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

Figure 7-5 Pressure Regulator Adjustments
4. Coat/lubricate the o-rings with compressor fluid.
5. Reattach the connectors to the sight glass/orifice
blocks.
DIFFERENTIAL PRESSURE
ADJUSTMENT
Refer to Figure 7-5. The differential pressure regu-
lators are adjusted by loosening the adjusting screw
on the end of the cone-shaped cover of the pres-
sure regulator. When the jam nut is loose, turn the
adjusting screw clockwise to increase or counter-
clockwise to decrease the setting.
The reference pressure regulator should be set to
maintain a 60 psig (4.14 bar) downstream pressure
to the inlet poppet valve. The unload pressure reg-
ulator should be set at 170 psig (11.7 bar) to control
the compressor package during unload only. The
inlet poppet valve control pressure regulator should
be set to control the systems modulation to the
service line desired pressure.
DRIVE COUPLING INSTALLATION AND ALIGN-
MENT
Units mounted through common housing are self-
aligning. If alignment is suspect, consult Service
Department.
Figure 7-6 shows layout view of drive sleeve and
coupling hubs.
Figure 7-6 Drive Coupling
Section 7
MAINTENANCE
REGULATOR
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