Aerco BENCHMARK 2500DF User Manual page 142

Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
Table A-1: Boiler Menu Item Descriptions – Continued
MENU LEVEL & OPTION
Aux Start On Dly
Failsafe Mode
Analog Output
Lo Fire Timer
Setpt Limiting
Setpt Limit Band
Network Timeout
Shutoff Dly Temp
Demand Offset
Page 142 of 234
05/21/2014
APPENDIX A – BOILER MENU ITEM DESCRIPTIONS
CONFIGURATION MENU
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.
Allows the Failsafe mode to be set to either Constant
Setpoint or Shutdown. Default is Shutdown.
Must be set to Valve Pos 0-10V for Benchmark 2500 &
3000.
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.
Setpoint Limiting can be Enables or Disabled. The
default setting is Enabled.
The Setpoint Limit Band can be set from 0 to 10. The
default setting is 5.
Specifies the timeout value (seconds) before a
Modbus fault is declared. Available settings range from
5 to 999 seconds. Default is 30 seconds.
This feature delays the shutdown of a boiler in order to
reduce
temperature value the Outlet Temperature is permitted
to rise above setpoint before being shut down.
Span is 0 to 25, Default is 10.
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)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
DESCRIPTION
– Continued
excessive cycling. This specifies the
OMM-0099_0A
GF-145