Table of Contents
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Installation, Operation & Maintenance Manual (IOMM)
FOREWORD 7
CHAPTER 1. SAFETY PRECAUTIONS ......................................................................................... 11
1.1 WARNINGS & CAUTIONS ................................................................................................................... 11
1.2 EMERGENCY SHUTDOWN ................................................................................................................. 12
1.3 PROLONGED SHUTDOWN ................................................................................................................. 12
CHAPTER 2. INSTALLATION ........................................................................................................ 15
2.1 INTRODUCTION ................................................................................................................................... 15
2.2 RECEIVING THE UNIT ......................................................................................................................... 15
2.3 UNPACKING ......................................................................................................................................... 15
2.4 SITE PREPARATION ........................................................................................................................... 16
2.4.1 Installation Clearances .................................................................................................................................... 16
2.4.2 Setting the Unit ............................................................................................................................................... 17
2.5 SUPPLY AND RETURN PIPING .......................................................................................................... 19
2.6 PRESSURE RELIEF VALVE INSTALLATION ..................................................................................... 19
2.7 CONDENSATE DRAIN & PIPING ........................................................................................................ 20
2.8 GAS SUPPLY PIPING .......................................................................................................................... 22
2.8.1 Gas Supply Specifications. .............................................................................................................................. 22
2.8.2 Manual Gas Shutoff Valve .............................................................................................................................. 22
2.8.3 External Gas Supply Regulator ........................................................................................................................ 23
2.9 AC ELECTRICAL POWER WIRING ..................................................................................................... 24
2.9.1 Electrical Power Requirements ....................................................................................................................... 25
2.10 FIELD CONTROL WIRING ................................................................................................................. 26
2.10.1 Outdoor Air In (OUT) & Air Sensor Common (COM) .................................................................................... 27
2.10.2 COMBUSTION AIR Terminal .......................................................................................................................... 28
SENSOR (O2+ & O2-) ................................................................................................................................ 28
2
2.10.4 SPARK SIGNAL (FLW+ & FLW-) ...................................................................................................................... 28
2.10.5 Analog In (+ & -) ............................................................................................................................................ 28
2.10.6 B.M.S. (PWM) In (BMS+ & BMS-) .................................................................................................................. 28
2.10.7 Shield (SHLD & SHLD) .................................................................................................................................... 28
2.10.8 Analog Output (+ & -) ................................................................................................................................... 28
2.10.9 RS-485 Comm (+, GND, & -) .......................................................................................................................... 29
2.10.10 RS-232 Comm (TxD & RxD) ......................................................................................................................... 29
2.10.11 VFD/Blower (0-10 & AGND) ........................................................................................................................ 29
2.10.12 Interlocks .................................................................................................................................................... 29
2.10.13 Fault Relay (NC, COM, & NO) ...................................................................................................................... 30
2.10.14 Auxiliary Relay Contacts (NC, COM, & NO) ................................................................................................. 30
2.11 FLUE GAS VENT INSTALLATION ..................................................................................................... 30
2.12 COMBUSTION AIR ............................................................................................................................. 30
2.12.1 Combustion From Outside the Building ....................................................................................................... 31
2.12.2 Combustion Air from Inside the Building ...................................................................................................... 31
2.13 DUCTED COMBUSTION AIR ............................................................................................................. 31
CHAPTER 3. OPERATION .............................................................................................................. 33
3.1 INTRODUCTION ................................................................................................................................... 33
3.2 CONTROL PANEL DESCRIPTION ...................................................................................................... 33
3.3 CONTROL PANEL MENUS .................................................................................................................. 37
3.3.1 Menu Processing Procedure ........................................................................................................................... 37
3.4 OPERATING MENU ............................................................................................................................. 39
3.5 SETUP MENU ....................................................................................................................................... 39
OMM-0097_0C
GF-142
Benchmark 1500 - 2000 Boilers
TABLE OF CONTENTS
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
Page 3 of 184
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