Section 7
MAINTENANCE
27
2. Loosen and remove the twelve (12) hex head
3/4" x 2 1/2"capscrews from the cover plate.
3. Lift the cover plate from the sump.
4. Remove the primary and secondary separator
elements.
5. Scrape the old gasket material from the cover
and flange on the sump being careful not to let
the scraps fall in the sump.
6. Inspect the receiver/sump for rust, dirt, etc.
7. DO NOT remove grounding staples from the gas-
kets. DO NOT use any type of gasket eliminator.
Re-insert the separator element with the gas-
kets attached into the sump taking care not to
dent it against the tank opening.
8. Clean the underside of the receiver/sump tank lid
and remove any rust. Paint surface with an
epoxy paint as required.
9. Replace the cover plate, washers and cap-
screws. Torque to 200 ft.-lbs. (272 Nm).
10. Re-connect all piping making sure return line
tubes extend to the bottom or 1/4" (6mm) above
the bottom of the separator element. This will
assure proper fluid return flow to the compres-
sor.
11. Check the return line strainer before re-starting
the compressor.
CONTROL SYSTEM ADJUSTMENT
Refer to Figures 7-6 and 7-7. Prior to adjusting the
control system, it is necessary to determine the
desired operating pressure range and also the
maximum pressure at which your compressor is to
operate. (The pressure must not exceed the maxi-
mum operating pressure which is stamped on the
compressor serial number nameplate). The follow-
ing explanation applies to a typical installation with
a desired operating range of 100 to 110 psi (6.9 to
7.6 bar). This information applies to a compressor
with any other operating range except for the stat-
ed pressures.
With the shut-off valve closed or slightly cracked
open, start the compressor. Observe the line pres-
sure gauge and pressure switch contacts. When
the line pressure reaches the desired unload (max-
imum) pressure, the pressure switch contacts
should open. If the pressure switch contacts DO
NOT open, or they open prior to the desired pres-
sure, the pressure switch setting will require adjust-
ment (refer to Figure 7-6).
PRESSURE RANGE ADJUSTMENT:
1. Remove cover to pressure switch.
2. Turn the range-adjusting screw to the high pres-
sure setting. Turning the screw counterclock-
Figure 7-6 Pressure Switch (P/N 040694)
Figure 7-7 Sullicon Control (P/N 011682-003)
*Repair Kit P/N 250020-353
DO NOT touch the electrical contacts, terminal or
leads with any metallic object. Severe electrical
shock may occur.
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