AERCO BMK 1000 - Manual (Page 143)

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
APPENDIX A – BOILER MENU ITEM DESCRIPTIONS
OMM-0082_0J AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 143 of 192
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APPENDIX A: BOILER MENU ITEM DESCRIPTIONS – Continued
MENU LEVEL & OPTION DESCRIPTION
CONFIGURATION MENU (Cont.)
Deadband High
Deadband Low
Deadband High and Deadband Low settings create an
“Outlet Temperature” Zone in which no Valve Position
corrections will be attempted.
The Deadband ZONE is defined as operating with an
Outlet Temperature between Active Setpoint +
Deadband High and Active Setpoint – Deadband Low.
When the Outlet Temperature reaches Active Setpoint
and remains there for a period of 15 seconds, the unit
will go into a DEADBAND MODE at which point no Valve
Position corrections will be attempted while the Outlet
Temperature remains anywhere within the Deadband
ZONE. When the unit is in the DEADBAND MODE, the
°F or °C LED will flash on and off. When the Outlet
Temperature drifts out of the Deadband ZONE, the
DEADBAND MODE will be terminated and the PID
LOOP will again attempt Valve Position corrections.
Setting range is 0 to 25. (Default is 2 for both Deadband
High and Deadband Low)
IGST Version Displays the version of the IGST Board installed.
IGN Time Setting Displays the MAX Ignition time of 4 Seconds or 7
Seconds as set in the Safety String Harness.
Slow Shutdown Enables or Disables the slow shutdown feature. Default
is Disabled.
Slow Sht Duration With the Slow Shutdown feature Enabled, sets the time a
boiler will continue to run at the Stop Level after running
above the Slow Sht Threshold level for 60 Seconds.
Span is 0 to 9999 Seconds, Default is 60 Seconds.
Slow Sht Threshold Sets the Fire Rate above which a boiler will trigger the
Slow Shutdown feature.
Span is 40% to 100%, Default is 60%.