AERCO BMS 168 - Manual (Page 7)

Section 1 ______________________________
About Your
New Boiler
Management
System (BMS)
AERCO’s Boiler Management System
(BMS), stages and modulates AERCO KC
Series and Benchmark Boilers, allowing
them to operate efficiently as a system. It
provides a broad array of operating modes,
so that the nuances of specific applications
can be easily accommodated. The BMS can
control up to 40 boilers; 8 via pulse width
modulation (PWM) and up to 32 via Modbus
(RS485) communication. For Modbus
control, the AERCO Boilers must be
equipped with C-More Control Systems.
P
RECISE
C
ONTROL
Utilizing PWM or Modbus control, the BMS
fully exploits the condensing and modulating
ability and efficiency of each boiler and
regulates the output of the boiler plant with
water supply temperature variation of no
more than ±2°F
Staging can be performed sequentially or in
parallel. The BMS can sample building
reference temperatures to modulate boiler
plant output, and will perform water supply
temperature night setback automatically
referenced to its internal clock.
S
IMPLE
I
NSTALLATION AND
O
PERATION
Installation of the BMS is simple, and low-
voltage wiring is employed between the
BMS panel and boiler modules. There are
no complex design steps to be performed,
since a keypad in conjunction with the LCD
allows the operator to acquire, change, and
program settings through easy-to-use
labeled buttons. Each BMS function
consists only of selecting the function and
toggling values, which generally requires no
more than pressing four keys.
The instant a parameter is programmed, it is
automatically entered into the BMS
memory, avoiding multiple programming
steps to store information. In the event of
power loss, most factory default settings
remain in nonvolatile memory for up to 10
years and need not be reprogrammed.
However, date and time remain in memory
for about 30 days.
BMS P
ROGRAMMING
V
IA
RS232 P
ORT
If desired, the BMS can be programmed by
connecting a Laptop Computer, or other
type of terminal emulation device, to the
RS232 connector on the left side of the
BMS. See Appendix J for programming
using RS232 communication.
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