Benchmark 750/1000 Boiler
Installation, Operation & Maintenance Manual
OMM-0082_0J
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
3
of
192
GF-130
Ph.: 800-526-0288
05/21/2014
TABLE OF CONTENTS
FOREWORD
................................................................................................................. 7
CHAPTER 1.
SAFETY PRECAUTIONS ..................................................................... 11
1.1 WARNINGS & CAUTIONS ................................................................................................................... 11
1.2 EMERGENCY SHUTDOWN ................................................................................................................. 12
1.3 PROLONGED SHUTDOWN ................................................................................................................. 13
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 .......................................................................................................... 23
2.8.3 External Gas Supply Regulator .................................................................................................... 23
2.8.3.1
Massachusetts Installations Only ......................................................................................... 23
2.8.3.2
All Installations (Except Massachusetts) .............................................................................. 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 Terminals...................................................................................................... 28
2.10.2 COMBUSTION AIR Terminal ...................................................................................................... 29
2.10.3 O
2
SENSOR Terminals ................................................................................................................ 29
2.10.4 SPARK SIGNAL Terminals .......................................................................................................... 29
2.10.5 ANALOG IN Terminals ............................................................................................................... 29
2.10.6 B.M.S. (PWM) IN Terminals ...................................................................................................... 29
2.10.7 SHIELD Terminals ...................................................................................................................... 29
2.10.8 ANALOG OUT Terminals ........................................................................................................... 30
2.10.9 RS-485 Comm Terminals ........................................................................................................... 30
2.10.10 RS-232 Comm Terminals ......................................................................................................... 30
2.10.11 VFD/Blower (0-10 & AGND) .................................................................................................... 30
2.10.12 Interlocks ................................................................................................................................ 30
2.10.12.1
REMOTE INTL’K Terminals................................................................................................ 30
2.10.12.2
DELAYED INTL’K Terminals (OUT & IN) ............................................................................ 30
2.10.13 FAULT RELAY (NC, COM, & NO) Terminals ............................................................................. 31
2.10.14 AUX RELAY CONTACTS (NC, COM, & NO) Terminals .............................................................. 31
2.11 FLUE GAS VENT INSTALLATION ....................................................................................................... 31
2.12 COMBUSTION AIR ............................................................................................................................ 32
2.12.1 Combustion From Outside the Building ................................................................................... 32
