3.3.2 Two Speed
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 power to the
compressor is switched on to provide the minimum
GPM rating before starting the PREDATAIR (Figure 9).
Speed 2
The purple wire is used to activate a second preset
throttle speed that will provide the maximum GPM
rating (Figure 9)
Red
Purple
Green
From PREDATAIR
Power circuit
Throttle control
12V input when activation circuit is switched on
and the purple wire is grounded by the control system
Speed 1
Speed 2
Set Speed 1 to the miniumum GPM rating
Set Speed 2 to achieve the desired CFM
86
87
87A
30
85
Figure 9 – Two speed operation
VMAC – Vehicle Mounted Air Compressors
Toll Free:
1-888-241-2289 Local: 1-250-740-3200
Fax: 1-250-740-3201
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