AERCO Electronic Controls System (ECS) - Manual (Page 3)

Electronic Control System (ECS) and Type CXT-E Valve
TABLE OF CONTENTS
VD2: 02/28/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 Page 3 of 82
AC-105 OMM-0003_0D
TABLE OF CONTENTS
TABLE OF CONTENTS.................................................................................................. 3
SAFETY PRECAUTIONS ............................................................................................... 5
1. GENERAL INFORMATION ..................................................................................... 7
1.1 INTRODUCTION ................................................................................................................... 7
1.2 ELECTRONIC CONTROL SYSTEM (ECS) ................................................................................. 7
1.2.1 Control Box Assembly............................................................................................................................. 9
1.2.2 Feed-Forward Flow Sensor ................................................................................................................... 11
1.2.3 Outlet Temperature Sensors ................................................................................................................ 11
1.2.4 Heating Fluid Inlet/Outlet Temperature Sensors ................................................................................. 11
1.2.5 Over-Temperature Solenoid Valve ....................................................................................................... 11
1.3 ELECTRONIC CONTROL VALVE CXT-E................................................................................. 12
1.3.1 Control Valve Accessories .................................................................................................................... 12
1.4 REFERENCE DOCUMENTS.................................................................................................. 14
1.4.1 AERCO Documents ............................................................................................................................... 14
1.4.2 Eurotherm Documents – (Available at www.eurotherm.com) ............................................................ 14
2. INSTALLATION ..................................................................................................... 15
2.1 INTRODUCTION ................................................................................................................. 15
2.2 ELECTRONIC CONTROL VALVE TYPE CXT-E INSTALLATION ................................................ 15
2.3 ELECTRONIC CONTROL SYSTEM (ECS) INSTALLATION ....................................................... 17
2.4 CHANGING COMMUNICATION ADDRESSES ON AERCO EUROTHERM TEMPERATURE
CONTROLLER ............................................................................................................................. 21
2.5 ENABLING REMOTE SETPOINT CONFIGURATION ON THE AERCO EUROTHERM
TEMPERATURE CONTROLLER .................................................................................................... 24
3. ADJUSTMENT ...................................................................................................... 25
3.1 INTRODUCTION ................................................................................................................. 25
3.2 CONTROL VALVE TYPE CXT-E ADJUSTMENT ...................................................................... 25
3.3 ELECTRONIC CONTROL SYSTEM (ECS) ADJUSTMENT ........................................................ 27
3.3.1 Setpoint Temperature Adjustment ...................................................................................................... 28
3.3.2 Over-Temperature Alarm Limit Adjustment ........................................................................................ 29
3.3.3 Over-Temperature Switch Sensor Adjustment ..................................................................................... 30
4. OPERATION .......................................................................................................... 31
4.1 INTRODUCTION ................................................................................................................. 31
4.2 PRE-OPERATIONAL CHECKS .............................................................................................. 31
4.3 INITIAL START-UP .............................................................................................................. 31
4.4 CHECKING WATER HEATER FLOW RATE ............................................................................ 32
4.5 CHECKING THE VALVE POSITION OUTPUT IN AUTO MODE ............................................... 32
5. FUNCTIONAL DESCRIPTION .............................................................................. 33
5.1 INTRODUCTION ................................................................................................................. 33
5.2 FUNCTIONAL OVERVIEW ................................................................................................... 33
5.3 OVER-TEMPERATURE CONTROL AND SAFETY FEATURES ................................................. 33
6. ROUTINE MAINTENANCE ................................................................................... 35
6.1 INTRODUCTION ................................................................................................................. 35
6.2 CXT-E CONTROL VALVE ROUTINE MAINTENANCE ............................................................ 35