AERCO BMS II BOILER - Manual (Page 61)

PROGRAMMING BMS II
4-11
7. Using the MENU key on the BMS II, scroll to the OPERATING MENU. The first line of the display will
show the Header Temperature. The second line of the display will show the Firing Rate % and the
number of Units (boilers) firing.
8. When all boilers have reached at least a 55% firing rate, any boilers that have not started have not
been identified by the BMS II.
9. Remember that in the Sequential mode, the BMS II turns boilers on in 30-second intervals. Therefore,
in a 6-boiler plant, with five boilers operating at 55% capacity, a boiler that has not started after 3
minutes has not been recognized. In parallel mode, all boilers will start at the same time.
10. This completes the System Test. Return the HEADER SET MODE and INTERNAL SETPT settings to
their previously stored values.
11. If the System Test is not completed successfully, refer to the troubleshooting procedures in this
manual (Chapter 5) and the applicable O & M Manuals for the boilers included in the boiler plant. If
the problem can still not be resolved, contact AERCO at 1-800-526-0288.
CAUTION
Monitor the HDR TEMP reading to ensure it is not ramping up too
high. If it is, press the ON/OFF key of the BMS II to shut down the
boilers. Remember that the boiler outlet temperature may be
higher than the BMS II header temperature.
NOTE
When a Building Automation System (BAS) is connected to
monitor the BMS II, ensure that the RS232 Menu is configured
properly.
If the boilers connected to the BMS II are to be monitored by the
BAS, ensure that the MODBUS PASS THRU option in the RS232
Menu is enabled.