AERCO BMK 6000 Dual Fuel User Manual
Page 69
Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0096_0B
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 69 of 219
GF-141
Ph.: 800-526-0288
03/21/2014
PROPANE Gas Combustion Calibration – Continued
15.
Once the oxygen level is within the specified range at 100%, record the O
2
, NOx and
naivety CO readings on the Combustion Calibration Data Sheets provided with the unit.
16.
Lower the valve position to 85 %
using the ▼arrow key.
NOTE
The remaining combustion calibration steps are performed using
the Combustion Cal Menu included in the C-More Control System.
The combustion calibration control functions will be used to adjust
the oxygen level (%) at valve positions of 85%, 65%, 45%, 30%
and 18% as described in the following steps. These steps assume
that the inlet air temperature is within the range of 50°F to 100°F. If
NOx readings exceed the target values shown, increase the O
2
level up to 1% higher than the listed calibration range. Record the
increased O
2
value on the Combustion Calibration sheet.
17.
Press the MENU key on the front panel of the C-MORE and access the Setup menu. Enter
password 6817 and then press the ENTER key.
18.
Press the MENU key on the front panel of the C-MORE until Combustion Cal Menu
appears on the display.
19.
Press the ▲ arrow key until SET Valve Position appears on the display.
20.
Press the CHANGE key. SET Valve Position will begin to flash.
21.
Press the ▲ arrow key until the SET Valve Position reads 85%. Press the ENTER key.
22.
Next, press the down
(▼) arrow key until CAL Voltage 85% is displayed.
23.
Press the CHANGE key and observe that CAL Voltage 85% is flashing.
24.
The oxygen level at the 85% valve position should be as shown below. Also, ensure that
the nitrogen oxide (NOx) and carbon monoxide (CO) readings do not exceed the following
values:
Combustion Calibration Readings
Valve Position
Oxygen (O
2
) %
Nitrogen Oxide (NOx)
Carbon Monoxide (CO)
85%
5.5% - ± 0.5%
<200 ppm
<200 ppm
25.
If the oxygen level is not within the specified range, adjust the
level using the ▲ and ▼
arrow keys. This will adjust the output voltage to the blower motor as indicated on the
display. Pressing the ▲ arrow key increases the oxygen level and pressing the down ▼
arrow key decreases the oxygen level.
26.
Once the oxygen level is within the specified range at 85%, press the ENTER key to store
the selected blower output voltage for the 85% valve position. Record all readings on the
Combustion Calibration Sheets provided.
27.
Repeat steps 20 through 26 for valve positions of 65%, 45%, 30% and 18%. The oxygen
(O
2
), nitrogen oxide (NOx) and carbon monoxide (CO) should remain within the same limits
for all valve positions as shown in the following table.