SECTION 4 DE-18 USER MANUAL
37
This combined inlet/blowdown configuration ensures
the air compressor defaults to a safe unloaded
condition in the unlikely event of control signal loss, a
component failure, or loss of power. A closed inlet
and open blowdown state are also the conditions for
these subsystems during the UNLOAD MODE.
START MODE, 0 TO 30 PSIG (0 TO 2.1
BARG)
When the start button on the control panel is
depressed, the unit starts and ramps up to 1400
RPM. During this mode, the controller maintains its
default closed (de-energized) signal to the inlet
control solenoid valve, keeping the inlet butterfly
valve closed. The same controller signal maintains
its default closed (de-energized) signal to the
blowdown subsystem solenoid valve, resulting in the
pneumatic blowdown valve staying open.
Figure 4-5: Silencing/Discharge Air and Cooling Systems
1. Temperature 6—(T6)
2. Low Pressure Stage Compressor
3. High Pressure Stage Compressor
4. Mounted to Lifting Bail
5. Compressor Oil Filter Transducers
6. High Pressure Silencer/Dampener
7. Temperature 2—(T2)
8. Check Valve
9. Pressure Relief Valve
10. Blowdown Valve
11. High Pressure Heat Exchanger
12. Discharge Transducer
13. Moisture Separator
14. Pressur 2 (P2)/Temperature 5 (T5)
15. First Stage Silencer Transducer
16. Service Valve
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