Name: Aerco Benchmark 1.5LN
Brand: Aerco
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PR1: 10/18//12 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 1 of 166

Benchmark 1.5LN Low NOx Boiler

Installation, Operation and Maintenance Manual

OMM-0041_0E

GF-120

USER MANUAL

Modulating, Condensing,

Forced Draft, Hot Water Boiler

1,500,000 BTU/H Input

Applicable for Serial Numbers:

G-12-1953 and above.

Revised: 10/18/2012

Benchmark 1.5LN Low NOx Boiler

Installation, Operation, and Maintenance

Benchmark 1.5LN

Low NOx Boiler

Default Chapter3
- Table of Contents3
Chapter 1. Safety Precautions9
- Warnings & Cautions9
- Emergency Shutdown10
- Prolonged Shutdown10
- Installation, Operation and Maintenance Manual GF12
Chapter 2. Installation13
- Introduction13
- Receiving the Unit13
- Unpacking13
- Site Preparation14
  - Installation Clearances14
  - Setting the Unit15
- Supply and Return Piping16
- Condensate Drain16
  - Exhaust Manifold Condensate Drain17
- Gas Supply Piping18
- Ac Electrical Power Wiring20
  - Electrical Power Requirements21
- Modes of Operation and Field Control Wiring22
- I/O Box Connections24
- Flue Gas Vent Installation27
- Combustion Air28
- Benchmark Pump Relay Option29
Chapter 3. Control Panel Operation31
- Introduction31
- Control Panel Description31
- Control Panel Menus35
  - Menu Processing Procedure35
- Operating Menu36
- Setup Menu37
- Configuration Menu38
- Tuning Menu40
- Combustion Cal Menu40
- Start Sequence41
- Start/Stop Levels45
Chapter 4. Initial Start-Up47
- Initial Start-Up Requirements47
- Tools and Instrumentation for Combustion Calibration47
- Rsi Regulator Safe Test49
- Natural Gas Combustion Calibration51
- Unit Reassembly56
- Over-Temperature Limit Switches56
  - Digital Alarm Switch Checks and Adjustments57
Chapter 5. Mode of Operation61
- Introduction61
- Indoor/Outdoor Reset Mode61
- Constant Setpoint Mode62
  - Setting the Setpoint62
- Remote Setpoint Modes63
  - Remote Setpoint Field Wiring63
  - Remote Setpoint Startup64
- Direct Drive Modes64
  - Direct Drive Field Wiring65
  - Direct Drive Startup65
- Boiler Management System (Bms)65
  - BMS External Field Wiring66
  - BMS Setup and Startup66
- Combination Control System (Ccs)66
  - Combination Control System Field Wiring67
  - Combination Control System Setup and Startup67
Chapter 6. Safety Device Testing69
- Testing of Safety Devices69
- Low Gas Pressure Fault Test69
- High Gas Pressure Test70
- Low Water Level Fault Test71
- Water Temperature Fault Test71
- Interlock Tests73
  - Remote Interlock73
  - Delayed Interlock73
- Flame Fault Tests73
- Air Flow Fault Tests75
- Ssov Proof of Closure Switch76
- Purge Switch Open During Purge76
- Ignition Switch Open During Ignition77
- Safety Pressure Relief Valve Test78
Chapter 7. Maintenance79
- Maintenance Schedule79
- Igniter-Injector80
- Flame Detector82
- Combustion Calibration & Rsi Regulator Adjustment82
  - RSI Regulator Pressure82
- Safety Device Testing85
- Burner Assembly Inspection85
- Condensate Drain Trap88
- Shutting the Boiler down for an Extended Period of Time89
- Placing the Boiler Back in Service after a Prolonged Shutdown90
Chapter 8. Troubleshooting Guide91
- Introduction91
- Additional Faults Without Specific Fault Messages101
Chapter 9. Rs232 Communication105
- Running a Command on a Remote Machine Using Putty106
- Rs232 Communication Setup107
- Data Logging108
  - Sensor Log109
Appendix A: Menu Item Descriptions118
Appendix B: Startup, Status and Fault Messages118
Appendix C: Sensor Temperature Resistance121
Appendix D: Indoor/Outdoor Reset Ratio Charts126
Appendix E: Boiler Default Settings126
Appendix F: Part and Dimensional Drawings129
Appendix G: Piping Drawings145
Appendix H: Wiring Schematics151
Appendix I: Recommended Periodic Testing Check List157
Appendix J: Benchmark Control Panel Features159
Appendix K: Recommended Spare Parts Lists161

Aerco Benchmark 1.5LN User Manual

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Brand	Aerco
Model	Benchmark 1.5LN
Category	Boiler
Language	English