Table Of Contents - Watts Aerco Benchmark OMM-0124 Installation And Start-Up Manual

Benchmark 5000-6000 Boiler Installation & Startup Manual
CONTENTS

TABLE OF CONTENTS

FOREWORD .................................................................................................... 5
SECTION 1: SAFETY PRECAUTIONS.................................................................. 9
1.1 WARNINGS & CAUTIONS ..................................................................................................................... 9
1.2 EMERGENCY SHUTDOWN ................................................................................................................. 10
1.3 PROLONGED SHUTDOWN ................................................................................................................. 10
1.4 IMPORTANT - FOR MASSACHUSETTS INSTALLATIONS ............................................................... 11
SECTION 2: INSTALLATION ........................................................................... 13
2.1 INTRODUCTION ................................................................................................................................... 13
2.2 RECEIVING THE UNIT ......................................................................................................................... 13
2.3 UNPACKING ......................................................................................................................................... 13
2.4 SITE PREPARATION ........................................................................................................................... 14
2.4.1 Installation Clearances ................................................................................................................... 14
2.4.2 Setting the Unit ............................................................................................................................... 16
2.4.3 LIFTING PROVISIONS .................................................................................................................. 17
2.4.4 MULTIPLE UNIT INSTALLATIONS ............................................................................................... 17
2.5 SUPPLY AND RETURN PIPING .......................................................................................................... 17
2.6 PRESSURE RELIEF VALVE INSTALLATION ..................................................................................... 19
2.7 PRESSURE/TEMPERATURE GAUGE INSTALLATION ..................................................................... 19
2.8 CONDENSATE DRAIN AND PIPING ................................................................................................... 20
2.9 GAS SUPPLY PIPING .......................................................................................................................... 22
2.9.1 Gas Supply Specifications .............................................................................................................. 22
2.9.2 Manual Gas Shutoff Valve .............................................................................................................. 22
2.9.3 External Gas Supply Regulator ...................................................................................................... 22
2.10 AC ELECTRICAL POWER WIRING ................................................................................................... 24
2.10.1 Electrical Power Requirements .................................................................................................... 24
2.10.2 Power Box Location...................................................................................................................... 24
2.11 FIELD CONTROL WIRING ................................................................................................................. 26
2.11.1 Outdoor Air & Air Sensor Common .............................................................................................. 27
2.11.2 AIR TEMP SENSOR .................................................................................................................... 28
SENSOR (+ & -) ..................................................................................................................... 28
2.11.3 O
2
2.11.4 SPARK SIGNAL (+ & -) ............................................................................................................... 28
2.11.5 ANALOG IN .................................................................................................................................. 28
2.11.6 VALVE FEEDBACK...................................................................................................................... 28
2.11.7 SHIELD (SHLD & SHLD) ............................................................................................................. 29
2.11.8 ANALOG OUT .............................................................................................................................. 29
2.11.9 RS485 Comm (+, GND, & -) ......................................................................................................... 29
2.11.10 RS232 Comm (TxD & RxD) ....................................................................................................... 29
2.11.11 VFD/Blower (0-10 & AGND) ....................................................................................................... 29
2.11.12 Interlocks .................................................................................................................................... 29
2.11.13 Fault Relay (NC, COM, & NO) ................................................................................................... 30
2.11.14 Auxiliary Relay Contacts (NC, COM, & NO) .............................................................................. 30
2.12 FLUE GAS VENT INSTALLATION ..................................................................................................... 31
2.12.1 MASSACHUSETTS INSTALLATIONS ........................................................................................ 31
2.13 COMBUSTION AIR ............................................................................................................................. 32
2.13.1 DUCTED COMBUSTION AIR ...................................................................................................... 32
2.14 BENCHMARK PUMP RELAY ............................................................................................................. 32
2.15 SEQUENCING ISOLATION VALVE INSTALLATION ........................................................................ 34
SECTION 3: START SEQUENCE ....................................................................... 37
OMM-0123_E • GF-207 • 12/17/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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