Sullair ES--6 Series Operator's Manual And Parts List page 25

Figure 6- -6 Air Pressure Switch (P/N 250025- -299)
CONTROL SYSTEM ADJUSTMENT
Ref er t o F igur e 6 -- 6. A ll c om ponent s in t he Cont r ol
System are designed and manufactured to close tol-
erances to eliminate any need for adjustments. The
only adjustment required is to set the air pressure
switch. This is done by following the instructions be-
low.
1. Remove the pressure switch cover.
2. With the shut--off valve closed or slightly cracked
open, start the compressor.
3. Observe the line pressure gauge and pressure
switch contacts. When the line pressure reaches
nameplate pressure, the pressure switch con-
tacts should open.
4. If the pressure switch contacts do not open or
they open prior to the desired pressure, the pres-
sure switch setting will require adjustment (refer
to Figure 6--6). To adjust the pressure switch,
turn the range--adjusting screw to the high pres-
sure setting. Turning the screw counterclockwise
lowers both the high and low pressure setting
equally.
FOR DIFFERENTIAL ADJUSTMENT OF AIR
PRESSURE SWITCH:
Differential is the difference between the high and
low pressure settings.
Turning the screw clockwise increases the differen-
tial, and counterclockwise decreases the differential
pressure.
MAINTENANCE
DANGER
!
DO NOT touch the electrical contacts, terminal or
leads with any part of the body or any uninsulated
metallic object. Severe electrical shock may oc-
cur.
UNLOADER SOLENOID VALVE MAINTENANCE
Unloader valve maintenance is minimal, but a peri-
odic cleaning is desirable. The time between clean-
ings will vary depending on operating conditions. In
general, if the voltage to the coils is correct, sluggish
valve operation or excessive leakage will indicate
that cleaning is required.
WARNING
!
Turn off all power, relieve sump pressure, and dis-
connect coil lead wires to the solenoid valve be-
fore making repairs.
It is not necessary to remove the valve from the pipe
line for repairs.
DISASSEMBLY AND REASSEMBLY
1. Remove the retaining cap and slip the entire sole-
noid off the solenoid base subassembly.
2. Unscrew the solenoid base assembly. Remove
the core assembly, core spring and body gasket.
3. All parts are now accessible for cleaning or re-
placement.
4. Reassemble in reverse order of disassembly.
Section 6
19