07773A DCN6833 vii
4.2.10 Hydrocarbon (HC) Scrubber ......................................................................... 24
4.2.11 NO-NO
2
Scrubber ......................................................................................... 25
4.2.12 Charcoal Scrubber ........................................................................................ 25
4.2.13 Carbon Monoxide (CO) Scrubber ................................................................. 25
4.2.14 Final Filter ..................................................................................................... 25
4.2.15 Pressure Gauge............................................................................................ 25
4.2.16 Controller ...................................................................................................... 25
4.2.17 Dewpoint Sensor .......................................................................................... 27
4.2.18 Instrument Panel Indicator Lights ................................................................. 27
5 MAINTENANCE ...................................................................................... 29
5.1 SCHEDULE ............................................................................................................... 29
5.2 MAINTENANCE MODE................................................................................................ 30
5.3 CLEANING ................................................................................................................ 30
5.4 CHECKING TUBING ................................................................................................... 30
5.5 REPLACING THE CHARCOAL SCRUBBER MEDIA ........................................................... 31
5.6 REPLACING THE NO - NO
2
SCRUBBER MEDIA ............................................................ 32
5.7 REPLACING THE CO SCRUBBER ................................................................................ 32
5.8 REPLACING THE HYDROCARBON (HC) SCRUBBER ...................................................... 33
5.9 SERVICING THE REGENERATIVE DRYER ..................................................................... 34
5.10 CHANGING THE REGENERATIVE DRYER’S 4-WAY VALVE .......................................... 37
5.11 LEAK CHECK ......................................................................................................... 37
5.12 FILTER ELEMENT REPLACEMENT ............................................................................ 38
5.12.1 Intake Filter ................................................................................................... 38
5.12.2 Final Filter ..................................................................................................... 38
6 TROUBLESHOOTING ............................................................................ 41
APPENDIX A - SPARE PARTS .......................................................................................... A-1
APPENDIX B - SCHEMATICS ........................................................................................... B-1
LIST OF FIGURES
FIGURE 3-1: 751H STARTUP CONNECTIONS .......................................................................................... 14
FIGURE 4-1: PNEUMATIC DIAGRAM ......................................................................................................... 20
FIGURE 4-2: PLAN VIEW .......................................................................................................................... 21
FIGURE 4-3: INSTRUMENT PANEL ............................................................................................................ 21
FIGURE 4-4: CONTROL BOARD LAYOUT .................................................................................................. 26
FIGURE 5-1: REGENERATIVE DRYER ....................................................................................................... 36