Building Management System (Bms) - Bradford White eF Series Troubleshooting Manual And Instructions For Service

Building Management System (BMS)

All water heaters with ICON Systems can be equipped with a gateway kit that will facilitate a Building
Management System (BMS) connection to Modbus or Bacnet
factory installed. A full installation, operation, and troubleshooting manual is provided with the
gateway kit.
Before beginning any Troubleshooting operations listed below, please note that the gateway kit and BMS may
need to be disconnected from the heater. Please ensure this has been completed before proceeding with any
troubleshooting operation that may be impacted by settings in the BMS.
BMS Mapping
Map Descriptor
Name
Demand source
Firing rate
Fan speed
Flame signal
Tank temperature
sensor
Appliance setpoint
Burner status
Lockout code
Appliance status
DHW priority count
Burner run time
Controller cycle count
Controller run time
Alarm reason
DHW setpoint
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Modbus
Read/Write
Register
00006 Read
00008 Read
00009 Read
00010 Read
00012 Read
00017 Read
00032 Read
00034 Read
00080 Read
00082 Read
00130/00131 Read
00142/00145 Read
00144/00145 Read
0035 Read
0453 Read/Write
® . This kit is sold separately and is not
CAUTION
BACnet
Object ID
Current demand source:
0 = Unknown
1 = No source demand
2 = CH
3 = DHW
4 = Lead Lag slave
5 = Lead Lag master
001
6 = CH frost protection
7 = DHW frost protection
8 = No demand due to burner switch (register 199) turned off
9 = DHW storage
10 = Reserved
11 = Warm weather shutdown
12 = Hot standby
002 Actual firing rate (% or RPM)
003 RPM
004 0.01V or 0.01 μA precision (0.00-50.00V)
005 -40-130 (0.1C precision)
006 -40-130 (0.1C precision)
0 = Disabled
1 = Locked out
2-3 = Reserved
4 = Anti-short cycle
007
5 = Unconfigured safety data
6-33 = Reserved
34 = Standby Hold
35 = Standby Delay
0 = No lockout
008
1-4096
0 = Unknown
1 = Disabled
009
2 = Normal
3 = Suspended
Countdown of time when DHW has priority over CH (secs).
010
Applicable when DHW priority time is enabled.
011 Hours
012 0-999,999
013 Hours
0 = None
1 = Lockout
014
2 = Alert
3 = Other
015 40-130 (0.1C precision)
Note
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