Gardner Denver AUTOSENTRY EAU99Q - COMPRESSOR CAPACITY CONTROL - TURN VALVE UNITS ONLY; Turn Valve Operation

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13-9-666 Page 34

COMPRESSOR CAPACITY CONTROL - TURN VALVE UNITS ONLY

The capacity of the compressor is controlled by the action of the turn valve and the compressor inlet

valve.

The turn valve controls compressor delivery to match demands of 40% to 100% of the compressor’s

maximum capacity. The inlet valve throttles to control compressor delivery to match demands of 0% to

40% of the compressors maximum capacity.

Example with normal setting of 100 PSIG:

Compressor Delivery

Capacity

Inlet Valve Position

Turn Valve Position

Discharge Manifold

Pressure (psi)

Full Open Closed 100

70% Open 50% Open 100

40% Open Full Open 100

30% Closing Full Open 103

20% Closing Full Open 103

0% Closed Full Open 103

Main Page

Maintain Compressor Reliability and Performance with2
Genuine Gardner Denver Compressor Parts and Support Services2
Instructions for Ordering Repair Parts/Remanufactured Airends2
Warning - Prohibition - Mandatory Label Information3
Safety Precautions5
Table of Contents6
Index7
List of Illustrations9
Section 1, General Information10
Figure 1-1 - Compression Cycle10
Figure 1-2 - Starter Box11
Figure 1-3 - Control Box11
Figure 1-4 - Compressor / Motor Side12
Figure 1-5 - Cooler / Reservoir Side12
Figure 1-6 - Air/Oil Flow Diagram13
Section 2, Installation14
Figure 2-1 - Typical Compressor Room15
Figure 2-2 - Air Flow Chart15
Figure 2-3 - Cold Weather Installation17
Figure 2-4 - Inlet Line Lengths18
Figure 2-5 - Heat Exchanger (Oil Cooler) Approximate Water Flow20
Figure 2-6 - Aftercooler Approximate Water Flow20
Figure 2-7 - Series Piping22
Figure 2-8 - Parallel Piping22
Section 3, Starting & Operating Procedures25
Section 4, Controls & Instrumentation28
Figure 4-1 - Schematic Tubing Diagram29
Figure 4-2 - Blowdown Valve30
Figure 4-3 - Minimum Discharge Pressure/Check Valve30
Figure 4-4 - Inlet Valve31
Figure 4-5 - Shuttle Valve32
Figure 4-6 - Turn Valve - Electra-Saver Only33
Figure 4-7 - Control Schematic - Compressor Unloaded - Constant Speed Mode36
Figure 4-8 - Control Schematic - Compressor at Full Load - Constant Speed Mode37
Figure 4-9 - Control Schematic - Compressor Unloaded - Low Demand Mode or Auto Mode38
Figure 4-10 - Control Schematic - Compressor at Full Load39
Figure 4-11 - Control Schematic - Compressor Fully Unloaded - Low Demand Mode Switch off40
Figure 4-12 - Control Schematic - Compressor Fully Loaded - Low Demand Mode Switch on41
Figure 4-13 - Wiring Diagram - Wye Delta42
Figure 4-14 - Wiring Diagram - Full Voltage43
Figure 4-15 - Wiring Diagram - Wye Delta44
Figure 4-16 - Wiring Diagram - Full Voltage45
Section 5, Lubrication, Oil Cooler, Oil Filter & Separator46
Figure 5-1 - Dew Point Chart °F48
Figure 5-2 - Dew Point Chart °C48
Figure 5-3 - Flow Diagram - Air/Oil System49
Figure 5-4 - Oil Flow Diagram - Remote Overhead Mounted Cooler50
Figure 5-5 - Cooler Drain Detail51
Figure 5-6 - Oil Level Gauge54
Figure 5-7 - Oil Change Interval55
Figure 5-8 - Approximate Oil System Capacities56
Figure 5-9 - Thermostatic Mixing Valve Element58
Figure 5-10 - Water Control Valve59
Figure 5-11 - Oil Separator61
Section 6, Air Filter64
Figure 6-1 - Heavy Duty Air Filter64
Section 7, Coupling66
Figure 7-1 - Installation of Coupling Cushions66
Section 8, Maintenance Schedule69
Section 9, Troubleshooting71

Gardner Denver AUTOSENTRY EAU99Q - COMPRESSOR CAPACITY CONTROL - TURN VALVE UNITS ONLY; Turn Valve Operation

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