BMM (Burner Management Module) Fault Codes ............................................................................... 122
CHAPTER 8: MAINTENANCE SCHEDULE ........................................................................................... 125
8.1 Instructions for Inspection and Maintenance.................................................................................................. 126
8.2 PERIODIC EXAMINATION OF VENTING SYSTEM .............................................................................................. 126
8.3 PROPER PROCEDURE FOR CLEANING EXHAUST FLUE ..................................................................................... 126
Cleaning the Condensate Drain Line ..................................................................................................... 127
8.4 CHECKING CSD-1 MANIFOLD FLOW SWITCH ................................................................................................... 127
8.5 VISUAL INSPECTION OF THE FLAME ................................................................................................................ 128
8.6 PROPER REASSEMBLY AND RESEALING OF THE VENT-AIR INTAKE SYSTEM .................................................... 128
8.7 PRESSURE SWITCH HOSES AND CONNECTIONS .............................................................................................. 129
8.8 BURNER / HEAT EXCHANGER CLEANING PROCEDURE .................................................................................... 130
8.9 HEAT AND RETURN SENSOR RESISTANCE VALUES .......................................................................................... 130
8.10 UNIT DISASSEMBLY ........................................................................................................................................ 131
8.11 CLEANING THE BURNER MODULE AND COMBUSTION CHAMBER ................................................................ 138
8.12 CLEANING THE HEAT EXCHANGER ................................................................................................................. 140
Mechanical Cleaning of the Heat Exchanger ...................................................................................... 140
Cleaning the Heat Exchanger with Cleaning Solution ......................................................................... 142
Repeat Cleaning .................................................................................................................................. 142
8.13 REASSEMBLY OF THE BURNER MODULES ...................................................................................................... 143
8.14 FINAL PROCEDURES AFTER MAINTENANCE................................................................................................... 143
8.15 MAINTENANCE KIT PART NUMBER ................................................................................................................ 144
CHAPTER 9: SPARE PARTS DRAWING AND LISTS .......................................................................... 145
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