Benchmark 1500 - 2000 Boilers
CHAPTER 3 – OPERATION
OMM-0097_0E AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 45 of 182
GF-142 Ph.: 800-526-0288 10/01/2015
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.
Table 3-5: Tuning Menu
Menu Item Display
Available Choices or Limits
Default
1
Prop Band
1°F (-17.2°C) 120°F (48.9°C) 70°F (21.1°C)
2 Integral Gain 0.00 2.00 1.00
3 Derivative Time 0.0 min 2.00 min 0.0min
4 Warmup Prop Band
1°F (-17.2°C) 120°F (48.9°C) 95 °F (35°C)
5 Warmup Int Gain 0.00 2.00 0.50
6 Warmup PID timer 0 sec. 240 sec. 20 sec.
7 Reset Defaults? Yes, No, Are You Sure? No
3.8 COMBUSTION CAL MENU
The Combustion Cal (Calibration) menu is protected by the level 2 password (6817) which must
be entered to view or change the menu items shown in Table 3-6. These menu items 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 then 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.
Table 3-6: Combustion Cal Menu
Menu Item Display
BMK 1500 BMK 2000
1 CAL Voltage 16% CAL Voltage 18%
2 CAL Voltage 30% CAL Voltage 30%
3 CAL Voltage 40% CAL Voltage 40%
4 CAL Voltage 50% CAL Voltage 50%
5 CAL Voltage 70% CAL Voltage 70%
6 CAL Voltage 100% CAL Voltage 100%
7 SET Valve Position SET Valve Position
8 Blower Output Blower Output
9 Set Stdby Volt Set Stdby Volt
10 Oxygen Level Oxygen Level
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