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MC2: 04/23/13 Page 35 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

Figure 2-14a shows sample wiring diagram of the relay box wiring and Figure 2-14b shows the

wiring to the ACS unit for a two-valve combination system. Your actual wiring may vary

depending on the type of valves being used:

Figure 2-14a: Wiring of the Relay Box (to the AERCO Control System (ACS)

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 143 144

USER MANUAL 1
Table of Contents 3
FOREWARD 9
AERCO Control System (ACS) 10
1. ACS GENERAL INFORMATION 11
1.4 ACS FEATURES 12
2. ACS INSTALLATION 15
2.4 POWER WIRING 17
AERCO BOILERS 23
MODBUS B (+) 29
MODBUS A (-) 29
2.9 RS485 WIRING AT THE ACS 31
CAUTION 32
2.13 4-20 MA WIRING 33
2.16 RELAY PANEL COMPONENTS 39
2.17 RELAY PANEL OPERATION 40
3.1 INTRODUCTION 43
3.3 ACS MENU STRUCTURE 45
CALIBRATION 46
LEVEL 1 PWD 46
LEVEL 2 PWD 46
3.4 OPERATING MENU 47
OMM-0081_0D 48
3.6 RS232 MENU 49
3.7 RS232 MENU 50
3.8 FIELD ADJUST MENU 51
3.9 CONFIGURATION MENU 53
3.10 BOOST TEMP 57
3.11 TUNING MENU 58
3.12 RELAY MENU 60
3.13 CALIBRATION MENU 61
4.1 INTRODUCTION 67
4.2 OUTDOOR RESET MODE 67
4.3 REMOTE SETPOINT MODE 71
4.4 CONSTANT SETPOINT MODE 74
4.5 “Temp and Load” Option 76
4.6 “Start Enabled” Option 77
4.8 Testing the System 78
5. TROUBLESHOOTING 81
APPENDIX A: ACS MENUS 85
OUTDOOR RESET RATIO CHARTS 105
RESISTANCE 111
COMMUNICATION 117
G.4 PROGRAMMING PROCEDURE 119
ASSIGNMENTS 127
Change Log 144

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