Watts AERCO Benchmark BMK5000 - Default Chapter; Table of Contents

Benchmark 750-6000 with Edge [i]: Install-Startup Manual
CONTENTS
OMM-144_B • GF-217 • 5/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 2 of 62
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 .............................................................................................................................. 18
2.5 LIFTING PROVISIONS .......................................................................................................20
2.5.1 BMK750 – 1000 Lifting Provisions .................................................................................................. 20
2.5.2 BMK1500 – 5000N Lifting Provisions ............................................................................................. 22
2.5.3 BMK5000-6000 Lifting Provisions................................................................................................... 22
2.6 SUPPLY AND RETURN PIPING .........................................................................................23
2.6.1 BMK750 – 1000 Supply and Return Piping ..................................................................................... 23
2.6.2 BMK1500 – 5000N Supply and Return Piping ................................................................................ 24
2.6.3 BMK5000 – 6000 Supply and Return Piping ................................................................................... 25
2.7 PRESSURE RELIEF VALVE INSTALLATION ....................................................................25
2.8 CONDENSATE DRAIN AND PIPING ..................................................................................27
2.9 GAS SUPPLY PIPING ........................................................................................................29
2.9.1 Gas Supply Specifications ............................................................................................................... 29
2.9.2 External Gas Supply Regulator ....................................................................................................... 29
2.9.3 Manual Gas Shutoff Valve .............................................................................................................. 32
2.10 AC ELECTRICAL POWER WIRING ..................................................................................33
2.10.1 Electrical Power Requirements .................................................................................................... 33
2.10.2 Power Panel Locations ................................................................................................................. 33
2.10.3 Electrical Power Panel Internal Components ............................................................................... 34
2.11 FIELD CONTROL WIRING – I/O BOARD .........................................................................36
2.11.1 Outdoor Air & Air Sensor Common............................................................................................. 38
2.11.2 AIR TEMP SENSOR ....................................................................................................................... 39
2.11.3 O
2
SENSOR (+ & –) ........................................................................................................................ 39
2.11.4 SPARK SIGNAL (+ & –) .................................................................................................................. 39
2.11.5 ANALOG IN ................................................................................................................................... 39
2.11.6 VALVE FEEDBACK ......................................................................................................................... 39
2.11.7 SHIELD (SHLD & SHLD) ................................................................................................................. 40
2.11.8 ANALOG OUT ............................................................................................................................... 40
2.11.9 RS485 Comm (+, GND, & -) .......................................................................................................... 40
2.11.10 RS232 Comm (TxD & RxD) ......................................................................................................... 40
2.11.11 VFD/Blower (0-10 & AGND) ...................................................................................................... 40
2.11.12 Interlocks ................................................................................................................................... 41