Table Of Contents - Watts Aerco Benchmark OMM-0116 Installation And Start-Up Manual

Benchmark 750-3000 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 .............................................................................................................................. 17
2.5 LIFTING PROVISIONS ......................................................................................................... 19
2.5.1 BMK 750 - 1000 lifting Provisions .................................................................................................. 19
2.5.2 BMK 1500 - 3000 Lifting Provisions ............................................................................................... 20
2.6 SUPPLY AND RETURN PIPING .......................................................................................... 21
2.6.1 BMK 750 - 1000 Supply and Return Piping .................................................................................... 21
2.6.2 BMK 1500 - 3000 Supply and Return Piping .................................................................................. 21
2.6.3 Dual Inlet Return Piping ................................................................................................................. 22
2.7 PRESSURE RELIEF VALVE INSTALLATION ..................................................................... 23
2.8 CONDENSATE DRAIN AND PIPING ................................................................................... 24
2.9 GAS SUPPLY PIPING .......................................................................................................... 26
2.9.1 Gas Supply Specifications ............................................................................................................... 27
2.9.2 Manual Gas Shutoff Valve .............................................................................................................. 27
2.9.3 External Gas Supply Regulator ....................................................................................................... 28
2.10 AC ELECTRICAL POWER WIRING ................................................................................... 30
2.10.1 Electrical Power Requirements .................................................................................................... 30
2.10.2 Power Box Locations .................................................................................................................... 31
2.10.3 Electrical Power Box Internal Components .................................................................................. 32
2.11 FIELD CONTROL WIRING ................................................................................................. 34
2.11.1 Outdoor Air & Air Sensor Common .............................................................................................. 35
2.11.2 AIR TEMP SENSOR ........................................................................................................................ 36
2.11.3 O SENSOR (+ & -) ........................................................................................................................ 36
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2.11.4 SPARK SIGNAL (+ & -) ................................................................................................................... 36
2.11.5 ANALOG IN ................................................................................................................................... 36
2.11.6 VALVE FEEDBACK .......................................................................................................................... 37
2.11.7 SHIELD (SHLD & SHLD) .................................................................................................................. 37
2.11.8 ANALOG OUT ................................................................................................................................ 37
2.11.9 RS485 Comm (+, GND, & -) ........................................................................................................... 37
2.11.10 RS232 Comm (TxD & RxD) .......................................................................................................... 37
2.11.11 VFD/Blower (0-10 & AGND) ....................................................................................................... 37
2.11.12 Interlocks .................................................................................................................................... 38
2.11.13 Fault Relay (NC, COM, & NO) ..................................................................................................... 38
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OMM-115_D GF-200 5/9/2019
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