AERCO Control System (ACS) - Manual (Page 11)

MC2: 04/23/13 Page 11 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
1. ACS GENERAL INFORMATION
1.1 SAFETY PRECAUTIONS AND 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 ACS
Controller.
1.2 INTRODUCTION
This manual provides installation, operation and troubleshooting instructions for the AERCO
Control System, Model 5R5-384.
1.3 ACS GENERAL DESCRIPTION
The ACS ( 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 ACS 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 ACS 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 ACS. The pass-thru function permits the remote system to monitor up to 35 operating
parameters from each boiler in the plant.
The ACS 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 ACS 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 ACS 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
has a RS485 Port