![background image](http://html.mh-extra.com/html/carrier/bwmaan000050/bwmaan000050_installation-operation-and-maintenance-manual_2562172058.webp)
58
APPENDIX A - CONTROL MODULE
2.4 Sequence of Operation
Operational State
User Interface Display
Explanation
Boiler operates in standby mode
until demand for Central Heat (CH)
or Domestic Hot Water (DHW) is
detected.
CH or DHW pump is turned on
based on type of heating demand.
(CH call is illustrated)
Control Module compares sup-
ply temperature to set point.
Boiler proceeds to ignition if supply
temperature is less than set point.
Combustion Air Blower speed
modulates to prepurge setting for
15 seconds.
Sparking initiated sequence.
Heat
Demand?
DHW CH
Pump on
Supply
Temperature
<Setpoint?
15 Second
Prepurge
Ignition
Sparking
No
Yes
No
Yes
After 2 seconds
Summary of Contents for BWMAAN000050
Page 46: ...46 13 TROUBLE SHOOTING ...
Page 48: ...48 13 TROUBLE SHOOTING ...
Page 53: ...53 14 WIRING DIAGRAM 14 1 Connection Diagram ...
Page 54: ...54 14 WIRING DIAGRAM 14 2 Schematic Diagram of Ladder Form ...
Page 60: ...60 APPENDIX A CONTROL MODULE ...
Page 61: ...61 APPENDIX A CONTROL MODULE ...
Page 64: ...64 APPENDIX A CONTROL MODULE ...
Page 70: ...70 NOTES ...
Page 71: ...71 Date Service Performed Company Name Tech Initials Company Address Phone ...
Page 72: ...CAC BDP 7310 West Morris St Indianapolis IN 48231 ...