AERCO BMS II BOILER - Manual (Page 60)

PROGRAMMING BMS II
4-10
4.7 SYSTEM INITIALIZATION AND POLLING
In order for the BMS II to recognize the boilers connected to the RS485 Network, Initialization and polling
must be accomplished by performing the following steps:
1. Set the ON/OFF switch on each boiler control panel to ON.
2. Turn on the BMS II by pressing the ON key. The BMS II will automatically poll (recognize) each boiler
at prescribed intervals.
3. Check the yellow REMOTE (REM) LED on each boiler control panel to ensure it is ON. This indicates
that the boiler is now being controlled by the BMS II.
4. If any of the boiler REMOTE LEDs are off, check to ensure that:
(a) Boiler AC power is not turned off
(b) Boiler is not shut down due to a fault.
(c) The RS485 Network connection is not broken.
The BMS II will continuously poll the boilers at prescribed intervals. Therefore, if a boiler is placed off-line
and then placed back on-line, it will again be recognized by the BMS II during the next polling cycle.
4.8 TESTING THE SYSTEM
The following procedure places a load on the system and will begin firing the boilers. At this point it is very
important to make sure the system pumps are running.
After system has been initialized as described in paragraph 4.5, proceed as follows:
IMPORTANT
Prior to performing these tests, view and record the PRESENT
settings stored in the BMS II for HEADER SET MODE and
INTERNAL SETPT. These settings are located in the Field Adjust
Menu and MUST be restored to these values upon completion of
the following tests.
1. Turn off the BMS II by pressing the ON/OFF key. The ON LED will turn off.
2. Using the MENU key, select the FIELD ADJUST MENU and scroll to the HEADER SET MODE
option, The second line of the display will show the current setting stored in memory (CONSTANT
SETPT, OUTDOOR RESET,or REMOTE SETPT).
3. If CONSTANT SETPT is not currently selected, press the CHANGE key. Select the CONSTANT
SETPT mode using the
▲ or ▼ arrow key. When selected, store the change by pressing the ENTER
key.
4. Next, scroll to the INTERNAL SETPT menu option. The second line of the display will show the
current Internal Setpoint temperature (°F) stored in memory.
5. Press the CHANGE key. Set the INTERNAL SETPT temperature to 180°F using the
▲ and ▼ arrow
keys. When set, store the change by pressing the ENTER key.
6. Turn on the BMS II by pressing the ON/OFF key. The ON indicator will light and the boiler plant will
start to operate.