Alternate Control Features And Functionality - Ingersoll Rand X8I Mode D'emploi

The 'Insufficient Capacity' advisory alarm is intended as an
advanced warning and is not recorded in the fault history
log but is included as a Group Alarm (Warning), or Group
Fault item.
'Insufficient Capacity' is available as a dedicated data
communications item.
The 'Insufficient Capacity' advisory alarm function
can be de-activated. In this instance the unit's Alarm
indicator will still illuminate but no group alarm, group
fault, or a remote indication is generated.
Restricted Capacity Alarm
The X8I is equipped with a dedicated 'Restricted Capacity'
Advisory Alarm (Warning) indication.
This indication will flash if all available compressors are
loaded and further capacity is required but one or more,
compressors are: 21
a) inhibited from use in a 'Table' priority setting
b) inhibited from use by the short-term Service/
Maintenance function
c) inhibited from use in the long term maintenance menu.
The 'Restricted Capacity' advisory alarm is intended to
indicate that all available compressors are already loaded
and further capacity is required but one or more, system
compressor(s) have been restricted from use.
The 'Restricted Capacity' advisory alarm is not recorded
in the fault history log but is included as a Group Alarm
(Warning), or Group Fault item.
'Restricted Capacity' is available as a dedicated data
communications item.
The 'Restricted Capacity' advisory alarm function can
be de-activated. In this instance the unit's Alarm indicator
will still flash but no group alarm, group fault, or a remote
indication is generated.
ALTERNATE CONTROL FEATURES AND
FUNCTIONALITY
Energy Control Mode (ENER) is the STANDARD control
mode of the X8I. Alternate control strategies of the X8I are
the basic FILO (First in / Last Out) and EHR (Equal Hours
Run) EHR
FILO: TIMER ROTATION MODE
The primary function of Timer Rotation mode is to
efficiently operate a compressed air system consisting of
fixed capacity output compressors. The routine rotation
assignments can be modified using 'Priority' settings
to accommodate for a differentially sized or variable
capacity output compressor(s).
Rotation:
Each time the rotation interval elapses, or the rotation
time is reached, a sequence rotation occurs and the
sequence assignment for each compressor is re-arranged.
The compressor that was assigned for duty (A) is re-
assigned as last standby (D) and all other compressor
assignments are incremented by one.
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The sequence assignment pattern can be modified by
'Priority' settings.
Tables; Priority Settings
Control:
Compressors are utilized, in response to changing
demand, using a 'FILO' (First In, Last Out) strategy.
The 'duty' compressor (A) is utilized first followed by (B)
if demand is greater than the output capacity of (A). As
demand increases (C) is utilized followed by (D) if demand
increases further.
As demand reduces (D) is the first compressor to be
unloaded, followed by (C) and then (B) if demand
continues to reduce.
The last compressor to be unloaded, if demand reduces
significantly, is (A). The compressor assigned as (A) in
the sequence is the first to be loaded and the last to be
unloaded.
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