
duty cycle of the compressor.
