Section 2
DESCRIPTION
11
Figure 2---4 Air Inlet System
valve, thus preventing reverse rotation when the
compressor is shut down.
WARNING
!
“The Plastic Pipe Institute recommends against the
use of thermoplastic pipe to transport compresse d
air or other compressed gases in exposed above
ground locations, e.g. in exposed plant piping.” (I)
Sullube 32 should not be used with PVC piping sys-
tems. It may affect the bond at cemented joints. Cer-
tain other plastic materials may also be affected.
(I) Plastic Pipe Institute, Recommendation B,
Adopted January 19, 1972.
2.9 INSTRUMENT PANEL GROUP, FUNCTIONAL
DESCRIPTION-- STANDARD ELECTRO/ME-
CHANICAL
Refer to Figure 2 ---5 for specific location of parts de-
scribed. The Instrument Panel group consists of a
panel containing the line pressure, sump pres-
sure and discharge temperature gauges,the
separator element and the fluid filter, restriction
gauges,alongwithSTART and STOP pushbut -
tons and an hourmeter.
Refer to Figure 2---5 for locations of t he following in-
dicators and controls:
S The line (terminal) pressure gauge is con-
nected to the dry side of the receiver downstream
from the check valve and continually monitors the
air pressure.
S The sump pressure gauge continually monitors
the sump pressure at the various load and/or un-
load conditions.
S The discharge temperature gauge monitors
the temperature of the air leaving the compressor
unit. For both air ---cooled and water ---cooled com-
pressors the normal reading is approximately
180_F to 205_F(82_ Cto96_C).
S The separator maintenance gauge monitors
condition of the separator element and shows in
the red zone wh en the element restriction is exces-
sive.
S The fluid filter maintenance gauge monitors
the condition of the bearing lube filter element and
shows in t he red zone when the element should be
changed.
S The START pushbutton turns the compressor on.
S The STOP pushbutton turns the compressor off.
S The hourmeter records accumulative hours of
operation for the compressor and is useful for plan-
ning and logging service operations.
S The red light on the instrument panel indicates
when power to the compressor is supplied.
S The green light indicates when t he compressor is
running.
S The HAND/AUTO switch provides selection be-
tween hand operation and automatic control.
Figure 2---5 Instrument Panel Group
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