AERCO XPC GATEWAY Communications - Manual (Page 64)

GATEWAY COMMUNICATIONS MANUAL
64
SECTION 4 AERCO XPC GATEWAY TO BCM
CONTROLLED MODULEX BOILERS
4.1 CONNECTION AND SET-UP OF BOILER COMMUNICATIONS MODULES (BCMS)
The BCM is used to provide Modbus (RS485) connectivity for AERCO Modulex Series Boilers. When
equipped with BCMs, the Modulex Boilers can be monitored and/or controlled by a BAS via the AERCO
XPC Gateway. Modbus (RS485) connections are made at BCM connector Y2. Proceed as follows to
access the BCM wiring connections:
1. Disconnect all power from the Modulex Boiler.
2. Remove the top and front covers from the Modulex Boiler to provide access to the BCM.
3. Refer to Figure 4-1 and locate the BCM switches on the front of the unit.
4. Remove the four screws securing the BCM mounting bracket and separate the bracket from the back
of the panel to provide access to the BCM connectors.
5. Locate the Modbus wiring connections on BCM connector Y2 (Figure 4-2).
6. Proceed to subsection 4.2 and wire the BCM to the appropriate XPC port connector for the
application being used.
Figure 4-1. Modulex Boiler With BCM