Watts Aerco Benchmark OMM-0124 Installation And Start-Up Manual page 3

Benchmark 5000-6000 Boiler Installation & Startup Manual
CONTENTS
3.1 INTRODUCTION ................................................................................................................................... 37
3.2 START SEQUENCE ............................................................................................................................. 37
3.3 START/STOP LEVELS ......................................................................................................................... 42
3.4 START/STOP LEVELS - AIR/FUEL & ENERGY INPUT ..................................................................... 42
3.4.1 Benchmark 5000 Air/Fuel Valve Position and Energy Input .......................................................... 42
3.4.2 Benchmark 6000 Air/Fuel Valve Position and Energy Input .......................................................... 43
3.5 BOILER ENERGY INPUT CHARTS ..................................................................................................... 44
SECTION 4: INITIAL START-UP ....................................................................... 47
4.1 INITIAL START-UP REQUIREMENTS ................................................................................................. 47
4.2 TOOLS & INSTRUMENTS FOR COMBUSTION CALIBRATION ........................................................ 48
4.2.1 Required Tools & Instrumentation .................................................................................................. 48
4.2.2 Installing Gas Supply Manometer .................................................................................................. 48
4.2.3 Accessing the Analyzer Probe Port ................................................................................................ 49
4.3 PILOT IGNITION ................................................................................................................................... 50
4.4 FUEL TYPES AND COMBUSTION CALIBRATION ............................................................................. 50
4.5 COMBUSTION CALIBRATION ............................................................................................................. 51
4.5.1 NATURAL GAS Combustion Calibration........................................................................................ 51
4.5.2 PROPANE GAS COMBUSTION CALIBRATION ........................................................................... 55
4.6 REASSEMBLY ...................................................................................................................................... 58
4.7 DUAL FUEL SWITCHOVER ................................................................................................................. 58
4.7.1 Switchover from NATURAL GAS to PROPANE ............................................................................ 59
4.7.2 Switchover from PROPANE to NATURAL GAS ............................................................................ 60
4.8 OVER-TEMPERATURE LIMIT SWITCHES ......................................................................................... 61
4.8.1 Digital Alarm Switch Checks and Adjustments .............................................................................. 61
SECTION 5: SAFETY DEVICE TESTING ............................................................. 63
5.1 TESTING OF SAFETY DEVICES ......................................................................................................... 63
5.2 LOW GAS PRESSURE TEST .............................................................................................................. 63
5.3 HIGH GAS PRESSURE TEST ............................................................................................................. 65
5.4 LOW WATER LEVEL FAULT TEST ..................................................................................................... 67
5.5 WATER TEMPERATURE FAULT TEST .............................................................................................. 68
5.6 INTERLOCK TESTS ............................................................................................................................. 69
5.6.1 Remote Interlock Test .................................................................................................................... 69
5.6.2 Delayed Interlock Test .................................................................................................................... 69
5.7 FLAME FAULT TEST ............................................................................................................................ 70
5.8 AIR FLOW FAULT TESTS .................................................................................................................... 70
5.8.1 Blower Proof Switch Test ............................................................................................................... 71
5.8.2 Blocked Inlet Switch Test ............................................................................................................... 72
5.9 SSOV PROOF OF CLOSURE SWITCH CHECK ................................................................................. 73
5.10 PURGE SWITCH OPEN DURING PURGE ........................................................................................ 74
5.11 IGNITION SWITCH OPEN DURING IGNITION ................................................................................. 75
5.12 SAFETY PRESSURE RELIEF VALVE TEST ..................................................................................... 76
SECTION 6: BOILER SEQUENCING TECHNOLOGY ........................................... 77
6.1 INTRODUCTION ................................................................................................................................... 77
6.1.1 Installation Notes ............................................................................................................................ 78
6.2 AERCO BST QUICK START CHART ................................................................................................... 78
6.3 BST IMPLEMENTATION INSTRUCTION ............................................................................................ 79
6.3.1 OPTION 1 - Constant Setpoint With Direct Wired Header Sensor ................................................ 79
6.3.2 OPTION 2 - Constant Setpoint With Modbus Wired Header Sensor ............................................. 80
OMM-0123_E • GF-207 • 12/17/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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