PR2: 04/22/13 Page 5of 158
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
AERCO International, Inc. •100 Oritani Dr. •Blauvelt, NY 10913 •Ph: 800-526-0288
5.3 CONSTANT SETPOINT MODE..........................................................................57
Setting the Setpoint.................................................................................................. 575.3.1
5.4 REMOTE SETPOINT MODES............................................................................58
Remote Setpoint Field Wiring................................................................................. 585.4.1 Remote Setpoint Startup.......................................................................................... 595.4.2
5.5 DIRECT DRIVE MODES.....................................................................................59
Direct Drive Field Wiring........................................................................................ 605.5.1 Direct Drive Startup................................................................................................. 605.5.2
5.6 BOILER MANAGEMENT SYSTEM (BMS)..........................................................60
BMS External Field Wiring..................................................................................... 605.6.1 BMS Setup and Startup............................................................................................ 615.6.2
5.7 COMBINATION CONTROL SYSTEM (CCS)......................................................61
Combination Control System Field Wiring............................................................. 615.7.1 Combination Control System Setup and Startup..................................................... 625.7.2
CHAPTER 6: SAFETY DEVICE TESTING ......................................................................... 63
6.1 TESTING OF SAFETY DEVICES........................................................................63
6.2 NATURAL GAS LOW GAS PRESSURE FAULT TEST.......................................63
6.3 PROPANE LOW GAS PRESSURE FAULT TEST..............................................64
6.4 NATURAL GAS HIGH GAS PRESSURE TEST..................................................65
6.5 PROPANE HIGH GAS PRESSURE TEST..........................................................65
6.6 LOW WATER LEVEL FAULT TEST....................................................................66
6.7 WATER TEMPERATURE FAULT TEST.............................................................66
6.8 INTERLOCK TESTS............................................................................................67
REMOTE INTERLOCK ......................................................................................... 676.8.1 DELAYED INTERLOCK....................................................................................... 686.8.2
6.9 FLAME FAULT TESTS........................................................................................68
6.10 AIR FLOW FAULT TESTS ................................................................................69
6.11 SSOV PROOF OF CLOSURE SWITCH............................................................70
6.12 IGNITION SWITCH OPEN DURING IGNITION ................................................71
6.13 PURGE SWITCH OPEN DURING PURGE.......................................................71
6.14 SAFETY PRESSURE RELIEF VALVE TEST....................................................72
CHAPTER 7: MAINTENANCE.............................................................................................. 73
7.1 MAINTENANCE SCHEDULE..............................................................................73
7.2 IGNITER-INJECTOR...........................................................................................74
7.3 FLAME DETECTOR............................................................................................76
7.4 COMBUSTION CALIBRATION ...........................................................................77
7.5 SAFETY DEVICE TESTING................................................................................77
7.6 BURNER ASSEMBLY INSPECTION ..................................................................77
7.7 CONDENSATE DRAIN TRAP.............................................................................80
