Watts AERCO Benchmark OMM-0121, Operation And Maintenance Manual, Page: 3 / 164

Benchmark 750-3000 Boiler Operation & Maintenance Manual
CONTENTS
OMM-0122_D
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GF-206
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5/9/2019
Technical Support •
(800) 526-0288
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Mon-Fri, 8 am - 5 pm EST Page 3 of 164
4.3 FLAME DETECTOR ............................................................................................................................. 45
4.4 O
2
SENSOR .......................................................................................................................................... 45
4.5 SAFETY DEVICE TESTING ................................................................................................................. 46
4.6 BURNER INSPECTION ........................................................................................................................ 46
4.6.1 BMK 750/1000 BURNER INSPECTION ............................................................................................................. 47
4.6.2 BMK 1500 – 3000 BURNER INSPECTION ......................................................................................................... 49
4.7 CONDENSATE DRAIN TRAP .............................................................................................................. 53
4.8 AIR FILTER CLEANING AND REPLACEMENT .................................................................................. 54
4.9 WATER CUTOFF (LWCO) CAPACITOR INTEGRITY TEST ............................................................... 55
4.9.1 Low Water Cutoff (LWCO) - Capacitor Electrical Short Test ........................................................................... 56
4.9.2 Low Water Cutoff (LWCO) - Standard C-More Test ........................................................................................ 57
4.10 SHUTTING BOILER DOWN FOR EXTENDED PERIOD ................................................................... 57
4.11 PLACING THE BOILER BACK IN SERVICE AFTER A PROLONGED SHUTDOWN ....................... 58
4.12 SPARK MONITOR (AC CURRENT TRANSDUCER) ......................................................................... 58
SECTION 5: TROUBLESHOOTING GUIDE ......................................................... 59
5.1 INTRODUCTION ................................................................................................................................... 59
5.2 ADDITIONAL FAULTS WITHOUT SPECIFIC FAULT MESSAGES .................................................... 71
APPENDIX A: BOILER MENU ITEM DESCRIPTIONS ............................................. 73
TABLE A-1: OPERATING MENU ITEM DESCRIPTIONS ......................................................................... 73
TABLE A-2: SETUP MENU ITEM DESCRIPTIONS ................................................................................... 75
TABLE A-3: CONFIGURATION MENU ITEM DESCRIPTIONS ................................................................ 76
TABLE A-4: TUNING MENU ITEM DESCRIPTIONS ................................................................................. 79
TABLE A-5: COMBUSTION CALIBRATION MENU ITEM DESCRIPTIONS ............................................. 80
TABLE A-6: CALIBRATION MENU ITEM DESCRIPTIONS ....................................................................... 81
APPENDIX B: STARTUP, STATUS, & FAULT MESSAGES ...................................... 85
TABLE B-1: STARTUP AND STATUS MESSAGES .................................................................................. 85
TABLE B-2: FAULT MESSAGES ............................................................................................................... 86
APPENDIX C: SENSOR RESISTANCE/VOLTAGE CHART ........................................ 89
APPENDIX D: RECOMMENDED PERIODIC TESTING ............................................ 91
APPENDIX E: INDOOR/OUTDOOR RESET RATIO CHARTS .................................. 93
APPENDIX F: BENCHMARK 750/1000 PART LIST ............................................... 97
APPENDIX G: BENCHMARK 1500/2000 PART LIST ........................................... 107
APPENDIX H: BENCHMARK 2500/3000 PART LIST ........................................... 123
APPENDIX I: WIRING DIAGRAMS ................................................................... 145
APPENDIX J: C-MORE CONTROLLER VIEWS .................................................... 161
APPENDIX K: RECOMMENDED SPARES ........................................................... 163