Page 4 of 166 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 PR1:10/18/12
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
2.12 FLUE GAS VENT INSTALLATION ..................................................................................................... 27
2.13 COMBUSTION AIR ............................................................................................................................. 28
2.13.1 Combustion Air From Outside the Building ................................................................................. 28
2.13.2 Combustion Air From Inside The Building ................................................................................... 28
2.13.3 Sealed Combustion ..................................................................................................................... 28
2.13.4 Temporary Combustion Air Filtering During Construction ........................................................... 28
2.14 BENCHMARK PUMP RELAY OPTION .............................................................................................. 29
CHAPTER 3. CONTROL PANEL OPERATION ..................................................................31
3.1 INTRODUCTION ................................................................................................................................... 31
3.2 CONTROL PANEL DESCRIPTION ...................................................................................................... 31
3.3 CONTROL PANEL MENUS .................................................................................................................. 35
3.3.1 Menu Processing Procedure ......................................................................................................... 35
3.4 OPERATING MENU ............................................................................................................................. 36
3.5 SETUP MENU ....................................................................................................................................... 37
3.6 CONFIGURATION MENU .................................................................................................................... 38
3.7 TUNING MENU ..................................................................................................................................... 40
3.8 COMBUSTION CAL MENU .................................................................................................................. 40
3.9 START SEQUENCE ............................................................................................................................. 41
3.10 START/STOP LEVELS ....................................................................................................................... 45
CHAPTER 4. INITIAL START-UP .......................................................................................47
4.1 INITIAL START-UP REQUIREMENTS ................................................................................................. 47
4.2 TOOLS AND INSTRUMENTATION FOR COMBUSTION CALIBRATION .......................................... 47
4.2.1 Tools & Instrumentation ................................................................................................................. 48
4.2.2 Installing Gas Supply Manometer .................................................................................................. 48
4.1.1Accessing the Vent Probe Port ....................................................................................................... 49
4.3 RSI REGULATOR SAFE TEST ............................................................................................................ 49
4.4 NATURAL GAS COMBUSTION CALIBRATION .................................................................................. 51
4.5 UNIT REASSEMBLY ............................................................................................................................ 56
4.6 OVER-TEMPERATURE LIMIT SWITCHES ......................................................................................... 56
4.6.1 Digital Alarm Switch Checks and Adjustments .............................................................................. 57
CHAPTER 5. MODE OF OPERATION ................................................................................61
5.1 INTRODUCTION ................................................................................................................................... 61
5.2 INDOOR/OUTDOOR RESET MODE ................................................................................................... 61
5.2.1 Reset Ratio .................................................................................................................................... 61
5.2.2 Building Reference Temperature ................................................................................................... 61
5.2.3 Outdoor Air Temperature Sensor Installation ................................................................................ 61
5.2.4 Indoor/ Outdoor Startup ................................................................................................................. 61
5.3 CONSTANT SETPOINT MODE ........................................................................................................... 62
5.3.1 Setting the Setpoint ....................................................................................................................... 62
5.4 REMOTE SETPOINT MODES ............................................................................................................. 63
5.4.1 Remote Setpoint Field Wiring ........................................................................................................ 63
5.4.2 Remote Setpoint Startup ............................................................................................................... 64
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