Normal Operation; Shutdown - Doosan XHP1000WCAT-T4i Operation And Maintenance Manual

Operating & Maintenance Manual

Normal Operation

The Operator may observe and monitor operating parameters using the ViewPort and
gauge(s). In the event the compressor controller detects a parameter outside normal operating
limits, the compressor will alert and/or shutdown and display a diagnostic code.
In the event the compressor controller detects a parameter at a dangerously high or low level,
the compressor will automatically shutdown with the cause of the shutdown shown on the
ViewPort.
Delivered air volume at load point pressure is accomplished by two methods, which work
together:
1. The compressor is loaded (inlet valve fully open or modulated partially open) or
unloaded (inlet valve fully closed).
2. Engine speed varies between idle speed and full load speed while compressor
is loaded to match the required volume flow.
Operation - Loaded
Assume engine has been started and is running in the unload state at idle speed. If there is air
demand (pressure falls below the load point pressure), compressor will load at idle speed by
opening the inlet valve. As air demand rises and falls, engine speed is controlled between idle
speed and full load speed to match the required flow while maintaining load point pressure.
Operation - Unloaded
If there is no air demand at idle speed (pressure rises above the unload point pressure), the
compressor will unload by closing the inlet valve. The compressor then runs at idle speed
unloaded with no air delivery. If air demand increases (pressure falls below the load point
pressure), the compressor reloads to meet the required air demand.

Shutdown

1. Close the Service Valve(s).
2. Move the Main Control Switch to the ON position (first position).
3. Allow the compressor to run at idle speed for 3 minutes to allow cool-down.
4. The ViewPort will remain active and display a 3 minute countdown timer.
Operating parameters and any active diagnostic codes may be viewed, if
desired.
5. Move the Main Control Switch to the OFF position after the 3 minute cool-down
is complete and engine stops. This will shutdown the ViewPort and compressor
control system.
6. In the event of an emergency, the engine can be shutdown immediately with
the Emergency Stop Button.
7. If tank pressure falls below 40 psi during the 3 minute cool-down, the
compressor will shutdown to prevent damage to the airend.
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Operating Instructions