AERCO BMK 1.5 LN October 2012 - Manual (Page 40)

CHAPTER 3
OPERATION
Page 40 of 166 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 PR1:10/18/12
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
GF-120
OMM-0041 0E
Table 3-4. Configuration Menu - Continued
Available Choices or Limits
Menu Item Display Minimum Maximum Default
Failsafe Mode Shutdown or Constant Setpt Shutdown
*Analog Output
(See CAUTION at
end of Table 3-4 ) Off, Setpoint, Outlet Temp,
Valve Position 4-20 mA,
Valve Position 0-10V
*Valve
Position
0-10V
Low Fire Timer 2 sec. 600 sec. 2 sec.
Setpt Limiting Enabled or Disabled Disabled
Setpt Limit Band 0°F 10°F 5°F
Network Timeout 5 Sec 999 Sec 30 Sec
HI DB Setpt EN 0% 100% 30%
Demand Offsert 0 25 10
Deadband High 0 25 2
Deadband Low 0 25 2
Spark Monitor Enabled or Disabled Disabled
Spark Current Display
NOTE
Only the Unit Sizes applicable to the selected Unit Type will be displayed.
*CAUTION!
DO NOT CHANGE the Analog Output Menu Item from its Default setting
(Valve Position 0-10V).
3.7 TUNING MENU
The Tuning Menu items in Table 3-5 are Factory set for each individual unit. Do not change
these menu entries unless specifically requested to do so by Factory-Trained personnel.
3.8 COMBUSTION CAL MENU
The Combustion Cal (Calibration) Menu items in Table 3-6 are used to vary the speed of the
unit’s blower motor based on air temperature and air density at prescribed Air/Fuel Valve
positions (% open). This is accomplished by providing a DC drive voltage to the motor which
adjusts the rotational speed of the blower to maximize combustion efficiency and ensure the unit
conforms to the Nitrogen Oxide (NOx) and Carbon Monoxide (CO) emissions specified in
Chapter 4. The valve positions (%) and default drive voltages are listed in Table 3-6.