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Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 4: INITIAL START-UP
PROPANE Combustion Calibration Instructions
16. Press the Down▼ arrow key until SET Valve Position appears on the display, then press
CHANGE.
17. Press the Up ▲ arrow key until the SET Valve Position reads 100%, then press ENTER.
18. With the valve position at 100%, insert the combustion analyzer probe into the exhaust
manifold probe opening (see Figure 4-2 in Section 4.2.3) and allow enough time for the
combustion analyzer reading to stabilize.
19. Compare the combustion analyzer's oxygen readings to the O
the Operating menu on the C-More Controller. The offset value in the Calibration menu can
be adjusted by ±3% to make the on-board O
analyzer. If the values differ by more than ±3% and your combustion analyzer is correctly
calibrated, the on-board O
20. Compare the measured oxygen level to the oxygen range shown in Table 4-5. Also, ensure
that the nitrogen oxide (NO
values shown in Table 4-5. If you are not in a "NO
measurement in your analyzer, set the oxygen (O
TABLE 4-5: PROPANE Calibration Reading at 100% Valve Position
Model
Single-Fuel
5000
5.5% ± 0.5%
6000
5.0% ± 0.5%
21. Next, press the Down ▼ arrow key until CAL Voltage 100% is displayed.
22. Press the CHANGE key and observe that CAL Voltage 100% is flashing.
23. The oxygen level at the 100% valve position should be as shown in Table 4-5. Also, ensure
that the NO
and CO readings do not exceed the values shown in Table 4-5.
x
24. 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 Up ▲ arrow key increases the oxygen level and pressing the down
▼ arrow key decreases the oxygen level.
25. Once the oxygen level is within the specified range at 100%, press the ENTER key to store
the selected blower output voltage for the 100% valve position. Record all readings on the
Combustion Calibration Sheets provided.
26. With the valve position at 100%, if the oxygen level is not within the required tolerance after
adjusting the blower voltage, then the gas pressure on the downstream side of the SSOV
must be adjusted using the gas pressure adjustment screw on the SSOV (Figure 4-3).
Slowly rotate the gas pressure adjustment in 1/4-turn increments, clockwise to reduce O
level or counterclockwise to increase it. Allow the combustion analyzer to stabilize
following each adjustment.
27. Once the oxygen level is within the specified range at 100%, record the O
readings on the Combustion Calibration Data Sheets provided with the unit.
28. Lower the valve position to 70% using the ▼arrow key.
OMM-0123_E • GF-207 • 12/17/2019
2
sensor may be defective and need to be replaced
2
) and carbon monoxide (CO) readings do not exceed the
x
Oxygen (O
) %
2
Dual-Fuel
5.5% ± 0.5%
5.0% ± 0.5%
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Sensor value displayed in
2
sensor match the value from the combustion
-limited" area and/or do not have a NO
x
) at 5.5% ± 0.5%.
2
Nitrogen Oxide
Carbon Monoxide
(NO
)
x
≤100 ppm
≤100 ppm
x
(CO)
<100 ppm
<100 ppm
2
, NO
and CO
2
x
Page 56 of 95
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