VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com
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What to Expect at Startup
Manually actuating the unloader valve allows air pressure to be vented to a
nominal value which reduces the load on the engine. during warm up. Once the
system reaches normal operating temperature, manually release the unloader
valve, allowing the system to build air pressure.
Normal operating engine rpm:
•
When unloader is actuated (during warm up): 2,900 ± 100 rpm.
•
When building air pressure: 3,500 ± 100 rpm
(this value can vary due to engine
load, as well as environmental conditions).
•
Once system has built to full system pressure: 2,400 rpm ± 100 rpm.
Starting the engine with the key switch
Starting and Stopping the Engine
The G300004 is designed to operate at an elevated low idle set
point. This is required for optimal engine performance due to
compressor loads. This elevated low idle set point requires the
choke to be applied during both cold and warm starts.
To start the engine (warm or cold), ensure the choke is closed by
confirming that the lever is all the way to the left.
Figure 11 — Fuel and choke levers
Choke lever
Fuel Lever
1) If equipped with the optional VMAC Cold Climate kit, ensure the kit is turned off.
2) Close the choke by moving the choke lever all the way to the left (Figure 11).
1) Turn on the fuel by moving the fuel shut off lever all the way to the right