AERCO C-More Controls Manual June 2010 - Manual (Page 115)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 115 of 162
OMM-0032_0E Phone: 800-526-0288 GF-112
• Network
When the BST Remote Signal item is set to Network, the setpoint is set by the SSD
Device connected via Modbus connection (see ProtoNode Gateway User Manual,
GF-129).
BST Auto Mstr (Default = disabled)
The BST Auto Mstr item Enables or disables an Automatic BST Master Switch-Over function.
When “BST Auto Mstr” is enabled, the BST will automatically select a new Master if the current
Mater fails or loses power.
NOTE
A Modbus temperature transmitter must be installed in conjunction
with this feature.
BST Auto Timer (Span = 10 sec – 120 sec, Default = 30 sec)
When the BST Auto Mstr option is set Enabled, the BST Auto Timer item allows the user to
select the elapsed time interval between failure of the BST Master and switch-over to a new
BST Master.
Remote Intlk Use (Default = system shutdown)
The Remote Intlk Use item selects the functioning of the Remote Interlock circuit on the I/O Box
as follows:
• Boiler Shutdown
When the Remote Intlk Use item is set to Boiler Shutdown, the boiler whose Remote
Interlock circuit has been opened will be cycled down (shut down) regardless of
whether the unit is a Master or a Slave.
• System Shutdown
When the Remote Intlk Use item is set to System Shutdown, opening the Remote
Interlock of The BST Master unit will cause all units to cycle down (shut down).
Opening the Remote Interlock of any slave unit will only cause the slave unit to shut
down.
If System Shutdown and BST Auto Mstr are both selected, this feature will only
function across all units if ALL of the interlocks are externally connected in series with
dry contact relays.
WARNING!
DO NOT INTER-CONNECT THE REMOTE INTERLOCK OF ONE UNIT TO THE
REMOTE INTERLOCK OF ANOTHER UNIT DIRECLTY, AS THIS WILL CAUSE
DAMAGE TO INTERNAL CIRCUITRY.
One Boiler Mode (Selections = Off, On-Outlet Temp, on-Avg Temp. Default = off)
The One Boiler Mode is a BST Unique and innovative feature that eliminates excessive boiler
cycling during low-flow conditions. When the One Boiler Mode is enabled, The BST will
determine if a low-flow condition exists and will cycle down one boiler at a time, every 15
minutes, until one boiler remains ignited. The BST will then use the remaining ignited boilers’
Outlet Sensor as the new Header temperature. This will eliminate the excessive delays in
utilizing immediate real-time temperature readings, thereby eliminating low-flow related cycling.