Contents
Section 4 Maintenance and Repair
4.1 Preventative Maintenance Schedule.................................................................................... 4 - 1
Weekly.................................................................................................................................. 4 - 1
Quarterly ............................................................................................................................... 4 - 1
Semi-Annually....................................................................................................................... 4 - 1
Annually................................................................................................................................ 4 - 2
4.2 Desiccant Charging Procedures........................................................................................... 4 - 2
4.3 Filter Element Replacement ................................................................................................. 4 - 3
Dryer Models LS60 through LS1250 .................................................................................... 4 - 3
Dryer Models LS1500 through LS2580 ................................................................................ 4 - 4
4.4 Servicing The Internal Float Drain Valve (If Equipped) ........................................................ 4 - 4
4.5 Automatic Drain Valve Disassembly and Servicing.............................................................. 4 - 5
4.6 Moisture Indicator Recharging Procedure............................................................................ 4 - 7
4.7 Inlet and Purge Exhaust Switching Valve Maintenance
(LS60 through LS760) .......................................................................................................... 4 - 8
4.8 Inlet and Purge Exhaust Switching Valve Maintenance (LS1000) ....................................... 4 - 10
4.9 3" Inlet Switching Valve Maintenance (Models LS1250 and LS1500).................................. 4 - 12
4.10 2" Purge Exhaust Switching Valve Maintenance (Model LS1250 only)................................ 4 - 14
4.11 3" Purge Exhaust Switching Valve Maintenance (Model LS1500 only)................................ 4 - 16
4.12 Purge and Outlet Check Valve Maintenance
(Models LS60 through LS760).............................................................................................. 4 - 18
4.13 3" Purge and Outlet Check Valve Maintenance
(Models LS1000 through LS1500)........................................................................................ 4 - 20
4.14 Remote Flow Restrictor Maintenance (Model LS1250 only) ................................................ 4 - 22
4.15 Flow Restrictor Maintenance (Models LS1500 through LS2580)......................................... 4 - 23
4.16 Purge Adjusting Valve (Models LS2070 and LS2580) ......................................................... 4 - 26
4.17 Pilot Gas Filter Maintenance (Models LS2070 and LS2580)................................................ 4 - 27
Section 5 Troubleshooting Guide
Appendix A Purge Curves
Appendix B Replacement Parts
Appendix C Specifications, Purge Curves and Replacement Parts
for -100°F Pressure Dew Doint Dryers