Gardner Denver ELECTRA-SAVER EAYQ E, Руководство по эксплуатации и обслуживанию

Страница: 33 / 75

13–10–613 SP Page 24
terval (see UNIT SETUP) if service was per-
formed early. Press again to change back to re-
maining time. When the desired value is shown,
press [ENTER] to save and proceed.
If the advisory message is on, it must be cleared
as noted in step 1.
4. This completes the maintenance adjustments.
The controller will return to the main adjustments
menu.
Sequence Adjustments
See “SEQUENCING COMPRESSORS WITH THE
AUTO SENTRY–ES+”, page 26, for more details on
setting up and optimizing a sequenced compressor
installation.
1. In the top line, “NUM OF SEQ UNITS” is dis-
played. The bottom line will indicate a number in
the range of one through eight. This will be factory
set at “1”. This should be set to a number corre-
sponding to the number of compressors that are
currently installed on this air system that also have
AUTO SENTRY–ES+ controllers. It should be
noted that all AUTO SENTRY–ES+ compressors
on the system must have the same number pro-
grammed here to operate correctly in SE-
QUENCE mode. Adjust as required, and press
[ENTER] to proceed.
Setting the value in step 1 to one indi-
cates that no sequencing is to take
place. Consequently, steps 2, 3, and 4,
which relate to sequencing, are
skipped by the “AUTO SENTRY
–
ES+”; the controller will return to the
main adjustments menu.
2. In the top line, “UNIT NUMBER” is displayed. The
bottom line will again indicate a number of one
through eight and is factory set at “1”. Enter a dif-
ferent number for each “AUTO SENTRY–ES+” in
a sequenced system. The sequence mode will
not function properly if two or more compressors
have the same UNIT NUMBER. Example: 1, 2,
and 3 for a three compressor installation.
This is the only setting which must be different for
each member of a sequenced system. All other
settings should normally be the same for all mem-
bers.
3. In the top line, “TRANSFER INTERVAL” is dis-
played. The bottom line will indicate a number of
hours in the range of 1 to 5000. It is factory set at
24. This is the number of hours that this machine
will stay in the role of “lead” compressor.
Normally it is desirable to set this to the same val-
ue on all sequenced units to equalize running
hours. Different values may be programmed, if
desired, to help equalize hours.
4. In the top line, “LAG START DELAY” is displayed.
The bottom line will indicate a number in the range
of 1 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 reset
point. This delay period begins when a previous
member of the system is loaded. 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 re-
sult in more compressors being started than is
necessary to satisfy demand.
5. The controller displays “BAUD RATE” on the top
line, and a selection between “1200” or “9600” on
the lower line. The controller can operate at either
speed. Select the desired value, and press [EN-
TER].
6. 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 slight-
ly below the rating of the pressure relief valve. The
controller will attempt a number of actions as it ap-
proaches to prevent the pressure from reaching
this limit.
The controller will automatically ad-
just the set and reset pressures as re-
quired if this limit is lowered.
2. In the top line, “REMOVE SYS PRESS” is dis-
played. The bottom line displays the current pres-
sure being sensed at the package discharge. At
this point steps must be taken to ensure that sys-