VMAC – Vehicle Mounted Air Compressors
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Fax: 1-250-740-3201
21
Single Speed
For single speed operation, do not use the purple wire from the
PREDATAIR60 wire harness. Connect a throttle control so that the
engine goes to the desired speed when the compressor is engaged
(Figure 15).
Red
Purple
Green
From PREDATAIR60
activation circuit
Throttle control
12V input when
activation circuit is
switched on
Speed 1
Set speed 1 to achieve desired CFM
(not connected)
Figure 15 – Single speed operation
Two Speed
There are two options for two speed operation:
Speed 1 This is typically set for the minimum GPM rating. The
engine stays at base idle when only the PTO is
engaged. This is desirable for cold climate start-up as it
keeps hydraulic pressure low during warm-up. A preset
throttle speed is activated when the compressor is
switched on to provide the minimum GPM rating
(Figure 16).
Speed 2 The purple wire is used to activate a second preset
throttle speed that will provide the maximum GPM
rating (Figure 16)
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