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Section 6
COMPRESSOR OPERATION
6.2 PURPOSE OF CONTROLS
CONTROL OR INDICATOR
SUMP SIGHT GLASS (CONT.)
ENGINE OIL DIPSTICK
COOLANT OVERFLOW RESERVOIR
6.3 STARTING SEQUENCE
If no class "A" shutdown conditions exist, then the
controller will be in the "STANDBY" state. The con-
troller must be in the "STANDBY" state before the
engine can be started.
1. Close the package service valve.
2. Close the manual operator on the interstage and
high pressure stage condensate drain valves.
3. Pull out both E-Stop buttons. One is located on
the outside of the package,
and the other on the control panel. This action will
power the control panel
and P2 will be preset at the factory default of 125
psi.
4. Press the START button.
5. After a short delay, engine cranking begins.
6. Engine cranking is terminated when:
·Engine speed rises above 500 RPM
·Cranking for longer than 15 seconds
·After four start attempts have been completed, the
controller will shutdown on "OVERCRANK".
·If engine start is successful, cranking is terminated
and the controller will enter the "RUNNING" state.
Subsequently, the engine will accelerate and hold
at a speed of 1400 rpm unloaded.
6.4 WARM-UP CYCLE
This cycle consists of the engine operating for five
minutes or until the engine coolant temperature
reaches 130°F. Subsequently, the compressor will
load by opening the intake valve and the engine will
accelerate to meet the desired set point system
28
PURPOSE
Compressor operating: Oil level should be between the
upper and lower sight glasses. The compressor should not
be operated with an oil level below the lower sight glass.
Indicates the oil level in the engine. The level should be
between "full" and "add".
A plastic reservoir located on the side of the radiator to indi-
cate the engine coolant level. With the engine cold, the level
should be between "LOW" and "FULL".
pressure (P2). When the compressor loads, the
service valve should be immediately opened.
6.5 RUNNING SEQUENCE
·The engine speed will modulate between 1400 and
1840 rpm and stabilize until the system set pres-
sure is reached.
·The compressor unloads when system pressure
increases by 5 psi above the set point, and the
engine speed is at 1400 rpm.
·The compressor loads when system pressure
decreases by 5 psi below the set point.
At any time the controller is powered up, the set
point pressure (P2) can be changed by pressing the
"INCR PRESS" or "DECR PRESS" buttons. During
operation the drain solenoid valves (two) will be
energized to open for three (3) seconds every two
(2) minutes. The duration and interval are
adjustable.
6.6 NORMAL STOPPING SEQUENCE
Press the stop button and close the service valve.
·The controller will go to the "COOLDOWN" state.
The compressor unloads immediately and the
engine speed reduces to 1400 rpm for a cool down
duration of 5 minutes.
· After the cool down period expires, the drain sole-
noid valves are energized for 10 seconds and the
power to the CAT ECM is turned off.
·The engine PTO enable is turned off.
·The controller will return to the "STANDBY" state.
·Open the interstage and the aftercooler drain sole-
noid manual levers. Press E-Stop button.
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