AERCO SWDW68 U-Tube Double-Wall Heaters w/ECS - Manual (Page 3)

HE-111
− CONTENTS
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TABLE OF CONTENTS
CHAPTER 1 GENERAL INFORMATION
1.1 INTRODUCTION .............................................................................................. 1-1
1.2 MECHANICAL OVERVIEW............................................................................ 1-1
1.3 ELECTRONIC CONTROL SYSTEM ............................................................... 1-2
1.4 OPTIONS AND ACCESSORIES ...................................................................... 1-3
1.4.1 MODBUS Communication Option ........................................................................... 1-3
1.4.2 Accessories ................................................................................................................ 1-3
CHAPTER 2 INSTALLATION
2.1 INTRODUCTION .............................................................................................. 2-1
2.2 RECEIVING, UNPACKING AND INSTALLING ........................................... 2-1
2.3 MAKING THE PIPING CONNECTIONS ........................................................ 2-5
2.4 INSTALLING THE CXT-E ELECTRONIC CONTOL SYSTEM ................... 2-6
2.4.1 Accessing the Control Box Interior ........................................................................... 2-7
2.4.2 Connecting the AC Power to the Control Box .......................................................... 2-8
2.4.3 Wiring the CXT-E Actuator ...................................................................................... 2-9
2.4.4 Verifying the Pre-wired Connections ........................................................................ 2-9
2.4.5 Wiring the Temperature Controller to the MODBUS Control System ..................... 2-9
2.4.6 Control System Programming Information ............................................................. 2-10
CHAPTER 3 FUNCTIONAL DESCRIPTION
3.1 INTRODUCTION .............................................................................................. 3-1
3.2 MECHANICAL DESCRIPTION ....................................................................... 3-1
3.2.1 Overview ................................................................................................................... 3-1
3.2.2 Double-Wall Heat Transfer and Water Leakage ....................................................... 3-2
3.2.3 Principal Mechanical Components ............................................................................ 3-2
3.3 ELECTRONIC CONTROL SYSTEM ............................................................... 3-4
3.3.1 ECS Block Diagram .................................................................................................. 3-4
3.3.2 ECS Operational Summary........................................................................................ 3-5
3.3.3 Over-temperature Condition ...................................................................................... 3-5
3.3.4 Principal ECS Components ....................................................................................... 3-6
CHAPTER 4 ADJUSTMENT
4.1 INTRODUCTION .............................................................................................. 4-1
4.2 ADJUSTING THE ELECTRONIC CXT-E ACTUATOR ................................ 4-1
4.3 ADJUSTING THE ELECTRONIC CONTROL SYSTEM ............................... 4-2
4.3.1 Adjusting the Setpoint Temperature .......................................................................... 4-3
4.3.2 Adjusting the Over-temperature Alarm Limit ........................................................... 4-5
CHAPTER 5 OPERATION
5.1 INTRODUCTION .............................................................................................. 5-1
5.2 PRE-OPERATIONAL ........................................................................................ 5-1
5.3 STARTUP PROCEDURES ................................................................................ 5-1
5.4 SHUTTING DOWN AND DRAINING THE HEAT EXCHANGER ............... 5-3