8.6 SAFETY DEVICE TESTING ............................................................................................................... 111
8.7 BURNER INSPECTION ...................................................................................................................... 111
8.8 CONDENSATE DRAIN TRAP ............................................................................................................ 114
8.9 AIR FILTER CLEANING AND REPLACEMENT ................................................................................ 115
8.10 REFRACTORY REPLACEMENT – BMK5000 & 6000 ONLY .......................................................................... 115
8.10.1 Rear Refractory Replacement .................................................................................................................... 116
8.10.2 Front Refractory Replacement .................................................................................................................. 118
8.11 SHUTTING BOILER DOWN FOR EXTENDED PERIOD ................................................................. 119
8.11.1 Benchmark 5000 & 6000 Long Term Blower Storage ................................................................................. 119
8.12 RETURNING THE BOILER TO SERVICE AFTER SHUTDOWN .................................................... 121
8.13 RECOMMENDED PERIODIC TESTING .......................................................................................... 122
8.14 RECOMMENDED SPARES ............................................................................................................. 124
SECTION 9: AERTRIM OPERATION ................................................................ 125
9.1 AERTRIM INTRODUCTION ............................................................................................................... 125
9.2 AERTRIM ACTIVATION ..................................................................................................................... 126
9.3 OPERATION DETAILS ....................................................................................................................... 126
9.4 AERTRIM O
2
SENSOR AUTO CALIBRATION .................................................................................. 128
9.5 AERTRIM MENU VALUES AND DEFAULTS..................................................................................... 128
9.6 AERTRIM MAINTENANCE AND TROUBLESHOOTING ................................................................... 136
SECTION 10: TROUBLESHOOTING .................................................................. 139
10.1 INTRODUCTION ............................................................................................................................... 139
10.2 ADDITIONAL FAULTS WITHOUT SPECIFIC FAULT MESSAGES ................................................ 150
NOTES: .................................................................................................. 152
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