Bradford White UCG100H199 Installation & Operation Manual page 26

Building Management System (BMS)
The water heater can be equipped with a gateway kit that will facilitate a Building Management System (BMS) connection
to Modbus or Bacnet ® . This kit is sold separately and is not 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 00130/00131
Controller cycle
00142/00145
count
Controller run time 00144/00145
Alarm reason
DHW setpoint
Modbus
Read/Write
Register
00006 Read
00008 Read
00009 Read
00010 Read
00012 Read
00017 Read
00032 Read
00034 Read
00080 Read
00082 Read
Read
Read
Read
0035 Read
0453 Read/Write
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)
26
Note