Sullair ES-6 Series User Manual page 73

SECTION 6
F D A
OR IFFERNTIAL DJUSTMENT OF
S
WITCH
Differential is the difference between the high and
low pressure settings.
Turning the screw
differential, and counterclockwise decreases the
differential pressure.
DANGER
DO NOT touch the electrical contacts, ter-
minal or leads with any part of the body or
any uninsulated metallic object.
Severe electrical shock may occur.
U S V
NLOADER OLENOID ALVE
Unloader valve maintenance is minimal, but a
periodic cleaning is desirable. The time between
cleanings will vary
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 disconnect coil lead wires to the
solenoid valve before making repairs.
It is not necessary to remove the valve from the pipe
line for repairs.
Table 6-2: Modulating Control Pressure Settings
PRESSURE SWITCH SETTING
250025-299
Press Switch Press Switch
Opening PSIG/ Closing PSIG/
BAR
100/6.9
125/8.6
150/10.3
175/12.1
A P
IR RESSURE
clockwise increases
M
AINTENANCE
depending on operating
Rising Pressure (PSIG/BAR)
Start Unloading
BAR
70/4.8 87/6
95/6.6 112/7.7
120/8.3 137/9.4
145/10 162/11.2
D
ISASSEMBLY AND
1. Remove the retaining cap and slip the entire
solenoid off the solenoid base subassembly.
2. Unscrew the
the Remove the core assembly, core spring and
body gasket.
3. All parts are now accessible for cleaning or
replacement.
4. Reassemble in reverse order of disassembly.
CO R
IL EPLACEMENT
1. Remove the retaining cap, nameplate and
cover.
2. Slip the yoke containing the coil and sleeves
off the solenoid base subassembly.
3. Reassemble in reverse order of disassembly.
Before doing compressor maintenance,
disconnect compressor from power source
and lock out power source. Isolate
compressor from line pressure by closing
recommended discharge shut-off valve and
releasing all internal pressure from
compressor.
I C V
NLET ONTROL ALVE
Refer to Figure 6-7. The only parts which normally
require replacement are the piston seal on the intake
valve piston and gasket. Follow this procedure for
inlet control maintenance.
MODULATING CONTROL VALVE 250017-280
Fully Unloaded Start Unloading
95/6.6
120/8.3
145/10
170/11.7
ES-6 USER MANUAL
R
EASSEMBLY
solenoid base assembly.
WARNING
Falling Pressure (PSIG/BAR)
Fully Unloaded
93/6.4 85/5.9
118/8.1 110/7.6
143/9.9 135/9.3
168/11.6 160/11
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