Purpose Of Controls - Sullair LS-10 25HP Operators Manual And Parts Lists

AUTOMATIC OPERATION MODE
In this mode the compressor will start if line pres-
sure (P2) is less than the LOAD parameter. It will
stop if the compressor runs unloaded for the num-
ber of minutes indicated by the UNLD TIM parame-
ter. To put the compressor in automatic mode press
" ". If P2 is already less than LOAD the compres-
sor will start immediately, otherwise the system sta-
tus will indicate STANDBY and the LED marked
AUTO will flash.
If the compressor is already running, but in continu-
ous mode, pressing "
automatic. Pressing "
automatic mode will cause the Supervisor to turn
off the common fault relay, if engaged, and clear
any maintenance indicators.
In automatic mode the compressor can be
stopped manually by pressing "O". Stopping the
compressor using "O" will put the Supervisor in
manual stop mode.
Regardless of whether in "automatic" or "manual"
mode, control of the load solenoid will be based on
the parameters UNLD and LOAD. This operation is
as follows:
P2 > UNLD -- -- > load solenoid turned off
P2 < LOAD -- -- > load solenoid turned on
POWER FAILURE RESTART
If the restart timer (RST TIME parameter) is dis-
abled the compressor will not try to start after a
power up. If this time is set to a value, the machine
will go into standby after power up. When the line
pressure drops below the load setpoint, the restart
5.9 PURPOSE OF CONTROLS -- SUPERVISOR II
CONTROL OR INDICATOR
EMERGENCY STOP SWITCH
DISCHARGE TEMPERATURE PROBE---T1
AIR END DISCHARGE PRESSURE---P1
PACKAGE OUTLET PRESSURE---P2
(Service Line Pressure)
" will switch operation to
" while already running in
timer will start timing. When the timer expires the
machine will start.
SEQUENCING MODES
The following is a brief description of sequencing
modes. For details see the Supervisor II Sequenc-
ing & Protocol Manual (See Recommended Spare
Parts List).
S DISABLED --- Responds to status and
parameter change messages via the
RS485 network but will not respond to
start, stop, load or unload messages.
S REMOTE --- Responds to status and pa-
rameter change messages but will not re-
spond to start, stop, load or unload mes-
sages. The remote inputs and outputs are
enabled (start/stop, load/unload, master/
local).
S SLAVE --- Will respond to all messages,
but will not start or load unless command-
ed to do so by a message. This mode is
used to control the machine from a master
computer.
S HOURS --- Sends status message about
once a second; starts, loads and unloads
machines based on sequencing hours.
S COM ID # --- Sends status message
about once a second; starts, loads and un-
loads machines based on machine COM
ID#.
PURPOSE
Pushing in this switch, found adjacent to the Supervi-
sor, cuts all AC outputs from the latter and de---ener-
gizes the starter. A fault message (E STOP) is dis-
played by the Supervisor until the button is pulled out
and the "O" pad is depressed.
Shuts the compressor down when the compressor
discharge temperature exceeds 240_F (116_C). Con-
tinually monitors air/fluid mixture discharged from the
compressor unit.
Shuts the compressor down when the compressor dis-
charge pressure exceeds P1 MAX. Continually moni-
tors the discharge pressure of the compressor unit. In-
dicates pressure in compressor sump upon start---up to
verify rotor motor rotation.
Continually monitors service line pressure. When line
pressure reaches the UNLOAD setting, the Supervisor
control signals the solenoid valve to unload the com-
pressor.
Section 5
OPERATION
25