Benchmark 1500 - 2000 Boilers
Installation, Operation & Maintenance Manual
OMM-0097_0E AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 5 of 182
GF-142 Ph.: 800-526-0288 10/01/2015
6.7 FLAME FAULT TESTS ......................................................................................................................... 79
6.8 AIR FLOW FAULT TESTS .................................................................................................................... 81
6.8.1 Blower Proof Switch Test ................................................................................................................................ 81
6.8.2 Blocked Inlet Switch Test ................................................................................................................................ 81
6.9 SSOV PROOF OF CLOSURE SWITCH ............................................................................................... 83
6.10 PURGE SWITCH OPEN DURING PURGE ........................................................................................ 84
6.11 IGNITION SWITCH OPEN DURING IGNITION ................................................................................. 85
6.12 SAFETY PRESSURE RELIEF VALVE TEST ..................................................................................... 86
CHAPTER 7. MAINTENANCE ......................................................................................................... 87
7.1 MAINTENANCE SCHEDULE ............................................................................................................... 87
7.2 IGNITER-INJECTOR ............................................................................................................................ 88
7.3 FLAME DETECTOR ............................................................................................................................. 90
7.4 O
2
SENSOR 91
7.5 SAFETY DEVICE TESTING ................................................................................................................. 91
7.6 BURNER ASSEMBLY INSPECTION ................................................................................................... 92
7.7 CONDENSATE DRAIN TRAP .............................................................................................................. 95
7.8 AIR FILTER CLEANING & REPLACEMENT ........................................................................................ 96
7.9 WATER CUTOFF (LWCO) CAPACITOR INTEGRITY TEST ............................................................... 97
7.9.1 Low Water Cutoff (LWCO) - Capacitor Electrical Short Test ........................................................................... 97
7.9.2 Low Water Cutoff (LWCO) - Standard C-More Test ........................................................................................ 99
7.10 SHUTTING THE BOILER DOWN FOR AN EXTENDED PERIOD OF TIME ..................................... 99
7.11 PLACING THE BOILER BACK IN SERVICE AFTER A PROLONGED SHUTDOWN ..................... 100
7.12 SPARK MONITOR (AC CURRENT TRANSDUCER) ....................................................................... 100
CHAPTER 8. TROUBLESHOOTING GUIDE ............................................................................. 101
8.1 INTRODUCTION ................................................................................................................................. 101
8.2 ADDITIONAL FAULTS WITHOUT SPECIFIC FAULT MESSAGES .................................................. 113
CHAPTER 9. BOILER SEQUENCING TECHNOLOGY ............................................................. 115
9.1 INTRODUCTION ................................................................................................................................. 115
9.1.1 Installation Notes .......................................................................................................................................... 116
9.2 AERCO BST QUICK START CHART ................................................................................................. 117
9.3 BST IMPLEMENTATION INSTRUCTION .......................................................................................... 118
9.3.1 Option 1 - Constant Setpoint with DIRECT Wired Header Sensor ................................................................ 118
9.3.2 Option 2 - Constant Setpoint with MODBUS Wired Header Sensor ............................................................. 119
9.3.3 Option 3 - Outdoor Reset with DIRECT WIRED Header Sensor AND DIRECT WIRED Outdoor Sensor ......... 120
9.3.4 Option 4 - Outdoor Reset with MODBUS Header Sensor AND MODBUS Outdoor Sensor........................... 122
9.3.5 Option 5 - Remote Setpoint with DIRECT WIRED Header Sensor AND 4-20ma Setpoint Drive ................... 124
9.3.6 Option 6 - Remote Setpoint with DIRECT WIRED Header Sensor AND MODBUS Setpoint Drive ................. 126
9.3.7 Option 7 - Remote Setpoint with MODBUS Header Sensor AND 4-20ma Setpoint Drive ............................ 127
9.3.8 Option 8 - Remote Setpoint with MODBUS Header Sensor AND MODBUS Setpoint Drive ......................... 129
APPENDIX A: BOILER MENU ITEM DESCRIPTIONS ............................................................. 131
TABLE A-1: OPERATING MENU ITEM DESCRIPTIONS ....................................................................... 131
TABLE A-2: SETUP MENU ITEM DESCRIPTIONS ................................................................................. 132
TABLE A-3: CONFIGURATION MENU ITEM DESCRIPTIONS .............................................................. 133
TABLE A-4: TUNING MENU ITEM DESCRIPTIONS ............................................................................... 136
TABLE A-5: COMBUSTION CALIBRATION MENU ITEM DESCRIPTIONS ........................................... 137
APPENDIX B: STARTUP, STATUS & DISPLAY MESSAGES .................................................. 139
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