Gardner Denver PUREAIR EWC99C, Руководство по эксплуатации и обслуживанию

Страница: 28 / 69

13-11-607 Page 23
4. In the top line, “ LAG START DELAY ” is displayed. The bottom line will indicate a number in the
range of 15 to 600 seconds. It is factory set at 30. This is the length of time this machine will wait
before starting when the pressure drops below the load point. This should be set to the same value
for all sequenced units. Its setting will depend on the amount of air storage volume in the system.
Too small a number will result in more compressors being started than is necessary to satisfy the
demand.
5. This completes the sequence adjustments. The controller will return to the main adjustments menu.
Configuration Adjustments
1. In the top line, “ HI SYS PRES LIM ” is displayed. The bottom line will indicate a value that is factory
set 20 - 25 PSI above name plate. This is the pressure that will cause a shutdown if exceeded due
to a malfunction such as a stuck inlet valve or broken control line. This should be set at or slightly
below the rating of the pressure relief valve. The controller will attempt a number of actions as it
approaches to prevent the pressure from reaching this limit.
2. In the top line, “ REMOVE SYS PRESS ” is displayed. The bottom line displays the current pressure
being sensed at the package discharge. At this point, steps must be taken to ensure that system
pressure is, in fact, zero psig. Remove the line to the system pressure transducer. Pressing
[ENTER] will now cause the AUTO SENTRY W to calibrate the transducer output to zero PSIG.
Obviously, pressure measurement errors will be encountered if ’zeroing’ is done with pressure at the
transducer. If large errors are detected, the controller will demand that the transducer be checked.
3. In the top line, “ REMOVE RES PRESS ” is displayed. The bottom line displays the current pressure
being sensed in the reservoir. The reservoir pressure transducer may now be ’zeroed’ by following
the steps outlined in 2 above.
4. In the top line, “ REMOVE INJ PRESS ” is displayed. The bottom line displays the current pressure
being sensed in the water line. The water injection pressure transducer may now be ‘zeroed’ by
following the steps outlined in #2 above.
5. This completes the configuration adjustments. The controller will return to the main adjustments
menu.
Unit Setup Adjustments
1. In the top line, “ RELUBE INTERVAL ” is displayed. The bottom line will indicate a time interval of
1000 to 2000 hours. After the machine has run for the programmed setting, an advisory will be
displayed, requesting relubrication. Adjust as desired and press [ENTER] to proceed.
2. In the top line, “ OVER TEMP LIMIT ” is displayed. The bottom line will indicate 150
°
F. This is the
maximum (and proper) setting for compressor operation. It may be temporarily lowered to verify the
function of the temperature shutdown system.
3. In the top line, “ AUTO RESTART ” is displayed. The bottom line will indicate either ”OFF” or ”ON”
The factory setting is ”OFF”, and the controller will display a power failure shutdown after power has
been restored.
Set this feature to ON when it is necessary to have the compressor automatically restart after a
power interruption. There will be a brief delay, then the control resumes the mode it was in prior to
the interruption. This feature shall only be enabled when the owner determines that it is safe to do
so. It is recommended that compressor access be limited to only trained service personnel when
this feature is used.