Purpose Of Controls; Initial Start-Up Procedure; Subsequent Start-Up Procedure; Shutdown Procedure - Sullair ES-8-15L Operator's Manual And Spare Parts List

Section 6
COMPRESSOR OPERATION-
ELECTRO-MECHANICAL
7.2 PURPOSE OF CONTROLS- ELECTRO-MECHANICAL (CONTINUED)
CONTROL OR INDICATOR
PRESSURE REGULATOR
COOLER BYPASS VALVE
MINIMUM PRESSURE/CHECK VALVE
PRESSURE RELIEF VALVE
MODULATING INLET VALVE
SOLENOID VALVE
PRESSURE SWITCH
BLOWDOWN VALVE

7.3 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. Be sure that all preparations and checks de-
scribed in the Installation section have been
made.
3. Crack open the shut off valve to the service line.
4. Start the compressor by turning the START/
RUN/STOP selector switch to the "I" (START)
position momentarily and release..
5. Check for possible leaks in piping.
6. 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.
26
PURPOSE
Opens a pressure line between the sump and air inlet
valve allowing the inlet valve to regulate air delivery ac-
cording to demand.
Regulates flow of fluid to and around the cooler.
Designed to maintain a minimum operating
temperature of 180°F (82°C); used for fast
warm-up on start-up.
Maintains minimum of 60 psig (4.1 bar) in the compres-
sor sump. Valve piston restricts receiver air discharge
from receiver/sump when pressure falls to 60 psig (4.1
bar). Also incorporated in this valve is a terminal check
valve which prevents line pressure backflow into the
sump during unload conditions and after shutdown.
Protects compressor by venting compressed air in ex-
cess of 200 psig (13.8 bar) to atmosphere.
Regulates the amount of air allowed to enter the air
compressor. This regulation is determined by the
amount of air being used at the service line. Also acts
as a check valve to prevent reverse compressor rota-
tion at shut down.
Bypasses the pressure regulator valve causing the in-
let valve to close when the compressor reaches maxi-
mum operating pressure. Also activates blowdown
valve.
Senses service line pressure. When line pressure
reaches maximum setting the pressure switch signals
the solenoid valve to unload the compressor.
Vents sump pressure to the atmosphere during unload
conditions and shutdown.
7. Observe the operating temperature. If the operat-
ing temperature exceeds 200°F (93°C), the cool-
ing system or installation environment should be
checked.
8. Observe maintenance indicators.
9. Open shut-off valve to service line.
10. Re-inspect the compressor for temperature and
leaks the following day.

7.4 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"
START position momentarily and release. When
the compressor is running, observe the instrument
panel and maintenance indicators.

7.5 SHUTDOWN PROCEDURE

To shut the compressor down, simply turn the selec-
tor switch to the "O" STOP position.