VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com
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“RAMP UP PRESSURE” should only be adjusted if the maximum
system pressure is changed (via the inlet regulator). To maintain
proper performance, and rapid response to air demand, ensure
the “RAMP UP PRESSURE” is set at no more than 20 psi below the
maximum system pressure.
The “RAMP UP PRESSURE” can be set to “100 PSI”, “120 PSI”, “140 PSI”, or “160
PSI via the “
“ or “
” buttons in the “RAMP UP PRESSURE” column; an LED will
illuminate beside the setting that has been selected.
MAX RPM
The cfm produced by the system is directly related to engine speed; refer to the
table on page 52 for the cfm values for each DTM model.
Maximum VMAC rpm can be adjusted (in 50 rpm increments) via the “
“ or “
”
buttons in the “MAX RPM” column. The rpm adjustment range is dependent upon
the DTM model (Table 2).
•
When the PTO mode selector switch is set to “VARIABLE RPM”, the “
“ or “
”
buttons adjust the VMAC maximum rpm.
•
When the PTO mode selector switch is set to “FIXED RPM”, the “
“ or “
”
buttons adjust the VMAC base idle rpm.
RAMP UP PRESSURE
“RAMP UP PRESSURE” is the amount of pressure the system will drop before the
engine speed is increased to generate air; as air continues to be used and the
pressure drops, engine speed will increase until maximum VMAC rpm is achieved.
“RAMP UP PRESSURE” is set to 140 psi (10 psi below the factory default maximum
system pressure of 150 psi). This allows for a small amount of air use without the
need to increase engine speed.
Model
Engine Speed Range
DM2A021
1,700 - 2,500
DM2B021
1,700 - 2,300
DM2C021
1,700 - 2,100
Table 2 — Engine speed range
