Miller EnPak Mechanic OM-240 113H, Руководство пользователя

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OM-240 113 Page 28
SECTION 7 − COMPRESSOR OPERATION
!
The air pressure gauge reads the air
compressor case pressure. Case
pressure can be high even when ex-
ternal reservoir pressure is zero.
Wait 10 minutes for compressor
blow down cycle to complete before
checking/adding oil or performing
maintenance.
1 Air Pressure Regulator (P-PRV)
2 Air Compressor Gauge (P − PG)
Adjust system maximum pressure with the
pressure regulator. Set pressure in the no-
flow condition only. Set at lowest possible
pressure for the job to reduce engine load-
ing.
.
Pressure is factory set for 120 psi. Do
not set pressure above 175 psi.
Do not set pressure below 90 psi. Com-
pressor will supply 90 psi regardless of
setting below 90 psi.
At pressures above 180 psi, the compres-
sor clutch will temporarily disengage to pre-
vent further pressure build-up, and OVer-
PRES shows temporarily on the remote
panel display. Once the compressor outlet
pressure is reduced below 175 psi, the
compressor controls reset and resume nor-
mal operation.
If pressure reaches 200 psi, the com-
pressor clutch will disengage and shut
down. Once the compressor pressure is re-
duced below 175 psi, the compressor can
be manually re-started.
The compressor is also equipped with a
mechanical safety valve (P − SV) that will
open if pressure approaches 210 psi.
If the compressor continues to overpres-
sure and disengage, see Section 9.
If compressor shuts down due to over-
temperature, it automatically resets when it
cools.
7-1. Air Compressor Controls
1
805 444-A / 805 451-A
2
7-2. Compressor Blow Down
.
To prevent foaming or sudden release of pressure, allow 10 minutes after shutdown before opening the compressor oil fill cap or performing other
compressor maintenance.
To control the release of air in the compressor, the compressor goes through a blow down cycle. Blow down depressurizes the compressor case when
not running; this provides safe release of case pressure and allows reduced load at restart. Blow down also occurs when the compressor is running
but air is not required.