Pressure Regulator Adjustment; Drive Coupling Installation And Maintenance - Sullair LS-100L Operator's Manual

Section 7
MAINTENANCE
Figure 7-5 Drive Coupling "Hub" Gap Check
TABLE 1 INSTALLATION DATA
SERIES 10 (25-40HP/ 18-30KW)
Horsepower Coupling
Element
25 & 30 HP/ 04567
18 & 22 KW
60, 75, 100 250004-638
(45, 55, 75 KW)
plete, the pressure regulator should be adjusted
for the pressure at which modulation of air deliv-
ery should begin. In this case that pressure will
be 126 psig (8.7 bar). The regulator is adjusted
by loosening the jam nut 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 setting.
3. To set the regulator, continue closing the service
valve until the line pressure is 126 psig (8.7 bar).
At this point regulator should pass a signal to the
inlet valve to start closing it. If the line pressure
keeps on rising or if the modulation does not
begin, adjust the regulator valve as described
above. After adjustment, line pressure should be
approximately 126 psig (8.7 bar) and 1.00 in. Hg
(2.54 cm Hg.) vacuum below the inlet.
4. Next, close the service valve; line pressure will
start rising. When line pressure reaches 135
psig (9.3 bar), the inlet valve will be closed to its
maximum position. The inlet vacuum at this
point will be around 25 in. Hg (63.5 cm Hg.). The
machine should unload at this point.
5. Open the service valve so the line pressure is
125 psig (8.6 bar). Machine is now set for oper-
ation. Recheck the unload pressure by closing
of the service valve. Machine should unload via
the pressure switch at 135 psig (9.3 bar).
After the control pressures have been adjusted, the
42
Coupling Tightening
Hub Gap Torque (Wet)
2 .09-.125 in 55 ft.-lbs
2.4-3.2 mm (75Nm)
.09-.125 in 110 ft.-lbs
2.4-3.2 mm (149Nm)
"unloaded" sump pressure should be checked. It
will be necessary to shut the compressor down,
remove the pressure switch cover, and disconnect
one of the two lead wires that are connected to the
micro-switch (contact block). After disconnecting
the lead, tape the exposed wire with electrician's
tape to make sure that it does not come in contact
with any metallic surface.
DO NOT touch the electrical contacts, terminal or
leads with any metallic object. Severe electrical
shock may occur.
With the lead taped, you may start the compressor
again. Allow the sump pressure to stabilize.
The sump pressure should read 23 to 28 psig (1.6
to 1.9 bar).
Once this is checked, shut the compressor down
once again and reconnect the taped lead and
replace the pressure switch cover. At this time, start
the compressor and cycle the Control System sev-
eral times and re-check all pressure settings and
adjustments.
DO NOT touch the pressure switch, electrical con-
tacts, terminal board or leads with any part of the
body or any un-insulated metallic object. Severe
electrical shock may occur.

PRESSURE REGULATOR ADJUSTMENT

Start the compressor and adjust the service valve to
maintain service air pressure at three psig above
the rated pressure (126 psig for example). Turn the
adjusting screw on the regulator until air just begins
to escape from the control air orifice. The regulator
is now properly set.
DRIVE COUPLING INSTALLATION AND MAIN-
TENANCE
Refer to Figure 7-5. For coupling installation and
maintenance the tools required will be a measuring
scale, one set of standard Allen wrenches, and one
set of standard socket wrenches.
For installation and maintenance of the drive cou-
pling, follow the steps explained below.
Disconnect all power at source, before attempting
maintenance or adjustments.
STEP 1 - COUPLING GUARDS
There are three 5/16" screws from each of the wire