APPENDIX A: MENU ITEM DESCRIPTIONS
PR2: 04/22/13 Page
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Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
Table A-1: Boiler Menu Item Descriptions
MENU LEVEL & OPTION
DESCRIPTION
CONFIGURATION MENU
(Cont.)
Reset Ratio
Permits setting of Reset Ratio when operating boiler
in the Outdoor Reset Mode. Reset Ratio is
adjustable from 0.1 to 9.9. Default is 1.2.
Outdoor Sensor
Allows outdoor sensor function to be enabled or
disabled. Default is disabled.
System Start Tmp
If outdoor sensor is enabled, this menu item allows
the system start temperature to be set from 30 to
100°F. Default is 60°F.
Setpoint Lo Limit
Used to set the minimum allowable setpoint (40°F to
Setpoint Hi Limit). Default is 60°F
Setpoint Hi Limit
Used to set the maximum allowable setpoint
(Setpoint Lo Limit to 195°F). Default is 195°F.
Temp Hi Limit
This is the maximum allowable outlet temperature
(40 to 210°F). Any temperature above this setting
will turn off the unit. The temperature must then drop
5° below this setting to allow the unit to run. Default
Hi Limit is 195°F.
Max Valve Positon
Sets the maximum allowable valve position for the
unit (40% to 100%). Default is 100%.
Pump Delay Timer
Specifies the amount of time (0 to 30 min.) to keep
the pump running after the unit turns off. Default is
zero.
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 Benchmark
2.0LN.
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.
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.
