AERCO Modulex E8 Controller (and BCM) For Modulex EXT Boilers - Manual (Page 77)

E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
CHAPTER 8: BOILER COMMUNICATION MODULE (BCM)
OMM-0093_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 77 of 108
GF-136-C Ph.: 800-526-0288 PRI: 06/24/2013
CHAPTER 8: BOILER COMMUNICATIONS MODULE (BCM)
When installed and enabled, the BCM enhances the range of control functions offered by the
Modulex Boilers. These additional control functions include the following:
• BCM provides a fault relay which energizes when any fault condition occurs in the Modulex
Boiler.
• BCM serves as a Back-up Controller in the event that the primary E8 Controller fails.
• BCM can be selected as the Primary Controller instead of the E8.
• BCM provides a 0-10V output for controlling a VFD primary pump.
• BCM can function as a “Slave” to a “Master” Energy Management System (EMS), Building
Automation System (BAS) or AERCO’s Boiler Management System II (BMS II/AERCO
Control System (ACS) on a Modbus Network.
Following are detailed descriptions of the BCM and each of the additional control functions listed
above.
8.1 BCM Description
The BCM shown in Figure 8-1 is housed in a compact enclosure measuring 4.13” (105 mm) x
3.50” (89 mm). The BCM is installed on the front of the Modulex Boiler, behind the lift-up front
panel.
Figure 8-1: Boiler Communications Module (BCM)
Input/Output (I/O) connections to the BCM are made via four connectors mounted on the
Printed Circuit Board (PCB) of the BCM. Three Control Switches are mounted on the clear
plastic cover on the front of the BCM. Three LED Status Indicators are mounted directly on the
BCM PCB and can be viewed through the clear plastic cover. In addition, the PCB contains an
on-board, screwdriver-adjustable 10-position address switch. The control and indicator
functions are illustrated and described in Figure 8-2.