AERCO C-More Controls Manual June 2010 - Manual (Page 101)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 101 of 162
OMM-0032_0E Phone: 800-526-0288 GF-112
When there is a demand, the Master unit will light off one of the boilers based on the BST
Sequencing selection in the BST menu. As system load increases and the valve position of the
ignited units reach the Next On VP (% valve position), the BST master will light off the next
available unit. A simplified block diagram of multiple boilers connected to a BST is shown in
Figure 9-1 below.
Figure 9-1. Simplified BST Block Diagram
NOTE
The header temperature sensor is either connected directly to the
BST Master’s FFWD connector or to the optional Modbus
transmitter. The Modbus transmitter with header temp sensor is
accessible to any unit on the Modbus bus. The ability to read the
header temperature from any unit is required for the automatic
failover feature.