25
Compressor Timer Setpoints
·
Capacity Decrease At Start
– At compressor
startup, the capacity motor is held at minimum
position for this time period. After the timer
expires, the slide is free to move in accordance
to the system demands.
·
Compressor Starter Auxiliary Contact Bypass
–
This timer is used to bypass the motor amperage
input at start. After the timer times out, the
program determines if the motor starter has
pulled in by testing the amperage channel. If
the program determines that the starter did not
“pull in”, then the compressor will fail on “Motor
Starter Fail” message.
·
Volume Slide Adjustment Timer
– This timer
determines the intervals the volume slide is
adjusted. If the volume slide is between 2½% &
7% away from the desired volume ratio, the mo-
tor is pulsed once toward the desired volume.
If the volume slide is more than 7% away from
the desired value, the volume slide motor is
continuously energized until the valve is within
2½% of the desired value. If the actual position
is within 2½% of the desired value, no adjust-
ment will be made.
·
Minimum Compressor Prelube Timer
– This is
the length of time the oil pump will run after
establishing the Prelube Oil Pressure, to prime
oil circuit before starting the compressor.
·
Oil Pressure Bypass At Compressor Start
– This
timer bypasses the Low Oil Pressure limits.
The timer starts when the compressor starts.
After the timer has cycled, the Low Oil Pressure
setpoint is active.
·
Prelube Oil Pump Time Limit
– This timer puts
a limit on how long the prelube oil pump is al-
lowed to run without establishing the Prelube
Oil Pressure.
To change a timer set-
ting, a user with high
access level must be
logged on.
Содержание VSG & VSSG
Страница 1: ...1 VSG VSSG Single Screw Compressor Software Manual Compact Logix PLC ...
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Страница 21: ...21 Discharge Pressure Control There are three options for the Compressor Control Setpoints ...
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Страница 67: ...67 Captured Data at Shutdown The Captured at Shutdown screen shows data captured prior to compressor shutdown ...
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