X8I Compressor Connectivity And Functional Settings - Ingersoll Rand X8I Mode D'emploi

X8I COMPRESSOR CONNECTIVITY AND
FUNCTIONAL SETTINGS
1
Compressor Connectivity:
ir-PCB Fixed speed, load/unload; connected to X8I using
'ir-PCB' module using 6-wire method.
(0/100%) 0% or 100% regulation
IRV-PCB Variable Speed; connected to X8I using 'ir-PCB'
module using the 7-wire 'V' terminal method.
(variable speed regulation)
IR-485 Fixed speed, load/unload; connected to X8I on
IR485 network.
(0/100%) 0% or 100% regulation
IRV-485 Variable Capacity/Speed; connected to X8I on
IR485 network.
(0 . . 100%) variable %Load regulation
2
Compressor Start Sequence Time:
Set to match the time that the compressor takes to
start it's main motor and load. This time will typically be
equivalent to the compressors 'Star/Delta' time.
If unknown, the time can be established by experiment;
manually start the compressor, from a stopped condition,
and determin the time from pressing the start button
until the compressor loads and contributes capacity
output to the system.
This time is used by the unit for 'staggered starting' of
multiple compressors and other operational calculations.
An accurate time is important for successful unit
operation.
3
Compressor Run-On Stop Time:
This setting is only applicable to 'IRV-PCB'
connectivity and is not displayed for other connectivity
options.
The time that the compressor main motor will continue to
run when the compressor is offload (main motor run-on-
time).
If unknown, the time can be established by experiment;
start and load the compressor then arrange a condition
that will unload the compressor for a period of time.
Determine the time from the moment the compressor
unloads until the main motor stops and the compressor
enters a 'Standby' or 'Auto Restart' condition.
This time is used by the X8I for accurate recording
of 'run hours' (EHR mode), operational calculations and
other data recording applications. An accurate time is
important for successful X8I operation.
4
ir-PCB Alarm (Warning) Input:
Only applicable for ir-PCB connectivity. Not shown
for '485' network types.
For 'ir-PCB' connectivity applications the voltage
detection function for the 'ir-PCB' Alarm (Warning) input
can be inverted.
+V=! An Alarm (Warning) condition is generated if the 'ir-
PCB' Alarm input detects a voltage between 12-250Vac/dc
(default).
0V=! An Alarm (Warning) condition is generated if the 'ir-
PCB' Alarm input detects no voltage.
% Maximum Output Capacity
The maximum output capacity of each compressor must
be set as a percentage with reference to the highest
output capacity (the largest) compressor in the system.
The highest output capacity compressor must be
assigned with 100% capacity. Equal capacity (equal sized)
compressors should be assigned the same % capacity
value. Calculate the output capacity of compressor(s) that
are smaller than the largest in the system as a percentage
of the largest in the system.
For example:
Compressor 1 700 cfm 100%
Compressor 2 700 cfm 100%
Compressor 3 420 cfm 60%
Compressor 4 420 cfm 60 %
Compressor 5 350 cfm 50%
Compressor 6 175 cfm 25%
% Minimum Output Capacity
Only applicable for a variable output compressor
(IRV-485). Not shown for other types.
The minimum output capacity of a variable output
compressor must be set as a percentage of the
compressor's maximum output scaled in accordance
with the % maximum capacity output value. Minimum
output capacity is regarded as the output capacity at the
lowest possible speed (variable speed compressor) or the
minimal output achievable (stepping or other variable
regulation control).
For example 1:
For a variable speed compressor that has been assigned
a maximum capacity output percentage of 100%, and is
able to reduce speed to 30% of maximum speed:
Minimum Output Capacity = 30% (related to the largest
capacity)
Example Compressor 1 is a VSD:
Max CFM = 700
Max Output Capacity 700/700 = 100%
Min CFM = 210 (30% or 700 x .30)
Min Output Capacity 210/700 = 30% (or 30% x 100% =
30%)
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