TABLE OF CONTENTS
iv L20-292, rev. 1 (05/11)
3.2. MONTHLY PREVENTATIVE MAINTENANCE ...........................................................................12
3.2.1. DELIMING.............................................................................................................................12
3.3. ANNUAL/PERIODIC PREVENTATIVE MAINTENANCE AND INSPECTION............................12
3.3.1. HEATING ELEMENT ............................................................................................................12
3.3.2. TEMPERATURE PROBE & HIGH LIMIT PROBE ................................................................12
3.3.3. CONTROLLER......................................................................................................................12
3.3.4. CONTROL BOX & ELECTRICAL COMPONENTS...............................................................12
3.3.5. TANK.....................................................................................................................................13
3.3.6. DRAIN SYSTEM ...................................................................................................................13
4. TROUBLESHOOTING .........................................................................14
4.1. POWER FAILURE........................................................................................................................14
4.2. HIGH TEMPERATURE LIMIT......................................................................................................14
4.3. DRAIN VALVE INTERLOCK .......................................................................................................14
4.4. TROUBLESHOOTING CHART ...................................................................................................15
4.5. CONTROLLER WARNING DISPLAYS.......................................................................................15