AERCO BMS II BOILER - Manual (Page 9)

GENERAL INFORMATION
1-1
CHAPTER 1 - GENERAL INFORMATION
1.1 SAFETY PRECAUTIONS & WARNINGS
The Warnings and Cautions appearing throughout this manual should be reviewed and thoroughly
understood prior to attempting to install, operate, troubleshoot or repair the BMS II.
1.2 INTRODUCTION
This manual provides installation, operation and troubleshooting instructions for the AERCO Boiler
Management System, Model 5R5-384. Since this Model is the second generation of AERCO’s Boiler
Management System (BMS) line, this Model is referred to as the BMS II throughout this document.
1.3 BMS II GENERAL DESCRIPTION
The BMS II (Figure 1-1) is a rugged, flexible controller designed to stage and coordinate the operation of
up to 32 AERCO Benchmark Series, Modulex Series or KC1000 Boilers while maximizing operational
efficiency. Under normal load conditions, the BMS II can precisely regulate the header temperature of the
boiler plant within ±2°F.
Boiler plant control is accomplished via a RS485 network utilizing Modbus protocol. For facilities that have
taken a building-wide approach to energy efficiency, the BMS II can be easily integrated with an Energy
Management System (EMS) or Building Automation System (BAS) utilizing Modbus protocol. Physical
connection to the remote EMS or BAS is accomplished via an RS232 interface. EMS/BAS integration will
also permit utilization of the pass-thru function incorporated in the BMS II. The pass-thru function permits
the remote system to monitor up to 35 operating parameters from each boiler in the plant.
The BMS II is housed in a NEMA 13 enclosure. A hinged clear-plastic cover over the unit’s panel controls
protects against incidental contact of control settings and provides a degree of protection against airborne
debris and the spraying or splashing of water. The physical dimensions, weight and electrical power
requirements for the BMS II are as follows:
Dimensions 9.50” W x 7.25” H x 4.00” D
Weight 3 lbs.
Power Requirements 85-to-265 VAC, Single-Phase, 50-60 Hz @ 1A
Each BMS II shipment includes a Header Sensor Kit, Part No. GM-122790 which is required for all modes
of operation. Other available options which can be ordered with your shipment include:
Outdoor Air Sensor Kit,
Part No. GM-122781 Required for Outdoor Reset Mode Operation
Return Sensor Kit,
Part No. 122790
(Same as Header Sensor Kit) Used for external monitoring of boiler water return
temperature
RS485-to-RS232 Converter, Part
No 124943 For use with EMS or BAS equipment that do not include
a RS232 Port