DE-18 USER MANUAL SECTION 6
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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 located on the
outside of the package. 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 com-
pleted, the controller will shutdown on
“OVERCRANK".
• If engine start is successful, cranking is ter-
minated 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
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 pressure
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.
SUMP SIGHT GLASS Two sight glasses, located at the sump end, indicate the level of lubricant
in the sump. The following guideline for oit level should be used:
Compressor stopped: Oil level should reach 25-100% of the upper sight
glass.
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.
ENGINE OIL DIPSTICK Indicates the oil level in the engine. The level should be between "full"
and "add".
COOLANT OVERFLOW RESERVOIR A plastic reservoir located on the side of the radiator to indicate the
engine coolant level With the engine cold, the level should be between
"LOW" and "FULL".
CONTROL OR INDICATOR PURPOSE
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