AERCO BMK 2000DF - Manual (Page 140)

Benchmark 1500DF - 2000DF Boilers
APPENDIX A – BOILER MENU DESCRIPTIONS
Page 140 of 196 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0098_0A
04/01/2014 Ph.: 800-526-0288 GF-144
Appendix A: Boiler Menu Item Descriptions – Continued
MENU LEVEL & OPTION DESCRIPTION
CONFIGURATION MENU (Cont.)
Aux Start On Dly Specifies the amount of time to wait (0 to 120 sec.)
between activating the Aux Relay (due to a demand)
and checking the pre-purge string to start the boiler.
Default is 0 sec.
Failsafe Mode Allows the Failsafe mode to be set to either Constant
Setpoint or Shutdown. Default is Shutdown.
Analog Output Must be set to Valve Pos 0-10V for BMK 1500 & 2000.
Lo Fire Timer Specifies how long (2 to 600 sec.) to remain in the low
fire position after ignition, before going to the desired
output. Default is 2 sec.
Setpt Limiting Setpoint Limiting can be Enables or Disablled. The
default setting is Enabled.
Setpt Limit Band The Setpoint Limit Band can be set from 0 to 10. The
default setting is 5.
Network Timeout Specifies the timeout value (seconds) before a
Modbus fault is declared. Available settings range from
5 to 999 seconds. Default is 30 seconds.
Shutoff Dly Temp This feature delays the shutdown of a boiler in order to
reduce excessive cycling. This specifies the
temperature value the Outlet Temperature is permitted
to rise above setpoint before being shut down.
Span is 0 to 25, Default is 10.
Demand Offset This entry will reduce excessive ON/OFF cycling in
AUTO mode. When this entry is a non-zero value, the
unit will not turn on again until Valve Position In
reaches the Start Level value AND the Outlet
Temperature goes below the Active Setpoint –
Demand Offset.
In addition, the boiler will fire at the
29% Valve Position level or below for a period of one
minute.
When this entry is set to zero, the unit will turn on
again as soon as the Valve Position in reaches the
Start Level
value. There will not be a one minute delay
when firing at the 29% Valve Position level.
Setting range is 0 to 25. (Default is 10)