Modulex EXT Commercial Series Boilers User Manual
CHAPTER 5: E8 Controller and BCM Modules
OMM-0095_0H
AERCO International, Inc.
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100 Oritani Dr.
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Blauvelt, NY 10913
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77
of
144
GF-139
Phone: 800-526-0288
09/15/2017
CHAPTER 5:
E8 CONTROLLER AND BCM MODULES
MODULEX boilers contain advanced and reliable electronic controls, the E8 Controller and the
BCM (Boiler Communications Module), which provide comprehensive programming and
monitoring of the MODULEX boiler and its functions. Features and functions of the E8 Controller
and BCM are described in this chapter.
CAUTION!
This chapter instructs how to operate and navigate the E8 Controller menus, sub-menus, and
parameters, as well as describing the functions of the BCM (Boiler Control Module).
However, before the boiler may be used, the E8 controller MUST be first initialized by
entering language, year, month, day, and hour in the Installation Menu, as described in
Chapter 6, section 6.1.
5.1 E8 CONTROLLER
A standard component included in MODULEX units, the E8 Controller is responsible for the
staging and modulation of individual thermal heating modules in a MODULEX boiler and also
monitors supply and return water temperatures and domestic hot water zones.
The E8 Controller is housed in a compact enclosure measuring 5.7” (145 mm) x 3.9” (100 mm).
The Controller is mounted on the front of the MODULEX Boiler and contains all of the controls,
indicators and displays necessary to adjust, operate and troubleshoot the MODULEX Boiler.
The main components of the closed E8 Controller include the display, door, and data wheel
(see Figure 5-1).
5.1.1 E8 Controller Features and Functions
The E8 features the following functions for MODULEX boilers:
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Shares the heating load among as many of the boiler's thermal heating modules as
possible, maximizing the overall operating efficiency of the boiler.
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Provides access to all testing/programming parameters of each individual heating module:
operation test, operation time, boiler freeze protection and pump's anti seize program.
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Drives lead-lag burner operation based on operating hours. The boiler module with the least
burner operating hours is the first to start and the burner with the most operating hours is the
first to stop.
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Supports DHW (Domestic Hot Water) production using a dedicated sensor to control a
dedicated pump or 3-way diverting valve for storage tank temperature control.
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Supports a manual operation service mode to control individual modules during
troubleshooting or combustion calibration procedures.
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Drives diagnostics such as relay and senor testing.
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Supports Modbus integration with AERCO BMS II and AERCO Control System (ACS) or
Building Automation Systems. AERCO also offers a Communication Gateway to support
BACnet, Lonworks and N2 system integration.
