AERCO BMS II BOILER - Manual (Page 7)

CONTENTS
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TABLE OF CONTENTS (cont.)
RAMP DOWN %/MIN ................................................................................................................................... 3-15
LOAD START PCT ........................................................................................................................................ 3-15
LOAD STOP PCT ........................................................................................................................................... 3-15
RESET DEFAULTS ........................................................................................................................................ 3-15
3.13 BMS II QUICK-START GUIDE ................................................................................................................ 3-16
CONSTANT SETPT MODE (Default) ........................................................................................................... 3-16
REMOTE SETPT MODE ............................................................................................................................... 3-17
OUTDOOR RESET MODE ............................................................................................................................ 3-18
CHAPTER 4 - PROGRAMMING BMS II OPERATING MODEs .................................................................. 4-1
4.1 INTRODUCTION ........................................................................................................................................... 4-1
4.2 OUTDOOR RESET MODE ............................................................................................................................ 4-1
Selecting Outdoor Reset Mode .......................................................................................................................... 4-2
Determining Reset Schedule .............................................................................................................................. 4-2
Entering Reset Ratio and Building Reference Temperature .............................................................................. 4-2
Selecting Boiler Operating Mode ...................................................................................................................... 4-3
Entering Boiler Start and Boiler Stop Levels .................................................................................................... 4-3
Entering System Start Temperature ................................................................................................................... 4-3
Entering Load Start Percent (Required Only for Modulex Installations) .......................................................... 4-4
4.3 REMOTE SETPOINT MODE ........................................................................................................................ 4-4
Selecting Remote Setpoint Mode ...................................................................................................................... 4-5
Entering Header High Limit and Low Limit Temperatures............................................................................... 4-5
Selecting Remote Signal Type ........................................................................................................................... 4-5
Selecting Boiler Operating Mode ...................................................................................................................... 4-6
Entering Boiler Start and Boiler Stop Levels .................................................................................................... 4-6
Entering Load Start Percent (Required Only for Modulex Installations) .......................................................... 4-7
4.4 CONSTANT SETPOINT MODE ................................................................................................................... 4-7
Selecting Constant Setpoint Mode ..................................................................................................................... 4-7
Selecting Internal Setpoint Temperature ........................................................................................................... 4-8
Selecting Boiler Operating Mode ...................................................................................................................... 4-8
Entering Boiler Start and Boiler Stop Levels .................................................................................................... 4-8
Entering Load Start Percent (Required Only for Modulex Installations) .......................................................... 4-9
4.5 “TEMP AND LOAD” OPTION ...................................................................................................................... 4-9
4.6 “START ENABLED” OPTION ...................................................................................................................... 4-9
4.7 SYSTEM INITIALIZATION AND POLLING ............................................................................................ 4-10
4.8 TESTING THE SYSTEM ............................................................................................................................. 4-10
CHAPTER 5 - TROUBLESHOOTING ............................................................................................................. 5-1
5.1 FAULT MESSAGES & COMMON PROBLEMS ......................................................................................... 5-1
APPENDIX A - BMS MENUS A-1
APPENDIX B - STATUS AND FAULT MESSAGES B-1
APPENDIX C - METHODS FOR DETERMINING RESET SCHEDULE C-1
APPENDIX D - NTC TEMPERATURE RESISTANCE CHART D-1
APPENDIX E - BMS II WIRING DIAGRAM E-1
APPENDIX F - BMS II PARTS AND ACCESSORIES F-1
APPENDIX G - PROGRAMMING THE BMS II USING RS232 COMMUNICATION G-1
APPENDIX H - BMS II MODBUS ADDRESS ASSIGNMENTS H-1
APPENDIX I - BOILER START AND BOILER STOP LEVELS I-1