9. MAINTENANCE [How to Service the Air Compressor]
81
Before cleaning the drain pipe, intercooler, aftercooler,
control line filter, or replacing the check valve, reduce
the internal pressure to 0 (zero) by opening the
condensate drain. Stop the air compressor and
disconnect the main power. Close the stop valve of the
compressed air discharge. Remove rear panel (1) [Ref
No. 967] .
(1) Intercooler side
Turn the three-way change valve from
Ⓐ
to
Ⓑ
.
(2) Aftercooler side
Turn the Two-way Valve (1) from
Ⓒ
to
Ⓓ
. And
Turn the Two-way Valve (2) from
Ⓔ
to
Ⓕ
.
Verify that the interstage pressure (
INTSTG.P
) and
discharge pressure (
DIS PRESS
) is 0 (zero) on the
LCD monitor. In addition, remove the parts slowly
because the pressure is still remained in air pipings due
to the wrong operation or piping works.
2
Depressurizing the System
Air-Cooled
Water-Cooled
After cooler side
Intercooler side
Two-way Valve (1)
Two-way Valve (2)
Three-way change valve
Ⓔ
Ⓐ
Ⓑ
Ⓒ
Ⓕ
Ⓓ
Ⓔ
Ⓐ
Ⓑ
Ⓒ
Ⓕ
After cooler side
Intercooler side
Two-way Valve (1)
Three-way change valve
Ⓓ
Two-way Valve (2)
