Watts AERCO Benchmark 2.0LN, User Manual

Page: 5 / 158

PR2: 04/22/13 Page 5 of 158
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
5.3 CONSTANT SETPOINT MODE .......................................................................... 57
Setting the Setpoint .................................................................................................. 57 5.3.1
5.4 REMOTE SETPOINT MODES ............................................................................ 58
Remote Setpoint Field Wiring ................................................................................. 58 5.4.1
Remote Setpoint Startup .......................................................................................... 59 5.4.2
5.5 DIRECT DRIVE MODES ..................................................................................... 59
Direct Drive Field Wiring ........................................................................................ 60 5.5.1
Direct Drive Startup ................................................................................................. 60 5.5.2
5.6 BOILER MANAGEMENT SYSTEM (BMS) .......................................................... 60
BMS External Field Wiring ..................................................................................... 60 5.6.1
BMS Setup and Startup ............................................................................................ 61 5.6.2
5.7 COMBINATION CONTROL SYSTEM (CCS) ...................................................... 61
Combination Control System Field Wiring ............................................................. 61 5.7.1
Combination Control System Setup and Startup ..................................................... 62 5.7.2
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 ......................................................................................... 67 6.8.1
DELAYED INTERLOCK ....................................................................................... 68 6.8.2
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