Panel Group consists of a panel containing the
line pressure, sump pressure and discharge
temperature gauges, the air filter, the separator
element and the fluid filter restriction gauges,
along with START " " and STOP "" push
buttons and an hourmeter.
Refer to Figure 2-7 for locations of the following
indicators and controls:
• The line (terminal) pressure gauge is con-
nected to the dry side of the receiver down-
stream from the check valve and continually
monitors the air pressure.
• The sump pressure gauge continually
monitors the sump pressure at the various
load and/or unload conditions.
• The discharge temperature gauge moni-
tors the temperature of the air leaving the
compressor unit. For both air-cooled and
water-cooled compressors the normal read-
ing is approximately 180°F to 205°F (82°C
to 96°C).
• The air filter restriction gauge monitors the
condition of the air intake filter and shows in
the red zone (20 to 30” water [51 to 76 cm])
when filter service is required. The com-
pressor must be running fully loaded for an
accurate indication.
· The START " " pad turns the compressor
on.
• The STOP " " pad turns the compressor
off.
• The hourmeter records accumulative hours
of operation for the compressor and is use-
ful for planning and logging service opera-
tions.
• The POWER ON ( ) LED on the instru-
ment panel indicates when power to the
compressor is supplied.
• The ON LED indicates when the compressor
is running.
• The AUTO " " pad is used to enable
automatic control.
• The separator maintenance gauge moni-
tors condition of the separator element and
shows in the red zone when the element
restriction is excessive.
• The fluid filter maintenance gauge moni-
tors the condition of the bearing lube filter
element and shows in the red zone when
the element should be changed.
Section 2
DESCRIPTION
13
Figure 2-6 Air Inlet System
Figure 2-7 Instrument Panel Group
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