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13–11–602 Page 32
FIGURE 4–4 – INLET VALVE
valve is used to provide control air pressure from either
the reservoir or plant air system, as required during dif-
ferent operating conditions.
Blowdown Valve (FIGURE 4–3, page 31) – The blow-
down valve is a two–way solenoid valve which is piped
into the water reservoir outlet ahead of the minimum
pressure valve. When the solenoid is de–energized,
the valve opens and the coolant system is blown down.
When the solenoid is energized, the valve closes to al-
low the coolant system to pressurize. A control air
check valve is provided to ensure that the inlet valve is
closed during blowdown.
System Pressure Transducer – This transducer is
connected after the minimum pressure valve. It con-
verts the pressure in the plant air system into an electri-
cal signal for use by the “Auto Sentry–ES” controller for
modulation and control.
Reservoir Pressure Transducer – This transducer
is connected to the coolant system. Its signal is used
to prevent loaded starts, monitor coolant pressure, and
monitor the condition of the water filter.
Oil Pressure Transducer – This signal from trans-
ducer is used to monitor the lubrication oil system op-
eration.
FIGURE 4–5 – SHUTTLE VALVE
Air Filter Vacuum Switch – This switch is used to
monitor air filter condition and alert the user if the filter
requires service or replacement.
Discharge Thermistor – This sensor is located di-
rectly in the compressor discharge. Its signal is used
Summary of Contents for TWISTAIR EWDQ D
Page 14: ...13 11 602 Page 4 FIGURE 1 6 AIR WATER SCHEMATIC FIGURE 1 7 OIL SCHEMATIC...
Page 17: ...13 11 602 Page 7 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 18: ...13 11 602 Page 8 DECALS 216EAQ077 206EWD077 222EAQ077 221EAQ077 208EAQ077...
Page 35: ...13 11 602 Page 25 FIGURE 4 2 FLOW CHART FOR SET UP PROGRAMMING...
Page 44: ...13 11 602 Page 34 FIGURE 4 6 CONTROL TUBING SCHEMATIC 206EWD797 A Ref Drawing...
Page 48: ...13 11 602 Page 38 FIGURE 4 10 WIRING DIAGRAM FULL VOLTAGE 202EWD546 REF DRAWING...
Page 49: ...13 11 602 Page 39 FIGURE 4 11 WIRING DIAGRAM WYE DELTA 203EWD546 REF DRAWING...
Page 50: ...13 11 602 Page 40 FIGURE 4 12 AUTO SENTRY ES CONTROLLER DISPLAY...
Page 53: ...13 11 602 Page 43 FIGURE 5 2 FLOW DIAGRAM AIR COOLED 202EWD797 B Ref Drawing...
Page 54: ...13 11 602 Page 44 FIGURE 5 3 FLOW DIAGRAM WATER COOLED 203EWD797 A Ref Drawing...
Page 68: ......