Gardner Denver EBU99E - Figure 4-8 - Control Schematic - Compressor Unloaded - Constant Speed Mode

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13-21-602 Page 38

Figure 4-8 – CONTROL SCHEMATIC – COMPRESSOR UNLOADED – CONSTANT SPEED MODE

EBQ & EBU UNITS ONLY

209EDM797-A

(Ref. Drawing)

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 & Instrumentation30
Figure 4-1 - Key Pad31
Figure 4-2 - Schematic Tubing Diagram32
Figure 4-3 - Blowdown Valve33
Figure 4-4 - Minmum Discharge Pressure/Check Valve33
Figure 4-5 - Inlet Valve34
Figure 4-6 - Shuttle Valve35
Figure 4-7 - Turn Valve - Electra-Saver Only36
Figure 4-8 - Control Schematic - Compressor Unloaded - Constant Speed Mode39
Figure 4-9 - Control Schematic - Compressor at Full Load - Constant Speed Mode40
Figure 4-10 - Control Schematic - Compressor Unloaded - Low Demand Mode or Auto Mode41
Figure 4-11 - Control Schematic - Compressor at Full Load42
Figure 4-12 - Control Schematic - Compressor Fully Unloaded - Low Demand Mode Switch off43
Figure 4-13- Control Schematic - Compressor Fully Loaded - Low Demand Mode Switch on44
Figure 4-14 - Wiring Diagram - Wye Delta45
Figure 4-15 - Wiring Diagram - Less Starter47
Section 5, Lubrication, Oil Cooler, Oil Filter & Separator49
Figure 5-1 - Dew Point Chart °F51
Figure 5-2 - Dew Point Chart °C51
Figure 5-3 - Flow Diagram - Air/Oil System52
Figure 5-4 - Oil Flow Diagram - Remote Overhead Mounted Cooler53
Figure 5-5 - Cooler Drain Detail54
Figure 5-6 - Oil Level Gauge57
Figure 5-7 - Oil Change Interval58
Figure 5-8 - Approximate Oil System Capacities59
Figure 5-9 - Thermostatic Mixing Valve Element61
Figure 5-10 - Water Control Valve62
Figure 5-11 - Oil Separator64
Section 6, Air Filter67
Figure 6-1 - Heavy Duty Air Filter67
Section 7, Coupling69
Figure 7-1 - Installation of Coupling Cushions69
Section 8, Maintenance Schedule72
Section 9, Troubleshooting74

Gardner Denver EBU99E - Figure 4-8 - Control Schematic - Compressor Unloaded - Constant Speed Mode

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