Inlet Control Valve - Sullair ES-8-15L Operator's Manual And Spare Parts List

Section 8
MAINTENANCE
Figure 8-6 Hub Separation
wrenches. All ES-8 compressors are flange-
mounted to the motor making them self-aligning,
eliminating the need for alignment procedures.
Proper hub separation is shown in Figure 8-6.

INLET CONTROL VALVE

Refer to Figure 8-7. The inlet control valve normal
maintenance requires only the replacement of the o-
rings. Use repair kit no. 02250050-614 and follow
the procedure below for proper disassembly and as-
sembly procedures.
Before doing compressor maintenance, discon-
nect compressor from power source and lock out
power source. Isolate compressor from line pres-
sure by closing recommended discharge shut-off
valve and releasing all internal pressure from
compressor.
Assure that line pressure gauge on compressor
indicates "ZERO" pressure before any work is
done. Failure to comply can cause injury.
1. Remove the two (2) rear access panels which
cover the inlet valve assembly.
2. Identify and tag the plastic lines connected to the
blowdown valve and disconnect.
30
WARNING
!
WARNING
!
3. Remove the 3 capscrews from the inlet valve
cover.
4. Remove cover (with blowdown valve attached)
and o-rings.
5. Remove piston, piston spring, check spring and
valve stem.
6. Inspect and clean all parts.
7. Assemble valve stem, check spring, piston
spring and piston into inlet valve housing.
8. Lubricate new o-rings and install the inner and
outer o-rings onto cover.
9. Position cover in inlet valve housing and install
capscrews. Tighten capscrews to 6 ft.-lbs.
(8.1Nm).
10. Reconnect the plastic lines to the appropriate fit-
tings on the valve.
11. Assemble two (2) rear access panels on the
compressor.
12. Start compressor and check for leaks.
CONTROL SYSTEM
TRO-MECHANICAL
Refer to Figure 8-8. Prior to adjusting the Control
System, it is necessary to determine the desired op-
erating pressure range and also the maximum pres-
sure at which your compressor is to operate. The
pressure must not exceed the maximum operating
pressure which is stamped on the compressor serial
number nameplate. The following explanation ap-
plies to a typical installation with a desired operating
range of 100 to 110 psig (6.9 to 7.6 bar). This in-
formation will apply to a compressor with any other
operating range excepting the stated pressures.
Remove the cover of the pressure switch. With the
shut-off valve closed (or slightly cracked open) start
the compressor. Observe the line pressure gauge
and pressure switch contacts. When the line pres-
sure reaches 110 psig (7.6 bar), the pressure switch
contacts should open. If the pressure switch con-
Figure 8-7 Inlet Control Valve
* Repair Kit P/N 02250050-614
ADJUSTMENT- ELEC-