AERCO Control System (ACS) - Manual (Page 3)

MC2: 04/23/13 Page 3 of 144
GF-131
AERCO Control System (ACS)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installation, Operation, and Maintenance Manual
OMM-0081_0D
Table of Contents
FOREWARD ................................................................................................................... 9
PHRASES, ABBREVIATIONS & ACRONYMS .......................................................... 9
1. ACS GENERAL INFORMATION ........................................................................... 11
1.1 SAFETY PRECAUTIONS AND WARNINGS .................................................. 11
1.2 INTRODUCTION .............................................................................................. 11
1.3 ACS GENERAL DESCRIPTION ...................................................................... 11
1.4 ACS FEATURES ............................................................................................. 12
1.4.1 Simplified Installation and Set-Up ........................................................... 12
1.4.2 User-Friendly Control System Interface ................................................. 12
1.4.3 Retention of Menu Option Settings ......................................................... 13
1.4.4 Application Flexibility .............................................................................. 13
1.4.5 Sequential or Parallel Operation ............................................................. 13
1.4.6 Accuracy ................................................................................................ 13
1.4.7 Bumpless Transfer ................................................................................. 13
1.4.8 Fault Alarm Surveillance ........................................................................ 13
1.4.9 ACS Programming Via RS232 Port. ....................................................... 13
2. ACS INSTALLATION ............................................................................................. 15
2.1 INTRODUCTION .............................................................................................. 15
2.2 SITE SELECTION AND MOUNTING .............................................................. 15
2.2.1 Mounting the ACS .................................................................................. 15
2.3 SITE SELECTION AND MOUNTING .............................................................. 16
2.4 POWER WIRING ............................................................................................. 17
2.5 SENSOR INSTALLATION AND WIRING ........................................................ 18
2.5.1 Header Sensor Installation ..................................................................... 19
2.5.2 Return Sensor Installation ...................................................................... 19
2.5.3 Outdoor Air Sensor Installation............................................................... 20
2.6 RS485 (MODBUS) WIRING AT THE ACS ...................................................... 22
2.6.1 ACS Bias Switches & Loop Termination Resistors ................................. 22
2.7 RS485 (MODBUS) WIRING, BIAS, AND TERMINATION AT AERCO
BOILERS ................................................................................................................... 23
2.7.1 RS485 Wiring, Termination& Bias for Benchmark Series and KC1000 Boilers . 23
2.7.2 RS485 Wiring for Modulex Series Boilers .............................................. 29
2.8 SAMPLE RS485 (MODBUS) NETWORK DIAGRAMS ................................... 30
2.9 RS485 WIRING AT THE ACS ......................................................................... 31