Service Manual

11
11
Building Management System (BMS)
All water heaters with serial numbers after XA…….. (with ICON Systems) 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.
BMS Mapping
Map Descriptor
Name
Modbus
Register
Read/Write
BACnet
Object ID
Note
Demand source 00006 Read 001
Current demand source:
0 = Unknown
1 = No source demand
2 = CH
3 = DHW
4 = Lead Lag slave
5 = Lead Lag master
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
Firing rate
00008
Read
002
Actual firing rate (% or RPM)
Fan speed
00009
Read
003
RPM
Flame signal
00010
Read
004
0.01V or 0.01 µA precision (0.00-50.00V)
Tank temperature
sensor
00012 Read 005 -40˚-130˚ (0.1˚C precision)
Appliance setpoint
00017
Read
006
-40˚-130˚ (0.1˚C precision)
Burner status 00032 Read 007
0 = Disabled
1 = Locked out
2-3 = Reserved
4 = Anti-short cycle
5 = Unconfigured safety data
6-33 = Reserved
34 = Standby Hold
35 = Standby Delay
Lockout code 00034 Read 008
0 = No lockout
1-4096
Appliance status 00080 Read 009
0 = Unknown
1 = Disabled
2 = Normal
3 = Suspended
DHW priority count 00082 Read 010
Countdown of time when DHW has priority over CH (secs).
Applicable when DHW priority time is enabled.
Burner run time
00130/00131
Read
011
Hours
Controller cycle count
00142/00145
Read
012
0-999,999
Controller run time
00144/00145
Read
013
Hours
Alarm reason 0035 Read 014
0 = None
1 = Lockout
2 = Alert
3 = Other
DHW setpoint
0453
Read/Write
015
40˚-130˚ (0.1˚C precision)