AERCO Modulex E8 Controller (and BCM) For Modulex EXT Boilers - Manual (Page 10)

E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
CHAPTER 2: E8 CONTROLLER AND BCM DESCRIPTION
Page 10 of 108 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0093_0A
PRI: 06/24/2013 Phone: 800-526-0288 GF-136-C
2.2 BCM Features and Functions
The BCM (Boiler Communications Module) is an electronic module in Modulex boilers (one per
burner), which supports full interoperability to BAS (Building Automation Systems) via Modbus
protocol to make remote communications and control possible. In addition, it provides
customers with a remote alarm contact to notify customers of faults detected within any of the
boiler's multiple thermal modules. Finally, in the event the boiler's master controller stops
working, the BCM also takes over operations of the boiler.
As a back-up controller, the BCM further increases the reliability of a product line already known
for its uniquely redundant design. Each Modulex boiler combines between two and seven
independent, pre-assembled thermal modules housed in a common enclosure. Each module
has its own dedicated controller with a combustion safeguard, variable-speed fan, modulating
gas valve, electronic ignition, modulating burner, flow temperature sensor, thermostat and heat
exchanger. The independent operation of these thermal modules increases each boiler's overall
reliability. If a single module requires maintenance or repair, the other module(s) in the boiler
can maintain the system load requirements -- thereby providing a level of redundancy that was
previously only realized in multi-boiler installations.
A photo of the module is shown in Figure 2-2 below. Additional information for the BCM
component can be found in Chapter 7, 9, and 10.
Figure 2-2: BCM (Boiler Control Module)
NOTE
Before operating any menus and functions in the E8, one MUST
perform a one-time entry of items into the initial INSTALLATION
menu. See Section 4.1 for more information about initial setup and
configuration of the E8 Controller.