Section 5
COMPRESSOR OPERATION
19
5.2 PURPOSE OF CONTROLS -- STANDARD (CONTINUED)
CONTROL OR INDICATOR PURPOSE
PRESSURE SWITCH Senses service line pressure. When line pressure
reaches maximum setting the pressure switch signals
the solenoid valve to unload the compressor.
BLOWDOWN VALVE Vents sump pressure to the compressor inlet during
unload conditions and shutdown.
5.3 INITIAL START--UP PROCEDURE
The following procedure should be used to make the
initial start--up of the compressor:
1. Read the preceding pages of this manual thor-
oughly.
2. Jog motor to check for correct rotation of motor.
3. Be sure that all preparations and checks de-
scribed in the Installation section have been
made.
4. Crack open the shut off valve to the service line.
5. Start the compressor by turning the START/RUN/
STOP selector switch t o the
“I” (START)
posi-
tion momentarily and release..
6. Check for possible leaks in piping.
7. Slowly close the shut--off valve and check that the
setting on the pressure switch is set correctly. If
set correctly, the compressor will unload at the
desired unload pressure. If adjustments are nec-
essary, see Control System Adjustments in the
Maintenance Section of the manual.
8. Observe the operating temperature. If the operat-
ing temperature exceeds 200
_
F(93
_
C), the
cooling system or installation environment
should be checked.
9. Observe maintenance indicators.
10. Open shut--off valve to service line.
11. Re--inspect the compressor for temperature and
leaks the following day.
5.4 SUBSEQUENT START--UP PROCEDURE
On subsequent start--ups, check that the proper lev-
el is visible in the fluid sight glass and turn the
START/RUN/STOP selector switch to the ”I”
STAR T position momentarily and release. When the
compressor is running, observe the instrument pan-
el and maintenance indicators.
5.5 SHUTDOWN PROCEDURE
To shut the compressor down, simply turn the selec-
tor switch to the “O” STOP position.
5.6 GENERAL INTRODUCTION- SUPERVISOR II
Reference Supervisor II Section 6. While Sullair has
built into this compressor a comprehensive array of
controls and indicators to assure you that it is oper-
ating properly, you will want to recognize and inter-
pret the reading which will call for service or indicate
the beginning of a malfunction. Before starting your
Sullair compressor, read this section thoroughly and
familiarize yourself with the controls and indicators --
their purpose, location and use.
5.7 SUPERVISOR II PARAMETER SETUP
Pressing the program key enters parameter display
and edit mode. To move to the next parameter press
the program key. To increment a parameter press
the up arrow key or logo key. The logo key will incre-
ment by 10. To decrement the value press the down
arrow key.
The parameters are displayed in the following order:
S
Unload pressure
-- The pressure where
the machine is unloaded. For example if
this parameter is set to 110 psi (7.6 bar) the
machine will unload when the line pressure
is above 110 psi (7.6 bar).
UNLOAD
100 PSI
S
Load differential
-- The pressure differen-
tial below the unload pressure where the
machine is loaded. For example, if the un-
load pressure is set to 110 psi (7.6 bar) and
the load differential is set to 10 psi (.7 bar),
the machine will load when the line pres-
sure goes below 100 psi (6.9 bar).
LOAD
10 PSI
S
P1 Max
-- Maximum sump pressure. An
alarm and shut down will occur when the
sump pressure rises above this pressure.
P1 MAX
135 PSI
S
Wye to delta transition timer
-- F o r f u l l
voltage starters this parameter is set to 0.
WYE DELT
10 SEC
S
Restart time
-- Time to wait after power up
before starting machine. This parameter is
used to keep several machines from start-
ing at the same time after power up, or to
delay start until other equipment is started.
If disabled the machine will not automatical-
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