AERCO Control System (ACS) - Manual (Page 9)

MC2: 04/23/13 Page 9 of 144
GF-131
AERCO Control System (ACS)
Installation, Operation, and Maintenance Manual
OMM-0081_0D
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
FOREWARD
The AERCO Control System (ACS) is AERCO’s solution for a flexible boiler plant controller. The
system can control a boiler plant comprised of AERCO Benchmark Series, Modulex Series or
KC1000 Boilers. The ACS can stage and coordinate the operation of up to thirty-two (32)
AERCO Boilers with maximized efficiency. With individual boilers with turn-down ratios as high
as 20:1, a 5-boiler plant can deliver a system turn-down ratio of 100:1 when the boilers are
staged to operate sequentially.
The ACS can also be used in a combination boiler plant to both supply building heat and also
heat water for domestic applications. There are multiple options built in to do this. Some of
these options require a mated AERCO Relay Box to be installed along with the ACS in order to
effectively and safely control the supporting hydronic valves and their interaction with the
boilers.
The ACS is fully compatible with a wide array of Building Automation Systems (BAS) or Energy
Management Systems (EMS) utilizing Modbus Protocol. The BAS or EMS communicates with
the ACS utilizing a RS232 interface. If the BAS or EMS uses a RS485 port, the ACS can be
ordered with a RS485-to-RS232 Converter which can be easily installed within the ACS wiring
compartment.
PHRASES, ABBREVIATIONS & ACRONYMS
The phrases, abbreviations and acronyms used in this document are listed in the following
table:
Phrases, Abbreviations and Acronyms
Phrase, Abbreviation or
Acronym
Meaning
A (Amp) Ampere
ACS AERCO Control System
ADDR Address
ALRM Alarm
AUX Auxiliary
BAS
Building Automation System, often used interchangeably with EMS (see
below)
Baud Rate
Symbol rate, or simply the number of distinct symbol changes (signaling
events) transmitted per second. It is not equal to bits per second, unless
each symbol is 1 bit long.
BCM Boiler Control Module used with AERCO Modulex Series Boilers
BLR Boiler
BND Band
Bias Resistors
A pair of resistors used to force the communication line to a definite logic
state so that noise is not picked up as invalid data during communication.
BLDG (Bldg) Building
C-More Controller
(or Control Box)
A control system developed by AERCO and currently used in all
Benchmark and KC1000 Series product lines.
CNTL Control
DHW Domestic Hot Water
DYN Dynamic
EMS Energy Management System; often used interchangeably with BAS
Ethernet A computer networking technology for Local Area Networks (LANs)