Control System Adjustment; Pressure Switch Adjustment; Pressure Regulator Adjustment - Sullair ES-6 SERIES User Manual

Section 6 - MAINTENANCE
1. To prevent spillage and loss of re-usable fluid,
place a contaminate-free fluid receptacle
beneath fluid drain valve and fluid filter.
2. Drain fluid by removing fluid drain cap at tee
located beneath compressor.
3. Unscrew and remove hollow hex plug.
4. Remove spring and piston.
5. By using long nosed pliers, pull the actuator
out.
6. Install new actuator.
7. Install piston and spring with centering guide.
8. Re-install plug.
9. Refill compressor with fluid before operating
Figure 6-5 Thermostat Actuator (P/N 250025-413)
1. Thermostat 3. Pin
Actuator (I)
2. Piston 4. O-ring
(I) Repair Kit P/N 250028-036

CONTROL SYSTEM ADJUSTMENT

Refer to Figure 6-6. All components in the Control
System are designed and manufactured to close
tolerances to eliminate any need for adjustments.
The only adjustment required is to set the air
pressure switch and pressure regulator valve. This
is done by following the instructions below.
DANGER
DO NOT touch the electrical con-
tacts, terminal or leads with any part
of the body or any uninsulated metal-
lic object. Severe electrical shock
may occur.
41
5. Plug 7. Spring
6. Guide

PRESSURE SWITCH ADJUSTMENT

1. lose ball valve to isolate the pressure regulator
valve and set selector switch to manual.
2. Remove the pressure switch cover.
3. With the shut-off valve closed or slightly
cracked open, start the compressor.
4. Observe the line pressure gauge and pressure
switch contacts. When the line pressure
reaches nameplate pressure, the pressure
switch contacts should open.
5. f the pressure switch contacts do not open or
they open prior to the desired pressure, the
pressure switch setting will require adjustment
(refer to Figure 6-6). To adjust the pressure
switch, turn the range adjusting screw to the
high-pressure setting equally.
6. Replace pressure switch cover.
Figure 6-6 Air Pressure Switch (P/N 250025-299)
1. Contact #2 3. Pressure Range
Screw
2. Differential 4. Contact #1
Screw
PRESSURE REGULATOR ADJUST-
MENT
1. Establish correct pressure switch adjustment
by following the above procedure.
2. Lower line pressure by opening the shut-off
valve until the compressor reloads.
3. Loosen the pressure regulator locknut and
open ball valve.
4. Close shut-off valve; the pressure will increase
depending on the setting of the regulator
adjustment screw. Tighten adjustment screw
ES-6 USER MANUAL
5. Ground
Screw
6. Optional
Ground