Differential Pressure Regulator Adjustment; Drive Coupling Installation And Alignment - Sullair LS20T Operator's Manual And Parts List

Figure 7-6 Drive Coupling
assembly is attached to the separator tank lid. Oil
return/sight glass maintenance should be per-
formed on a routine basis parallel to that of the fluid
filter, or as indicated in the Troubleshooting Section
of this manual.
For additional information, consult the Trouble-
shooting Section in the Supervisor Controller
manual.
The maintenance on an oil return/sight glass is
mainly concerned with the condition of the filter
assembly. Order filter assembly no. 02250117-782,
and use the following instructions as a guide.
1. Disconnect the tubes at the tops of the sight
glass assemblies.
2. Unscrew male connector (for left-side glass), or
the straight thread tube connector (for right-side
glass) from sight glass/orifice blocks.
3. Remove used filter assembly, and replace with
new assembly.
4. Coat/lubricate the o-rings will silicone grease.
5. Reattach the connectors to the sight glass/orifice
blocks.
DIFFERENTIAL PRESSURE
ADJUSTMENT
Refer to Figure 7-5 and 7-6. The differential pres-
sure regulators are adjusted by loosening the
adjusting screw on the end of the cone-shaped
cover of the pressure regulator. When the jam nut
is loose, turn the adjusting screw clockwise to
increase or counterclockwise to decrease the set-
ting.
The unload pressure regulator should be set at 150
psig (10.3 bar) to control the compressor package
during unload only. The inlet poppet valve control
pressure regulator should be set to control the sys-
tems modulation to the service line desired pres-
sure.
DRIVE COUPLING INSTALLATION AND ALIGN-
MENT
Units mounted through common housing
self-aligning. If alignment is suspect, consult
Service Department.
Figure 7-6 shows layout view of drive sleeve and
coupling hubs.
Section 7
MAINTENANCE
REGULATOR
are
35