Doosan NHP10-425WCU-EU-FX-T3, Operation And Maintenance Manual

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Operating & Maintenance Manual Operating Instructions
34
Auto Start/Stop Operation
The NHP1500 compressor may include an Automatic Start/Stop feature as an option from the
factory. This feature is selectable from the USERS MENU under the MAIN MENU on the
Intellisys Controller (See Intellisys Controller Display section). This feature is an extension of
the automatic load/unload described under NORMAL OPERATION section of the manual.
This mode is selectable at any machine state, but is not engaged until the compressor is
started and loaded (Note: The controller display will show Autostart - OFF until the unit is
started and loaded). This mode provides improved fuel economy and automatic start and load
when required.
NOTICE
Set the line pressure to REMOTE or ONBOARD based on your application
prior to using AUTOSTART/STOP. Doosan Portable Power recommends
the use of a check valve and REMOTE PRESSURE in all AUTO START/
STOP applications.
The compressor has two methods of autostart/stop control.
1. AUTO START/STOP - PRESSURE - This mode uses the line pressure either
onboard or remote pressure signal (based on user selected option). When line
pressure drops below AUTO START PRESSURE, the compressor will
automatically start and load.
The compressor will then perform as stated in the Normal Operation Section,
loading and unloading based on customer demand requirements. If the
compressor remains in the unloaded state continuously for a time greater than
AUTOSTOP TIME, the compressor will stop and the display will read Autostart
Engaged, Autostart ON.
If the SETPOINT PRESSURE is changed while AUTO START/STOP is ON,
the RELOAD PRESSURE and AUTO START PRESSURE reset to the default
values. Note: If the user presses the unload button, autostart is suspended until
the load button is pushed. This is true while the unit is running or stopped.
2. AUTO START/STOP - REMOTE - This mode uses a customer-supplied signal
applied to the remote contact closure terminal strip. When the remote signal is
CLOSED, the compressor will automatically start and load. The compressor
will then perform as stated in the Normal Operation section, loading and
unloading based on customer demand requirements. If the contact switch
OPENS, the compressor will unload and wait for the AUTO STOP TIME to
expire.
The compressor will stop and then display will read Autostart Engaged,
Autostart-On. If during the AUTO STOP TIME, the contacts CLOSE, the
compressor will load and perform normal operation.