ELGi EG 22 - Page 41

6.9
Maintenance
to the compressor.
 Close the discharge end ball valve.
 Release air oil tank pressure and allow the tank to cool
for a few minutes.
Requirements
 Pliers, screw driver, new thermal valve element, new O-
ring.
Procedure
Replacing thermal Valve
 Remove the thermal valve element from the thermal
valve block body
 Inspect and clean seating area in the housing
 Replace with a new thermal valve.
6.1.2.10 Electric motor greasing
Pre work
 Switch off the compressor and disconnect power supply
to the compressor.
 Close the discharge end ball valve.
 Release air oil tank pressure and allow the tank to cool
for a few minutes.
Requirements
 Recommended grease, cleaning cloth, grease gun.
Procedure
 Stop the motor and lock out the switch.
 Thoroughly clean the grease inlet fitting or plug. If the
motor has a plug, remove the plug and clean the inlet.
 Remove the drain plug and wipe out any hardened
grease.
 Slowly pump the grease into the grease inlet until the
new grease comes out of the drain plug.
 Start the motor and let it run for a minimum of one
hour to expel any excess grease from the drain opening
before re-installing the drain plug.
 Stop the motor and lock out the switch.
 Re-install the drain plug.
 Put the motor back in operation.
6.1.2.11 After and oil coolers
Pre work
 Switch off the compressor and disconnect power supply
to the compressor.
 Close the discharge end ball valve.
 Release air oil tank pressure and allow the tank to cool
for a few minutes.
Requirements
 Pliers, allen keys.
Maintenance
External surfaces:
 Isolate the machine from the service line
 Vent the separator tank pressure before attempting
maintenance
 Open both the LH panel and cooler inspection cover
 Use compressed air below 2.5 bar/36.3 psi maximum to
clean the outer surface of the cooler. Supply a jet of air
in the direction opposite to cooling airflow direction
 After cleaning the outer surface of the cooler properly
close the cooler with a cleaning plate and an LH panel.
6.1.2.12 Cooler prefilter accessory (optional)
Cooler prefilter cleaning & maintenance instructions
 Switch off the machine.
 Lift upward & take out the cooler pre filter from the
compressor.
 Hold or fix the prefilter assembly in the cleaning area.
 Clean the pre-filter with compressed air at less than 2.5
bar.g (36.3 psi.g) from the reverse / back side of the
cooler prefilter.
 In case of major dust / dirt accumulation in the pre-
filter element, wash with clean water or light detergent.
Do not rinse.
Figure 20. Thermal valve
SEPARATOR BODY
BLOCK
CIRCLIP
PLUG
O-RING
THERMAL ELEMENT
PISTON
SPRING
Figure 31. Cooler external surface
COMPRESSED AIR JET