AERCO C-More Controls Manual June 2010 - Manual (Page 121)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 121 of 162
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BST Reset Ratio (Span = 0.1 – 9.9, Default = 1.2)
The BST Reset ratio is an adjustable number from 0.1 to 9.9. Once adjusted, the supply header
temperature will increase by that number for each degree that the outside air temperature
decreases. For instance, if a reset ratio of 1.6 is used, for each degree that outside air
temperature decreases, the supply header temperature will increase by 1.6 degrees.
The BST Reset Ratio is adjustable from 0.1 to 9.9. Default is 1.2.
(See Appendix C for Reset Ratio, Header Temperature setup charts)
System Start Tmp (Span = 30°F - 120°F, Default = 60°F)
The System Start Temperature feature allows the BST to be enabled or disabled based on the
outside air temperature. When the outside air temperature goes below the System Start
Temperature, the BST is enabled. When the outside air temperature is above the System Start
Temperature, the BST is disabled. (Warm weather shut-down). This feature requires that an
outdoor air temperature sensor be connected to the boiler.
9.5.6 BST COMM MENU
Comm Address (Span = 0 – 127, Default = 0)
The Comm Address is the Modbus Address assigned to this unit. Each unit on the Modbus
Network must be assigned a unique address between 1 and 127.
Address 0 disables the unit.
BST Min Addr (Span = 0 – 127, Default = 0)
The BST Min Addr is the lowest Modbus address, between 1 and 127, assigned to any boiler
unit in the Modbus network.
BST Max Addr (Span = 0 -127, Default = 0)
The BST Max Addr is the highest Modbus address, between 1 and 127, assigned to any boiler
unit in the Modbus network.
SSD Address (Default = 0)
The SSD Address is the Modbus address, between 10 and 127, assigned to the PROTONODE
SSD Device. This device is used when the BST Master needs to communicate with a building
automation system (BAS).
Err Threshold (Span = 1-9, Default = 5)
The Err threshold specifies the maximum number of successive Modbus Comm errors allowed
before invoking the Modbus Comm fault.
SSD Temp Format (Selections = Degrees - Points, Default = Degrees)
The SSD Temp Format selects the temperature data format employed in communications
between the BST Master and the SSD.
Selecting Degrees will format the temperature data in Degrees.
Selecting Points will format the temperature data in Points format, described in the Modbus
Point List section of Appendix A, below.