Table Of Contents - Aerco BENCHMARK 2500DF User Manual

Dual fuel gas-fired boiler

Table of Contents

Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual

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 ...................................................................................................... 18

2.6 PRESSURE RELIEF VALVE INSTALLATION .................................................................................. 19

2.7 CONDENSATE DRAIN & PIPING ..................................................................................................... 19

2.8 GAS SUPPLY PIPING....................................................................................................................... 21

2.8.1 Gas Supply Specifications ............................................................................................................................................ 22

2.8.2 Manual Gas Shutoff Valve ............................................................................................................................................ 22

2.8.3 External Gas Supply Regulator ..................................................................................................................................... 22

2.8.3.1 Massachusetts Installations Only .................................................................................... 22

2.8.3.2 All Installations (Except Massachusetts) ......................................................................... 22

2.9 AC ELECTRICAL POWER WIRING ................................................................................................. 23

2.9.1 Electrical Power Requirements ..................................................................................................................................... 24

2.10 FIELD CONTROL WIRING ............................................................................................................. 25

2.10.1 Outdoor Air In (OUT) & Air Sensor Common (COM) .................................................................................................. 27

2.10.2 Combustion Air (AIR [AUX]) ........................................................................................................................................ 27

2.10.3 O

Sensor (O2+ & O2-) ............................................................................................................................................... 28

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 Outputs (+ & -) ................................................................................................................................................ 28

2.10.9 RS485 Comm (+, GND, & -)........................................................................................................................................ 29

2.10.10 RS232 Comm (TxD & RxD) ...................................................................................................................................... 29

2.10.11 VFD/Blower (0-10 & AGND) ...................................................................................................................................... 29

2.10.12 Interlocks ................................................................................................................................................................... 29

2.10.12.1 Remote Interlock In (OUT & IN) .................................................................................. 29

2.10.12.2 Delayed Interlock In (OUT & IN) ................................................................................. 29

2.10.13 Fault Relay (NC, COM, & NO) .................................................................................................................................. 29

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

2.14 SEQUENCING VALVE INSTALLATION ......................................................................................... 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

3.6 CONFIGURATION MENU ................................................................................................................. 40

OMM-0099_0A

GF-145

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913

Ph.: 800-526-0288

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PR1: 05/21/2014