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Figure 4-3 – BLOWDOWN VALVE
Blowdown Valve
(Figure 4-3 – BLOWDOWN VALVE) - This valve normally is used for control functions,
but also serves to relieve reservoir pressure following a shutdown. The blowdown valve is a two-way
solenoid valve which is piped into the oil 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 allow the coolant system to pressurize. A control air check valve is
provided to ensure that the inlet valve is closed during blowdown.
Oil Level Gauge
(Figure 1-6, page 12) - This gauge is located on the oil reservoir and indicates the oil
level. See Section 5 for information on how to correctly read the gauge and proper lubrication.
Figure 4-4 – MINMUM DISCHARGE PRESSURE/CHECK VALVE
Minimum Discharge Pressure/Check Valve
(Figure 4-4, page 32) - An internal spring-loaded minimum
pressure valve is used in the final discharge line to provide a positive pressure on the coolant system of
the compressor even if the air service valve is fully open to atmospheric pressure. This valve also
functions as a check valve to prevent back flow of air from the shop air line when the unit stops, unloads,
or is shut down.
Summary of Contents for EAQ99T
Page 13: ...13 21 602 Page 12 Figure 1 6 AIR OIL FLOW DIAGRAM 202EDM797 Ref Drawing...
Page 45: ...13 21 602 Page 44 Figure 4 14 WIRING DIAGRAM WYE DELTA 328EAQ546 A Ref Drawing Page 1 of 2...
Page 46: ...13 21 602 Page 45 328EAQ546 A Ref Drawing Page 2 of 2...
Page 47: ...13 21 602 Page 46 Figure 4 15 WIRING DIAGRAM LESS STARTER 330EAQ546 A Ref Drawing Page 1 of 2...
Page 48: ...13 21 602 Page 47 330EAQ546 A Ref Drawing Page 2 of 2...
Page 52: ...13 21 602 Page 51 Figure 5 3 FLOW DIAGRAM AIR OIL SYSTEM 203EDM797 A Ref Drawing...
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